[PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[Alexandre Belloni]

This patch set is a followup of my previous series: iio: adc: at91 fixes

I'm sorry it is so long, I made sure this is bissectable.

1-3) The first 3 patches are cleaning up the patform_data used for at91_adc.

4-5) Then touchscreen support for older ADCs is added, this allows to use that
     for the sam9m10g45ek.

6) Following those modifications, the mach/at91_adc.h is not used anywhere but
   in the at91_adc driver so it is remove and its content (register definitions)
   placed directly in the driver.

7-9) at91sam9rl support is added to at91_adc and is used for the at91sam9rl
     based boards.

10-11) Prepare the atmel_tsadcc removal by switching sam9rl and sam9g45 to use
       only at91_adc instead of atmel_tsadcc.

12-15) atmel_tsadcc removal


Alexandre Belloni (15):
  ARM: at91: sam9g45: remove unused platform_data
  ARM: at91: sam9260: remove unused platform_data
  iio: adc: at91: cleanup platform_data
  iio: adc: at91_adc: Add support for touchscreens without TSMR
  ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc
  iio: adc: at91: remove unused include from include/mach
  iio: adc: at91: add sam9rl support
  ARM: at91: sam9rl: add at91_adc to support adc and touchscreen
  ARM: at91: sam9rlek add touchscreen support through at91_adc
  ARM: at91: sam9g45: switch from atmel_tsadcc to at91_adc
  ARM: at91: sam9rl: switch from atmel_tsadcc to at91_adc
  ARM: at91: remove atmel_tsadcc platform_data
  ARM: at91: remove atmel_tsadcc from sama5_defconfig
  Input: atmel_tsadcc: remove driver
  ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node

 MAINTAINERS                                |   6 -
 arch/arm/boot/dts/at91-cosino_mega2560.dts |   5 -
 arch/arm/configs/at91sam9g45_defconfig     |   3 +-
 arch/arm/configs/at91sam9rl_defconfig      |   3 +-
 arch/arm/configs/sama5_defconfig           |   1 -
 arch/arm/mach-at91/at91sam9260_devices.c   |  10 -
 arch/arm/mach-at91/at91sam9g45.c           |   2 +-
 arch/arm/mach-at91/at91sam9g45_devices.c   |  63 +----
 arch/arm/mach-at91/at91sam9rl.c            |   7 +
 arch/arm/mach-at91/at91sam9rl_devices.c    |  83 +++++--
 arch/arm/mach-at91/board-sam9m10g45ek.c    |  16 +-
 arch/arm/mach-at91/board-sam9rlek.c        |  16 +-
 arch/arm/mach-at91/board.h                 |   3 -
 arch/arm/mach-at91/include/mach/at91_adc.h | 107 ---------
 drivers/iio/adc/at91_adc.c                 | 339 +++++++++++++++++++++++----
 drivers/input/touchscreen/Kconfig          |  12 -
 drivers/input/touchscreen/Makefile         |   1 -
 drivers/input/touchscreen/atmel_tsadcc.c   | 358 -----------------------------
 include/linux/platform_data/at91_adc.h     |  27 +--
 include/linux/platform_data/atmel.h        |   7 -
 20 files changed, 380 insertions(+), 689 deletions(-)
 delete mode 100644 arch/arm/mach-at91/include/mach/at91_adc.h
 delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c

-- 
1.8.3.2

[PATCH 01/15] ARM: at91: sam9g45: remove unused platform_data

[Alexandre Belloni]

num_channels and registers are not used anymore since they are defined inside
the at91_adc driver and assigned by matching the id_table.

Also, remove the mach/at91_adc.h include that is not necessary anymore.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/at91sam9g45_devices.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 88554024eb2d..cd36009c3511 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -25,7 +25,6 @@
 #include <linux/fb.h>
 #include <video/atmel_lcdc.h>
 
-#include <mach/at91_adc.h>
 #include <mach/at91sam9g45.h>
 #include <mach/at91sam9g45_matrix.h>
 #include <mach/at91_matrix.h>
@@ -1235,13 +1234,6 @@ static struct at91_adc_trigger at91_adc_triggers[] = {
 	},
 };
 
-static struct at91_adc_reg_desc at91_adc_register_g45 = {
-	.channel_base = AT91_ADC_CHR(0),
-	.drdy_mask = AT91_ADC_DRDY,
-	.status_register = AT91_ADC_SR,
-	.trigger_register = 0x08,
-};
-
 void __init at91_add_device_adc(struct at91_adc_data *data)
 {
 	if (!data)
@@ -1267,9 +1259,7 @@ void __init at91_add_device_adc(struct at91_adc_data *data)
 	if (data->use_external_triggers)
 		at91_set_A_periph(AT91_PIN_PD28, 0);
 
-	data->num_channels = 8;
 	data->startup_time = 40;
-	data->registers = &at91_adc_register_g45;
 	data->trigger_number = 4;
 	data->trigger_list = at91_adc_triggers;
 
-- 
1.8.3.2

[PATCH 02/15] ARM: at91: sam9260: remove unused platform_data

[Alexandre Belloni]

num_channels and registers are not used anymore since they are defined inside
the at91_adc driver and assigned by matching the id_table.

Also, remove the mach/at91_adc.h include that is not necessary anymore.

Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
---
 arch/arm/mach-at91/at91sam9260_devices.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index 0a0315920963..a299c50512f0 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -24,7 +24,6 @@
 #include <mach/at91sam9260_matrix.h>
 #include <mach/at91_matrix.h>
 #include <mach/at91sam9_smc.h>
-#include <mach/at91_adc.h>
 
 #include "board.h"
 #include "generic.h"
@@ -1321,13 +1320,6 @@ static struct at91_adc_trigger at91_adc_triggers[] = {
 	},
 };
 
-static struct at91_adc_reg_desc at91_adc_register_g20 = {
-	.channel_base = AT91_ADC_CHR(0),
-	.drdy_mask = AT91_ADC_DRDY,
-	.status_register = AT91_ADC_SR,
-	.trigger_register = AT91_ADC_MR,
-};
-
 void __init at91_add_device_adc(struct at91_adc_data *data)
 {
 	if (!data)
@@ -1345,9 +1337,7 @@ void __init at91_add_device_adc(struct at91_adc_data *data)
 	if (data->use_external_triggers)
 		at91_set_A_periph(AT91_PIN_PA22, 0);
 
-	data->num_channels = 4;
 	data->startup_time = 10;
-	data->registers = &at91_adc_register_g20;
 	data->trigger_number = 4;
 	data->trigger_list = at91_adc_triggers;
 
-- 
1.8.3.2

[PATCH 03/15] iio: adc: at91: cleanup platform_data

[Alexandre Belloni]

num_channels and registers are not used anymore since they are defined inside
the driver and assigned by matching the id_table.

Also, struct at91_adc_reg_desc is now only used inside the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 drivers/iio/adc/at91_adc.c             | 19 +++++++++++++++++++
 include/linux/platform_data/at91_adc.h | 23 -----------------------
 2 files changed, 19 insertions(+), 23 deletions(-)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 89777ed9abd8..1beae65aef2c 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -46,6 +46,25 @@
 #define TOUCH_SAMPLE_PERIOD_US		2000	/* 2ms */
 #define TOUCH_PEN_DETECT_DEBOUNCE_US	200
 
+/**
+ * struct at91_adc_reg_desc - Various informations relative to registers
+ * @channel_base:	Base offset for the channel data registers
+ * @drdy_mask:		Mask of the DRDY field in the relevant registers
+			(Interruptions registers mostly)
+ * @status_register:	Offset of the Interrupt Status Register
+ * @trigger_register:	Offset of the Trigger setup register
+ * @mr_prescal_mask:	Mask of the PRESCAL field in the adc MR register
+ * @mr_startup_mask:	Mask of the STARTUP field in the adc MR register
+ */
+struct at91_adc_reg_desc {
+	u8	channel_base;
+	u32	drdy_mask;
+	u8	status_register;
+	u8	trigger_register;
+	u32	mr_prescal_mask;
+	u32	mr_startup_mask;
+};
+
 struct at91_adc_caps {
 	bool	has_ts;		/* Support touch screen */
 	bool	has_tsmr;	/* only at91sam9x5, sama5d3 have TSMR reg */
diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
index b3ca1e94e0c8..fcf73879dbfe 100644
--- a/include/linux/platform_data/at91_adc.h
+++ b/include/linux/platform_data/at91_adc.h
@@ -8,25 +8,6 @@
 #define _AT91_ADC_H_
 
 /**
- * struct at91_adc_reg_desc - Various informations relative to registers
- * @channel_base:	Base offset for the channel data registers
- * @drdy_mask:		Mask of the DRDY field in the relevant registers
-			(Interruptions registers mostly)
- * @status_register:	Offset of the Interrupt Status Register
- * @trigger_register:	Offset of the Trigger setup register
- * @mr_prescal_mask:	Mask of the PRESCAL field in the adc MR register
- * @mr_startup_mask:	Mask of the STARTUP field in the adc MR register
- */
-struct at91_adc_reg_desc {
-	u8	channel_base;
-	u32	drdy_mask;
-	u8	status_register;
-	u8	trigger_register;
-	u32	mr_prescal_mask;
-	u32	mr_startup_mask;
-};
-
-/**
  * struct at91_adc_trigger - description of triggers
  * @name:		name of the trigger advertised to the user
  * @value:		value to set in the ADC's trigger setup register
@@ -42,8 +23,6 @@ struct at91_adc_trigger {
 /**
  * struct at91_adc_data - platform data for ADC driver
  * @channels_used:		channels in use on the board as a bitmask
- * @num_channels:		global number of channels available on the board
- * @registers:			Registers definition on the board
  * @startup_time:		startup time of the ADC in microseconds
  * @trigger_list:		Triggers available in the ADC
  * @trigger_number:		Number of triggers available in the ADC
@@ -52,8 +31,6 @@ struct at91_adc_trigger {
  */
 struct at91_adc_data {
 	unsigned long			channels_used;
-	u8				num_channels;
-	struct at91_adc_reg_desc	*registers;
 	u8				startup_time;
 	struct at91_adc_trigger		*trigger_list;
 	u8				trigger_number;
-- 
1.8.3.2

[PATCH 04/15] iio: adc: at91_adc: Add support for touchscreens without TSMR

[Alexandre Belloni]

Old ADCs, as present on the sam9rl and the sam9g45 don't have a TSMR register
and the touchscreen support should be handled differently.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/include/mach/at91_adc.h |  13 ++
 drivers/iio/adc/at91_adc.c                 | 199 ++++++++++++++++++++++-------
 include/linux/platform_data/at91_adc.h     |   8 ++
 3 files changed, 172 insertions(+), 48 deletions(-)

diff --git a/arch/arm/mach-at91/include/mach/at91_adc.h b/arch/arm/mach-at91/include/mach/at91_adc.h
index c287307b9a3b..7d80396346b2 100644
--- a/arch/arm/mach-at91/include/mach/at91_adc.h
+++ b/arch/arm/mach-at91/include/mach/at91_adc.h
@@ -20,6 +20,9 @@
 #define		AT91_ADC_START		(1 << 1)	/* Start Conversion */
 
 #define AT91_ADC_MR		0x04		/* Mode Register */
+#define		AT91_ADC_TSAMOD		(3 << 0)	/* ADC mode */
+#define		AT91_ADC_TSAMOD_ADC_ONLY_MODE		(0 << 0)	/* ADC Mode */
+#define		AT91_ADC_TSAMOD_TS_ONLY_MODE		(1 << 0)	/* Touch Screen Only Mode */
 #define		AT91_ADC_TRGEN		(1 << 0)	/* Trigger Enable */
 #define		AT91_ADC_TRGSEL		(7 << 1)	/* Trigger Selection */
 #define			AT91_ADC_TRGSEL_TC0		(0 << 1)
@@ -28,6 +31,7 @@
 #define			AT91_ADC_TRGSEL_EXTERNAL	(6 << 1)
 #define		AT91_ADC_LOWRES		(1 << 4)	/* Low Resolution */
 #define		AT91_ADC_SLEEP		(1 << 5)	/* Sleep Mode */
+#define		AT91_ADC_PENDET		(1 << 6)	/* Pen contact detection enable */
 #define		AT91_ADC_PRESCAL_9260	(0x3f << 8)	/* Prescalar Rate Selection */
 #define		AT91_ADC_PRESCAL_9G45	(0xff << 8)
 #define			AT91_ADC_PRESCAL_(x)	((x) << 8)
@@ -37,6 +41,12 @@
 #define			AT91_ADC_STARTUP_(x)	((x) << 16)
 #define		AT91_ADC_SHTIM		(0xf  << 24)	/* Sample & Hold Time */
 #define			AT91_ADC_SHTIM_(x)	((x) << 24)
+#define		AT91_ADC_PENDBC		(0x0f << 28)	/* Pen Debounce time */
+#define			AT91_ADC_PENDBC_(x)	((x) << 28)
+
+#define AT91_ADC_TSR		0x0C
+#define		AT91_ADC_TSR_SHTIM	(0xf  << 24)	/* Sample & Hold Time */
+#define			AT91_ADC_TSR_SHTIM_(x)	((x) << 24)
 
 #define AT91_ADC_CHER		0x10		/* Channel Enable Register */
 #define AT91_ADC_CHDR		0x14		/* Channel Disable Register */
@@ -60,6 +70,8 @@
 #define AT91_ADC_IER		0x24		/* Interrupt Enable Register */
 #define AT91_ADC_IDR		0x28		/* Interrupt Disable Register */
 #define AT91_ADC_IMR		0x2C		/* Interrupt Mask Register */
+#define		AT91RL_ADC_IER_PEN	(1 << 20)
+#define		AT91RL_ADC_IER_NOPEN	(1 << 21)
 #define		AT91_ADC_IER_PEN	(1 << 29)
 #define		AT91_ADC_IER_NOPEN	(1 << 30)
 #define		AT91_ADC_IER_XRDY	(1 << 20)
@@ -102,6 +114,7 @@
 #define		AT91_ADC_TRGR_TRGPER	(0xffff << 16)
 #define			AT91_ADC_TRGR_TRGPER_(x)	((x) << 16)
 #define		AT91_ADC_TRGR_TRGMOD	(0x7 << 0)
+#define			AT91_ADC_TRGR_NONE		(0 << 0)
 #define			AT91_ADC_TRGR_MOD_PERIOD_TRIG	(5 << 0)
 
 #endif
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 1beae65aef2c..3e92b16e9301 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -46,6 +46,10 @@
 #define TOUCH_SAMPLE_PERIOD_US		2000	/* 2ms */
 #define TOUCH_PEN_DETECT_DEBOUNCE_US	200
 
+#define MAX_RLPOS_BITS         10
+#define TOUCH_SAMPLE_PERIOD_US_RL      10000   /* 10ms, the SoC can't keep up with 2ms */
+#define TOUCH_SHTIM                    0xa
+
 /**
  * struct at91_adc_reg_desc - Various informations relative to registers
  * @channel_base:	Base offset for the channel data registers
@@ -83,12 +87,6 @@ struct at91_adc_caps {
 	struct at91_adc_reg_desc registers;
 };
 
-enum atmel_adc_ts_type {
-	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
-	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
-	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
-};
-
 struct at91_adc_state {
 	struct clk		*adc_clk;
 	u16			*buffer;
@@ -133,6 +131,11 @@ struct at91_adc_state {
 
 	u16			ts_sample_period_val;
 	u32			ts_pressure_threshold;
+	u16			ts_pendbc;
+
+	u8			ts_bufferedmeasure;
+	u32			ts_prev_absx;
+	u32			ts_prev_absy;
 };
 
 static irqreturn_t at91_adc_trigger_handler(int irq, void *p)
@@ -239,19 +242,68 @@ static int at91_ts_sample(struct at91_adc_state *st)
 	return 0;
 }
 
-static irqreturn_t at91_adc_interrupt(int irq, void *private)
+void handle_adc_rl_ts_irq(int irq, struct at91_adc_state *st, u32 status)
+{
+	unsigned int reg;
+
+	status &= at91_adc_readl(st, AT91_ADC_IMR);
+	if (status & AT91RL_ADC_IER_PEN) {
+		/* Disabling pen debounce is required to get a NOPEN irq */
+		reg = at91_adc_readl(st, AT91_ADC_MR);
+		reg &= ~AT91_ADC_PENDBC;
+		at91_adc_writel(st, AT91_ADC_MR, reg);
+
+		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
+		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_NOPEN
+				| AT91_ADC_EOC(3));
+		/* Set up period trigger for sampling */
+		at91_adc_writel(st, st->registers->trigger_register,
+			AT91_ADC_TRGR_MOD_PERIOD_TRIG |
+			AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val));
+	} else if (status & AT91RL_ADC_IER_NOPEN) {
+		reg = at91_adc_readl(st, AT91_ADC_MR);
+		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;
+		at91_adc_writel(st, AT91_ADC_MR, reg);
+		at91_adc_writel(st, st->registers->trigger_register,
+			AT91_ADC_TRGR_NONE);
+
+		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_NOPEN
+				| AT91_ADC_EOC(3));
+		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);
+		st->ts_bufferedmeasure = 0;
+		input_report_key(st->ts_input, BTN_TOUCH, 0);
+		input_sync(st->ts_input);
+	} else if (status & AT91_ADC_EOC(3)) {
+		/* Conversion finished */
+		if (st->ts_bufferedmeasure) {
+			/* Last measurement is always discarded, since it can
+			 * be erroneous.
+			 * Always report previous measurement */
+			input_report_abs(st->ts_input, ABS_X, st->ts_prev_absx);
+			input_report_abs(st->ts_input, ABS_Y, st->ts_prev_absy);
+			input_report_key(st->ts_input, BTN_TOUCH, 1);
+			input_sync(st->ts_input);
+		} else
+			st->ts_bufferedmeasure = 1;
+
+		/* Now make new measurement */
+		st->ts_prev_absx = at91_adc_readl(st, AT91_ADC_CHAN(st, 3))
+				   << MAX_RLPOS_BITS;
+		st->ts_prev_absx /= at91_adc_readl(st, AT91_ADC_CHAN(st, 2));
+
+		st->ts_prev_absy = at91_adc_readl(st, AT91_ADC_CHAN(st, 1))
+				   << MAX_RLPOS_BITS;
+		st->ts_prev_absy /= at91_adc_readl(st, AT91_ADC_CHAN(st, 0));
+	}
+}
+
+void handle_adc_9x5_ts_irq(int irq, struct at91_adc_state *st, u32 status)
 {
-	struct iio_dev *idev = private;
-	struct at91_adc_state *st = iio_priv(idev);
-	u32 status = at91_adc_readl(st, st->registers->status_register);
 	const uint32_t ts_data_irq_mask =
 		AT91_ADC_IER_XRDY |
 		AT91_ADC_IER_YRDY |
 		AT91_ADC_IER_PRDY;
 
-	if (status & st->registers->drdy_mask)
-		handle_adc_eoc_trigger(irq, idev);
-
 	if (status & AT91_ADC_IER_PEN) {
 		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
 		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_NOPEN |
@@ -283,6 +335,21 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private)
 			at91_adc_readl(st, AT91_ADC_TSPRESSR);
 		}
 	}
+}
+
+static irqreturn_t at91_adc_interrupt(int irq, void *private)
+{
+	struct iio_dev *idev = private;
+	struct at91_adc_state *st = iio_priv(idev);
+	u32 status = at91_adc_readl(st, st->registers->status_register);
+
+	if (status & st->registers->drdy_mask)
+		handle_adc_eoc_trigger(irq, idev);
+
+	if (st->caps->has_tsmr)
+		handle_adc_9x5_ts_irq(irq, st, status);
+	else
+		handle_adc_rl_ts_irq(irq, st, status);
 
 	return IRQ_HANDLED;
 }
@@ -672,6 +739,8 @@ static int at91_adc_probe_dt_ts(struct device_node *node,
 		return -EINVAL;
 	}
 
+	if (!st->caps->has_tsmr)
+		return 0;
 	prop = 0;
 	of_property_read_u32(node, "atmel,adc-ts-pressure-threshold", &prop);
 	st->ts_pressure_threshold = prop;
@@ -795,6 +864,7 @@ static int at91_adc_probe_pdata(struct at91_adc_state *st,
 	st->trigger_number = pdata->trigger_number;
 	st->trigger_list = pdata->trigger_list;
 	st->registers = &st->caps->registers;
+	st->touchscreen_type = pdata->touchscreen_type;
 
 	return 0;
 }
@@ -809,7 +879,10 @@ static int atmel_ts_open(struct input_dev *dev)
 {
 	struct at91_adc_state *st = input_get_drvdata(dev);
 
-	at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);
+	if (st->caps->has_tsmr)
+		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);
+	else
+		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);
 	return 0;
 }
 
@@ -817,45 +890,61 @@ static void atmel_ts_close(struct input_dev *dev)
 {
 	struct at91_adc_state *st = input_get_drvdata(dev);
 
-	at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
+	if (st->caps->has_tsmr)
+		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
+	else
+		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
 }
 
 static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
 {
-	u32 reg = 0, pendbc;
+	u32 reg = 0;
 	int i = 0;
 
-	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)
-		reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS;
-	else
-		reg = AT91_ADC_TSMR_TSMODE_5WIRE;
-
 	/* a Pen Detect Debounce Time is necessary for the ADC Touch to avoid
 	 * pen detect noise.
 	 * The formula is : Pen Detect Debounce Time = (2 ^ pendbc) / ADCClock
 	 */
-	pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz / 1000, 1);
+	st->ts_pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz /
+				 1000, 1);
 
-	while (pendbc >> ++i)
+	while (st->ts_pendbc >> ++i)
 		;	/* Empty! Find the shift offset */
-	if (abs(pendbc - (1 << i)) < abs(pendbc - (1 << (i - 1))))
-		pendbc = i;
+	if (abs(st->ts_pendbc - (1 << i)) < abs(st->ts_pendbc - (1 << (i - 1))))
+		st->ts_pendbc = i;
 	else
-		pendbc = i - 1;
+		st->ts_pendbc = i - 1;
 
-	if (st->caps->has_tsmr) {
-		reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)
-				& AT91_ADC_TSMR_TSAV;
-		reg |= AT91_ADC_TSMR_PENDBC_(pendbc) & AT91_ADC_TSMR_PENDBC;
-		reg |= AT91_ADC_TSMR_NOTSDMA;
-		reg |= AT91_ADC_TSMR_PENDET_ENA;
-		reg |= 0x03 << 8;	/* TSFREQ, need bigger than TSAV */
-
-		at91_adc_writel(st, AT91_ADC_TSMR, reg);
-	} else {
-		/* TODO: for 9g45 which has no TSMR */
+	if (!st->caps->has_tsmr) {
+		reg = at91_adc_readl(st, AT91_ADC_MR);
+		reg |= AT91_ADC_TSAMOD_TS_ONLY_MODE | AT91_ADC_PENDET;
+
+		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;
+		at91_adc_writel(st, AT91_ADC_MR, reg);
+
+		reg = AT91_ADC_TSR_SHTIM_(TOUCH_SHTIM) & AT91_ADC_TSR_SHTIM;
+		at91_adc_writel(st, AT91_ADC_TSR, reg);
+
+		st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US_RL *
+						    adc_clk_khz / 1000) - 1, 1);
+
+		return 0;
 	}
 
+	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)
+		reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS;
+	else
+		reg = AT91_ADC_TSMR_TSMODE_5WIRE;
+
+	reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)
+	       & AT91_ADC_TSMR_TSAV;
+	reg |= AT91_ADC_TSMR_PENDBC_(st->ts_pendbc) & AT91_ADC_TSMR_PENDBC;
+	reg |= AT91_ADC_TSMR_NOTSDMA;
+	reg |= AT91_ADC_TSMR_PENDET_ENA;
+	reg |= 0x03 << 8;	/* TSFREQ, needs to be bigger than TSAV */
+
+	at91_adc_writel(st, AT91_ADC_TSMR, reg);
+
 	/* Change adc internal resistor value for better pen detection,
 	 * default value is 100 kOhm.
 	 * 0 = 200 kOhm, 1 = 150 kOhm, 2 = 100 kOhm, 3 = 50 kOhm
@@ -864,7 +953,7 @@ static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
 	at91_adc_writel(st, AT91_ADC_ACR, st->caps->ts_pen_detect_sensitivity
 			& AT91_ADC_ACR_PENDETSENS);
 
-	/* Sample Peroid Time = (TRGPER + 1) / ADCClock */
+	/* Sample Period Time = (TRGPER + 1) / ADCClock */
 	st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US *
 			adc_clk_khz / 1000) - 1, 1);
 
@@ -893,17 +982,37 @@ static int at91_ts_register(struct at91_adc_state *st,
 	__set_bit(EV_ABS, input->evbit);
 	__set_bit(EV_KEY, input->evbit);
 	__set_bit(BTN_TOUCH, input->keybit);
-	input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1, 0, 0);
-	input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1, 0, 0);
-	input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0);
+	if (st->caps->has_tsmr) {
+		input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1,
+				     0, 0);
+		input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1,
+				     0, 0);
+		input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0);
+	} else {
+		if (st->touchscreen_type != ATMEL_ADC_TOUCHSCREEN_4WIRE) {
+			dev_err(&pdev->dev,
+				"This touchscreen controller only support 4 wires\n");
+			ret = -EINVAL;
+			goto err;
+		}
+
+		input_set_abs_params(input, ABS_X, 0, (1 << MAX_RLPOS_BITS) - 1,
+				     0, 0);
+		input_set_abs_params(input, ABS_Y, 0, (1 << MAX_RLPOS_BITS) - 1,
+				     0, 0);
+	}
 
 	st->ts_input = input;
 	input_set_drvdata(input, st);
 
 	ret = input_register_device(input);
 	if (ret)
-		input_free_device(st->ts_input);
+		goto err;
+
+	return ret;
 
+err:
+	input_free_device(st->ts_input);
 	return ret;
 }
 
@@ -1070,12 +1179,6 @@ static int at91_adc_probe(struct platform_device *pdev)
 			goto error_disable_adc_clk;
 		}
 	} else {
-		if (!st->caps->has_tsmr) {
-			dev_err(&pdev->dev, "We don't support non-TSMR adc\n");
-			ret = -ENODEV;
-			goto error_disable_adc_clk;
-		}
-
 		ret = at91_ts_register(st, pdev);
 		if (ret)
 			goto error_disable_adc_clk;
diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
index fcf73879dbfe..7819fc787731 100644
--- a/include/linux/platform_data/at91_adc.h
+++ b/include/linux/platform_data/at91_adc.h
@@ -7,6 +7,12 @@
 #ifndef _AT91_ADC_H_
 #define _AT91_ADC_H_
 
+enum atmel_adc_ts_type {
+	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
+	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
+	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
+};
+
 /**
  * struct at91_adc_trigger - description of triggers
  * @name:		name of the trigger advertised to the user
@@ -28,6 +34,7 @@ struct at91_adc_trigger {
  * @trigger_number:		Number of triggers available in the ADC
  * @use_external_triggers:	does the board has external triggers availables
  * @vref:			Reference voltage for the ADC in millivolts
+ * @touchscreen_type:		If a touchscreen is connected, its type (4 or 5 wires)
  */
 struct at91_adc_data {
 	unsigned long			channels_used;
@@ -36,6 +43,7 @@ struct at91_adc_data {
 	u8				trigger_number;
 	bool				use_external_triggers;
 	u16				vref;
+	enum atmel_adc_ts_type		touchscreen_type;
 };
 
 extern void __init at91_add_device_adc(struct at91_adc_data *data);
-- 
1.8.3.2

[PATCH 05/15] ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc

[Alexandre Belloni]

at91_adc now supports reading a touchscreen for ADCs without a TSMR register.
Enable touchscreen support through at91_adc. This allows to use both a
touchscreen and the remaining ADC channel at the same time.

Also, lower the clock for the ADC as it allows to have more stable reads and
this is the speed used by atmel_tsadcc.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/at91sam9g45.c        | 2 +-
 arch/arm/mach-at91/board-sam9m10g45ek.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index 2f455ce35268..3c519a7a938f 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -181,7 +181,7 @@ static struct clk vdec_clk = {
 static struct clk adc_op_clk = {
 	.name		= "adc_op_clk",
 	.type		= CLK_TYPE_PERIPHERAL,
-	.rate_hz	= 13200000,
+	.rate_hz	= 300000,
 };
 
 /* AES/TDES/SHA clock - Only for sam9m11/sam9g56 */
diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
index ef39078c8ce2..4d775b796ce4 100644
--- a/arch/arm/mach-at91/board-sam9m10g45ek.c
+++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
@@ -315,6 +315,7 @@ static struct at91_adc_data ek_adc_data = {
 	.channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7),
 	.use_external_triggers = true,
 	.vref = 3300,
+	.touchscreen_type = ATMEL_ADC_TOUCHSCREEN_4WIRE,
 };
 
 /*
-- 
1.8.3.2

[PATCH 06/15] iio: adc: at91: remove unused include from include/mach

[Alexandre Belloni]

That include file is now only used by the at91_adc driver, remove it from
include/mach for better driver separation.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/include/mach/at91_adc.h | 120 -----------------------------
 drivers/iio/adc/at91_adc.c                 | 103 ++++++++++++++++++++++++-
 2 files changed, 102 insertions(+), 121 deletions(-)
 delete mode 100644 arch/arm/mach-at91/include/mach/at91_adc.h

diff --git a/arch/arm/mach-at91/include/mach/at91_adc.h b/arch/arm/mach-at91/include/mach/at91_adc.h
deleted file mode 100644
index 7d80396346b2..000000000000
--- a/arch/arm/mach-at91/include/mach/at91_adc.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * arch/arm/mach-at91/include/mach/at91_adc.h
- *
- * Copyright (C) SAN People
- *
- * Analog-to-Digital Converter (ADC) registers.
- * Based on AT91SAM9260 datasheet revision D.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef AT91_ADC_H
-#define AT91_ADC_H
-
-#define AT91_ADC_CR		0x00		/* Control Register */
-#define		AT91_ADC_SWRST		(1 << 0)	/* Software Reset */
-#define		AT91_ADC_START		(1 << 1)	/* Start Conversion */
-
-#define AT91_ADC_MR		0x04		/* Mode Register */
-#define		AT91_ADC_TSAMOD		(3 << 0)	/* ADC mode */
-#define		AT91_ADC_TSAMOD_ADC_ONLY_MODE		(0 << 0)	/* ADC Mode */
-#define		AT91_ADC_TSAMOD_TS_ONLY_MODE		(1 << 0)	/* Touch Screen Only Mode */
-#define		AT91_ADC_TRGEN		(1 << 0)	/* Trigger Enable */
-#define		AT91_ADC_TRGSEL		(7 << 1)	/* Trigger Selection */
-#define			AT91_ADC_TRGSEL_TC0		(0 << 1)
-#define			AT91_ADC_TRGSEL_TC1		(1 << 1)
-#define			AT91_ADC_TRGSEL_TC2		(2 << 1)
-#define			AT91_ADC_TRGSEL_EXTERNAL	(6 << 1)
-#define		AT91_ADC_LOWRES		(1 << 4)	/* Low Resolution */
-#define		AT91_ADC_SLEEP		(1 << 5)	/* Sleep Mode */
-#define		AT91_ADC_PENDET		(1 << 6)	/* Pen contact detection enable */
-#define		AT91_ADC_PRESCAL_9260	(0x3f << 8)	/* Prescalar Rate Selection */
-#define		AT91_ADC_PRESCAL_9G45	(0xff << 8)
-#define			AT91_ADC_PRESCAL_(x)	((x) << 8)
-#define		AT91_ADC_STARTUP_9260	(0x1f << 16)	/* Startup Up Time */
-#define		AT91_ADC_STARTUP_9G45	(0x7f << 16)
-#define		AT91_ADC_STARTUP_9X5	(0xf << 16)
-#define			AT91_ADC_STARTUP_(x)	((x) << 16)
-#define		AT91_ADC_SHTIM		(0xf  << 24)	/* Sample & Hold Time */
-#define			AT91_ADC_SHTIM_(x)	((x) << 24)
-#define		AT91_ADC_PENDBC		(0x0f << 28)	/* Pen Debounce time */
-#define			AT91_ADC_PENDBC_(x)	((x) << 28)
-
-#define AT91_ADC_TSR		0x0C
-#define		AT91_ADC_TSR_SHTIM	(0xf  << 24)	/* Sample & Hold Time */
-#define			AT91_ADC_TSR_SHTIM_(x)	((x) << 24)
-
-#define AT91_ADC_CHER		0x10		/* Channel Enable Register */
-#define AT91_ADC_CHDR		0x14		/* Channel Disable Register */
-#define AT91_ADC_CHSR		0x18		/* Channel Status Register */
-#define		AT91_ADC_CH(n)		(1 << (n))	/* Channel Number */
-
-#define AT91_ADC_SR		0x1C		/* Status Register */
-#define		AT91_ADC_EOC(n)		(1 << (n))	/* End of Conversion on Channel N */
-#define		AT91_ADC_OVRE(n)	(1 << ((n) + 8))/* Overrun Error on Channel N */
-#define		AT91_ADC_DRDY		(1 << 16)	/* Data Ready */
-#define		AT91_ADC_GOVRE		(1 << 17)	/* General Overrun Error */
-#define		AT91_ADC_ENDRX		(1 << 18)	/* End of RX Buffer */
-#define		AT91_ADC_RXFUFF		(1 << 19)	/* RX Buffer Full */
-
-#define AT91_ADC_SR_9X5		0x30		/* Status Register for 9x5 */
-#define		AT91_ADC_SR_DRDY_9X5	(1 << 24)	/* Data Ready */
-
-#define AT91_ADC_LCDR		0x20		/* Last Converted Data Register */
-#define		AT91_ADC_LDATA		(0x3ff)
-
-#define AT91_ADC_IER		0x24		/* Interrupt Enable Register */
-#define AT91_ADC_IDR		0x28		/* Interrupt Disable Register */
-#define AT91_ADC_IMR		0x2C		/* Interrupt Mask Register */
-#define		AT91RL_ADC_IER_PEN	(1 << 20)
-#define		AT91RL_ADC_IER_NOPEN	(1 << 21)
-#define		AT91_ADC_IER_PEN	(1 << 29)
-#define		AT91_ADC_IER_NOPEN	(1 << 30)
-#define		AT91_ADC_IER_XRDY	(1 << 20)
-#define		AT91_ADC_IER_YRDY	(1 << 21)
-#define		AT91_ADC_IER_PRDY	(1 << 22)
-#define		AT91_ADC_ISR_PENS	(1 << 31)
-
-#define AT91_ADC_CHR(n)		(0x30 + ((n) * 4))	/* Channel Data Register N */
-#define		AT91_ADC_DATA		(0x3ff)
-
-#define AT91_ADC_CDR0_9X5	(0x50)			/* Channel Data Register 0 for 9X5 */
-
-#define AT91_ADC_ACR		0x94	/* Analog Control Register */
-#define		AT91_ADC_ACR_PENDETSENS	(0x3 << 0)	/* pull-up resistor */
-
-#define AT91_ADC_TSMR		0xB0
-#define		AT91_ADC_TSMR_TSMODE	(3 << 0)	/* Touch Screen Mode */
-#define			AT91_ADC_TSMR_TSMODE_NONE		(0 << 0)
-#define			AT91_ADC_TSMR_TSMODE_4WIRE_NO_PRESS	(1 << 0)
-#define			AT91_ADC_TSMR_TSMODE_4WIRE_PRESS	(2 << 0)
-#define			AT91_ADC_TSMR_TSMODE_5WIRE		(3 << 0)
-#define		AT91_ADC_TSMR_TSAV	(3 << 4)	/* Averages samples */
-#define			AT91_ADC_TSMR_TSAV_(x)		((x) << 4)
-#define		AT91_ADC_TSMR_SCTIM	(0x0f << 16)	/* Switch closure time */
-#define		AT91_ADC_TSMR_PENDBC	(0x0f << 28)	/* Pen Debounce time */
-#define			AT91_ADC_TSMR_PENDBC_(x)	((x) << 28)
-#define		AT91_ADC_TSMR_NOTSDMA	(1 << 22)	/* No Touchscreen DMA */
-#define		AT91_ADC_TSMR_PENDET_DIS	(0 << 24)	/* Pen contact detection disable */
-#define		AT91_ADC_TSMR_PENDET_ENA	(1 << 24)	/* Pen contact detection enable */
-
-#define AT91_ADC_TSXPOSR	0xB4
-#define AT91_ADC_TSYPOSR	0xB8
-#define AT91_ADC_TSPRESSR	0xBC
-
-#define AT91_ADC_TRGR_9260	AT91_ADC_MR
-#define AT91_ADC_TRGR_9G45	0x08
-#define AT91_ADC_TRGR_9X5	0xC0
-
-/* Trigger Register bit field */
-#define		AT91_ADC_TRGR_TRGPER	(0xffff << 16)
-#define			AT91_ADC_TRGR_TRGPER_(x)	((x) << 16)
-#define		AT91_ADC_TRGR_TRGMOD	(0x7 << 0)
-#define			AT91_ADC_TRGR_NONE		(0 << 0)
-#define			AT91_ADC_TRGR_MOD_PERIOD_TRIG	(5 << 0)
-
-#endif
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 3e92b16e9301..c3ea34025749 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -31,7 +31,108 @@
 #include <linux/iio/trigger_consumer.h>
 #include <linux/iio/triggered_buffer.h>
 
-#include <mach/at91_adc.h>
+/* Registers */
+#define AT91_ADC_CR		0x00		/* Control Register */
+#define		AT91_ADC_SWRST		(1 << 0)	/* Software Reset */
+#define		AT91_ADC_START		(1 << 1)	/* Start Conversion */
+
+#define AT91_ADC_MR		0x04		/* Mode Register */
+#define		AT91_ADC_TSAMOD		(3 << 0)	/* ADC mode */
+#define		AT91_ADC_TSAMOD_ADC_ONLY_MODE		(0 << 0)	/* ADC Mode */
+#define		AT91_ADC_TSAMOD_TS_ONLY_MODE		(1 << 0)	/* Touch Screen Only Mode */
+#define		AT91_ADC_TRGEN		(1 << 0)	/* Trigger Enable */
+#define		AT91_ADC_TRGSEL		(7 << 1)	/* Trigger Selection */
+#define			AT91_ADC_TRGSEL_TC0		(0 << 1)
+#define			AT91_ADC_TRGSEL_TC1		(1 << 1)
+#define			AT91_ADC_TRGSEL_TC2		(2 << 1)
+#define			AT91_ADC_TRGSEL_EXTERNAL	(6 << 1)
+#define		AT91_ADC_LOWRES		(1 << 4)	/* Low Resolution */
+#define		AT91_ADC_SLEEP		(1 << 5)	/* Sleep Mode */
+#define		AT91_ADC_PENDET		(1 << 6)	/* Pen contact detection enable */
+#define		AT91_ADC_PRESCAL_9260	(0x3f << 8)	/* Prescalar Rate Selection */
+#define		AT91_ADC_PRESCAL_9G45	(0xff << 8)
+#define			AT91_ADC_PRESCAL_(x)	((x) << 8)
+#define		AT91_ADC_STARTUP_9260	(0x1f << 16)	/* Startup Up Time */
+#define		AT91_ADC_STARTUP_9G45	(0x7f << 16)
+#define		AT91_ADC_STARTUP_9X5	(0xf << 16)
+#define			AT91_ADC_STARTUP_(x)	((x) << 16)
+#define		AT91_ADC_SHTIM		(0xf  << 24)	/* Sample & Hold Time */
+#define			AT91_ADC_SHTIM_(x)	((x) << 24)
+#define		AT91_ADC_PENDBC		(0x0f << 28)	/* Pen Debounce time */
+#define			AT91_ADC_PENDBC_(x)	((x) << 28)
+
+#define AT91_ADC_TSR		0x0C
+#define		AT91_ADC_TSR_SHTIM	(0xf  << 24)	/* Sample & Hold Time */
+#define			AT91_ADC_TSR_SHTIM_(x)	((x) << 24)
+
+#define AT91_ADC_CHER		0x10		/* Channel Enable Register */
+#define AT91_ADC_CHDR		0x14		/* Channel Disable Register */
+#define AT91_ADC_CHSR		0x18		/* Channel Status Register */
+#define		AT91_ADC_CH(n)		(1 << (n))	/* Channel Number */
+
+#define AT91_ADC_SR		0x1C		/* Status Register */
+#define		AT91_ADC_EOC(n)		(1 << (n))	/* End of Conversion on Channel N */
+#define		AT91_ADC_OVRE(n)	(1 << ((n) + 8))/* Overrun Error on Channel N */
+#define		AT91_ADC_DRDY		(1 << 16)	/* Data Ready */
+#define		AT91_ADC_GOVRE		(1 << 17)	/* General Overrun Error */
+#define		AT91_ADC_ENDRX		(1 << 18)	/* End of RX Buffer */
+#define		AT91_ADC_RXFUFF		(1 << 19)	/* RX Buffer Full */
+
+#define AT91_ADC_SR_9X5		0x30		/* Status Register for 9x5 */
+#define		AT91_ADC_SR_DRDY_9X5	(1 << 24)	/* Data Ready */
+
+#define AT91_ADC_LCDR		0x20		/* Last Converted Data Register */
+#define		AT91_ADC_LDATA		(0x3ff)
+
+#define AT91_ADC_IER		0x24		/* Interrupt Enable Register */
+#define AT91_ADC_IDR		0x28		/* Interrupt Disable Register */
+#define AT91_ADC_IMR		0x2C		/* Interrupt Mask Register */
+#define		AT91RL_ADC_IER_PEN	(1 << 20)
+#define		AT91RL_ADC_IER_NOPEN	(1 << 21)
+#define		AT91_ADC_IER_PEN	(1 << 29)
+#define		AT91_ADC_IER_NOPEN	(1 << 30)
+#define		AT91_ADC_IER_XRDY	(1 << 20)
+#define		AT91_ADC_IER_YRDY	(1 << 21)
+#define		AT91_ADC_IER_PRDY	(1 << 22)
+#define		AT91_ADC_ISR_PENS	(1 << 31)
+
+#define AT91_ADC_CHR(n)		(0x30 + ((n) * 4))	/* Channel Data Register N */
+#define		AT91_ADC_DATA		(0x3ff)
+
+#define AT91_ADC_CDR0_9X5	(0x50)			/* Channel Data Register 0 for 9X5 */
+
+#define AT91_ADC_ACR		0x94	/* Analog Control Register */
+#define		AT91_ADC_ACR_PENDETSENS	(0x3 << 0)	/* pull-up resistor */
+
+#define AT91_ADC_TSMR		0xB0
+#define		AT91_ADC_TSMR_TSMODE	(3 << 0)	/* Touch Screen Mode */
+#define			AT91_ADC_TSMR_TSMODE_NONE		(0 << 0)
+#define			AT91_ADC_TSMR_TSMODE_4WIRE_NO_PRESS	(1 << 0)
+#define			AT91_ADC_TSMR_TSMODE_4WIRE_PRESS	(2 << 0)
+#define			AT91_ADC_TSMR_TSMODE_5WIRE		(3 << 0)
+#define		AT91_ADC_TSMR_TSAV	(3 << 4)	/* Averages samples */
+#define			AT91_ADC_TSMR_TSAV_(x)		((x) << 4)
+#define		AT91_ADC_TSMR_SCTIM	(0x0f << 16)	/* Switch closure time */
+#define		AT91_ADC_TSMR_PENDBC	(0x0f << 28)	/* Pen Debounce time */
+#define			AT91_ADC_TSMR_PENDBC_(x)	((x) << 28)
+#define		AT91_ADC_TSMR_NOTSDMA	(1 << 22)	/* No Touchscreen DMA */
+#define		AT91_ADC_TSMR_PENDET_DIS	(0 << 24)	/* Pen contact detection disable */
+#define		AT91_ADC_TSMR_PENDET_ENA	(1 << 24)	/* Pen contact detection enable */
+
+#define AT91_ADC_TSXPOSR	0xB4
+#define AT91_ADC_TSYPOSR	0xB8
+#define AT91_ADC_TSPRESSR	0xBC
+
+#define AT91_ADC_TRGR_9260	AT91_ADC_MR
+#define AT91_ADC_TRGR_9G45	0x08
+#define AT91_ADC_TRGR_9X5	0xC0
+
+/* Trigger Register bit field */
+#define		AT91_ADC_TRGR_TRGPER	(0xffff << 16)
+#define			AT91_ADC_TRGR_TRGPER_(x)	((x) << 16)
+#define		AT91_ADC_TRGR_TRGMOD	(0x7 << 0)
+#define			AT91_ADC_TRGR_NONE		(0 << 0)
+#define			AT91_ADC_TRGR_MOD_PERIOD_TRIG	(5 << 0)
 
 #define AT91_ADC_CHAN(st, ch) \
 	(st->registers->channel_base + (ch * 4))
-- 
1.8.3.2

[PATCH 07/15] iio: adc: at91: add sam9rl support

[Alexandre Belloni]

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 drivers/iio/adc/at91_adc.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index c3ea34025749..c47dcbaa56ef 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1343,6 +1343,20 @@ static struct at91_adc_caps at91sam9260_caps = {
 	},
 };
 
+static struct at91_adc_caps at91sam9rl_caps = {
+	.has_ts = true,
+	.calc_startup_ticks = calc_startup_ticks_9260,	/* same as 9260 */
+	.num_channels = 6,
+	.registers = {
+		.channel_base = AT91_ADC_CHR(0),
+		.drdy_mask = AT91_ADC_DRDY,
+		.status_register = AT91_ADC_SR,
+		.trigger_register = AT91_ADC_TRGR_9G45,
+		.mr_prescal_mask = AT91_ADC_PRESCAL_9260,
+		.mr_startup_mask = AT91_ADC_STARTUP_9G45,
+	},
+};
+
 static struct at91_adc_caps at91sam9g45_caps = {
 	.has_ts = true,
 	.calc_startup_ticks = calc_startup_ticks_9260,	/* same as 9260 */
@@ -1377,6 +1391,7 @@ static struct at91_adc_caps at91sam9x5_caps = {
 
 static const struct of_device_id at91_adc_dt_ids[] = {
 	{ .compatible = "atmel,at91sam9260-adc", .data = &at91sam9260_caps },
+	{ .compatible = "atmel,at91sam9rl-adc", .data = &at91sam9rl_caps },
 	{ .compatible = "atmel,at91sam9g45-adc", .data = &at91sam9g45_caps },
 	{ .compatible = "atmel,at91sam9x5-adc", .data = &at91sam9x5_caps },
 	{},
@@ -1388,6 +1403,9 @@ static const struct platform_device_id at91_adc_ids[] = {
 		.name = "at91sam9260-adc",
 		.driver_data = (unsigned long)&at91sam9260_caps,
 	}, {
+		.name = "at91sam9rl-adc",
+		.driver_data = (unsigned long)&at91sam9rl_caps,
+	}, {
 		.name = "at91sam9g45-adc",
 		.driver_data = (unsigned long)&at91sam9g45_caps,
 	}, {
-- 
1.8.3.2

[PATCH 08/15] ARM: at91: sam9rl: add at91_adc to support adc and touchscreen

[Alexandre Belloni]

The ADC clock needs to be defined to enable the at91_adc driver. It is defined
to the same speed that is used for atmel_tsadcc.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/at91sam9rl.c         |  7 +++
 arch/arm/mach-at91/at91sam9rl_devices.c | 85 +++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+)

diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c
index 3651517abedf..753ba4893836 100644
--- a/arch/arm/mach-at91/at91sam9rl.c
+++ b/arch/arm/mach-at91/at91sam9rl.c
@@ -151,6 +151,11 @@ static struct clk ac97_clk = {
 	.pmc_mask	= 1 << AT91SAM9RL_ID_AC97C,
 	.type		= CLK_TYPE_PERIPHERAL,
 };
+static struct clk adc_op_clk = {
+	.name		= "adc_op_clk",
+	.type		= CLK_TYPE_PERIPHERAL,
+	.rate_hz	= 1000000,
+};
 
 static struct clk *periph_clocks[] __initdata = {
 	&pioA_clk,
@@ -176,6 +181,7 @@ static struct clk *periph_clocks[] __initdata = {
 	&udphs_clk,
 	&lcdc_clk,
 	&ac97_clk,
+	&adc_op_clk,
 	// irq0
 };
 
@@ -196,6 +202,7 @@ static struct clk_lookup periph_clocks_lookups[] = {
 	CLKDEV_CON_ID("pioB", &pioB_clk),
 	CLKDEV_CON_ID("pioC", &pioC_clk),
 	CLKDEV_CON_ID("pioD", &pioD_clk),
+	CLKDEV_CON_ID("adc_clk", &tsc_clk),
 };
 
 static struct clk_lookup usart_clocks_lookups[] = {
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index a698bdab2cce..b836dada942c 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -22,6 +22,7 @@
 #include <mach/at91_matrix.h>
 #include <mach/at91sam9_smc.h>
 #include <linux/platform_data/dma-atmel.h>
+#include <linux/platform_data/at91_adc.h>
 
 #include "board.h"
 #include "generic.h"
@@ -656,6 +657,90 @@ void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data)
 void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) {}
 #endif
 
+/* --------------------------------------------------------------------
+ *  ADC and Touchscreen
+ * -------------------------------------------------------------------- */
+
+#if IS_ENABLED(CONFIG_AT91_ADC)
+static struct at91_adc_data adc_data;
+
+static struct resource adc_resources[] = {
+	[0] = {
+		.start	= AT91SAM9RL_BASE_TSC,
+		.end	= AT91SAM9RL_BASE_TSC + SZ_16K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= NR_IRQS_LEGACY + AT91SAM9RL_ID_TSC,
+		.end	= NR_IRQS_LEGACY + AT91SAM9RL_ID_TSC,
+		.flags	= IORESOURCE_IRQ,
+	}
+};
+
+static struct platform_device at91_adc_device = {
+	.name           = "at91sam9rl-adc",
+	.id             = -1,
+	.dev            = {
+		.platform_data  = &adc_data,
+	},
+	.resource       = adc_resources,
+	.num_resources  = ARRAY_SIZE(adc_resources),
+};
+
+static struct at91_adc_trigger at91_adc_triggers[] = {
+	[0] = {
+		.name = "external-rising",
+		.value = 1,
+		.is_external = true,
+	},
+	[1] = {
+		.name = "external-falling",
+		.value = 2,
+		.is_external = true,
+	},
+	[2] = {
+		.name = "external-any",
+		.value = 3,
+		.is_external = true,
+	},
+	[3] = {
+		.name = "continuous",
+		.value = 6,
+		.is_external = false,
+	},
+};
+
+void __init at91_add_device_adc(struct at91_adc_data *data)
+{
+	if (!data)
+		return;
+
+	if (test_bit(0, &data->channels_used))
+		at91_set_A_periph(AT91_PIN_PA17, 0);
+	if (test_bit(1, &data->channels_used))
+		at91_set_A_periph(AT91_PIN_PA18, 0);
+	if (test_bit(2, &data->channels_used))
+		at91_set_A_periph(AT91_PIN_PA19, 0);
+	if (test_bit(3, &data->channels_used))
+		at91_set_A_periph(AT91_PIN_PA20, 0);
+	if (test_bit(4, &data->channels_used))
+		at91_set_A_periph(AT91_PIN_PD6, 0);
+	if (test_bit(5, &data->channels_used))
+		at91_set_A_periph(AT91_PIN_PD7, 0);
+
+	if (data->use_external_triggers)
+		at91_set_A_periph(AT91_PIN_PB15, 0);
+
+	data->startup_time = 40;
+	data->trigger_number = 4;
+	data->trigger_list = at91_adc_triggers;
+
+	adc_data = *data;
+	platform_device_register(&at91_adc_device);
+}
+#else
+void __init at91_add_device_adc(struct at91_adc_data *data) {}
+#endif
 
 /* --------------------------------------------------------------------
  *  RTC
-- 
1.8.3.2

[PATCH 09/15] ARM: at91: sam9rlek add touchscreen support through at91_adc

[Alexandre Belloni]

at91_adc now supports reading a touchscreen for ADCs without a TSMR register.
Enable touchscreen support through at91_adc. This allows to use both a
touchscreen and the remaining ADC channel at the same time.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/board-sam9rlek.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/mach-at91/board-sam9rlek.c b/arch/arm/mach-at91/board-sam9rlek.c
index 604eecf6cd70..35d420247e25 100644
--- a/arch/arm/mach-at91/board-sam9rlek.c
+++ b/arch/arm/mach-at91/board-sam9rlek.c
@@ -18,6 +18,7 @@
 #include <linux/clk.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
+#include <linux/platform_data/at91_adc.h>
 
 #include <video/atmel_lcdc.h>
 
@@ -239,6 +240,17 @@ static struct at91_tsadcc_data ek_tsadcc_data = {
 
 
 /*
+ * ADC + Touchscreen
+ */
+static struct at91_adc_data ek_adc_data = {
+	.channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5),
+	.use_external_triggers = true,
+	.vref = 3300,
+	.touchscreen_type = ATMEL_ADC_TOUCHSCREEN_4WIRE,
+};
+
+
+/*
  * GPIO Buttons
  */
 #if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
@@ -312,6 +324,8 @@ static void __init ek_board_init(void)
 	at91_add_device_ac97(&ek_ac97_data);
 	/* Touch Screen Controller */
 	at91_add_device_tsadcc(&ek_tsadcc_data);
+	/* Touch Screen Controller + ADC */
+	at91_add_device_adc(&ek_adc_data);
 	/* LEDs */
 	at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
 	/* Push Buttons */
-- 
1.8.3.2

[PATCH 10/15] ARM: at91: sam9g45: switch from atmel_tsadcc to at91_adc

[Alexandre Belloni]

atmel_tsadcc is not allowing to use the remaining ADC channels while at91_adc
does. Completely switch to at91_adc and remove the tsadcc platform_data for
at91sam9g45 and at91sam9g45 based boards.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/configs/at91sam9g45_defconfig   |  3 +-
 arch/arm/mach-at91/at91sam9g45_devices.c | 53 +-------------------------------
 arch/arm/mach-at91/board-sam9m10g45ek.c  | 15 ++-------
 3 files changed, 5 insertions(+), 66 deletions(-)

diff --git a/arch/arm/configs/at91sam9g45_defconfig b/arch/arm/configs/at91sam9g45_defconfig
index e181a50fd65a..c6661a60025d 100644
--- a/arch/arm/configs/at91sam9g45_defconfig
+++ b/arch/arm/configs/at91sam9g45_defconfig
@@ -83,7 +83,6 @@ CONFIG_KEYBOARD_GPIO=y
 # CONFIG_INPUT_MOUSE is not set
 CONFIG_INPUT_TOUCHSCREEN=y
 CONFIG_TOUCHSCREEN_ATMEL_MXT=m
-CONFIG_TOUCHSCREEN_ATMEL_TSADCC=y
 # CONFIG_SERIO is not set
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_ATMEL=y
@@ -146,6 +145,8 @@ CONFIG_DMADEVICES=y
 CONFIG_AT_HDMAC=y
 CONFIG_DMATEST=m
 # CONFIG_IOMMU_SUPPORT is not set
+CONFIG_IIO=y
+CONFIG_AT91_ADC=y
 CONFIG_EXT4_FS=y
 CONFIG_FANOTIFY=y
 CONFIG_VFAT_FS=y
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index cd36009c3511..87135a61357d 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -1131,58 +1131,7 @@ static void __init at91_add_device_rtc(void) {}
 
 
 /* --------------------------------------------------------------------
- *  Touchscreen
- * -------------------------------------------------------------------- */
-
-#if defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) || defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC_MODULE)
-static u64 tsadcc_dmamask = DMA_BIT_MASK(32);
-static struct at91_tsadcc_data tsadcc_data;
-
-static struct resource tsadcc_resources[] = {
-	[0] = {
-		.start	= AT91SAM9G45_BASE_TSC,
-		.end	= AT91SAM9G45_BASE_TSC + SZ_16K - 1,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= NR_IRQS_LEGACY + AT91SAM9G45_ID_TSC,
-		.end	= NR_IRQS_LEGACY + AT91SAM9G45_ID_TSC,
-		.flags	= IORESOURCE_IRQ,
-	}
-};
-
-static struct platform_device at91sam9g45_tsadcc_device = {
-	.name		= "atmel_tsadcc",
-	.id		= -1,
-	.dev		= {
-				.dma_mask		= &tsadcc_dmamask,
-				.coherent_dma_mask	= DMA_BIT_MASK(32),
-				.platform_data		= &tsadcc_data,
-	},
-	.resource	= tsadcc_resources,
-	.num_resources	= ARRAY_SIZE(tsadcc_resources),
-};
-
-void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data)
-{
-	if (!data)
-		return;
-
-	at91_set_gpio_input(AT91_PIN_PD20, 0);	/* AD0_XR */
-	at91_set_gpio_input(AT91_PIN_PD21, 0);	/* AD1_XL */
-	at91_set_gpio_input(AT91_PIN_PD22, 0);	/* AD2_YT */
-	at91_set_gpio_input(AT91_PIN_PD23, 0);	/* AD3_TB */
-
-	tsadcc_data = *data;
-	platform_device_register(&at91sam9g45_tsadcc_device);
-}
-#else
-void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) {}
-#endif
-
-
-/* --------------------------------------------------------------------
- *  ADC
+ *  ADC and touchscreen
  * -------------------------------------------------------------------- */
 
 #if IS_ENABLED(CONFIG_AT91_ADC)
diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
index 4d775b796ce4..f2f7ce9643ce 100644
--- a/arch/arm/mach-at91/board-sam9m10g45ek.c
+++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
@@ -300,16 +300,7 @@ static struct atmel_lcdfb_pdata __initdata ek_lcdc_data;
 
 
 /*
- * Touchscreen
- */
-static struct at91_tsadcc_data ek_tsadcc_data = {
-	.adc_clock		= 300000,
-	.pendet_debounce	= 0x0d,
-	.ts_sample_hold_time	= 0x0a,
-};
-
-/*
- * ADCs
+ * ADCs and touchscreen
  */
 static struct at91_adc_data ek_adc_data = {
 	.channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7),
@@ -486,9 +477,7 @@ static void __init ek_board_init(void)
 	at91_add_device_isi(&isi_data, true);
 	/* LCD Controller */
 	at91_add_device_lcdc(&ek_lcdc_data);
-	/* Touch Screen */
-	at91_add_device_tsadcc(&ek_tsadcc_data);
-	/* ADC */
+	/* ADC and touchscreen */
 	at91_add_device_adc(&ek_adc_data);
 	/* Push Buttons */
 	ek_add_device_buttons();
-- 
1.8.3.2

[PATCH 11/15] ARM: at91: sam9rl: switch from atmel_tsadcc to at91_adc

[Alexandre Belloni]

atmel_tsadcc is not allowing to use the remaining ADC channels while at91_adc
does. Completely switch to at91_adc and remove the tsadcc platform_data for
at91sam9rl and at91sam9rl based boards.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/configs/at91sam9rl_defconfig   |  3 +-
 arch/arm/mach-at91/at91sam9rl_devices.c | 50 ---------------------------------
 arch/arm/mach-at91/board-sam9rlek.c     | 12 --------
 3 files changed, 2 insertions(+), 63 deletions(-)

diff --git a/arch/arm/configs/at91sam9rl_defconfig b/arch/arm/configs/at91sam9rl_defconfig
index 85f846ae9ff2..5d7797d43d23 100644
--- a/arch/arm/configs/at91sam9rl_defconfig
+++ b/arch/arm/configs/at91sam9rl_defconfig
@@ -45,7 +45,6 @@ CONFIG_INPUT_EVDEV=y
 # CONFIG_INPUT_KEYBOARD is not set
 # CONFIG_INPUT_MOUSE is not set
 CONFIG_INPUT_TOUCHSCREEN=y
-CONFIG_TOUCHSCREEN_ATMEL_TSADCC=y
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_ATMEL=y
 CONFIG_SERIAL_ATMEL_CONSOLE=y
@@ -65,6 +64,8 @@ CONFIG_MMC=y
 CONFIG_MMC_ATMELMCI=m
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_AT91SAM9=y
+CONFIG_IIO=y
+CONFIG_AT91_ADC=y
 CONFIG_EXT2_FS=y
 CONFIG_MSDOS_FS=y
 CONFIG_VFAT_FS=y
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index b836dada942c..9ccae034119c 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -608,56 +608,6 @@ static void __init at91_add_device_tc(void) { }
 
 
 /* --------------------------------------------------------------------
- *  Touchscreen
- * -------------------------------------------------------------------- */
-
-#if defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) || defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC_MODULE)
-static u64 tsadcc_dmamask = DMA_BIT_MASK(32);
-static struct at91_tsadcc_data tsadcc_data;
-
-static struct resource tsadcc_resources[] = {
-	[0] = {
-		.start	= AT91SAM9RL_BASE_TSC,
-		.end	= AT91SAM9RL_BASE_TSC + SZ_16K - 1,
-		.flags	= IORESOURCE_MEM,
-	},
-	[1] = {
-		.start	= NR_IRQS_LEGACY + AT91SAM9RL_ID_TSC,
-		.end	= NR_IRQS_LEGACY + AT91SAM9RL_ID_TSC,
-		.flags	= IORESOURCE_IRQ,
-	}
-};
-
-static struct platform_device at91sam9rl_tsadcc_device = {
-	.name		= "atmel_tsadcc",
-	.id		= -1,
-	.dev		= {
-				.dma_mask		= &tsadcc_dmamask,
-				.coherent_dma_mask	= DMA_BIT_MASK(32),
-				.platform_data		= &tsadcc_data,
-	},
-	.resource	= tsadcc_resources,
-	.num_resources	= ARRAY_SIZE(tsadcc_resources),
-};
-
-void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data)
-{
-	if (!data)
-		return;
-
-	at91_set_A_periph(AT91_PIN_PA17, 0);	/* AD0_XR */
-	at91_set_A_periph(AT91_PIN_PA18, 0);	/* AD1_XL */
-	at91_set_A_periph(AT91_PIN_PA19, 0);	/* AD2_YT */
-	at91_set_A_periph(AT91_PIN_PA20, 0);	/* AD3_TB */
-
-	tsadcc_data = *data;
-	platform_device_register(&at91sam9rl_tsadcc_device);
-}
-#else
-void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) {}
-#endif
-
-/* --------------------------------------------------------------------
  *  ADC and Touchscreen
  * -------------------------------------------------------------------- */
 
diff --git a/arch/arm/mach-at91/board-sam9rlek.c b/arch/arm/mach-at91/board-sam9rlek.c
index 35d420247e25..6ae90e312ce0 100644
--- a/arch/arm/mach-at91/board-sam9rlek.c
+++ b/arch/arm/mach-at91/board-sam9rlek.c
@@ -230,16 +230,6 @@ static struct gpio_led ek_leds[] = {
 
 
 /*
- * Touchscreen
- */
-static struct at91_tsadcc_data ek_tsadcc_data = {
-	.adc_clock		= 1000000,
-	.pendet_debounce	= 0x0f,
-	.ts_sample_hold_time	= 0x03,
-};
-
-
-/*
  * ADC + Touchscreen
  */
 static struct at91_adc_data ek_adc_data = {
@@ -322,8 +312,6 @@ static void __init ek_board_init(void)
 	at91_add_device_lcdc(&ek_lcdc_data);
 	/* AC97 */
 	at91_add_device_ac97(&ek_ac97_data);
-	/* Touch Screen Controller */
-	at91_add_device_tsadcc(&ek_tsadcc_data);
 	/* Touch Screen Controller + ADC */
 	at91_add_device_adc(&ek_adc_data);
 	/* LEDs */
-- 
1.8.3.2

[PATCH 12/15] ARM: at91: remove atmel_tsadcc platform_data

[Alexandre Belloni]

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 arch/arm/mach-at91/board.h          | 3 ---
 include/linux/platform_data/atmel.h | 7 -------
 2 files changed, 10 deletions(-)

diff --git a/arch/arm/mach-at91/board.h b/arch/arm/mach-at91/board.h
index 6c08b341167d..4e773b55bc2d 100644
--- a/arch/arm/mach-at91/board.h
+++ b/arch/arm/mach-at91/board.h
@@ -118,9 +118,6 @@ struct isi_platform_data;
 extern void __init at91_add_device_isi(struct isi_platform_data *data,
 		bool use_pck_as_mck);
 
- /* Touchscreen Controller */
-extern void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data);
-
 /* CAN */
 extern void __init at91_add_device_can(struct at91_can_data *data);
 
diff --git a/include/linux/platform_data/atmel.h b/include/linux/platform_data/atmel.h
index cea9f70133c5..4b452c6a2f7b 100644
--- a/include/linux/platform_data/atmel.h
+++ b/include/linux/platform_data/atmel.h
@@ -86,13 +86,6 @@ struct atmel_uart_data {
 	struct serial_rs485	rs485;		/* rs485 settings */
 };
 
- /* Touchscreen Controller */
-struct at91_tsadcc_data {
-	unsigned int    adc_clock;
-	u8		pendet_debounce;
-	u8		ts_sample_hold_time;
-};
-
 /* CAN */
 struct at91_can_data {
 	void (*transceiver_switch)(int on);
-- 
1.8.3.2

[PATCH 13/15] ARM: at91: remove atmel_tsadcc from sama5_defconfig

[Alexandre Belloni]

atmel_tsadcc has been removed, stop selecting it.

Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
---
 arch/arm/configs/sama5_defconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/configs/sama5_defconfig b/arch/arm/configs/sama5_defconfig
index dc3881e07630..869fa18ebeb2 100644
--- a/arch/arm/configs/sama5_defconfig
+++ b/arch/arm/configs/sama5_defconfig
@@ -122,7 +122,6 @@ CONFIG_KEYBOARD_GPIO=y
 # CONFIG_INPUT_MOUSE is not set
 CONFIG_INPUT_TOUCHSCREEN=y
 CONFIG_TOUCHSCREEN_ATMEL_MXT=y
-CONFIG_TOUCHSCREEN_ATMEL_TSADCC=y
 # CONFIG_SERIO is not set
 CONFIG_LEGACY_PTY_COUNT=4
 CONFIG_SERIAL_ATMEL=y
-- 
1.8.3.2

[PATCH 14/15] Input: atmel_tsadcc: remove driver

[Alexandre Belloni]

The atmel_tsadcc driver is not used anymore, it has been replaced by at91_adc so
remove it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
 MAINTAINERS                              |   6 -
 drivers/input/touchscreen/Kconfig        |  12 --
 drivers/input/touchscreen/Makefile       |   1 -
 drivers/input/touchscreen/atmel_tsadcc.c | 358 -------------------------------
 4 files changed, 377 deletions(-)
 delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c

diff --git a/MAINTAINERS b/MAINTAINERS
index c6d0e93eff62..134dd63dfa17 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1591,12 +1591,6 @@ S:	Supported
 F:	drivers/misc/atmel_tclib.c
 F:	drivers/clocksource/tcb_clksrc.c
 
-ATMEL TSADCC DRIVER
-M:	Josh Wu <josh.wu@atmel.com>
-L:	linux-input@vger.kernel.org
-S:	Supported
-F:	drivers/input/touchscreen/atmel_tsadcc.c
-
 ATMEL USBA UDC DRIVER
 M:	Nicolas Ferre <nicolas.ferre@atmel.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 07e9e82029d1..4090f69e78af 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -559,18 +559,6 @@ config TOUCHSCREEN_TI_AM335X_TSC
 	  To compile this driver as a module, choose M here: the
 	  module will be called ti_am335x_tsc.
 
-config TOUCHSCREEN_ATMEL_TSADCC
-	tristate "Atmel Touchscreen Interface"
-	depends on ARCH_AT91
-	help
-	  Say Y here if you have a 4-wire touchscreen connected to the
-          ADC Controller on your Atmel SoC.
-
-	  If unsure, say N.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called atmel_tsadcc.
-
 config TOUCHSCREEN_UCB1400
 	tristate "Philips UCB1400 touchscreen"
 	depends on AC97_BUS
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 62801f213346..f326a8290593 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -13,7 +13,6 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C)	+= ad7879-i2c.o
 obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI)	+= ad7879-spi.o
 obj-$(CONFIG_TOUCHSCREEN_ADS7846)	+= ads7846.o
 obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT)	+= atmel_mxt_ts.o
-obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)	+= atmel_tsadcc.o
 obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR)	+= auo-pixcir-ts.o
 obj-$(CONFIG_TOUCHSCREEN_BU21013)	+= bu21013_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
diff --git a/drivers/input/touchscreen/atmel_tsadcc.c b/drivers/input/touchscreen/atmel_tsadcc.c
deleted file mode 100644
index a7c9d6967d1e..000000000000
--- a/drivers/input/touchscreen/atmel_tsadcc.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- *  Atmel Touch Screen Driver
- *
- *  Copyright (c) 2008 ATMEL
- *  Copyright (c) 2008 Dan Liang
- *  Copyright (c) 2008 TimeSys Corporation
- *  Copyright (c) 2008 Justin Waters
- *
- *  Based on touchscreen code from Atmel Corporation.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- */
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/input.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/platform_data/atmel.h>
-#include <mach/cpu.h>
-
-/* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */
-
-#define ATMEL_TSADCC_CR		0x00	/* Control register */
-#define   ATMEL_TSADCC_SWRST	(1 << 0)	/* Software Reset*/
-#define	  ATMEL_TSADCC_START	(1 << 1)	/* Start conversion */
-
-#define ATMEL_TSADCC_MR		0x04	/* Mode register */
-#define	  ATMEL_TSADCC_TSAMOD	(3    <<  0)	/* ADC mode */
-#define	    ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE	(0x0)	/* ADC Mode */
-#define	    ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE	(0x1)	/* Touch Screen Only Mode */
-#define	  ATMEL_TSADCC_LOWRES	(1    <<  4)	/* Resolution selection */
-#define	  ATMEL_TSADCC_SLEEP	(1    <<  5)	/* Sleep mode */
-#define	  ATMEL_TSADCC_PENDET	(1    <<  6)	/* Pen Detect selection */
-#define	  ATMEL_TSADCC_PRES	(1    <<  7)	/* Pressure Measurement Selection */
-#define	  ATMEL_TSADCC_PRESCAL	(0x3f <<  8)	/* Prescalar Rate Selection */
-#define	  ATMEL_TSADCC_EPRESCAL	(0xff <<  8)	/* Prescalar Rate Selection (Extended) */
-#define	  ATMEL_TSADCC_STARTUP	(0x7f << 16)	/* Start Up time */
-#define	  ATMEL_TSADCC_SHTIM	(0xf  << 24)	/* Sample & Hold time */
-#define	  ATMEL_TSADCC_PENDBC	(0xf  << 28)	/* Pen Detect debouncing time */
-
-#define ATMEL_TSADCC_TRGR	0x08	/* Trigger register */
-#define	  ATMEL_TSADCC_TRGMOD	(7      <<  0)	/* Trigger mode */
-#define	    ATMEL_TSADCC_TRGMOD_NONE		(0 << 0)
-#define     ATMEL_TSADCC_TRGMOD_EXT_RISING	(1 << 0)
-#define     ATMEL_TSADCC_TRGMOD_EXT_FALLING	(2 << 0)
-#define     ATMEL_TSADCC_TRGMOD_EXT_ANY		(3 << 0)
-#define     ATMEL_TSADCC_TRGMOD_PENDET		(4 << 0)
-#define     ATMEL_TSADCC_TRGMOD_PERIOD		(5 << 0)
-#define     ATMEL_TSADCC_TRGMOD_CONTINUOUS	(6 << 0)
-#define   ATMEL_TSADCC_TRGPER	(0xffff << 16)	/* Trigger period */
-
-#define ATMEL_TSADCC_TSR	0x0C	/* Touch Screen register */
-#define	  ATMEL_TSADCC_TSFREQ	(0xf <<  0)	/* TS Frequency in Interleaved mode */
-#define	  ATMEL_TSADCC_TSSHTIM	(0xf << 24)	/* Sample & Hold time */
-
-#define ATMEL_TSADCC_CHER	0x10	/* Channel Enable register */
-#define ATMEL_TSADCC_CHDR	0x14	/* Channel Disable register */
-#define ATMEL_TSADCC_CHSR	0x18	/* Channel Status register */
-#define	  ATMEL_TSADCC_CH(n)	(1 << (n))	/* Channel number */
-
-#define ATMEL_TSADCC_SR		0x1C	/* Status register */
-#define	  ATMEL_TSADCC_EOC(n)	(1 << ((n)+0))	/* End of conversion for channel N */
-#define	  ATMEL_TSADCC_OVRE(n)	(1 << ((n)+8))	/* Overrun error for channel N */
-#define	  ATMEL_TSADCC_DRDY	(1 << 16)	/* Data Ready */
-#define	  ATMEL_TSADCC_GOVRE	(1 << 17)	/* General Overrun Error */
-#define	  ATMEL_TSADCC_ENDRX	(1 << 18)	/* End of RX Buffer */
-#define	  ATMEL_TSADCC_RXBUFF	(1 << 19)	/* TX Buffer full */
-#define	  ATMEL_TSADCC_PENCNT	(1 << 20)	/* Pen contact */
-#define	  ATMEL_TSADCC_NOCNT	(1 << 21)	/* No contact */
-
-#define ATMEL_TSADCC_LCDR	0x20	/* Last Converted Data register */
-#define	  ATMEL_TSADCC_DATA	(0x3ff << 0)	/* Channel data */
-
-#define ATMEL_TSADCC_IER	0x24	/* Interrupt Enable register */
-#define ATMEL_TSADCC_IDR	0x28	/* Interrupt Disable register */
-#define ATMEL_TSADCC_IMR	0x2C	/* Interrupt Mask register */
-#define ATMEL_TSADCC_CDR0	0x30	/* Channel Data 0 */
-#define ATMEL_TSADCC_CDR1	0x34	/* Channel Data 1 */
-#define ATMEL_TSADCC_CDR2	0x38	/* Channel Data 2 */
-#define ATMEL_TSADCC_CDR3	0x3C	/* Channel Data 3 */
-#define ATMEL_TSADCC_CDR4	0x40	/* Channel Data 4 */
-#define ATMEL_TSADCC_CDR5	0x44	/* Channel Data 5 */
-
-#define ATMEL_TSADCC_XPOS	0x50
-#define ATMEL_TSADCC_Z1DAT	0x54
-#define ATMEL_TSADCC_Z2DAT	0x58
-
-#define PRESCALER_VAL(x)	((x) >> 8)
-
-#define ADC_DEFAULT_CLOCK	100000
-
-struct atmel_tsadcc {
-	struct input_dev	*input;
-	char			phys[32];
-	struct clk		*clk;
-	int			irq;
-	unsigned int		prev_absx;
-	unsigned int		prev_absy;
-	unsigned char		bufferedmeasure;
-};
-
-static void __iomem		*tsc_base;
-
-#define atmel_tsadcc_read(reg)		__raw_readl(tsc_base + (reg))
-#define atmel_tsadcc_write(reg, val)	__raw_writel((val), tsc_base + (reg))
-
-static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev)
-{
-	struct atmel_tsadcc	*ts_dev = (struct atmel_tsadcc *)dev;
-	struct input_dev	*input_dev = ts_dev->input;
-
-	unsigned int status;
-	unsigned int reg;
-
-	status = atmel_tsadcc_read(ATMEL_TSADCC_SR);
-	status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR);
-
-	if (status & ATMEL_TSADCC_NOCNT) {
-		/* Contact lost */
-		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC;
-
-		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
-		atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
-		atmel_tsadcc_write(ATMEL_TSADCC_IDR,
-				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
-		atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
-
-		input_report_key(input_dev, BTN_TOUCH, 0);
-		ts_dev->bufferedmeasure = 0;
-		input_sync(input_dev);
-
-	} else if (status & ATMEL_TSADCC_PENCNT) {
-		/* Pen detected */
-		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR);
-		reg &= ~ATMEL_TSADCC_PENDBC;
-
-		atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT);
-		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
-		atmel_tsadcc_write(ATMEL_TSADCC_IER,
-				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
-		atmel_tsadcc_write(ATMEL_TSADCC_TRGR,
-				   ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16));
-
-	} else if (status & ATMEL_TSADCC_EOC(3)) {
-		/* Conversion finished */
-
-		if (ts_dev->bufferedmeasure) {
-			/* Last measurement is always discarded, since it can
-			 * be erroneous.
-			 * Always report previous measurement */
-			input_report_abs(input_dev, ABS_X, ts_dev->prev_absx);
-			input_report_abs(input_dev, ABS_Y, ts_dev->prev_absy);
-			input_report_key(input_dev, BTN_TOUCH, 1);
-			input_sync(input_dev);
-		} else
-			ts_dev->bufferedmeasure = 1;
-
-		/* Now make new measurement */
-		ts_dev->prev_absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10;
-		ts_dev->prev_absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2);
-
-		ts_dev->prev_absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10;
-		ts_dev->prev_absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0);
-	}
-
-	return IRQ_HANDLED;
-}
-
-/*
- * The functions for inserting/removing us as a module.
- */
-
-static int atmel_tsadcc_probe(struct platform_device *pdev)
-{
-	struct atmel_tsadcc	*ts_dev;
-	struct input_dev	*input_dev;
-	struct resource		*res;
-	struct at91_tsadcc_data *pdata = dev_get_platdata(&pdev->dev);
-	int		err;
-	unsigned int	prsc;
-	unsigned int	reg;
-
-	if (!pdata)
-		return -EINVAL;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "no mmio resource defined.\n");
-		return -ENXIO;
-	}
-
-	/* Allocate memory for device */
-	ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL);
-	if (!ts_dev) {
-		dev_err(&pdev->dev, "failed to allocate memory.\n");
-		return -ENOMEM;
-	}
-	platform_set_drvdata(pdev, ts_dev);
-
-	input_dev = input_allocate_device();
-	if (!input_dev) {
-		dev_err(&pdev->dev, "failed to allocate input device.\n");
-		err = -EBUSY;
-		goto err_free_mem;
-	}
-
-	ts_dev->irq = platform_get_irq(pdev, 0);
-	if (ts_dev->irq < 0) {
-		dev_err(&pdev->dev, "no irq ID is designated.\n");
-		err = -ENODEV;
-		goto err_free_dev;
-	}
-
-	if (!request_mem_region(res->start, resource_size(res),
-				"atmel tsadcc regs")) {
-		dev_err(&pdev->dev, "resources is unavailable.\n");
-		err = -EBUSY;
-		goto err_free_dev;
-	}
-
-	tsc_base = ioremap(res->start, resource_size(res));
-	if (!tsc_base) {
-		dev_err(&pdev->dev, "failed to map registers.\n");
-		err = -ENOMEM;
-		goto err_release_mem;
-	}
-
-	err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, 0,
-			pdev->dev.driver->name, ts_dev);
-	if (err) {
-		dev_err(&pdev->dev, "failed to allocate irq.\n");
-		goto err_unmap_regs;
-	}
-
-	ts_dev->clk = clk_get(&pdev->dev, "tsc_clk");
-	if (IS_ERR(ts_dev->clk)) {
-		dev_err(&pdev->dev, "failed to get ts_clk\n");
-		err = PTR_ERR(ts_dev->clk);
-		goto err_free_irq;
-	}
-
-	ts_dev->input = input_dev;
-	ts_dev->bufferedmeasure = 0;
-
-	snprintf(ts_dev->phys, sizeof(ts_dev->phys),
-		 "%s/input0", dev_name(&pdev->dev));
-
-	input_dev->name = "atmel touch screen controller";
-	input_dev->phys = ts_dev->phys;
-	input_dev->dev.parent = &pdev->dev;
-
-	__set_bit(EV_ABS, input_dev->evbit);
-	input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0);
-
-	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
-
-	/* clk_enable() always returns 0, no need to check it */
-	clk_enable(ts_dev->clk);
-
-	prsc = clk_get_rate(ts_dev->clk);
-	dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc);
-
-	if (!pdata->adc_clock)
-		pdata->adc_clock = ADC_DEFAULT_CLOCK;
-
-	prsc = (prsc / (2 * pdata->adc_clock)) - 1;
-
-	/* saturate if this value is too high */
-	if (cpu_is_at91sam9rl()) {
-		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_PRESCAL))
-			prsc = PRESCALER_VAL(ATMEL_TSADCC_PRESCAL);
-	} else {
-		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL))
-			prsc = PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL);
-	}
-
-	dev_info(&pdev->dev, "Prescaler is set at: %d\n", prsc);
-
-	reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE		|
-		((0x00 << 5) & ATMEL_TSADCC_SLEEP)	|	/* Normal Mode */
-		((0x01 << 6) & ATMEL_TSADCC_PENDET)	|	/* Enable Pen Detect */
-		(prsc << 8)				|
-		((0x26 << 16) & ATMEL_TSADCC_STARTUP)	|
-		((pdata->pendet_debounce << 28) & ATMEL_TSADCC_PENDBC);
-
-	atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST);
-	atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
-	atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
-	atmel_tsadcc_write(ATMEL_TSADCC_TSR,
-		(pdata->ts_sample_hold_time << 24) & ATMEL_TSADCC_TSSHTIM);
-
-	atmel_tsadcc_read(ATMEL_TSADCC_SR);
-	atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
-
-	/* All went ok, so register to the input system */
-	err = input_register_device(input_dev);
-	if (err)
-		goto err_fail;
-
-	return 0;
-
-err_fail:
-	clk_disable(ts_dev->clk);
-	clk_put(ts_dev->clk);
-err_free_irq:
-	free_irq(ts_dev->irq, ts_dev);
-err_unmap_regs:
-	iounmap(tsc_base);
-err_release_mem:
-	release_mem_region(res->start, resource_size(res));
-err_free_dev:
-	input_free_device(input_dev);
-err_free_mem:
-	kfree(ts_dev);
-	return err;
-}
-
-static int atmel_tsadcc_remove(struct platform_device *pdev)
-{
-	struct atmel_tsadcc *ts_dev = platform_get_drvdata(pdev);
-	struct resource *res;
-
-	free_irq(ts_dev->irq, ts_dev);
-
-	input_unregister_device(ts_dev->input);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	iounmap(tsc_base);
-	release_mem_region(res->start, resource_size(res));
-
-	clk_disable(ts_dev->clk);
-	clk_put(ts_dev->clk);
-
-	kfree(ts_dev);
-
-	return 0;
-}
-
-static struct platform_driver atmel_tsadcc_driver = {
-	.probe		= atmel_tsadcc_probe,
-	.remove		= atmel_tsadcc_remove,
-	.driver		= {
-		.name	= "atmel_tsadcc",
-	},
-};
-module_platform_driver(atmel_tsadcc_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Atmel TouchScreen Driver");
-MODULE_AUTHOR("Dan Liang <dan.liang@atmel.com>");
-
-- 
1.8.3.2

[PATCH 15/15] ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node

[Alexandre Belloni]

The tsadcc node is useless as it doesn't refer to anything and the touchscreen
is handled by the adc0 node.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Rodolfo Giometti <giometti@linux.it>
---
 arch/arm/boot/dts/at91-cosino_mega2560.dts | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/arm/boot/dts/at91-cosino_mega2560.dts b/arch/arm/boot/dts/at91-cosino_mega2560.dts
index f9415dd11f17..cce621239b72 100644
--- a/arch/arm/boot/dts/at91-cosino_mega2560.dts
+++ b/arch/arm/boot/dts/at91-cosino_mega2560.dts
@@ -33,11 +33,6 @@
 				status = "okay";
 			};
 
-
-			tsadcc: tsadcc@f804c000 {
-				status = "okay";
-			};
-
 			rtc@fffffeb0 {
 				status = "okay";
 			};
-- 
1.8.3.2

Re: [PATCH 04/15] iio: adc: at91_adc: Add support for touchscreens without TSMR

[Thomas Petazzoni]

Dear Alexandre Belloni,

On Wed,  5 Mar 2014 18:35:29 +0100, Alexandre Belloni wrote:

> -static irqreturn_t at91_adc_interrupt(int irq, void *private)
> +void handle_adc_rl_ts_irq(int irq, struct at91_adc_state *st, u32 status)

I believe this function,

> +void handle_adc_9x5_ts_irq(int irq, struct at91_adc_state *st, u32 status)

and this one should be 'static'.

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Re: [PATCH 14/15] Input: atmel_tsadcc: remove driver

[Dmitry Torokhov]

On Wed, Mar 05, 2014 at 06:35:39PM +0100, Alexandre Belloni wrote:
> The atmel_tsadcc driver is not used anymore, it has been replaced by at91_adc so
> remove it.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

> ---
>  MAINTAINERS                              |   6 -
>  drivers/input/touchscreen/Kconfig        |  12 --
>  drivers/input/touchscreen/Makefile       |   1 -
>  drivers/input/touchscreen/atmel_tsadcc.c | 358 -------------------------------
>  4 files changed, 377 deletions(-)
>  delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index c6d0e93eff62..134dd63dfa17 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1591,12 +1591,6 @@ S:	Supported
>  F:	drivers/misc/atmel_tclib.c
>  F:	drivers/clocksource/tcb_clksrc.c
>  
> -ATMEL TSADCC DRIVER
> -M:	Josh Wu <josh.wu@atmel.com>
> -L:	linux-input@vger.kernel.org
> -S:	Supported
> -F:	drivers/input/touchscreen/atmel_tsadcc.c
> -
>  ATMEL USBA UDC DRIVER
>  M:	Nicolas Ferre <nicolas.ferre@atmel.com>
>  L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 07e9e82029d1..4090f69e78af 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -559,18 +559,6 @@ config TOUCHSCREEN_TI_AM335X_TSC
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called ti_am335x_tsc.
>  
> -config TOUCHSCREEN_ATMEL_TSADCC
> -	tristate "Atmel Touchscreen Interface"
> -	depends on ARCH_AT91
> -	help
> -	  Say Y here if you have a 4-wire touchscreen connected to the
> -          ADC Controller on your Atmel SoC.
> -
> -	  If unsure, say N.
> -
> -	  To compile this driver as a module, choose M here: the
> -	  module will be called atmel_tsadcc.
> -
>  config TOUCHSCREEN_UCB1400
>  	tristate "Philips UCB1400 touchscreen"
>  	depends on AC97_BUS
> diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
> index 62801f213346..f326a8290593 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -13,7 +13,6 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C)	+= ad7879-i2c.o
>  obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI)	+= ad7879-spi.o
>  obj-$(CONFIG_TOUCHSCREEN_ADS7846)	+= ads7846.o
>  obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT)	+= atmel_mxt_ts.o
> -obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)	+= atmel_tsadcc.o
>  obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR)	+= auo-pixcir-ts.o
>  obj-$(CONFIG_TOUCHSCREEN_BU21013)	+= bu21013_ts.o
>  obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
> diff --git a/drivers/input/touchscreen/atmel_tsadcc.c b/drivers/input/touchscreen/atmel_tsadcc.c
> deleted file mode 100644
> index a7c9d6967d1e..000000000000
> --- a/drivers/input/touchscreen/atmel_tsadcc.c
> +++ /dev/null
> @@ -1,358 +0,0 @@
> -/*
> - *  Atmel Touch Screen Driver
> - *
> - *  Copyright (c) 2008 ATMEL
> - *  Copyright (c) 2008 Dan Liang
> - *  Copyright (c) 2008 TimeSys Corporation
> - *  Copyright (c) 2008 Justin Waters
> - *
> - *  Based on touchscreen code from Atmel Corporation.
> - *
> - *  This program is free software; you can redistribute it and/or modify
> - *  it under the terms of the GNU General Public License version 2 as
> - *  published by the Free Software Foundation.
> - */
> -#include <linux/err.h>
> -#include <linux/kernel.h>
> -#include <linux/module.h>
> -#include <linux/input.h>
> -#include <linux/slab.h>
> -#include <linux/interrupt.h>
> -#include <linux/clk.h>
> -#include <linux/platform_device.h>
> -#include <linux/io.h>
> -#include <linux/platform_data/atmel.h>
> -#include <mach/cpu.h>
> -
> -/* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */
> -
> -#define ATMEL_TSADCC_CR		0x00	/* Control register */
> -#define   ATMEL_TSADCC_SWRST	(1 << 0)	/* Software Reset*/
> -#define	  ATMEL_TSADCC_START	(1 << 1)	/* Start conversion */
> -
> -#define ATMEL_TSADCC_MR		0x04	/* Mode register */
> -#define	  ATMEL_TSADCC_TSAMOD	(3    <<  0)	/* ADC mode */
> -#define	    ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE	(0x0)	/* ADC Mode */
> -#define	    ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE	(0x1)	/* Touch Screen Only Mode */
> -#define	  ATMEL_TSADCC_LOWRES	(1    <<  4)	/* Resolution selection */
> -#define	  ATMEL_TSADCC_SLEEP	(1    <<  5)	/* Sleep mode */
> -#define	  ATMEL_TSADCC_PENDET	(1    <<  6)	/* Pen Detect selection */
> -#define	  ATMEL_TSADCC_PRES	(1    <<  7)	/* Pressure Measurement Selection */
> -#define	  ATMEL_TSADCC_PRESCAL	(0x3f <<  8)	/* Prescalar Rate Selection */
> -#define	  ATMEL_TSADCC_EPRESCAL	(0xff <<  8)	/* Prescalar Rate Selection (Extended) */
> -#define	  ATMEL_TSADCC_STARTUP	(0x7f << 16)	/* Start Up time */
> -#define	  ATMEL_TSADCC_SHTIM	(0xf  << 24)	/* Sample & Hold time */
> -#define	  ATMEL_TSADCC_PENDBC	(0xf  << 28)	/* Pen Detect debouncing time */
> -
> -#define ATMEL_TSADCC_TRGR	0x08	/* Trigger register */
> -#define	  ATMEL_TSADCC_TRGMOD	(7      <<  0)	/* Trigger mode */
> -#define	    ATMEL_TSADCC_TRGMOD_NONE		(0 << 0)
> -#define     ATMEL_TSADCC_TRGMOD_EXT_RISING	(1 << 0)
> -#define     ATMEL_TSADCC_TRGMOD_EXT_FALLING	(2 << 0)
> -#define     ATMEL_TSADCC_TRGMOD_EXT_ANY		(3 << 0)
> -#define     ATMEL_TSADCC_TRGMOD_PENDET		(4 << 0)
> -#define     ATMEL_TSADCC_TRGMOD_PERIOD		(5 << 0)
> -#define     ATMEL_TSADCC_TRGMOD_CONTINUOUS	(6 << 0)
> -#define   ATMEL_TSADCC_TRGPER	(0xffff << 16)	/* Trigger period */
> -
> -#define ATMEL_TSADCC_TSR	0x0C	/* Touch Screen register */
> -#define	  ATMEL_TSADCC_TSFREQ	(0xf <<  0)	/* TS Frequency in Interleaved mode */
> -#define	  ATMEL_TSADCC_TSSHTIM	(0xf << 24)	/* Sample & Hold time */
> -
> -#define ATMEL_TSADCC_CHER	0x10	/* Channel Enable register */
> -#define ATMEL_TSADCC_CHDR	0x14	/* Channel Disable register */
> -#define ATMEL_TSADCC_CHSR	0x18	/* Channel Status register */
> -#define	  ATMEL_TSADCC_CH(n)	(1 << (n))	/* Channel number */
> -
> -#define ATMEL_TSADCC_SR		0x1C	/* Status register */
> -#define	  ATMEL_TSADCC_EOC(n)	(1 << ((n)+0))	/* End of conversion for channel N */
> -#define	  ATMEL_TSADCC_OVRE(n)	(1 << ((n)+8))	/* Overrun error for channel N */
> -#define	  ATMEL_TSADCC_DRDY	(1 << 16)	/* Data Ready */
> -#define	  ATMEL_TSADCC_GOVRE	(1 << 17)	/* General Overrun Error */
> -#define	  ATMEL_TSADCC_ENDRX	(1 << 18)	/* End of RX Buffer */
> -#define	  ATMEL_TSADCC_RXBUFF	(1 << 19)	/* TX Buffer full */
> -#define	  ATMEL_TSADCC_PENCNT	(1 << 20)	/* Pen contact */
> -#define	  ATMEL_TSADCC_NOCNT	(1 << 21)	/* No contact */
> -
> -#define ATMEL_TSADCC_LCDR	0x20	/* Last Converted Data register */
> -#define	  ATMEL_TSADCC_DATA	(0x3ff << 0)	/* Channel data */
> -
> -#define ATMEL_TSADCC_IER	0x24	/* Interrupt Enable register */
> -#define ATMEL_TSADCC_IDR	0x28	/* Interrupt Disable register */
> -#define ATMEL_TSADCC_IMR	0x2C	/* Interrupt Mask register */
> -#define ATMEL_TSADCC_CDR0	0x30	/* Channel Data 0 */
> -#define ATMEL_TSADCC_CDR1	0x34	/* Channel Data 1 */
> -#define ATMEL_TSADCC_CDR2	0x38	/* Channel Data 2 */
> -#define ATMEL_TSADCC_CDR3	0x3C	/* Channel Data 3 */
> -#define ATMEL_TSADCC_CDR4	0x40	/* Channel Data 4 */
> -#define ATMEL_TSADCC_CDR5	0x44	/* Channel Data 5 */
> -
> -#define ATMEL_TSADCC_XPOS	0x50
> -#define ATMEL_TSADCC_Z1DAT	0x54
> -#define ATMEL_TSADCC_Z2DAT	0x58
> -
> -#define PRESCALER_VAL(x)	((x) >> 8)
> -
> -#define ADC_DEFAULT_CLOCK	100000
> -
> -struct atmel_tsadcc {
> -	struct input_dev	*input;
> -	char			phys[32];
> -	struct clk		*clk;
> -	int			irq;
> -	unsigned int		prev_absx;
> -	unsigned int		prev_absy;
> -	unsigned char		bufferedmeasure;
> -};
> -
> -static void __iomem		*tsc_base;
> -
> -#define atmel_tsadcc_read(reg)		__raw_readl(tsc_base + (reg))
> -#define atmel_tsadcc_write(reg, val)	__raw_writel((val), tsc_base + (reg))
> -
> -static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev)
> -{
> -	struct atmel_tsadcc	*ts_dev = (struct atmel_tsadcc *)dev;
> -	struct input_dev	*input_dev = ts_dev->input;
> -
> -	unsigned int status;
> -	unsigned int reg;
> -
> -	status = atmel_tsadcc_read(ATMEL_TSADCC_SR);
> -	status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR);
> -
> -	if (status & ATMEL_TSADCC_NOCNT) {
> -		/* Contact lost */
> -		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC;
> -
> -		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
> -		atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
> -		atmel_tsadcc_write(ATMEL_TSADCC_IDR,
> -				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
> -		atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
> -
> -		input_report_key(input_dev, BTN_TOUCH, 0);
> -		ts_dev->bufferedmeasure = 0;
> -		input_sync(input_dev);
> -
> -	} else if (status & ATMEL_TSADCC_PENCNT) {
> -		/* Pen detected */
> -		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR);
> -		reg &= ~ATMEL_TSADCC_PENDBC;
> -
> -		atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT);
> -		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
> -		atmel_tsadcc_write(ATMEL_TSADCC_IER,
> -				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
> -		atmel_tsadcc_write(ATMEL_TSADCC_TRGR,
> -				   ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16));
> -
> -	} else if (status & ATMEL_TSADCC_EOC(3)) {
> -		/* Conversion finished */
> -
> -		if (ts_dev->bufferedmeasure) {
> -			/* Last measurement is always discarded, since it can
> -			 * be erroneous.
> -			 * Always report previous measurement */
> -			input_report_abs(input_dev, ABS_X, ts_dev->prev_absx);
> -			input_report_abs(input_dev, ABS_Y, ts_dev->prev_absy);
> -			input_report_key(input_dev, BTN_TOUCH, 1);
> -			input_sync(input_dev);
> -		} else
> -			ts_dev->bufferedmeasure = 1;
> -
> -		/* Now make new measurement */
> -		ts_dev->prev_absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10;
> -		ts_dev->prev_absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2);
> -
> -		ts_dev->prev_absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10;
> -		ts_dev->prev_absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0);
> -	}
> -
> -	return IRQ_HANDLED;
> -}
> -
> -/*
> - * The functions for inserting/removing us as a module.
> - */
> -
> -static int atmel_tsadcc_probe(struct platform_device *pdev)
> -{
> -	struct atmel_tsadcc	*ts_dev;
> -	struct input_dev	*input_dev;
> -	struct resource		*res;
> -	struct at91_tsadcc_data *pdata = dev_get_platdata(&pdev->dev);
> -	int		err;
> -	unsigned int	prsc;
> -	unsigned int	reg;
> -
> -	if (!pdata)
> -		return -EINVAL;
> -
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		dev_err(&pdev->dev, "no mmio resource defined.\n");
> -		return -ENXIO;
> -	}
> -
> -	/* Allocate memory for device */
> -	ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL);
> -	if (!ts_dev) {
> -		dev_err(&pdev->dev, "failed to allocate memory.\n");
> -		return -ENOMEM;
> -	}
> -	platform_set_drvdata(pdev, ts_dev);
> -
> -	input_dev = input_allocate_device();
> -	if (!input_dev) {
> -		dev_err(&pdev->dev, "failed to allocate input device.\n");
> -		err = -EBUSY;
> -		goto err_free_mem;
> -	}
> -
> -	ts_dev->irq = platform_get_irq(pdev, 0);
> -	if (ts_dev->irq < 0) {
> -		dev_err(&pdev->dev, "no irq ID is designated.\n");
> -		err = -ENODEV;
> -		goto err_free_dev;
> -	}
> -
> -	if (!request_mem_region(res->start, resource_size(res),
> -				"atmel tsadcc regs")) {
> -		dev_err(&pdev->dev, "resources is unavailable.\n");
> -		err = -EBUSY;
> -		goto err_free_dev;
> -	}
> -
> -	tsc_base = ioremap(res->start, resource_size(res));
> -	if (!tsc_base) {
> -		dev_err(&pdev->dev, "failed to map registers.\n");
> -		err = -ENOMEM;
> -		goto err_release_mem;
> -	}
> -
> -	err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, 0,
> -			pdev->dev.driver->name, ts_dev);
> -	if (err) {
> -		dev_err(&pdev->dev, "failed to allocate irq.\n");
> -		goto err_unmap_regs;
> -	}
> -
> -	ts_dev->clk = clk_get(&pdev->dev, "tsc_clk");
> -	if (IS_ERR(ts_dev->clk)) {
> -		dev_err(&pdev->dev, "failed to get ts_clk\n");
> -		err = PTR_ERR(ts_dev->clk);
> -		goto err_free_irq;
> -	}
> -
> -	ts_dev->input = input_dev;
> -	ts_dev->bufferedmeasure = 0;
> -
> -	snprintf(ts_dev->phys, sizeof(ts_dev->phys),
> -		 "%s/input0", dev_name(&pdev->dev));
> -
> -	input_dev->name = "atmel touch screen controller";
> -	input_dev->phys = ts_dev->phys;
> -	input_dev->dev.parent = &pdev->dev;
> -
> -	__set_bit(EV_ABS, input_dev->evbit);
> -	input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0);
> -	input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0);
> -
> -	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
> -
> -	/* clk_enable() always returns 0, no need to check it */
> -	clk_enable(ts_dev->clk);
> -
> -	prsc = clk_get_rate(ts_dev->clk);
> -	dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc);
> -
> -	if (!pdata->adc_clock)
> -		pdata->adc_clock = ADC_DEFAULT_CLOCK;
> -
> -	prsc = (prsc / (2 * pdata->adc_clock)) - 1;
> -
> -	/* saturate if this value is too high */
> -	if (cpu_is_at91sam9rl()) {
> -		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_PRESCAL))
> -			prsc = PRESCALER_VAL(ATMEL_TSADCC_PRESCAL);
> -	} else {
> -		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL))
> -			prsc = PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL);
> -	}
> -
> -	dev_info(&pdev->dev, "Prescaler is set at: %d\n", prsc);
> -
> -	reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE		|
> -		((0x00 << 5) & ATMEL_TSADCC_SLEEP)	|	/* Normal Mode */
> -		((0x01 << 6) & ATMEL_TSADCC_PENDET)	|	/* Enable Pen Detect */
> -		(prsc << 8)				|
> -		((0x26 << 16) & ATMEL_TSADCC_STARTUP)	|
> -		((pdata->pendet_debounce << 28) & ATMEL_TSADCC_PENDBC);
> -
> -	atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST);
> -	atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
> -	atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
> -	atmel_tsadcc_write(ATMEL_TSADCC_TSR,
> -		(pdata->ts_sample_hold_time << 24) & ATMEL_TSADCC_TSSHTIM);
> -
> -	atmel_tsadcc_read(ATMEL_TSADCC_SR);
> -	atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
> -
> -	/* All went ok, so register to the input system */
> -	err = input_register_device(input_dev);
> -	if (err)
> -		goto err_fail;
> -
> -	return 0;
> -
> -err_fail:
> -	clk_disable(ts_dev->clk);
> -	clk_put(ts_dev->clk);
> -err_free_irq:
> -	free_irq(ts_dev->irq, ts_dev);
> -err_unmap_regs:
> -	iounmap(tsc_base);
> -err_release_mem:
> -	release_mem_region(res->start, resource_size(res));
> -err_free_dev:
> -	input_free_device(input_dev);
> -err_free_mem:
> -	kfree(ts_dev);
> -	return err;
> -}
> -
> -static int atmel_tsadcc_remove(struct platform_device *pdev)
> -{
> -	struct atmel_tsadcc *ts_dev = platform_get_drvdata(pdev);
> -	struct resource *res;
> -
> -	free_irq(ts_dev->irq, ts_dev);
> -
> -	input_unregister_device(ts_dev->input);
> -
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	iounmap(tsc_base);
> -	release_mem_region(res->start, resource_size(res));
> -
> -	clk_disable(ts_dev->clk);
> -	clk_put(ts_dev->clk);
> -
> -	kfree(ts_dev);
> -
> -	return 0;
> -}
> -
> -static struct platform_driver atmel_tsadcc_driver = {
> -	.probe		= atmel_tsadcc_probe,
> -	.remove		= atmel_tsadcc_remove,
> -	.driver		= {
> -		.name	= "atmel_tsadcc",
> -	},
> -};
> -module_platform_driver(atmel_tsadcc_driver);
> -
> -MODULE_LICENSE("GPL");
> -MODULE_DESCRIPTION("Atmel TouchScreen Driver");
> -MODULE_AUTHOR("Dan Liang <dan.liang@atmel.com>");
> -
> -- 
> 1.8.3.2
> 

-- 
Dmitry

Re: [PATCH 04/15] iio: adc: at91_adc: Add support for touchscreens without TSMR

[Dmitry Torokhov]

On Wed, Mar 05, 2014 at 06:35:29PM +0100, Alexandre Belloni wrote:
> Old ADCs, as present on the sam9rl and the sam9g45 don't have a TSMR register
> and the touchscreen support should be handled differently.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
>  arch/arm/mach-at91/include/mach/at91_adc.h |  13 ++
>  drivers/iio/adc/at91_adc.c                 | 199 ++++++++++++++++++++++-------
>  include/linux/platform_data/at91_adc.h     |   8 ++
>  3 files changed, 172 insertions(+), 48 deletions(-)
> 
> diff --git a/arch/arm/mach-at91/include/mach/at91_adc.h b/arch/arm/mach-at91/include/mach/at91_adc.h
> index c287307b9a3b..7d80396346b2 100644
> --- a/arch/arm/mach-at91/include/mach/at91_adc.h
> +++ b/arch/arm/mach-at91/include/mach/at91_adc.h
> @@ -20,6 +20,9 @@
>  #define		AT91_ADC_START		(1 << 1)	/* Start Conversion */
>  
>  #define AT91_ADC_MR		0x04		/* Mode Register */
> +#define		AT91_ADC_TSAMOD		(3 << 0)	/* ADC mode */
> +#define		AT91_ADC_TSAMOD_ADC_ONLY_MODE		(0 << 0)	/* ADC Mode */
> +#define		AT91_ADC_TSAMOD_TS_ONLY_MODE		(1 << 0)	/* Touch Screen Only Mode */
>  #define		AT91_ADC_TRGEN		(1 << 0)	/* Trigger Enable */
>  #define		AT91_ADC_TRGSEL		(7 << 1)	/* Trigger Selection */
>  #define			AT91_ADC_TRGSEL_TC0		(0 << 1)
> @@ -28,6 +31,7 @@
>  #define			AT91_ADC_TRGSEL_EXTERNAL	(6 << 1)
>  #define		AT91_ADC_LOWRES		(1 << 4)	/* Low Resolution */
>  #define		AT91_ADC_SLEEP		(1 << 5)	/* Sleep Mode */
> +#define		AT91_ADC_PENDET		(1 << 6)	/* Pen contact detection enable */
>  #define		AT91_ADC_PRESCAL_9260	(0x3f << 8)	/* Prescalar Rate Selection */
>  #define		AT91_ADC_PRESCAL_9G45	(0xff << 8)
>  #define			AT91_ADC_PRESCAL_(x)	((x) << 8)
> @@ -37,6 +41,12 @@
>  #define			AT91_ADC_STARTUP_(x)	((x) << 16)
>  #define		AT91_ADC_SHTIM		(0xf  << 24)	/* Sample & Hold Time */
>  #define			AT91_ADC_SHTIM_(x)	((x) << 24)
> +#define		AT91_ADC_PENDBC		(0x0f << 28)	/* Pen Debounce time */
> +#define			AT91_ADC_PENDBC_(x)	((x) << 28)
> +
> +#define AT91_ADC_TSR		0x0C
> +#define		AT91_ADC_TSR_SHTIM	(0xf  << 24)	/* Sample & Hold Time */
> +#define			AT91_ADC_TSR_SHTIM_(x)	((x) << 24)
>  
>  #define AT91_ADC_CHER		0x10		/* Channel Enable Register */
>  #define AT91_ADC_CHDR		0x14		/* Channel Disable Register */
> @@ -60,6 +70,8 @@
>  #define AT91_ADC_IER		0x24		/* Interrupt Enable Register */
>  #define AT91_ADC_IDR		0x28		/* Interrupt Disable Register */
>  #define AT91_ADC_IMR		0x2C		/* Interrupt Mask Register */
> +#define		AT91RL_ADC_IER_PEN	(1 << 20)
> +#define		AT91RL_ADC_IER_NOPEN	(1 << 21)
>  #define		AT91_ADC_IER_PEN	(1 << 29)
>  #define		AT91_ADC_IER_NOPEN	(1 << 30)
>  #define		AT91_ADC_IER_XRDY	(1 << 20)
> @@ -102,6 +114,7 @@
>  #define		AT91_ADC_TRGR_TRGPER	(0xffff << 16)
>  #define			AT91_ADC_TRGR_TRGPER_(x)	((x) << 16)
>  #define		AT91_ADC_TRGR_TRGMOD	(0x7 << 0)
> +#define			AT91_ADC_TRGR_NONE		(0 << 0)
>  #define			AT91_ADC_TRGR_MOD_PERIOD_TRIG	(5 << 0)
>  
>  #endif
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 1beae65aef2c..3e92b16e9301 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -46,6 +46,10 @@
>  #define TOUCH_SAMPLE_PERIOD_US		2000	/* 2ms */
>  #define TOUCH_PEN_DETECT_DEBOUNCE_US	200
>  
> +#define MAX_RLPOS_BITS         10
> +#define TOUCH_SAMPLE_PERIOD_US_RL      10000   /* 10ms, the SoC can't keep up with 2ms */
> +#define TOUCH_SHTIM                    0xa
> +
>  /**
>   * struct at91_adc_reg_desc - Various informations relative to registers
>   * @channel_base:	Base offset for the channel data registers
> @@ -83,12 +87,6 @@ struct at91_adc_caps {
>  	struct at91_adc_reg_desc registers;
>  };
>  
> -enum atmel_adc_ts_type {
> -	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> -	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> -	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> -};
> -
>  struct at91_adc_state {
>  	struct clk		*adc_clk;
>  	u16			*buffer;
> @@ -133,6 +131,11 @@ struct at91_adc_state {
>  
>  	u16			ts_sample_period_val;
>  	u32			ts_pressure_threshold;
> +	u16			ts_pendbc;
> +
> +	u8			ts_bufferedmeasure;

bool?

> +	u32			ts_prev_absx;
> +	u32			ts_prev_absy;
>  };
>  
>  static irqreturn_t at91_adc_trigger_handler(int irq, void *p)
> @@ -239,19 +242,68 @@ static int at91_ts_sample(struct at91_adc_state *st)
>  	return 0;
>  }
>  
> -static irqreturn_t at91_adc_interrupt(int irq, void *private)
> +void handle_adc_rl_ts_irq(int irq, struct at91_adc_state *st, u32 status)
> +{
> +	unsigned int reg;
> +
> +	status &= at91_adc_readl(st, AT91_ADC_IMR);
> +	if (status & AT91RL_ADC_IER_PEN) {
> +		/* Disabling pen debounce is required to get a NOPEN irq */
> +		reg = at91_adc_readl(st, AT91_ADC_MR);
> +		reg &= ~AT91_ADC_PENDBC;
> +		at91_adc_writel(st, AT91_ADC_MR, reg);
> +
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
> +		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_NOPEN
> +				| AT91_ADC_EOC(3));
> +		/* Set up period trigger for sampling */
> +		at91_adc_writel(st, st->registers->trigger_register,
> +			AT91_ADC_TRGR_MOD_PERIOD_TRIG |
> +			AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val));
> +	} else if (status & AT91RL_ADC_IER_NOPEN) {
> +		reg = at91_adc_readl(st, AT91_ADC_MR);
> +		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;
> +		at91_adc_writel(st, AT91_ADC_MR, reg);
> +		at91_adc_writel(st, st->registers->trigger_register,
> +			AT91_ADC_TRGR_NONE);
> +
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_NOPEN
> +				| AT91_ADC_EOC(3));
> +		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);
> +		st->ts_bufferedmeasure = 0;

		st->ts_bufferedmeasure = false;

> +		input_report_key(st->ts_input, BTN_TOUCH, 0);
> +		input_sync(st->ts_input);
> +	} else if (status & AT91_ADC_EOC(3)) {
> +		/* Conversion finished */
> +		if (st->ts_bufferedmeasure) {
> +			/* Last measurement is always discarded, since it can
> +			 * be erroneous.
> +			 * Always report previous measurement */

			/*
			 * Multi-line comment.
			 */

> +			input_report_abs(st->ts_input, ABS_X, st->ts_prev_absx);
> +			input_report_abs(st->ts_input, ABS_Y, st->ts_prev_absy);
> +			input_report_key(st->ts_input, BTN_TOUCH, 1);
> +			input_sync(st->ts_input);
> +		} else
> +			st->ts_bufferedmeasure = 1;

		} else {
			st->ts_bufferedmeasure = true;
		}

> +
> +		/* Now make new measurement */
> +		st->ts_prev_absx = at91_adc_readl(st, AT91_ADC_CHAN(st, 3))
> +				   << MAX_RLPOS_BITS;
> +		st->ts_prev_absx /= at91_adc_readl(st, AT91_ADC_CHAN(st, 2));
> +
> +		st->ts_prev_absy = at91_adc_readl(st, AT91_ADC_CHAN(st, 1))
> +				   << MAX_RLPOS_BITS;
> +		st->ts_prev_absy /= at91_adc_readl(st, AT91_ADC_CHAN(st, 0));
> +	}
> +}
> +
> +void handle_adc_9x5_ts_irq(int irq, struct at91_adc_state *st, u32 status)
>  {
> -	struct iio_dev *idev = private;
> -	struct at91_adc_state *st = iio_priv(idev);
> -	u32 status = at91_adc_readl(st, st->registers->status_register);
>  	const uint32_t ts_data_irq_mask =
>  		AT91_ADC_IER_XRDY |
>  		AT91_ADC_IER_YRDY |
>  		AT91_ADC_IER_PRDY;
>  
> -	if (status & st->registers->drdy_mask)
> -		handle_adc_eoc_trigger(irq, idev);
> -
>  	if (status & AT91_ADC_IER_PEN) {
>  		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
>  		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_NOPEN |
> @@ -283,6 +335,21 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private)
>  			at91_adc_readl(st, AT91_ADC_TSPRESSR);
>  		}
>  	}
> +}
> +
> +static irqreturn_t at91_adc_interrupt(int irq, void *private)
> +{
> +	struct iio_dev *idev = private;
> +	struct at91_adc_state *st = iio_priv(idev);
> +	u32 status = at91_adc_readl(st, st->registers->status_register);
> +
> +	if (status & st->registers->drdy_mask)
> +		handle_adc_eoc_trigger(irq, idev);
> +
> +	if (st->caps->has_tsmr)

Instead of testing maybe you shoudl have 2 separate IRQ handl3er and
instantiate appropriate one depending on device caps?

> +		handle_adc_9x5_ts_irq(irq, st, status);
> +	else
> +		handle_adc_rl_ts_irq(irq, st, status);
>  
>  	return IRQ_HANDLED;
>  }
> @@ -672,6 +739,8 @@ static int at91_adc_probe_dt_ts(struct device_node *node,
>  		return -EINVAL;
>  	}
>  
> +	if (!st->caps->has_tsmr)
> +		return 0;
>  	prop = 0;
>  	of_property_read_u32(node, "atmel,adc-ts-pressure-threshold", &prop);
>  	st->ts_pressure_threshold = prop;
> @@ -795,6 +864,7 @@ static int at91_adc_probe_pdata(struct at91_adc_state *st,
>  	st->trigger_number = pdata->trigger_number;
>  	st->trigger_list = pdata->trigger_list;
>  	st->registers = &st->caps->registers;
> +	st->touchscreen_type = pdata->touchscreen_type;
>  
>  	return 0;
>  }
> @@ -809,7 +879,10 @@ static int atmel_ts_open(struct input_dev *dev)
>  {
>  	struct at91_adc_state *st = input_get_drvdata(dev);
>  
> -	at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);
> +	if (st->caps->has_tsmr)
> +		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);
> +	else
> +		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);
>  	return 0;
>  }
>  
> @@ -817,45 +890,61 @@ static void atmel_ts_close(struct input_dev *dev)
>  {
>  	struct at91_adc_state *st = input_get_drvdata(dev);
>  
> -	at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
> +	if (st->caps->has_tsmr)
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
> +	else
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
>  }
>  
>  static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
>  {
> -	u32 reg = 0, pendbc;
> +	u32 reg = 0;
>  	int i = 0;
>  
> -	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)
> -		reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS;
> -	else
> -		reg = AT91_ADC_TSMR_TSMODE_5WIRE;
> -
>  	/* a Pen Detect Debounce Time is necessary for the ADC Touch to avoid
>  	 * pen detect noise.
>  	 * The formula is : Pen Detect Debounce Time = (2 ^ pendbc) / ADCClock
>  	 */
> -	pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz / 1000, 1);
> +	st->ts_pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz /
> +				 1000, 1);
>  
> -	while (pendbc >> ++i)
> +	while (st->ts_pendbc >> ++i)
>  		;	/* Empty! Find the shift offset */
> -	if (abs(pendbc - (1 << i)) < abs(pendbc - (1 << (i - 1))))
> -		pendbc = i;
> +	if (abs(st->ts_pendbc - (1 << i)) < abs(st->ts_pendbc - (1 << (i - 1))))
> +		st->ts_pendbc = i;
>  	else
> -		pendbc = i - 1;
> +		st->ts_pendbc = i - 1;
>  
> -	if (st->caps->has_tsmr) {
> -		reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)
> -				& AT91_ADC_TSMR_TSAV;
> -		reg |= AT91_ADC_TSMR_PENDBC_(pendbc) & AT91_ADC_TSMR_PENDBC;
> -		reg |= AT91_ADC_TSMR_NOTSDMA;
> -		reg |= AT91_ADC_TSMR_PENDET_ENA;
> -		reg |= 0x03 << 8;	/* TSFREQ, need bigger than TSAV */
> -
> -		at91_adc_writel(st, AT91_ADC_TSMR, reg);
> -	} else {
> -		/* TODO: for 9g45 which has no TSMR */
> +	if (!st->caps->has_tsmr) {
> +		reg = at91_adc_readl(st, AT91_ADC_MR);
> +		reg |= AT91_ADC_TSAMOD_TS_ONLY_MODE | AT91_ADC_PENDET;
> +
> +		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;
> +		at91_adc_writel(st, AT91_ADC_MR, reg);
> +
> +		reg = AT91_ADC_TSR_SHTIM_(TOUCH_SHTIM) & AT91_ADC_TSR_SHTIM;
> +		at91_adc_writel(st, AT91_ADC_TSR, reg);
> +
> +		st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US_RL *
> +						    adc_clk_khz / 1000) - 1, 1);
> +
> +		return 0;
>  	}
>  
> +	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)
> +		reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS;
> +	else
> +		reg = AT91_ADC_TSMR_TSMODE_5WIRE;
> +
> +	reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)
> +	       & AT91_ADC_TSMR_TSAV;
> +	reg |= AT91_ADC_TSMR_PENDBC_(st->ts_pendbc) & AT91_ADC_TSMR_PENDBC;
> +	reg |= AT91_ADC_TSMR_NOTSDMA;
> +	reg |= AT91_ADC_TSMR_PENDET_ENA;
> +	reg |= 0x03 << 8;	/* TSFREQ, needs to be bigger than TSAV */
> +
> +	at91_adc_writel(st, AT91_ADC_TSMR, reg);
> +
>  	/* Change adc internal resistor value for better pen detection,
>  	 * default value is 100 kOhm.
>  	 * 0 = 200 kOhm, 1 = 150 kOhm, 2 = 100 kOhm, 3 = 50 kOhm
> @@ -864,7 +953,7 @@ static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
>  	at91_adc_writel(st, AT91_ADC_ACR, st->caps->ts_pen_detect_sensitivity
>  			& AT91_ADC_ACR_PENDETSENS);
>  
> -	/* Sample Peroid Time = (TRGPER + 1) / ADCClock */
> +	/* Sample Period Time = (TRGPER + 1) / ADCClock */
>  	st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US *
>  			adc_clk_khz / 1000) - 1, 1);
>  
> @@ -893,17 +982,37 @@ static int at91_ts_register(struct at91_adc_state *st,
>  	__set_bit(EV_ABS, input->evbit);
>  	__set_bit(EV_KEY, input->evbit);
>  	__set_bit(BTN_TOUCH, input->keybit);
> -	input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1, 0, 0);
> -	input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1, 0, 0);
> -	input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0);
> +	if (st->caps->has_tsmr) {
> +		input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1,
> +				     0, 0);
> +		input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1,
> +				     0, 0);
> +		input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0);
> +	} else {
> +		if (st->touchscreen_type != ATMEL_ADC_TOUCHSCREEN_4WIRE) {
> +			dev_err(&pdev->dev,
> +				"This touchscreen controller only support 4 wires\n");
> +			ret = -EINVAL;
> +			goto err;
> +		}
> +
> +		input_set_abs_params(input, ABS_X, 0, (1 << MAX_RLPOS_BITS) - 1,
> +				     0, 0);
> +		input_set_abs_params(input, ABS_Y, 0, (1 << MAX_RLPOS_BITS) - 1,
> +				     0, 0);
> +	}
>  
>  	st->ts_input = input;
>  	input_set_drvdata(input, st);
>  
>  	ret = input_register_device(input);
>  	if (ret)
> -		input_free_device(st->ts_input);
> +		goto err;
> +
> +	return ret;
>  
> +err:
> +	input_free_device(st->ts_input);
>  	return ret;
>  }
>  
> @@ -1070,12 +1179,6 @@ static int at91_adc_probe(struct platform_device *pdev)
>  			goto error_disable_adc_clk;
>  		}
>  	} else {
> -		if (!st->caps->has_tsmr) {
> -			dev_err(&pdev->dev, "We don't support non-TSMR adc\n");
> -			ret = -ENODEV;
> -			goto error_disable_adc_clk;
> -		}
> -
>  		ret = at91_ts_register(st, pdev);
>  		if (ret)
>  			goto error_disable_adc_clk;
> diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
> index fcf73879dbfe..7819fc787731 100644
> --- a/include/linux/platform_data/at91_adc.h
> +++ b/include/linux/platform_data/at91_adc.h
> @@ -7,6 +7,12 @@
>  #ifndef _AT91_ADC_H_
>  #define _AT91_ADC_H_
>  
> +enum atmel_adc_ts_type {
> +	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> +	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> +	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> +};
> +
>  /**
>   * struct at91_adc_trigger - description of triggers
>   * @name:		name of the trigger advertised to the user
> @@ -28,6 +34,7 @@ struct at91_adc_trigger {
>   * @trigger_number:		Number of triggers available in the ADC
>   * @use_external_triggers:	does the board has external triggers availables
>   * @vref:			Reference voltage for the ADC in millivolts
> + * @touchscreen_type:		If a touchscreen is connected, its type (4 or 5 wires)
>   */
>  struct at91_adc_data {
>  	unsigned long			channels_used;
> @@ -36,6 +43,7 @@ struct at91_adc_data {
>  	u8				trigger_number;
>  	bool				use_external_triggers;
>  	u16				vref;
> +	enum atmel_adc_ts_type		touchscreen_type;
>  };
>  
>  extern void __init at91_add_device_adc(struct at91_adc_data *data);
> -- 
> 1.8.3.2
> 

Thanks.

-- 
Dmitry

Re: [PATCH 01/15] ARM: at91: sam9g45: remove unused platform_data

[Jonathan Cameron]

On 05/03/14 17:35, Alexandre Belloni wrote:
> num_channels and registers are not used anymore since they are defined inside
> the at91_adc driver and assigned by matching the id_table.
>
> Also, remove the mach/at91_adc.h include that is not necessary anymore.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Acked-by: Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

> ---
>   arch/arm/mach-at91/at91sam9g45_devices.c | 10 ----------
>   1 file changed, 10 deletions(-)
>
> diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
> index 88554024eb2d..cd36009c3511 100644
> --- a/arch/arm/mach-at91/at91sam9g45_devices.c
> +++ b/arch/arm/mach-at91/at91sam9g45_devices.c
> @@ -25,7 +25,6 @@
>   #include <linux/fb.h>
>   #include <video/atmel_lcdc.h>
>
> -#include <mach/at91_adc.h>
>   #include <mach/at91sam9g45.h>
>   #include <mach/at91sam9g45_matrix.h>
>   #include <mach/at91_matrix.h>
> @@ -1235,13 +1234,6 @@ static struct at91_adc_trigger at91_adc_triggers[] = {
>   	},
>   };
>
> -static struct at91_adc_reg_desc at91_adc_register_g45 = {
> -	.channel_base = AT91_ADC_CHR(0),
> -	.drdy_mask = AT91_ADC_DRDY,
> -	.status_register = AT91_ADC_SR,
> -	.trigger_register = 0x08,
> -};
> -
>   void __init at91_add_device_adc(struct at91_adc_data *data)
>   {
>   	if (!data)
> @@ -1267,9 +1259,7 @@ void __init at91_add_device_adc(struct at91_adc_data *data)
>   	if (data->use_external_triggers)
>   		at91_set_A_periph(AT91_PIN_PD28, 0);
>
> -	data->num_channels = 8;
>   	data->startup_time = 40;
> -	data->registers = &at91_adc_register_g45;
>   	data->trigger_number = 4;
>   	data->trigger_list = at91_adc_triggers;
>
>

Re: [PATCH 02/15] ARM: at91: sam9260: remove unused platform_data

[Jonathan Cameron]

On 05/03/14 17:35, Alexandre Belloni wrote:
> num_channels and registers are not used anymore since they are defined inside
> the at91_adc driver and assigned by matching the id_table.
>
> Also, remove the mach/at91_adc.h include that is not necessary anymore.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Acked-by: Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> ---
>   arch/arm/mach-at91/at91sam9260_devices.c | 10 ----------
>   1 file changed, 10 deletions(-)
>
> diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
> index 0a0315920963..a299c50512f0 100644
> --- a/arch/arm/mach-at91/at91sam9260_devices.c
> +++ b/arch/arm/mach-at91/at91sam9260_devices.c
> @@ -24,7 +24,6 @@
>   #include <mach/at91sam9260_matrix.h>
>   #include <mach/at91_matrix.h>
>   #include <mach/at91sam9_smc.h>
> -#include <mach/at91_adc.h>
>
>   #include "board.h"
>   #include "generic.h"
> @@ -1321,13 +1320,6 @@ static struct at91_adc_trigger at91_adc_triggers[] = {
>   	},
>   };
>
> -static struct at91_adc_reg_desc at91_adc_register_g20 = {
> -	.channel_base = AT91_ADC_CHR(0),
> -	.drdy_mask = AT91_ADC_DRDY,
> -	.status_register = AT91_ADC_SR,
> -	.trigger_register = AT91_ADC_MR,
> -};
> -
>   void __init at91_add_device_adc(struct at91_adc_data *data)
>   {
>   	if (!data)
> @@ -1345,9 +1337,7 @@ void __init at91_add_device_adc(struct at91_adc_data *data)
>   	if (data->use_external_triggers)
>   		at91_set_A_periph(AT91_PIN_PA22, 0);
>
> -	data->num_channels = 4;
>   	data->startup_time = 10;
> -	data->registers = &at91_adc_register_g20;
>   	data->trigger_number = 4;
>   	data->trigger_list = at91_adc_triggers;
>
>

Re: [PATCH 03/15] iio: adc: at91: cleanup platform_data

[Jonathan Cameron]

On 05/03/14 17:35, Alexandre Belloni wrote:
> num_channels and registers are not used anymore since they are defined inside
> the driver and assigned by matching the id_table.
>
> Also, struct at91_adc_reg_desc is now only used inside the driver.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>

Hmm. Looking on in the series, I'm guessing taking the lot through IIO
once everyone is happy is probably the way to go.

I'll be wanting acks from Atmel maintainers for pretty much all of them though.

Jonathan
> ---
>   drivers/iio/adc/at91_adc.c             | 19 +++++++++++++++++++
>   include/linux/platform_data/at91_adc.h | 23 -----------------------
>   2 files changed, 19 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 89777ed9abd8..1beae65aef2c 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -46,6 +46,25 @@
>   #define TOUCH_SAMPLE_PERIOD_US		2000	/* 2ms */
>   #define TOUCH_PEN_DETECT_DEBOUNCE_US	200
>
> +/**
> + * struct at91_adc_reg_desc - Various informations relative to registers
> + * @channel_base:	Base offset for the channel data registers
> + * @drdy_mask:		Mask of the DRDY field in the relevant registers
> +			(Interruptions registers mostly)
> + * @status_register:	Offset of the Interrupt Status Register
> + * @trigger_register:	Offset of the Trigger setup register
> + * @mr_prescal_mask:	Mask of the PRESCAL field in the adc MR register
> + * @mr_startup_mask:	Mask of the STARTUP field in the adc MR register
> + */
> +struct at91_adc_reg_desc {
> +	u8	channel_base;
> +	u32	drdy_mask;
> +	u8	status_register;
> +	u8	trigger_register;
> +	u32	mr_prescal_mask;
> +	u32	mr_startup_mask;
> +};
> +
>   struct at91_adc_caps {
>   	bool	has_ts;		/* Support touch screen */
>   	bool	has_tsmr;	/* only at91sam9x5, sama5d3 have TSMR reg */
> diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
> index b3ca1e94e0c8..fcf73879dbfe 100644
> --- a/include/linux/platform_data/at91_adc.h
> +++ b/include/linux/platform_data/at91_adc.h
> @@ -8,25 +8,6 @@
>   #define _AT91_ADC_H_
>
>   /**
> - * struct at91_adc_reg_desc - Various informations relative to registers
> - * @channel_base:	Base offset for the channel data registers
> - * @drdy_mask:		Mask of the DRDY field in the relevant registers
> -			(Interruptions registers mostly)
> - * @status_register:	Offset of the Interrupt Status Register
> - * @trigger_register:	Offset of the Trigger setup register
> - * @mr_prescal_mask:	Mask of the PRESCAL field in the adc MR register
> - * @mr_startup_mask:	Mask of the STARTUP field in the adc MR register
> - */
> -struct at91_adc_reg_desc {
> -	u8	channel_base;
> -	u32	drdy_mask;
> -	u8	status_register;
> -	u8	trigger_register;
> -	u32	mr_prescal_mask;
> -	u32	mr_startup_mask;
> -};
> -
> -/**
>    * struct at91_adc_trigger - description of triggers
>    * @name:		name of the trigger advertised to the user
>    * @value:		value to set in the ADC's trigger setup register
> @@ -42,8 +23,6 @@ struct at91_adc_trigger {
>   /**
>    * struct at91_adc_data - platform data for ADC driver
>    * @channels_used:		channels in use on the board as a bitmask
> - * @num_channels:		global number of channels available on the board
> - * @registers:			Registers definition on the board
>    * @startup_time:		startup time of the ADC in microseconds
>    * @trigger_list:		Triggers available in the ADC
>    * @trigger_number:		Number of triggers available in the ADC
> @@ -52,8 +31,6 @@ struct at91_adc_trigger {
>    */
>   struct at91_adc_data {
>   	unsigned long			channels_used;
> -	u8				num_channels;
> -	struct at91_adc_reg_desc	*registers;
>   	u8				startup_time;
>   	struct at91_adc_trigger		*trigger_list;
>   	u8				trigger_number;
>

Re: [PATCH 04/15] iio: adc: at91_adc: Add support for touchscreens without TSMR

[Jonathan Cameron]

On 05/03/14 17:35, Alexandre Belloni wrote:
> Old ADCs, as present on the sam9rl and the sam9g45 don't have a TSMR register
> and the touchscreen support should be handled differently.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
One comment inline about handling of devices where the platform data doesn't
include the touchscreen type.  I'd expect zero to be the current default
rather than NONE...
> ---
>   arch/arm/mach-at91/include/mach/at91_adc.h |  13 ++
>   drivers/iio/adc/at91_adc.c                 | 199 ++++++++++++++++++++++-------
>   include/linux/platform_data/at91_adc.h     |   8 ++
>   3 files changed, 172 insertions(+), 48 deletions(-)
>
> diff --git a/arch/arm/mach-at91/include/mach/at91_adc.h b/arch/arm/mach-at91/include/mach/at91_adc.h
> index c287307b9a3b..7d80396346b2 100644
> --- a/arch/arm/mach-at91/include/mach/at91_adc.h
> +++ b/arch/arm/mach-at91/include/mach/at91_adc.h
> @@ -20,6 +20,9 @@
>   #define		AT91_ADC_START		(1 << 1)	/* Start Conversion */
>
>   #define AT91_ADC_MR		0x04		/* Mode Register */
> +#define		AT91_ADC_TSAMOD		(3 << 0)	/* ADC mode */
> +#define		AT91_ADC_TSAMOD_ADC_ONLY_MODE		(0 << 0)	/* ADC Mode */
> +#define		AT91_ADC_TSAMOD_TS_ONLY_MODE		(1 << 0)	/* Touch Screen Only Mode */
>   #define		AT91_ADC_TRGEN		(1 << 0)	/* Trigger Enable */
>   #define		AT91_ADC_TRGSEL		(7 << 1)	/* Trigger Selection */
>   #define			AT91_ADC_TRGSEL_TC0		(0 << 1)
> @@ -28,6 +31,7 @@
>   #define			AT91_ADC_TRGSEL_EXTERNAL	(6 << 1)
>   #define		AT91_ADC_LOWRES		(1 << 4)	/* Low Resolution */
>   #define		AT91_ADC_SLEEP		(1 << 5)	/* Sleep Mode */
> +#define		AT91_ADC_PENDET		(1 << 6)	/* Pen contact detection enable */
>   #define		AT91_ADC_PRESCAL_9260	(0x3f << 8)	/* Prescalar Rate Selection */
>   #define		AT91_ADC_PRESCAL_9G45	(0xff << 8)
>   #define			AT91_ADC_PRESCAL_(x)	((x) << 8)
> @@ -37,6 +41,12 @@
>   #define			AT91_ADC_STARTUP_(x)	((x) << 16)
>   #define		AT91_ADC_SHTIM		(0xf  << 24)	/* Sample & Hold Time */
>   #define			AT91_ADC_SHTIM_(x)	((x) << 24)
> +#define		AT91_ADC_PENDBC		(0x0f << 28)	/* Pen Debounce time */
> +#define			AT91_ADC_PENDBC_(x)	((x) << 28)
> +
> +#define AT91_ADC_TSR		0x0C
> +#define		AT91_ADC_TSR_SHTIM	(0xf  << 24)	/* Sample & Hold Time */
> +#define			AT91_ADC_TSR_SHTIM_(x)	((x) << 24)
>
>   #define AT91_ADC_CHER		0x10		/* Channel Enable Register */
>   #define AT91_ADC_CHDR		0x14		/* Channel Disable Register */
> @@ -60,6 +70,8 @@
>   #define AT91_ADC_IER		0x24		/* Interrupt Enable Register */
>   #define AT91_ADC_IDR		0x28		/* Interrupt Disable Register */
>   #define AT91_ADC_IMR		0x2C		/* Interrupt Mask Register */
> +#define		AT91RL_ADC_IER_PEN	(1 << 20)
> +#define		AT91RL_ADC_IER_NOPEN	(1 << 21)
>   #define		AT91_ADC_IER_PEN	(1 << 29)
>   #define		AT91_ADC_IER_NOPEN	(1 << 30)
>   #define		AT91_ADC_IER_XRDY	(1 << 20)
> @@ -102,6 +114,7 @@
>   #define		AT91_ADC_TRGR_TRGPER	(0xffff << 16)
>   #define			AT91_ADC_TRGR_TRGPER_(x)	((x) << 16)
>   #define		AT91_ADC_TRGR_TRGMOD	(0x7 << 0)
> +#define			AT91_ADC_TRGR_NONE		(0 << 0)
>   #define			AT91_ADC_TRGR_MOD_PERIOD_TRIG	(5 << 0)
>
>   #endif
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 1beae65aef2c..3e92b16e9301 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -46,6 +46,10 @@
>   #define TOUCH_SAMPLE_PERIOD_US		2000	/* 2ms */
>   #define TOUCH_PEN_DETECT_DEBOUNCE_US	200
>
> +#define MAX_RLPOS_BITS         10
> +#define TOUCH_SAMPLE_PERIOD_US_RL      10000   /* 10ms, the SoC can't keep up with 2ms */
> +#define TOUCH_SHTIM                    0xa
> +
>   /**
>    * struct at91_adc_reg_desc - Various informations relative to registers
>    * @channel_base:	Base offset for the channel data registers
> @@ -83,12 +87,6 @@ struct at91_adc_caps {
>   	struct at91_adc_reg_desc registers;
>   };
>
> -enum atmel_adc_ts_type {
> -	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> -	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> -	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> -};
> -
>   struct at91_adc_state {
>   	struct clk		*adc_clk;
>   	u16			*buffer;
> @@ -133,6 +131,11 @@ struct at91_adc_state {
>
>   	u16			ts_sample_period_val;
>   	u32			ts_pressure_threshold;
> +	u16			ts_pendbc;
> +
> +	u8			ts_bufferedmeasure;
> +	u32			ts_prev_absx;
> +	u32			ts_prev_absy;
>   };
>
>   static irqreturn_t at91_adc_trigger_handler(int irq, void *p)
> @@ -239,19 +242,68 @@ static int at91_ts_sample(struct at91_adc_state *st)
>   	return 0;
>   }
>
> -static irqreturn_t at91_adc_interrupt(int irq, void *private)
> +void handle_adc_rl_ts_irq(int irq, struct at91_adc_state *st, u32 status)
> +{
> +	unsigned int reg;
> +
> +	status &= at91_adc_readl(st, AT91_ADC_IMR);
> +	if (status & AT91RL_ADC_IER_PEN) {
> +		/* Disabling pen debounce is required to get a NOPEN irq */
> +		reg = at91_adc_readl(st, AT91_ADC_MR);
> +		reg &= ~AT91_ADC_PENDBC;
> +		at91_adc_writel(st, AT91_ADC_MR, reg);
> +
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
> +		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_NOPEN
> +				| AT91_ADC_EOC(3));
> +		/* Set up period trigger for sampling */
> +		at91_adc_writel(st, st->registers->trigger_register,
> +			AT91_ADC_TRGR_MOD_PERIOD_TRIG |
> +			AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val));
> +	} else if (status & AT91RL_ADC_IER_NOPEN) {
> +		reg = at91_adc_readl(st, AT91_ADC_MR);
> +		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;
> +		at91_adc_writel(st, AT91_ADC_MR, reg);
> +		at91_adc_writel(st, st->registers->trigger_register,
> +			AT91_ADC_TRGR_NONE);
> +
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_NOPEN
> +				| AT91_ADC_EOC(3));
> +		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);
> +		st->ts_bufferedmeasure = 0;
> +		input_report_key(st->ts_input, BTN_TOUCH, 0);
> +		input_sync(st->ts_input);
> +	} else if (status & AT91_ADC_EOC(3)) {
> +		/* Conversion finished */
> +		if (st->ts_bufferedmeasure) {
> +			/* Last measurement is always discarded, since it can
> +			 * be erroneous.
> +			 * Always report previous measurement */
> +			input_report_abs(st->ts_input, ABS_X, st->ts_prev_absx);
> +			input_report_abs(st->ts_input, ABS_Y, st->ts_prev_absy);
> +			input_report_key(st->ts_input, BTN_TOUCH, 1);
> +			input_sync(st->ts_input);
> +		} else
> +			st->ts_bufferedmeasure = 1;
> +
> +		/* Now make new measurement */
> +		st->ts_prev_absx = at91_adc_readl(st, AT91_ADC_CHAN(st, 3))
> +				   << MAX_RLPOS_BITS;
> +		st->ts_prev_absx /= at91_adc_readl(st, AT91_ADC_CHAN(st, 2));
> +
> +		st->ts_prev_absy = at91_adc_readl(st, AT91_ADC_CHAN(st, 1))
> +				   << MAX_RLPOS_BITS;
> +		st->ts_prev_absy /= at91_adc_readl(st, AT91_ADC_CHAN(st, 0));
> +	}
> +}
> +
> +void handle_adc_9x5_ts_irq(int irq, struct at91_adc_state *st, u32 status)
>   {
> -	struct iio_dev *idev = private;
> -	struct at91_adc_state *st = iio_priv(idev);
> -	u32 status = at91_adc_readl(st, st->registers->status_register);
>   	const uint32_t ts_data_irq_mask =
>   		AT91_ADC_IER_XRDY |
>   		AT91_ADC_IER_YRDY |
>   		AT91_ADC_IER_PRDY;
>
> -	if (status & st->registers->drdy_mask)
> -		handle_adc_eoc_trigger(irq, idev);
> -
>   	if (status & AT91_ADC_IER_PEN) {
>   		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
>   		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_NOPEN |
> @@ -283,6 +335,21 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private)
>   			at91_adc_readl(st, AT91_ADC_TSPRESSR);
>   		}
>   	}
> +}
> +
> +static irqreturn_t at91_adc_interrupt(int irq, void *private)
> +{
> +	struct iio_dev *idev = private;
> +	struct at91_adc_state *st = iio_priv(idev);
> +	u32 status = at91_adc_readl(st, st->registers->status_register);
> +
> +	if (status & st->registers->drdy_mask)
> +		handle_adc_eoc_trigger(irq, idev);
> +
> +	if (st->caps->has_tsmr)
> +		handle_adc_9x5_ts_irq(irq, st, status);
> +	else
> +		handle_adc_rl_ts_irq(irq, st, status);
>
>   	return IRQ_HANDLED;
>   }
> @@ -672,6 +739,8 @@ static int at91_adc_probe_dt_ts(struct device_node *node,
>   		return -EINVAL;
>   	}
>
> +	if (!st->caps->has_tsmr)
> +		return 0;
>   	prop = 0;
>   	of_property_read_u32(node, "atmel,adc-ts-pressure-threshold", &prop);
>   	st->ts_pressure_threshold = prop;
> @@ -795,6 +864,7 @@ static int at91_adc_probe_pdata(struct at91_adc_state *st,
>   	st->trigger_number = pdata->trigger_number;
>   	st->trigger_list = pdata->trigger_list;
>   	st->registers = &st->caps->registers;
> +	st->touchscreen_type = pdata->touchscreen_type;
>
>   	return 0;
>   }
> @@ -809,7 +879,10 @@ static int atmel_ts_open(struct input_dev *dev)
>   {
>   	struct at91_adc_state *st = input_get_drvdata(dev);
>
> -	at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);
> +	if (st->caps->has_tsmr)
> +		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);
> +	else
> +		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);
>   	return 0;
>   }
>
> @@ -817,45 +890,61 @@ static void atmel_ts_close(struct input_dev *dev)
>   {
>   	struct at91_adc_state *st = input_get_drvdata(dev);
>
> -	at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
> +	if (st->caps->has_tsmr)
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);
> +	else
> +		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
>   }
>
>   static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
>   {
> -	u32 reg = 0, pendbc;
> +	u32 reg = 0;
>   	int i = 0;
>
> -	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)
> -		reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS;
> -	else
> -		reg = AT91_ADC_TSMR_TSMODE_5WIRE;
> -
>   	/* a Pen Detect Debounce Time is necessary for the ADC Touch to avoid
>   	 * pen detect noise.
>   	 * The formula is : Pen Detect Debounce Time = (2 ^ pendbc) / ADCClock
>   	 */
> -	pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz / 1000, 1);
> +	st->ts_pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz /
> +				 1000, 1);
>
> -	while (pendbc >> ++i)
> +	while (st->ts_pendbc >> ++i)
>   		;	/* Empty! Find the shift offset */
> -	if (abs(pendbc - (1 << i)) < abs(pendbc - (1 << (i - 1))))
> -		pendbc = i;
> +	if (abs(st->ts_pendbc - (1 << i)) < abs(st->ts_pendbc - (1 << (i - 1))))
> +		st->ts_pendbc = i;
>   	else
> -		pendbc = i - 1;
> +		st->ts_pendbc = i - 1;
>
> -	if (st->caps->has_tsmr) {
> -		reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)
> -				& AT91_ADC_TSMR_TSAV;
> -		reg |= AT91_ADC_TSMR_PENDBC_(pendbc) & AT91_ADC_TSMR_PENDBC;
> -		reg |= AT91_ADC_TSMR_NOTSDMA;
> -		reg |= AT91_ADC_TSMR_PENDET_ENA;
> -		reg |= 0x03 << 8;	/* TSFREQ, need bigger than TSAV */
> -
> -		at91_adc_writel(st, AT91_ADC_TSMR, reg);
> -	} else {
> -		/* TODO: for 9g45 which has no TSMR */
> +	if (!st->caps->has_tsmr) {
> +		reg = at91_adc_readl(st, AT91_ADC_MR);
> +		reg |= AT91_ADC_TSAMOD_TS_ONLY_MODE | AT91_ADC_PENDET;
> +
> +		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;
> +		at91_adc_writel(st, AT91_ADC_MR, reg);
> +
> +		reg = AT91_ADC_TSR_SHTIM_(TOUCH_SHTIM) & AT91_ADC_TSR_SHTIM;
> +		at91_adc_writel(st, AT91_ADC_TSR, reg);
> +
> +		st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US_RL *
> +						    adc_clk_khz / 1000) - 1, 1);
> +
> +		return 0;
>   	}
>
> +	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)
> +		reg = AT91_ADC_TSMR_TSMODE_4WIRE_PRESS;
> +	else
> +		reg = AT91_ADC_TSMR_TSMODE_5WIRE;
> +
> +	reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)
> +	       & AT91_ADC_TSMR_TSAV;
> +	reg |= AT91_ADC_TSMR_PENDBC_(st->ts_pendbc) & AT91_ADC_TSMR_PENDBC;
> +	reg |= AT91_ADC_TSMR_NOTSDMA;
> +	reg |= AT91_ADC_TSMR_PENDET_ENA;
> +	reg |= 0x03 << 8;	/* TSFREQ, needs to be bigger than TSAV */
> +
> +	at91_adc_writel(st, AT91_ADC_TSMR, reg);
> +
>   	/* Change adc internal resistor value for better pen detection,
>   	 * default value is 100 kOhm.
>   	 * 0 = 200 kOhm, 1 = 150 kOhm, 2 = 100 kOhm, 3 = 50 kOhm
> @@ -864,7 +953,7 @@ static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
>   	at91_adc_writel(st, AT91_ADC_ACR, st->caps->ts_pen_detect_sensitivity
>   			& AT91_ADC_ACR_PENDETSENS);
>
> -	/* Sample Peroid Time = (TRGPER + 1) / ADCClock */
> +	/* Sample Period Time = (TRGPER + 1) / ADCClock */
>   	st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US *
>   			adc_clk_khz / 1000) - 1, 1);
>
> @@ -893,17 +982,37 @@ static int at91_ts_register(struct at91_adc_state *st,
>   	__set_bit(EV_ABS, input->evbit);
>   	__set_bit(EV_KEY, input->evbit);
>   	__set_bit(BTN_TOUCH, input->keybit);
> -	input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1, 0, 0);
> -	input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1, 0, 0);
> -	input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0);
> +	if (st->caps->has_tsmr) {
> +		input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1,
> +				     0, 0);
> +		input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1,
> +				     0, 0);
> +		input_set_abs_params(input, ABS_PRESSURE, 0, 0xffffff, 0, 0);
> +	} else {
> +		if (st->touchscreen_type != ATMEL_ADC_TOUCHSCREEN_4WIRE) {
> +			dev_err(&pdev->dev,
> +				"This touchscreen controller only support 4 wires\n");
> +			ret = -EINVAL;
> +			goto err;
> +		}
> +
> +		input_set_abs_params(input, ABS_X, 0, (1 << MAX_RLPOS_BITS) - 1,
> +				     0, 0);
> +		input_set_abs_params(input, ABS_Y, 0, (1 << MAX_RLPOS_BITS) - 1,
> +				     0, 0);
> +	}
>
>   	st->ts_input = input;
>   	input_set_drvdata(input, st);
>
>   	ret = input_register_device(input);
>   	if (ret)
> -		input_free_device(st->ts_input);
> +		goto err;
> +
> +	return ret;
>
> +err:
> +	input_free_device(st->ts_input);
>   	return ret;
>   }
>
> @@ -1070,12 +1179,6 @@ static int at91_adc_probe(struct platform_device *pdev)
>   			goto error_disable_adc_clk;
>   		}
>   	} else {
> -		if (!st->caps->has_tsmr) {
> -			dev_err(&pdev->dev, "We don't support non-TSMR adc\n");
> -			ret = -ENODEV;
> -			goto error_disable_adc_clk;
> -		}
> -
>   		ret = at91_ts_register(st, pdev);
>   		if (ret)
>   			goto error_disable_adc_clk;
> diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
> index fcf73879dbfe..7819fc787731 100644
> --- a/include/linux/platform_data/at91_adc.h
> +++ b/include/linux/platform_data/at91_adc.h
> @@ -7,6 +7,12 @@
>   #ifndef _AT91_ADC_H_
>   #define _AT91_ADC_H_
>
> +enum atmel_adc_ts_type {
This means that the default for existing touch screens (where the platform
data won't include setting this value) will be none.  Is that correct?
> +	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> +	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> +	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> +};
> +
>   /**
>    * struct at91_adc_trigger - description of triggers
>    * @name:		name of the trigger advertised to the user
> @@ -28,6 +34,7 @@ struct at91_adc_trigger {
>    * @trigger_number:		Number of triggers available in the ADC
>    * @use_external_triggers:	does the board has external triggers availables
>    * @vref:			Reference voltage for the ADC in millivolts
> + * @touchscreen_type:		If a touchscreen is connected, its type (4 or 5 wires)
>    */
>   struct at91_adc_data {
>   	unsigned long			channels_used;
> @@ -36,6 +43,7 @@ struct at91_adc_data {
>   	u8				trigger_number;
>   	bool				use_external_triggers;
>   	u16				vref;
> +	enum atmel_adc_ts_type		touchscreen_type;
>   };
>
>   extern void __init at91_add_device_adc(struct at91_adc_data *data);
>

Re: [PATCH 05/15] ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc

[Jonathan Cameron]

On 05/03/14 17:35, Alexandre Belloni wrote:
> at91_adc now supports reading a touchscreen for ADCs without a TSMR register.
> Enable touchscreen support through at91_adc. This allows to use both a
> touchscreen and the remaining ADC channel at the same time.
>
> Also, lower the clock for the ADC as it allows to have more stable reads and
> this is the speed used by atmel_tsadcc.
Are there any side effects on the adc read if that functionality was previously
being used?  I doubt it matters, but probably wants to be mentioned here if there
is.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
>   arch/arm/mach-at91/at91sam9g45.c        | 2 +-
>   arch/arm/mach-at91/board-sam9m10g45ek.c | 1 +
>   2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
> index 2f455ce35268..3c519a7a938f 100644
> --- a/arch/arm/mach-at91/at91sam9g45.c
> +++ b/arch/arm/mach-at91/at91sam9g45.c
> @@ -181,7 +181,7 @@ static struct clk vdec_clk = {
>   static struct clk adc_op_clk = {
>   	.name		= "adc_op_clk",
>   	.type		= CLK_TYPE_PERIPHERAL,
> -	.rate_hz	= 13200000,
> +	.rate_hz	= 300000,
>   };
>
>   /* AES/TDES/SHA clock - Only for sam9m11/sam9g56 */
> diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
> index ef39078c8ce2..4d775b796ce4 100644
> --- a/arch/arm/mach-at91/board-sam9m10g45ek.c
> +++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
> @@ -315,6 +315,7 @@ static struct at91_adc_data ek_adc_data = {
>   	.channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7),
>   	.use_external_triggers = true,
>   	.vref = 3300,
> +	.touchscreen_type = ATMEL_ADC_TOUCHSCREEN_4WIRE,
>   };
>
>   /*
>

Re: [PATCH 14/15] Input: atmel_tsadcc: remove driver

[Jonathan Cameron]

On 05/03/14 18:46, Dmitry Torokhov wrote:
> On Wed, Mar 05, 2014 at 06:35:39PM +0100, Alexandre Belloni wrote:
>> The atmel_tsadcc driver is not used anymore, it has been replaced by at91_adc so
>> remove it.
>>
>> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
>
> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
All the rest of this series looks fine to me.

Dmitry, are you happy for me to take this whole series through IIO once
the last few bits are pinned down?  If the atmel guys want to take the whole
thing through their tree I'm also happy with that.

Not sure what the lowest pain route will be...
>
>> ---
>>   MAINTAINERS                              |   6 -
>>   drivers/input/touchscreen/Kconfig        |  12 --
>>   drivers/input/touchscreen/Makefile       |   1 -
>>   drivers/input/touchscreen/atmel_tsadcc.c | 358 -------------------------------
>>   4 files changed, 377 deletions(-)
>>   delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index c6d0e93eff62..134dd63dfa17 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -1591,12 +1591,6 @@ S:	Supported
>>   F:	drivers/misc/atmel_tclib.c
>>   F:	drivers/clocksource/tcb_clksrc.c
>>
>> -ATMEL TSADCC DRIVER
>> -M:	Josh Wu <josh.wu@atmel.com>
>> -L:	linux-input@vger.kernel.org
>> -S:	Supported
>> -F:	drivers/input/touchscreen/atmel_tsadcc.c
>> -
>>   ATMEL USBA UDC DRIVER
>>   M:	Nicolas Ferre <nicolas.ferre@atmel.com>
>>   L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
>> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
>> index 07e9e82029d1..4090f69e78af 100644
>> --- a/drivers/input/touchscreen/Kconfig
>> +++ b/drivers/input/touchscreen/Kconfig
>> @@ -559,18 +559,6 @@ config TOUCHSCREEN_TI_AM335X_TSC
>>   	  To compile this driver as a module, choose M here: the
>>   	  module will be called ti_am335x_tsc.
>>
>> -config TOUCHSCREEN_ATMEL_TSADCC
>> -	tristate "Atmel Touchscreen Interface"
>> -	depends on ARCH_AT91
>> -	help
>> -	  Say Y here if you have a 4-wire touchscreen connected to the
>> -          ADC Controller on your Atmel SoC.
>> -
>> -	  If unsure, say N.
>> -
>> -	  To compile this driver as a module, choose M here: the
>> -	  module will be called atmel_tsadcc.
>> -
>>   config TOUCHSCREEN_UCB1400
>>   	tristate "Philips UCB1400 touchscreen"
>>   	depends on AC97_BUS
>> diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
>> index 62801f213346..f326a8290593 100644
>> --- a/drivers/input/touchscreen/Makefile
>> +++ b/drivers/input/touchscreen/Makefile
>> @@ -13,7 +13,6 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C)	+= ad7879-i2c.o
>>   obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI)	+= ad7879-spi.o
>>   obj-$(CONFIG_TOUCHSCREEN_ADS7846)	+= ads7846.o
>>   obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT)	+= atmel_mxt_ts.o
>> -obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)	+= atmel_tsadcc.o
>>   obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR)	+= auo-pixcir-ts.o
>>   obj-$(CONFIG_TOUCHSCREEN_BU21013)	+= bu21013_ts.o
>>   obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
>> diff --git a/drivers/input/touchscreen/atmel_tsadcc.c b/drivers/input/touchscreen/atmel_tsadcc.c
>> deleted file mode 100644
>> index a7c9d6967d1e..000000000000
>> --- a/drivers/input/touchscreen/atmel_tsadcc.c
>> +++ /dev/null
>> @@ -1,358 +0,0 @@
>> -/*
>> - *  Atmel Touch Screen Driver
>> - *
>> - *  Copyright (c) 2008 ATMEL
>> - *  Copyright (c) 2008 Dan Liang
>> - *  Copyright (c) 2008 TimeSys Corporation
>> - *  Copyright (c) 2008 Justin Waters
>> - *
>> - *  Based on touchscreen code from Atmel Corporation.
>> - *
>> - *  This program is free software; you can redistribute it and/or modify
>> - *  it under the terms of the GNU General Public License version 2 as
>> - *  published by the Free Software Foundation.
>> - */
>> -#include <linux/err.h>
>> -#include <linux/kernel.h>
>> -#include <linux/module.h>
>> -#include <linux/input.h>
>> -#include <linux/slab.h>
>> -#include <linux/interrupt.h>
>> -#include <linux/clk.h>
>> -#include <linux/platform_device.h>
>> -#include <linux/io.h>
>> -#include <linux/platform_data/atmel.h>
>> -#include <mach/cpu.h>
>> -
>> -/* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */
>> -
>> -#define ATMEL_TSADCC_CR		0x00	/* Control register */
>> -#define   ATMEL_TSADCC_SWRST	(1 << 0)	/* Software Reset*/
>> -#define	  ATMEL_TSADCC_START	(1 << 1)	/* Start conversion */
>> -
>> -#define ATMEL_TSADCC_MR		0x04	/* Mode register */
>> -#define	  ATMEL_TSADCC_TSAMOD	(3    <<  0)	/* ADC mode */
>> -#define	    ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE	(0x0)	/* ADC Mode */
>> -#define	    ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE	(0x1)	/* Touch Screen Only Mode */
>> -#define	  ATMEL_TSADCC_LOWRES	(1    <<  4)	/* Resolution selection */
>> -#define	  ATMEL_TSADCC_SLEEP	(1    <<  5)	/* Sleep mode */
>> -#define	  ATMEL_TSADCC_PENDET	(1    <<  6)	/* Pen Detect selection */
>> -#define	  ATMEL_TSADCC_PRES	(1    <<  7)	/* Pressure Measurement Selection */
>> -#define	  ATMEL_TSADCC_PRESCAL	(0x3f <<  8)	/* Prescalar Rate Selection */
>> -#define	  ATMEL_TSADCC_EPRESCAL	(0xff <<  8)	/* Prescalar Rate Selection (Extended) */
>> -#define	  ATMEL_TSADCC_STARTUP	(0x7f << 16)	/* Start Up time */
>> -#define	  ATMEL_TSADCC_SHTIM	(0xf  << 24)	/* Sample & Hold time */
>> -#define	  ATMEL_TSADCC_PENDBC	(0xf  << 28)	/* Pen Detect debouncing time */
>> -
>> -#define ATMEL_TSADCC_TRGR	0x08	/* Trigger register */
>> -#define	  ATMEL_TSADCC_TRGMOD	(7      <<  0)	/* Trigger mode */
>> -#define	    ATMEL_TSADCC_TRGMOD_NONE		(0 << 0)
>> -#define     ATMEL_TSADCC_TRGMOD_EXT_RISING	(1 << 0)
>> -#define     ATMEL_TSADCC_TRGMOD_EXT_FALLING	(2 << 0)
>> -#define     ATMEL_TSADCC_TRGMOD_EXT_ANY		(3 << 0)
>> -#define     ATMEL_TSADCC_TRGMOD_PENDET		(4 << 0)
>> -#define     ATMEL_TSADCC_TRGMOD_PERIOD		(5 << 0)
>> -#define     ATMEL_TSADCC_TRGMOD_CONTINUOUS	(6 << 0)
>> -#define   ATMEL_TSADCC_TRGPER	(0xffff << 16)	/* Trigger period */
>> -
>> -#define ATMEL_TSADCC_TSR	0x0C	/* Touch Screen register */
>> -#define	  ATMEL_TSADCC_TSFREQ	(0xf <<  0)	/* TS Frequency in Interleaved mode */
>> -#define	  ATMEL_TSADCC_TSSHTIM	(0xf << 24)	/* Sample & Hold time */
>> -
>> -#define ATMEL_TSADCC_CHER	0x10	/* Channel Enable register */
>> -#define ATMEL_TSADCC_CHDR	0x14	/* Channel Disable register */
>> -#define ATMEL_TSADCC_CHSR	0x18	/* Channel Status register */
>> -#define	  ATMEL_TSADCC_CH(n)	(1 << (n))	/* Channel number */
>> -
>> -#define ATMEL_TSADCC_SR		0x1C	/* Status register */
>> -#define	  ATMEL_TSADCC_EOC(n)	(1 << ((n)+0))	/* End of conversion for channel N */
>> -#define	  ATMEL_TSADCC_OVRE(n)	(1 << ((n)+8))	/* Overrun error for channel N */
>> -#define	  ATMEL_TSADCC_DRDY	(1 << 16)	/* Data Ready */
>> -#define	  ATMEL_TSADCC_GOVRE	(1 << 17)	/* General Overrun Error */
>> -#define	  ATMEL_TSADCC_ENDRX	(1 << 18)	/* End of RX Buffer */
>> -#define	  ATMEL_TSADCC_RXBUFF	(1 << 19)	/* TX Buffer full */
>> -#define	  ATMEL_TSADCC_PENCNT	(1 << 20)	/* Pen contact */
>> -#define	  ATMEL_TSADCC_NOCNT	(1 << 21)	/* No contact */
>> -
>> -#define ATMEL_TSADCC_LCDR	0x20	/* Last Converted Data register */
>> -#define	  ATMEL_TSADCC_DATA	(0x3ff << 0)	/* Channel data */
>> -
>> -#define ATMEL_TSADCC_IER	0x24	/* Interrupt Enable register */
>> -#define ATMEL_TSADCC_IDR	0x28	/* Interrupt Disable register */
>> -#define ATMEL_TSADCC_IMR	0x2C	/* Interrupt Mask register */
>> -#define ATMEL_TSADCC_CDR0	0x30	/* Channel Data 0 */
>> -#define ATMEL_TSADCC_CDR1	0x34	/* Channel Data 1 */
>> -#define ATMEL_TSADCC_CDR2	0x38	/* Channel Data 2 */
>> -#define ATMEL_TSADCC_CDR3	0x3C	/* Channel Data 3 */
>> -#define ATMEL_TSADCC_CDR4	0x40	/* Channel Data 4 */
>> -#define ATMEL_TSADCC_CDR5	0x44	/* Channel Data 5 */
>> -
>> -#define ATMEL_TSADCC_XPOS	0x50
>> -#define ATMEL_TSADCC_Z1DAT	0x54
>> -#define ATMEL_TSADCC_Z2DAT	0x58
>> -
>> -#define PRESCALER_VAL(x)	((x) >> 8)
>> -
>> -#define ADC_DEFAULT_CLOCK	100000
>> -
>> -struct atmel_tsadcc {
>> -	struct input_dev	*input;
>> -	char			phys[32];
>> -	struct clk		*clk;
>> -	int			irq;
>> -	unsigned int		prev_absx;
>> -	unsigned int		prev_absy;
>> -	unsigned char		bufferedmeasure;
>> -};
>> -
>> -static void __iomem		*tsc_base;
>> -
>> -#define atmel_tsadcc_read(reg)		__raw_readl(tsc_base + (reg))
>> -#define atmel_tsadcc_write(reg, val)	__raw_writel((val), tsc_base + (reg))
>> -
>> -static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev)
>> -{
>> -	struct atmel_tsadcc	*ts_dev = (struct atmel_tsadcc *)dev;
>> -	struct input_dev	*input_dev = ts_dev->input;
>> -
>> -	unsigned int status;
>> -	unsigned int reg;
>> -
>> -	status = atmel_tsadcc_read(ATMEL_TSADCC_SR);
>> -	status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR);
>> -
>> -	if (status & ATMEL_TSADCC_NOCNT) {
>> -		/* Contact lost */
>> -		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC;
>> -
>> -		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
>> -		atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
>> -		atmel_tsadcc_write(ATMEL_TSADCC_IDR,
>> -				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
>> -		atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
>> -
>> -		input_report_key(input_dev, BTN_TOUCH, 0);
>> -		ts_dev->bufferedmeasure = 0;
>> -		input_sync(input_dev);
>> -
>> -	} else if (status & ATMEL_TSADCC_PENCNT) {
>> -		/* Pen detected */
>> -		reg = atmel_tsadcc_read(ATMEL_TSADCC_MR);
>> -		reg &= ~ATMEL_TSADCC_PENDBC;
>> -
>> -		atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT);
>> -		atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
>> -		atmel_tsadcc_write(ATMEL_TSADCC_IER,
>> -				   ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
>> -		atmel_tsadcc_write(ATMEL_TSADCC_TRGR,
>> -				   ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16));
>> -
>> -	} else if (status & ATMEL_TSADCC_EOC(3)) {
>> -		/* Conversion finished */
>> -
>> -		if (ts_dev->bufferedmeasure) {
>> -			/* Last measurement is always discarded, since it can
>> -			 * be erroneous.
>> -			 * Always report previous measurement */
>> -			input_report_abs(input_dev, ABS_X, ts_dev->prev_absx);
>> -			input_report_abs(input_dev, ABS_Y, ts_dev->prev_absy);
>> -			input_report_key(input_dev, BTN_TOUCH, 1);
>> -			input_sync(input_dev);
>> -		} else
>> -			ts_dev->bufferedmeasure = 1;
>> -
>> -		/* Now make new measurement */
>> -		ts_dev->prev_absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10;
>> -		ts_dev->prev_absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2);
>> -
>> -		ts_dev->prev_absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10;
>> -		ts_dev->prev_absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0);
>> -	}
>> -
>> -	return IRQ_HANDLED;
>> -}
>> -
>> -/*
>> - * The functions for inserting/removing us as a module.
>> - */
>> -
>> -static int atmel_tsadcc_probe(struct platform_device *pdev)
>> -{
>> -	struct atmel_tsadcc	*ts_dev;
>> -	struct input_dev	*input_dev;
>> -	struct resource		*res;
>> -	struct at91_tsadcc_data *pdata = dev_get_platdata(&pdev->dev);
>> -	int		err;
>> -	unsigned int	prsc;
>> -	unsigned int	reg;
>> -
>> -	if (!pdata)
>> -		return -EINVAL;
>> -
>> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> -	if (!res) {
>> -		dev_err(&pdev->dev, "no mmio resource defined.\n");
>> -		return -ENXIO;
>> -	}
>> -
>> -	/* Allocate memory for device */
>> -	ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL);
>> -	if (!ts_dev) {
>> -		dev_err(&pdev->dev, "failed to allocate memory.\n");
>> -		return -ENOMEM;
>> -	}
>> -	platform_set_drvdata(pdev, ts_dev);
>> -
>> -	input_dev = input_allocate_device();
>> -	if (!input_dev) {
>> -		dev_err(&pdev->dev, "failed to allocate input device.\n");
>> -		err = -EBUSY;
>> -		goto err_free_mem;
>> -	}
>> -
>> -	ts_dev->irq = platform_get_irq(pdev, 0);
>> -	if (ts_dev->irq < 0) {
>> -		dev_err(&pdev->dev, "no irq ID is designated.\n");
>> -		err = -ENODEV;
>> -		goto err_free_dev;
>> -	}
>> -
>> -	if (!request_mem_region(res->start, resource_size(res),
>> -				"atmel tsadcc regs")) {
>> -		dev_err(&pdev->dev, "resources is unavailable.\n");
>> -		err = -EBUSY;
>> -		goto err_free_dev;
>> -	}
>> -
>> -	tsc_base = ioremap(res->start, resource_size(res));
>> -	if (!tsc_base) {
>> -		dev_err(&pdev->dev, "failed to map registers.\n");
>> -		err = -ENOMEM;
>> -		goto err_release_mem;
>> -	}
>> -
>> -	err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, 0,
>> -			pdev->dev.driver->name, ts_dev);
>> -	if (err) {
>> -		dev_err(&pdev->dev, "failed to allocate irq.\n");
>> -		goto err_unmap_regs;
>> -	}
>> -
>> -	ts_dev->clk = clk_get(&pdev->dev, "tsc_clk");
>> -	if (IS_ERR(ts_dev->clk)) {
>> -		dev_err(&pdev->dev, "failed to get ts_clk\n");
>> -		err = PTR_ERR(ts_dev->clk);
>> -		goto err_free_irq;
>> -	}
>> -
>> -	ts_dev->input = input_dev;
>> -	ts_dev->bufferedmeasure = 0;
>> -
>> -	snprintf(ts_dev->phys, sizeof(ts_dev->phys),
>> -		 "%s/input0", dev_name(&pdev->dev));
>> -
>> -	input_dev->name = "atmel touch screen controller";
>> -	input_dev->phys = ts_dev->phys;
>> -	input_dev->dev.parent = &pdev->dev;
>> -
>> -	__set_bit(EV_ABS, input_dev->evbit);
>> -	input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0);
>> -	input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0);
>> -
>> -	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
>> -
>> -	/* clk_enable() always returns 0, no need to check it */
>> -	clk_enable(ts_dev->clk);
>> -
>> -	prsc = clk_get_rate(ts_dev->clk);
>> -	dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc);
>> -
>> -	if (!pdata->adc_clock)
>> -		pdata->adc_clock = ADC_DEFAULT_CLOCK;
>> -
>> -	prsc = (prsc / (2 * pdata->adc_clock)) - 1;
>> -
>> -	/* saturate if this value is too high */
>> -	if (cpu_is_at91sam9rl()) {
>> -		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_PRESCAL))
>> -			prsc = PRESCALER_VAL(ATMEL_TSADCC_PRESCAL);
>> -	} else {
>> -		if (prsc > PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL))
>> -			prsc = PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL);
>> -	}
>> -
>> -	dev_info(&pdev->dev, "Prescaler is set at: %d\n", prsc);
>> -
>> -	reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE		|
>> -		((0x00 << 5) & ATMEL_TSADCC_SLEEP)	|	/* Normal Mode */
>> -		((0x01 << 6) & ATMEL_TSADCC_PENDET)	|	/* Enable Pen Detect */
>> -		(prsc << 8)				|
>> -		((0x26 << 16) & ATMEL_TSADCC_STARTUP)	|
>> -		((pdata->pendet_debounce << 28) & ATMEL_TSADCC_PENDBC);
>> -
>> -	atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST);
>> -	atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
>> -	atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
>> -	atmel_tsadcc_write(ATMEL_TSADCC_TSR,
>> -		(pdata->ts_sample_hold_time << 24) & ATMEL_TSADCC_TSSHTIM);
>> -
>> -	atmel_tsadcc_read(ATMEL_TSADCC_SR);
>> -	atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
>> -
>> -	/* All went ok, so register to the input system */
>> -	err = input_register_device(input_dev);
>> -	if (err)
>> -		goto err_fail;
>> -
>> -	return 0;
>> -
>> -err_fail:
>> -	clk_disable(ts_dev->clk);
>> -	clk_put(ts_dev->clk);
>> -err_free_irq:
>> -	free_irq(ts_dev->irq, ts_dev);
>> -err_unmap_regs:
>> -	iounmap(tsc_base);
>> -err_release_mem:
>> -	release_mem_region(res->start, resource_size(res));
>> -err_free_dev:
>> -	input_free_device(input_dev);
>> -err_free_mem:
>> -	kfree(ts_dev);
>> -	return err;
>> -}
>> -
>> -static int atmel_tsadcc_remove(struct platform_device *pdev)
>> -{
>> -	struct atmel_tsadcc *ts_dev = platform_get_drvdata(pdev);
>> -	struct resource *res;
>> -
>> -	free_irq(ts_dev->irq, ts_dev);
>> -
>> -	input_unregister_device(ts_dev->input);
>> -
>> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> -	iounmap(tsc_base);
>> -	release_mem_region(res->start, resource_size(res));
>> -
>> -	clk_disable(ts_dev->clk);
>> -	clk_put(ts_dev->clk);
>> -
>> -	kfree(ts_dev);
>> -
>> -	return 0;
>> -}
>> -
>> -static struct platform_driver atmel_tsadcc_driver = {
>> -	.probe		= atmel_tsadcc_probe,
>> -	.remove		= atmel_tsadcc_remove,
>> -	.driver		= {
>> -		.name	= "atmel_tsadcc",
>> -	},
>> -};
>> -module_platform_driver(atmel_tsadcc_driver);
>> -
>> -MODULE_LICENSE("GPL");
>> -MODULE_DESCRIPTION("Atmel TouchScreen Driver");
>> -MODULE_AUTHOR("Dan Liang <dan.liang@atmel.com>");
>> -
>> --
>> 1.8.3.2
>>
>

Re: [PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[Jonathan Cameron]

On 05/03/14 17:35, Alexandre Belloni wrote:
> This patch set is a followup of my previous series: iio: adc: at91 fixes
>
> I'm sorry it is so long, I made sure this is bissectable.
It's a nice series, don't apologise for doing things right!

Clearly there are a few outstanding snippets from the reviews so far, but we
are getting to the point where we need to agree on a path for this.  I'm
happy to take the whole series through the IIO tree if Dmitry and the at91
maintainers are happy with that.  If it is considered two invasive form the
atmel side then I'm perfectly happy with someone to take it through the relevant
platform tree instead.

I'm obviously not going to pick it up at all until it has a complete set
of at91 maintainer acks though!

Realistically it's missed the coming merge window anyway, so we have a fair
bit of time.

Jonathan
>
> 1-3) The first 3 patches are cleaning up the patform_data used for at91_adc.
>
> 4-5) Then touchscreen support for older ADCs is added, this allows to use that
>       for the sam9m10g45ek.
>
> 6) Following those modifications, the mach/at91_adc.h is not used anywhere but
>     in the at91_adc driver so it is remove and its content (register definitions)
>     placed directly in the driver.
>
> 7-9) at91sam9rl support is added to at91_adc and is used for the at91sam9rl
>       based boards.
>
> 10-11) Prepare the atmel_tsadcc removal by switching sam9rl and sam9g45 to use
>         only at91_adc instead of atmel_tsadcc.
>
> 12-15) atmel_tsadcc removal
>
>
> Alexandre Belloni (15):
>    ARM: at91: sam9g45: remove unused platform_data
>    ARM: at91: sam9260: remove unused platform_data
>    iio: adc: at91: cleanup platform_data
>    iio: adc: at91_adc: Add support for touchscreens without TSMR
>    ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc
>    iio: adc: at91: remove unused include from include/mach
>    iio: adc: at91: add sam9rl support
>    ARM: at91: sam9rl: add at91_adc to support adc and touchscreen
>    ARM: at91: sam9rlek add touchscreen support through at91_adc
>    ARM: at91: sam9g45: switch from atmel_tsadcc to at91_adc
>    ARM: at91: sam9rl: switch from atmel_tsadcc to at91_adc
>    ARM: at91: remove atmel_tsadcc platform_data
>    ARM: at91: remove atmel_tsadcc from sama5_defconfig
>    Input: atmel_tsadcc: remove driver
>    ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node
>
>   MAINTAINERS                                |   6 -
>   arch/arm/boot/dts/at91-cosino_mega2560.dts |   5 -
>   arch/arm/configs/at91sam9g45_defconfig     |   3 +-
>   arch/arm/configs/at91sam9rl_defconfig      |   3 +-
>   arch/arm/configs/sama5_defconfig           |   1 -
>   arch/arm/mach-at91/at91sam9260_devices.c   |  10 -
>   arch/arm/mach-at91/at91sam9g45.c           |   2 +-
>   arch/arm/mach-at91/at91sam9g45_devices.c   |  63 +----
>   arch/arm/mach-at91/at91sam9rl.c            |   7 +
>   arch/arm/mach-at91/at91sam9rl_devices.c    |  83 +++++--
>   arch/arm/mach-at91/board-sam9m10g45ek.c    |  16 +-
>   arch/arm/mach-at91/board-sam9rlek.c        |  16 +-
>   arch/arm/mach-at91/board.h                 |   3 -
>   arch/arm/mach-at91/include/mach/at91_adc.h | 107 ---------
>   drivers/iio/adc/at91_adc.c                 | 339 +++++++++++++++++++++++----
>   drivers/input/touchscreen/Kconfig          |  12 -
>   drivers/input/touchscreen/Makefile         |   1 -
>   drivers/input/touchscreen/atmel_tsadcc.c   | 358 -----------------------------
>   include/linux/platform_data/at91_adc.h     |  27 +--
>   include/linux/platform_data/atmel.h        |   7 -
>   20 files changed, 380 insertions(+), 689 deletions(-)
>   delete mode 100644 arch/arm/mach-at91/include/mach/at91_adc.h
>   delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c
>

Re: [PATCH 04/15] iio: adc: at91_adc: Add support for touchscreens without TSMR

[Alexandre Belloni]

On 16/03/2014 at 18:16:54 +0000, Jonathan Cameron wrote :
> On 05/03/14 17:35, Alexandre Belloni wrote:
> >Old ADCs, as present on the sam9rl and the sam9g45 don't have a TSMR register
> >and the touchscreen support should be handled differently.
> >
> >Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> One comment inline about handling of devices where the platform data doesn't
> include the touchscreen type.  I'd expect zero to be the current default
> rather than NONE...
> >diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
> >index fcf73879dbfe..7819fc787731 100644
> >--- a/include/linux/platform_data/at91_adc.h
> >+++ b/include/linux/platform_data/at91_adc.h
> >@@ -7,6 +7,12 @@
> >  #ifndef _AT91_ADC_H_
> >  #define _AT91_ADC_H_
> >
> >+enum atmel_adc_ts_type {
> This means that the default for existing touch screens (where the platform
> data won't include setting this value) will be none.  Is that correct?
> >+	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> >+	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> >+	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> >+};
> >+

This is actually just a snippet that I moved from at91_adc.c to
at91_adc.h. I followed the current behavior.  Until now, using the
touchscreen was only supported through device tree and touchscreen
handling was not activated unless the atmel,adc-ts-wires property is
present.  I guess this is the sane way to go because when you use the
touchscreen, you lose the triggers.


-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Re: [PATCH 14/15] Input: atmel_tsadcc: remove driver

[Dmitry Torokhov]

On Sunday, March 16, 2014 06:26:43 PM Jonathan Cameron wrote:
> On 05/03/14 18:46, Dmitry Torokhov wrote:
> > On Wed, Mar 05, 2014 at 06:35:39PM +0100, Alexandre Belloni wrote:
> >> The atmel_tsadcc driver is not used anymore, it has been replaced by
> >> at91_adc so remove it.
> >> 
> >> Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> > 
> > Acked-by: Dmitry Torokhov <dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> 
> All the rest of this series looks fine to me.
> 
> Dmitry, are you happy for me to take this whole series through IIO once
> the last few bits are pinned down?  If the atmel guys want to take the whole
> thing through their tree I'm also happy with that.
> 
> Not sure what the lowest pain route will be...

Jonathan,

I am fine with either one of these 2 options.

Thanks.

-- 
Dmitry

Re: [PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[Alexandre Belloni]

Hi,

On 16/03/2014 at 18:30:07 +0000, Jonathan Cameron wrote :
> On 05/03/14 17:35, Alexandre Belloni wrote:
> >This patch set is a followup of my previous series: iio: adc: at91 fixes
> >
> >I'm sorry it is so long, I made sure this is bissectable.
> It's a nice series, don't apologise for doing things right!
> 
> Clearly there are a few outstanding snippets from the reviews so far, but we
> are getting to the point where we need to agree on a path for this.  I'm
> happy to take the whole series through the IIO tree if Dmitry and the at91
> maintainers are happy with that.  If it is considered two invasive form the
> atmel side then I'm perfectly happy with someone to take it through the relevant
> platform tree instead.
> 
> I'm obviously not going to pick it up at all until it has a complete set
> of at91 maintainer acks though!
> 

Thank you for your review.

I already have a v2 ready addressing the received comments. I was mostly
waiting on your feedback and you seem happy with it. I'll send an update
on monday with the collected acks.

I'll let the at91 maintainer ack it and decide on the path.

> Realistically it's missed the coming merge window anyway, so we have a fair
> bit of time.
> 

That's why I've separated that series from the other fixes, this was not
as urgent.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Re: [PATCH 05/15] ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc

[Alexandre Belloni]

On 16/03/2014 at 18:18:41 +0000, Jonathan Cameron wrote :
> On 05/03/14 17:35, Alexandre Belloni wrote:
> >at91_adc now supports reading a touchscreen for ADCs without a TSMR register.
> >Enable touchscreen support through at91_adc. This allows to use both a
> >touchscreen and the remaining ADC channel at the same time.
> >
> >Also, lower the clock for the ADC as it allows to have more stable reads and
> >this is the speed used by atmel_tsadcc.
> Are there any side effects on the adc read if that functionality was previously
> being used?  I doubt it matters, but probably wants to be mentioned here if there
> is.

Hum, it lowers the throughput rate but I really doubt anyone is trying
to achieve 440000 samples per second under linux ;) At that frequency,
we are still able to achieve 12958 samples per second so I guess this is
fine as from my experience, the CPU can't really keep up when reading
500 samples per seconds. I will include that in the commit log.

> >Signed-off-by: Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> >---
> >  arch/arm/mach-at91/at91sam9g45.c        | 2 +-
> >  arch/arm/mach-at91/board-sam9m10g45ek.c | 1 +
> >  2 files changed, 2 insertions(+), 1 deletion(-)
> >
> >diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
> >index 2f455ce35268..3c519a7a938f 100644
> >--- a/arch/arm/mach-at91/at91sam9g45.c
> >+++ b/arch/arm/mach-at91/at91sam9g45.c
> >@@ -181,7 +181,7 @@ static struct clk vdec_clk = {
> >  static struct clk adc_op_clk = {
> >  	.name		= "adc_op_clk",
> >  	.type		= CLK_TYPE_PERIPHERAL,
> >-	.rate_hz	= 13200000,
> >+	.rate_hz	= 300000,
> >  };
> >
> >  /* AES/TDES/SHA clock - Only for sam9m11/sam9g56 */
> >diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
> >index ef39078c8ce2..4d775b796ce4 100644
> >--- a/arch/arm/mach-at91/board-sam9m10g45ek.c
> >+++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
> >@@ -315,6 +315,7 @@ static struct at91_adc_data ek_adc_data = {
> >  	.channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7),
> >  	.use_external_triggers = true,
> >  	.vref = 3300,
> >+	.touchscreen_type = ATMEL_ADC_TOUCHSCREEN_4WIRE,
> >  };
> >
> >  /*
> >
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Re: [PATCH 04/15] iio: adc: at91_adc: Add support for touchscreens without TSMR

[Jonathan Cameron]

On March 16, 2014 7:16:39 PM GMT+00:00, Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>On 16/03/2014 at 18:16:54 +0000, Jonathan Cameron wrote :
>> On 05/03/14 17:35, Alexandre Belloni wrote:
>> >Old ADCs, as present on the sam9rl and the sam9g45 don't have a TSMR
>register
>> >and the touchscreen support should be handled differently.
>> >
>> >Signed-off-by: Alexandre Belloni
><alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
>> One comment inline about handling of devices where the platform data
>doesn't
>> include the touchscreen type.  I'd expect zero to be the current
>default
>> rather than NONE...
>> >diff --git a/include/linux/platform_data/at91_adc.h
>b/include/linux/platform_data/at91_adc.h
>> >index fcf73879dbfe..7819fc787731 100644
>> >--- a/include/linux/platform_data/at91_adc.h
>> >+++ b/include/linux/platform_data/at91_adc.h
>> >@@ -7,6 +7,12 @@
>> >  #ifndef _AT91_ADC_H_
>> >  #define _AT91_ADC_H_
>> >
>> >+enum atmel_adc_ts_type {
>> This means that the default for existing touch screens (where the
>platform
>> data won't include setting this value) will be none.  Is that
>correct?
>> >+	ATMEL_ADC_TOUCHSCREEN_NONE = 0,
>> >+	ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
>> >+	ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
>> >+};
>> >+
>
>This is actually just a snippet that I moved from at91_adc.c to
>at91_adc.h. I followed the current behavior.  Until now, using the
>touchscreen was only supported through device tree and touchscreen
>handling was not activated unless the atmel,adc-ts-wires property is
>present.  I guess this is the sane way to go because when you use the
>touchscreen, you lose the triggers.
Ah. Thanks for clearing that up. I missed that it previously existed entirely..

-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

Re: [PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[Nicolas Ferre]

On 16/03/2014 19:30, Jonathan Cameron :
> On 05/03/14 17:35, Alexandre Belloni wrote:
>> This patch set is a followup of my previous series: iio: adc: at91 fixes
>>
>> I'm sorry it is so long, I made sure this is bissectable.
> It's a nice series, don't apologise for doing things right!
> 
> Clearly there are a few outstanding snippets from the reviews so far, but we
> are getting to the point where we need to agree on a path for this.  I'm
> happy to take the whole series through the IIO tree if Dmitry and the at91
> maintainers are happy with that.  If it is considered two invasive form the
> atmel side then I'm perfectly happy with someone to take it through the relevant
> platform tree instead.

Jonathan, Dmitry,

Considering the amount of AT91 files touched by this series, I would
like to take everything through Atmel's git tree and later on arm-soc.


> I'm obviously not going to pick it up at all until it has a complete set
> of at91 maintainer acks though!
> 
> Realistically it's missed the coming merge window anyway, so we have a fair
> bit of time.

Yes, I will review Alexandre's v2 series.

Thanks a lot for your review and for having thought about the path that
these patches would take.

Bye,


> Jonathan
>>
>> 1-3) The first 3 patches are cleaning up the patform_data used for at91_adc.
>>
>> 4-5) Then touchscreen support for older ADCs is added, this allows to use that
>>       for the sam9m10g45ek.
>>
>> 6) Following those modifications, the mach/at91_adc.h is not used anywhere but
>>     in the at91_adc driver so it is remove and its content (register definitions)
>>     placed directly in the driver.
>>
>> 7-9) at91sam9rl support is added to at91_adc and is used for the at91sam9rl
>>       based boards.
>>
>> 10-11) Prepare the atmel_tsadcc removal by switching sam9rl and sam9g45 to use
>>         only at91_adc instead of atmel_tsadcc.
>>
>> 12-15) atmel_tsadcc removal
>>
>>
>> Alexandre Belloni (15):
>>    ARM: at91: sam9g45: remove unused platform_data
>>    ARM: at91: sam9260: remove unused platform_data
>>    iio: adc: at91: cleanup platform_data
>>    iio: adc: at91_adc: Add support for touchscreens without TSMR
>>    ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc
>>    iio: adc: at91: remove unused include from include/mach
>>    iio: adc: at91: add sam9rl support
>>    ARM: at91: sam9rl: add at91_adc to support adc and touchscreen
>>    ARM: at91: sam9rlek add touchscreen support through at91_adc
>>    ARM: at91: sam9g45: switch from atmel_tsadcc to at91_adc
>>    ARM: at91: sam9rl: switch from atmel_tsadcc to at91_adc
>>    ARM: at91: remove atmel_tsadcc platform_data
>>    ARM: at91: remove atmel_tsadcc from sama5_defconfig
>>    Input: atmel_tsadcc: remove driver
>>    ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node
>>
>>   MAINTAINERS                                |   6 -
>>   arch/arm/boot/dts/at91-cosino_mega2560.dts |   5 -
>>   arch/arm/configs/at91sam9g45_defconfig     |   3 +-
>>   arch/arm/configs/at91sam9rl_defconfig      |   3 +-
>>   arch/arm/configs/sama5_defconfig           |   1 -
>>   arch/arm/mach-at91/at91sam9260_devices.c   |  10 -
>>   arch/arm/mach-at91/at91sam9g45.c           |   2 +-
>>   arch/arm/mach-at91/at91sam9g45_devices.c   |  63 +----
>>   arch/arm/mach-at91/at91sam9rl.c            |   7 +
>>   arch/arm/mach-at91/at91sam9rl_devices.c    |  83 +++++--
>>   arch/arm/mach-at91/board-sam9m10g45ek.c    |  16 +-
>>   arch/arm/mach-at91/board-sam9rlek.c        |  16 +-
>>   arch/arm/mach-at91/board.h                 |   3 -
>>   arch/arm/mach-at91/include/mach/at91_adc.h | 107 ---------
>>   drivers/iio/adc/at91_adc.c                 | 339 +++++++++++++++++++++++----
>>   drivers/input/touchscreen/Kconfig          |  12 -
>>   drivers/input/touchscreen/Makefile         |   1 -
>>   drivers/input/touchscreen/atmel_tsadcc.c   | 358 -----------------------------
>>   include/linux/platform_data/at91_adc.h     |  27 +--
>>   include/linux/platform_data/atmel.h        |   7 -
>>   20 files changed, 380 insertions(+), 689 deletions(-)
>>   delete mode 100644 arch/arm/mach-at91/include/mach/at91_adc.h
>>   delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c
>>
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 


-- 
Nicolas Ferre

Re: [PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[Jonathan Cameron]

On 19/03/14 10:19, Nicolas Ferre wrote:
> On 16/03/2014 19:30, Jonathan Cameron :
>> On 05/03/14 17:35, Alexandre Belloni wrote:
>>> This patch set is a followup of my previous series: iio: adc: at91 fixes
>>>
>>> I'm sorry it is so long, I made sure this is bissectable.
>> It's a nice series, don't apologise for doing things right!
>>
>> Clearly there are a few outstanding snippets from the reviews so far, but we
>> are getting to the point where we need to agree on a path for this.  I'm
>> happy to take the whole series through the IIO tree if Dmitry and the at91
>> maintainers are happy with that.  If it is considered two invasive form the
>> atmel side then I'm perfectly happy with someone to take it through the relevant
>> platform tree instead.
>
> Jonathan, Dmitry,
>
> Considering the amount of AT91 files touched by this series, I would
> like to take everything through Atmel's git tree and later on arm-soc.
Sure. Just as a warning, there are one or two patches queued up already that this
sits on top of.  Give a spot of bad timing these are too late to go in as fixes
before the release. Might be worth waiting on those hitting Linus' tree sometime
after rc1 before taking this series.
>
>
>> I'm obviously not going to pick it up at all until it has a complete set
>> of at91 maintainer acks though!
>>
>> Realistically it's missed the coming merge window anyway, so we have a fair
>> bit of time.
>
> Yes, I will review Alexandre's v2 series.
>
> Thanks a lot for your review and for having thought about the path that
> these patches would take.
>
> Bye,
>
>
>> Jonathan
>>>
>>> 1-3) The first 3 patches are cleaning up the patform_data used for at91_adc.
>>>
>>> 4-5) Then touchscreen support for older ADCs is added, this allows to use that
>>>        for the sam9m10g45ek.
>>>
>>> 6) Following those modifications, the mach/at91_adc.h is not used anywhere but
>>>      in the at91_adc driver so it is remove and its content (register definitions)
>>>      placed directly in the driver.
>>>
>>> 7-9) at91sam9rl support is added to at91_adc and is used for the at91sam9rl
>>>        based boards.
>>>
>>> 10-11) Prepare the atmel_tsadcc removal by switching sam9rl and sam9g45 to use
>>>          only at91_adc instead of atmel_tsadcc.
>>>
>>> 12-15) atmel_tsadcc removal
>>>
>>>
>>> Alexandre Belloni (15):
>>>     ARM: at91: sam9g45: remove unused platform_data
>>>     ARM: at91: sam9260: remove unused platform_data
>>>     iio: adc: at91: cleanup platform_data
>>>     iio: adc: at91_adc: Add support for touchscreens without TSMR
>>>     ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc
>>>     iio: adc: at91: remove unused include from include/mach
>>>     iio: adc: at91: add sam9rl support
>>>     ARM: at91: sam9rl: add at91_adc to support adc and touchscreen
>>>     ARM: at91: sam9rlek add touchscreen support through at91_adc
>>>     ARM: at91: sam9g45: switch from atmel_tsadcc to at91_adc
>>>     ARM: at91: sam9rl: switch from atmel_tsadcc to at91_adc
>>>     ARM: at91: remove atmel_tsadcc platform_data
>>>     ARM: at91: remove atmel_tsadcc from sama5_defconfig
>>>     Input: atmel_tsadcc: remove driver
>>>     ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node
>>>
>>>    MAINTAINERS                                |   6 -
>>>    arch/arm/boot/dts/at91-cosino_mega2560.dts |   5 -
>>>    arch/arm/configs/at91sam9g45_defconfig     |   3 +-
>>>    arch/arm/configs/at91sam9rl_defconfig      |   3 +-
>>>    arch/arm/configs/sama5_defconfig           |   1 -
>>>    arch/arm/mach-at91/at91sam9260_devices.c   |  10 -
>>>    arch/arm/mach-at91/at91sam9g45.c           |   2 +-
>>>    arch/arm/mach-at91/at91sam9g45_devices.c   |  63 +----
>>>    arch/arm/mach-at91/at91sam9rl.c            |   7 +
>>>    arch/arm/mach-at91/at91sam9rl_devices.c    |  83 +++++--
>>>    arch/arm/mach-at91/board-sam9m10g45ek.c    |  16 +-
>>>    arch/arm/mach-at91/board-sam9rlek.c        |  16 +-
>>>    arch/arm/mach-at91/board.h                 |   3 -
>>>    arch/arm/mach-at91/include/mach/at91_adc.h | 107 ---------
>>>    drivers/iio/adc/at91_adc.c                 | 339 +++++++++++++++++++++++----
>>>    drivers/input/touchscreen/Kconfig          |  12 -
>>>    drivers/input/touchscreen/Makefile         |   1 -
>>>    drivers/input/touchscreen/atmel_tsadcc.c   | 358 -----------------------------
>>>    include/linux/platform_data/at91_adc.h     |  27 +--
>>>    include/linux/platform_data/atmel.h        |   7 -
>>>    20 files changed, 380 insertions(+), 689 deletions(-)
>>>    delete mode 100644 arch/arm/mach-at91/include/mach/at91_adc.h
>>>    delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c
>>>
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>
>
>

Re: [PATCH 00/15] iio: adc: at91 cleanups and atmel_tsadcc removal

[Nicolas Ferre]

On 22/03/2014 13:31, Jonathan Cameron :
> On 19/03/14 10:19, Nicolas Ferre wrote:
>> On 16/03/2014 19:30, Jonathan Cameron :
>>> On 05/03/14 17:35, Alexandre Belloni wrote:
>>>> This patch set is a followup of my previous series: iio: adc: at91 fixes
>>>>
>>>> I'm sorry it is so long, I made sure this is bissectable.
>>> It's a nice series, don't apologise for doing things right!
>>>
>>> Clearly there are a few outstanding snippets from the reviews so far, but we
>>> are getting to the point where we need to agree on a path for this.  I'm
>>> happy to take the whole series through the IIO tree if Dmitry and the at91
>>> maintainers are happy with that.  If it is considered two invasive form the
>>> atmel side then I'm perfectly happy with someone to take it through the relevant
>>> platform tree instead.
>>
>> Jonathan, Dmitry,
>>
>> Considering the amount of AT91 files touched by this series, I would
>> like to take everything through Atmel's git tree and later on arm-soc.
> Sure. Just as a warning, there are one or two patches queued up already that this
> sits on top of.  Give a spot of bad timing these are too late to go in as fixes
> before the release. Might be worth waiting on those hitting Linus' tree sometime
> after rc1 before taking this series.

Okay, advice well-noted.

Thanks Jonathan.

>>> I'm obviously not going to pick it up at all until it has a complete set
>>> of at91 maintainer acks though!
>>>
>>> Realistically it's missed the coming merge window anyway, so we have a fair
>>> bit of time.
>>
>> Yes, I will review Alexandre's v2 series.
>>
>> Thanks a lot for your review and for having thought about the path that
>> these patches would take.
>>
>> Bye,
>>
>>
>>> Jonathan
>>>>
>>>> 1-3) The first 3 patches are cleaning up the patform_data used for at91_adc.
>>>>
>>>> 4-5) Then touchscreen support for older ADCs is added, this allows to use that
>>>>        for the sam9m10g45ek.
>>>>
>>>> 6) Following those modifications, the mach/at91_adc.h is not used anywhere but
>>>>      in the at91_adc driver so it is remove and its content (register definitions)
>>>>      placed directly in the driver.
>>>>
>>>> 7-9) at91sam9rl support is added to at91_adc and is used for the at91sam9rl
>>>>        based boards.
>>>>
>>>> 10-11) Prepare the atmel_tsadcc removal by switching sam9rl and sam9g45 to use
>>>>          only at91_adc instead of atmel_tsadcc.
>>>>
>>>> 12-15) atmel_tsadcc removal
>>>>
>>>>
>>>> Alexandre Belloni (15):
>>>>     ARM: at91: sam9g45: remove unused platform_data
>>>>     ARM: at91: sam9260: remove unused platform_data
>>>>     iio: adc: at91: cleanup platform_data
>>>>     iio: adc: at91_adc: Add support for touchscreens without TSMR
>>>>     ARM: at91: sam9m10g45ek: Add touchscreen support through at91_adc
>>>>     iio: adc: at91: remove unused include from include/mach
>>>>     iio: adc: at91: add sam9rl support
>>>>     ARM: at91: sam9rl: add at91_adc to support adc and touchscreen
>>>>     ARM: at91: sam9rlek add touchscreen support through at91_adc
>>>>     ARM: at91: sam9g45: switch from atmel_tsadcc to at91_adc
>>>>     ARM: at91: sam9rl: switch from atmel_tsadcc to at91_adc
>>>>     ARM: at91: remove atmel_tsadcc platform_data
>>>>     ARM: at91: remove atmel_tsadcc from sama5_defconfig
>>>>     Input: atmel_tsadcc: remove driver
>>>>     ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node
>>>>
>>>>    MAINTAINERS                                |   6 -
>>>>    arch/arm/boot/dts/at91-cosino_mega2560.dts |   5 -
>>>>    arch/arm/configs/at91sam9g45_defconfig     |   3 +-
>>>>    arch/arm/configs/at91sam9rl_defconfig      |   3 +-
>>>>    arch/arm/configs/sama5_defconfig           |   1 -
>>>>    arch/arm/mach-at91/at91sam9260_devices.c   |  10 -
>>>>    arch/arm/mach-at91/at91sam9g45.c           |   2 +-
>>>>    arch/arm/mach-at91/at91sam9g45_devices.c   |  63 +----
>>>>    arch/arm/mach-at91/at91sam9rl.c            |   7 +
>>>>    arch/arm/mach-at91/at91sam9rl_devices.c    |  83 +++++--
>>>>    arch/arm/mach-at91/board-sam9m10g45ek.c    |  16 +-
>>>>    arch/arm/mach-at91/board-sam9rlek.c        |  16 +-
>>>>    arch/arm/mach-at91/board.h                 |   3 -
>>>>    arch/arm/mach-at91/include/mach/at91_adc.h | 107 ---------
>>>>    drivers/iio/adc/at91_adc.c                 | 339 +++++++++++++++++++++++----
>>>>    drivers/input/touchscreen/Kconfig          |  12 -
>>>>    drivers/input/touchscreen/Makefile         |   1 -
>>>>    drivers/input/touchscreen/atmel_tsadcc.c   | 358 -----------------------------
>>>>    include/linux/platform_data/at91_adc.h     |  27 +--
>>>>    include/linux/platform_data/atmel.h        |   7 -
>>>>    20 files changed, 380 insertions(+), 689 deletions(-)
>>>>    delete mode 100644 arch/arm/mach-at91/include/mach/at91_adc.h
>>>>    delete mode 100644 drivers/input/touchscreen/atmel_tsadcc.c
>>>>
>>>
>>>
>>> _______________________________________________
>>> linux-arm-kernel mailing list
>>> linux-arm-kernel@lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>
>>
>>
> 
> 


-- 
Nicolas Ferre