[PATCH v3 0/2] Add support for Sensortek STK3310

[PATCH v3 0/2] Add support for Sensortek STK3310

[Tiberiu Breana]

These patches include an iio driver for the Sensortek STK3310
ambient light and proximity sensor. The STK3311 model is also
supported.

Datasheet:
http://www.datasheetspdf.com/datasheet/STK3310.html

Patches are as following:

1. basic functionality:
- raw readings of light and proximity data
- configuration of parameters like gain and integration time
- power management

2. interrupt support:
- interrupt support for proximity events
- enabling/disabling interrupts (events) via sysfs
- setting proximity thresholds

Changes since v2:
- addressed Peter's comments
- changed integration_time_available's type to IIO_CONST_ATTR
- added scale_available attribute for proximity
- removed the stk3310_get_it_vals function
- added the STK3310_REGFIELD macro to reduce source code size

Regards,
Tiberiu

Tiberiu Breana (2):
  iio: light: Add support for Sensortek STK3310
  iio: light: Add threshold interrupt support for STK3310

 drivers/iio/light/Kconfig   |  11 +
 drivers/iio/light/Makefile  |   1 +
 drivers/iio/light/stk3310.c | 722 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 734 insertions(+)
 create mode 100644 drivers/iio/light/stk3310.c

-- 
1.9.1

[PATCH v3 1/2] iio: light: Add support for Sensortek STK3310

[Tiberiu Breana]

Minimal implementation of an IIO driver for the Sensortek
STK3310 ambient light and proximity sensor. The STK3311
model is also supported.

Includes:
- ACPI support;
- read_raw and write_raw;
- reading and setting configuration parameters for gain/scale
  and integration time for both ALS and PS.
- power management

Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
---
 drivers/iio/light/Kconfig   |  11 ++
 drivers/iio/light/Makefile  |   1 +
 drivers/iio/light/stk3310.c | 471 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 483 insertions(+)
 create mode 100644 drivers/iio/light/stk3310.c

diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index a437bad..3d7bafa 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -175,6 +175,17 @@ config LTR501
 	 This driver can also be built as a module.  If so, the module
          will be called ltr501.
 
+config STK3310
+	tristate "STK3310 ALS and proximity sensor"
+	depends on I2C
+	help
+	 Say yes here to get support for the Sensortek STK3310 ambient light
+	 and proximity sensor. The STK3311 model is also supported by this
+	 driver.
+
+	 Choosing M will build the driver as a module. If so, the module
+	 will be called stk3310.
+
 config TCS3414
 	tristate "TAOS TCS3414 digital color sensor"
 	depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index ad7c30f..90e7fd2 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_JSA1212)		+= jsa1212.o
 obj-$(CONFIG_SENSORS_LM3533)	+= lm3533-als.o
 obj-$(CONFIG_LTR501)		+= ltr501.o
 obj-$(CONFIG_SENSORS_TSL2563)	+= tsl2563.o
+obj-$(CONFIG_STK3310)          += stk3310.o
 obj-$(CONFIG_TCS3414)		+= tcs3414.o
 obj-$(CONFIG_TCS3472)		+= tcs3472.o
 obj-$(CONFIG_TSL4531)		+= tsl4531.o
diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
new file mode 100644
index 0000000..0f8c450
--- /dev/null
+++ b/drivers/iio/light/stk3310.c
@@ -0,0 +1,471 @@
+/**
+ * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define STK3310_REG_STATE			0x00
+#define STK3310_REG_PSCTRL			0x01
+#define STK3310_REG_ALSCTRL			0x02
+#define STK3310_REG_PS_DATA_MSB			0x11
+#define STK3310_REG_PS_DATA_LSB			0x12
+#define STK3310_REG_ALS_DATA_MSB		0x13
+#define STK3310_REG_ALS_DATA_LSB		0x14
+#define STK3310_REG_ID				0x3E
+#define STK3310_MAX_REG				0x80
+
+#define STK3310_STATE_EN_PS			0x01
+#define STK3310_STATE_EN_ALS			0x02
+#define STK3310_STATE_STANDBY			0x00
+
+#define STK3310_CHIP_ID_VAL			0x13
+#define STK3311_CHIP_ID_VAL			0x1D
+#define STK3310_PS_MAX_VAL			0xFFFF
+
+#define STK3310_DRIVER_NAME			"stk3310"
+#define STK3310_REGMAP_NAME			"stk3310_regmap"
+
+#define STK3310_SCALE_AVAILABLE			"6.4 1.6 0.4 0.1"
+
+#define STK3310_IT_AVAILABLE \
+	"0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \
+	"0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \
+	"3.031040 6.062080"
+
+#define STK3310_REGFIELD(name)						    \
+	do {								    \
+		data->reg_##name =					    \
+			devm_regmap_field_alloc(&client->dev, regmap,	    \
+				stk3310_reg_field_##name);		    \
+		if (IS_ERR(data->reg_##name)) {				    \
+			dev_err(&client->dev, "reg field alloc failed.\n"); \
+			return PTR_ERR(data->reg_##name);		    \
+		}							    \
+	} while (0)
+
+static const struct reg_field stk3310_reg_field_state =
+				REG_FIELD(STK3310_REG_STATE, 0, 2);
+static const struct reg_field stk3310_reg_field_als_gain =
+				REG_FIELD(STK3310_REG_ALSCTRL, 4, 5);
+static const struct reg_field stk3310_reg_field_ps_gain =
+				REG_FIELD(STK3310_REG_PSCTRL, 4, 5);
+static const struct reg_field stk3310_reg_field_als_it =
+				REG_FIELD(STK3310_REG_ALSCTRL, 0, 3);
+static const struct reg_field stk3310_reg_field_ps_it =
+				REG_FIELD(STK3310_REG_PSCTRL, 0, 3);
+
+/*
+ * Maximum PS values with regard to scale. Used to export the 'inverse'
+ * PS value (high values for far objects, low values for near objects).
+ */
+static const int stk3310_ps_max[4] = {
+	STK3310_PS_MAX_VAL / 64,
+	STK3310_PS_MAX_VAL / 16,
+	STK3310_PS_MAX_VAL /  4,
+	STK3310_PS_MAX_VAL,
+};
+
+static const int stk3310_scale_table[][2] = {
+	{6, 400000}, {1, 600000}, {0, 400000}, {0, 100000}
+};
+
+/* Integration time in seconds, microseconds */
+static const int stk3310_it_table[][2] = {
+	{0, 185},	{0, 370},	{0, 741},	{0, 1480},
+	{0, 2960},	{0, 5920},	{0, 11840},	{0, 23680},
+	{0, 47360},	{0, 94720},	{0, 189440},	{0, 378880},
+	{0, 757760},	{1, 515520},	{3, 31040},	{6, 62080},
+};
+
+struct stk3310_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	bool als_enabled;
+	bool ps_enabled;
+	struct regmap *regmap;
+	struct regmap_field *reg_state;
+	struct regmap_field *reg_als_gain;
+	struct regmap_field *reg_ps_gain;
+	struct regmap_field *reg_als_it;
+	struct regmap_field *reg_ps_it;
+};
+
+static const struct iio_chan_spec stk3310_channels[] = {
+	{
+		.type = IIO_LIGHT,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) |
+			BIT(IIO_CHAN_INFO_SCALE) |
+			BIT(IIO_CHAN_INFO_INT_TIME),
+	},
+	{
+		.type = IIO_PROXIMITY,
+		.info_mask_separate =
+			BIT(IIO_CHAN_INFO_RAW) |
+			BIT(IIO_CHAN_INFO_SCALE) |
+			BIT(IIO_CHAN_INFO_INT_TIME),
+	}
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE);
+
+static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE);
+
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+		      STK3310_IT_AVAILABLE);
+
+static IIO_CONST_ATTR(in_proximity_integration_time_available,
+		      STK3310_IT_AVAILABLE);
+
+static struct attribute *stk3310_attributes[] = {
+	&iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+	&iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+	&iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+	&iio_const_attr_in_proximity_integration_time_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group stk3310_attribute_group = {
+	.attrs = stk3310_attributes
+};
+
+static int stk3310_get_index(const int table[][2], int table_size,
+			     int val, int val2)
+{
+	int i;
+
+	for (i = 0; i < table_size; i++) {
+		if (val == table[i][0] && val2 == table[i][1])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int stk3310_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	u8 reg;
+	u16 buf;
+	int ret;
+	unsigned int index;
+	struct stk3310_data *data = iio_priv(indio_dev);
+	struct i2c_client *client = data->client;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (chan->type == IIO_LIGHT)
+			reg = STK3310_REG_ALS_DATA_MSB;
+		else if (chan->type == IIO_PROXIMITY)
+			reg = STK3310_REG_PS_DATA_MSB;
+		else
+			return -EINVAL;
+		mutex_lock(&data->lock);
+		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+		if (ret < 0) {
+			dev_err(&client->dev, "register read failed\n");
+			mutex_unlock(&data->lock);
+			return ret;
+		}
+		*val = swab16(buf);
+		if (chan->type == IIO_PROXIMITY) {
+			/*
+			 * Invert the proximity data so we return low values
+			 * for close objects and high values for far ones.
+			 */
+			regmap_field_read(data->reg_ps_gain, &index);
+			*val = stk3310_ps_max[index] - *val;
+		}
+		mutex_unlock(&data->lock);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_INT_TIME:
+		if (chan->type == IIO_LIGHT)
+			regmap_field_read(data->reg_als_it, &index);
+		else
+			regmap_field_read(data->reg_ps_it, &index);
+		*val = stk3310_it_table[index][0];
+		*val2 = stk3310_it_table[index][1];
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SCALE:
+		if (chan->type == IIO_LIGHT)
+			regmap_field_read(data->reg_als_gain, &index);
+		else
+			regmap_field_read(data->reg_ps_gain, &index);
+		*val = stk3310_scale_table[index][0];
+		*val2 = stk3310_scale_table[index][1];
+		return IIO_VAL_INT_PLUS_MICRO;
+	}
+
+	return -EINVAL;
+}
+
+static int stk3310_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	int ret;
+	unsigned int index;
+	struct stk3310_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		index = stk3310_get_index(stk3310_it_table,
+					  ARRAY_SIZE(stk3310_it_table),
+					  val, val2);
+		if (index < 0)
+			return -EINVAL;
+		mutex_lock(&data->lock);
+		if (chan->type == IIO_LIGHT)
+			ret = regmap_field_write(data->reg_als_it, index);
+		else
+			ret = regmap_field_write(data->reg_ps_it, index);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+					"sensor configuration failed\n");
+		mutex_unlock(&data->lock);
+		return ret;
+
+	case IIO_CHAN_INFO_SCALE:
+		index = stk3310_get_index(stk3310_scale_table,
+					  ARRAY_SIZE(stk3310_scale_table),
+					  val, val2);
+		if (index < 0)
+			return -EINVAL;
+		mutex_lock(&data->lock);
+		if (chan->type == IIO_LIGHT)
+			ret = regmap_field_write(data->reg_als_gain, index);
+		else
+			ret = regmap_field_write(data->reg_ps_gain, index);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+					"sensor configuration failed\n");
+		mutex_unlock(&data->lock);
+		return ret;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info stk3310_info = {
+	.driver_module		= THIS_MODULE,
+	.read_raw		= stk3310_read_raw,
+	.write_raw		= stk3310_write_raw,
+	.attrs			= &stk3310_attribute_group,
+};
+
+static int stk3310_set_state(struct stk3310_data *data, u8 state)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	/* 3-bit state; 0b100 is not supported. */
+	if (state > 7 || state == 4)
+		return -EINVAL;
+
+	mutex_lock(&data->lock);
+	ret = regmap_field_write(data->reg_state, state);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to change sensor state\n");
+	} else if (state != STK3310_STATE_STANDBY) {
+		/* Don't reset the 'enabled' flags if we're going in standby */
+		data->ps_enabled  = !!(state & 0x01);
+		data->als_enabled = !!(state & 0x02);
+	}
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int stk3310_init(struct iio_dev *indio_dev)
+{
+	int ret;
+	int chipid;
+	u8 state;
+	struct stk3310_data *data = iio_priv(indio_dev);
+	struct i2c_client *client = data->client;
+
+	regmap_read(data->regmap, STK3310_REG_ID, &chipid);
+	if (chipid != STK3310_CHIP_ID_VAL &&
+	    chipid != STK3311_CHIP_ID_VAL) {
+		dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);
+		return -ENODEV;
+	}
+
+	state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS;
+	ret = stk3310_set_state(data, state);
+	if (ret < 0)
+		dev_err(&client->dev, "failed to enable sensor");
+
+	return ret;
+}
+
+static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case STK3310_REG_ALS_DATA_MSB:
+	case STK3310_REG_ALS_DATA_LSB:
+	case STK3310_REG_PS_DATA_LSB:
+	case STK3310_REG_PS_DATA_MSB:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static struct regmap_config stk3310_regmap_config = {
+	.name = STK3310_REGMAP_NAME,
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = STK3310_MAX_REG,
+	.cache_type = REGCACHE_RBTREE,
+	.volatile_reg = stk3310_is_volatile_reg,
+};
+
+static int stk3310_regmap_init(struct stk3310_data *data)
+{
+	struct regmap *regmap;
+	struct i2c_client *client;
+
+	client = data->client;
+	regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "regmap initialization failed.\n");
+		return PTR_ERR(regmap);
+	}
+	data->regmap = regmap;
+
+	STK3310_REGFIELD(state);
+	STK3310_REGFIELD(als_gain);
+	STK3310_REGFIELD(ps_gain);
+	STK3310_REGFIELD(als_it);
+	STK3310_REGFIELD(ps_it);
+
+	return 0;
+}
+
+static int stk3310_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct stk3310_data *data;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+	mutex_init(&data->lock);
+
+	ret = stk3310_regmap_init(data);
+	if (ret < 0)
+		return ret;
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &stk3310_info;
+	indio_dev->name = STK3310_DRIVER_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = stk3310_channels;
+	indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);
+
+	ret = stk3310_init(indio_dev);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		stk3310_set_state(data, STK3310_STATE_STANDBY);
+	}
+
+	return ret;
+}
+
+static int stk3310_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+	return stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stk3310_suspend(struct device *dev)
+{
+	struct stk3310_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk3310_set_state(data, STK3310_STATE_STANDBY);
+}
+
+static int stk3310_resume(struct device *dev)
+{
+	int state = 0;
+	struct stk3310_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+	if (data->ps_enabled)
+		state |= STK3310_STATE_EN_PS;
+	if (data->als_enabled)
+		state |= STK3310_STATE_EN_ALS;
+
+	return stk3310_set_state(data, state);
+}
+
+static SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, stk3310_resume);
+
+#define STK3310_PM_OPS (&stk3310_pm_ops)
+#else
+#define STK3310_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id stk3310_i2c_id[] = {
+	{"STK3310", 0},
+	{"STK3311", 0},
+	{}
+};
+
+static const struct acpi_device_id stk3310_acpi_id[] = {
+	{"STK3310", 0},
+	{"STK3311", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id);
+
+static struct i2c_driver stk3310_driver = {
+	.driver = {
+		.name = "stk3310",
+		.pm = STK3310_PM_OPS,
+		.acpi_match_table = ACPI_PTR(stk3310_acpi_id),
+	},
+	.probe =            stk3310_probe,
+	.remove =           stk3310_remove,
+	.id_table =         stk3310_i2c_id,
+};
+
+module_i2c_driver(stk3310_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver");
+MODULE_LICENSE("GPL v2");
-- 
1.9.1

Re: [PATCH v3 1/2] iio: light: Add support for Sensortek STK3310

[Jonathan Cameron]

On 27/04/15 16:34, Tiberiu Breana wrote:
> Minimal implementation of an IIO driver for the Sensortek
> STK3310 ambient light and proximity sensor. The STK3311
> model is also supported.
> 
> Includes:
> - ACPI support;
> - read_raw and write_raw;
> - reading and setting configuration parameters for gain/scale
>   and integration time for both ALS and PS.
> - power management
> 
> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
A couple of trivial comments inline.  None are major enough
to warant another spin of the patch though, so applied to the
togreg branch of iio.git  This will get pushed out as testing
sometime soonish (travelling).

Thanks,

Jonathan
> ---
>  drivers/iio/light/Kconfig   |  11 ++
>  drivers/iio/light/Makefile  |   1 +
>  drivers/iio/light/stk3310.c | 471 ++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 483 insertions(+)
>  create mode 100644 drivers/iio/light/stk3310.c
> 
> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
> index a437bad..3d7bafa 100644
> --- a/drivers/iio/light/Kconfig
> +++ b/drivers/iio/light/Kconfig
> @@ -175,6 +175,17 @@ config LTR501
>  	 This driver can also be built as a module.  If so, the module
>           will be called ltr501.
>  
> +config STK3310
> +	tristate "STK3310 ALS and proximity sensor"
> +	depends on I2C
> +	help
> +	 Say yes here to get support for the Sensortek STK3310 ambient light
> +	 and proximity sensor. The STK3311 model is also supported by this
> +	 driver.
> +
> +	 Choosing M will build the driver as a module. If so, the module
> +	 will be called stk3310.
> +
>  config TCS3414
>  	tristate "TAOS TCS3414 digital color sensor"
>  	depends on I2C
> diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
> index ad7c30f..90e7fd2 100644
> --- a/drivers/iio/light/Makefile
> +++ b/drivers/iio/light/Makefile
> @@ -18,6 +18,7 @@ obj-$(CONFIG_JSA1212)		+= jsa1212.o
>  obj-$(CONFIG_SENSORS_LM3533)	+= lm3533-als.o
>  obj-$(CONFIG_LTR501)		+= ltr501.o
>  obj-$(CONFIG_SENSORS_TSL2563)	+= tsl2563.o
> +obj-$(CONFIG_STK3310)          += stk3310.o
>  obj-$(CONFIG_TCS3414)		+= tcs3414.o
>  obj-$(CONFIG_TCS3472)		+= tcs3472.o
>  obj-$(CONFIG_TSL4531)		+= tsl4531.o
> diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
> new file mode 100644
> index 0000000..0f8c450
> --- /dev/null
> +++ b/drivers/iio/light/stk3310.c
> @@ -0,0 +1,471 @@
> +/**
> + * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor
> + *
> + * Copyright (c) 2015, Intel Corporation.
> + *
> + * This file is subject to the terms and conditions of version 2 of
> + * the GNU General Public License. See the file COPYING in the main
> + * directory of this archive for more details.
> + *
> + * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48.
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/i2c.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/regmap.h>
> +#include <linux/iio/iio.h>
> +#include <linux/iio/sysfs.h>
> +
> +#define STK3310_REG_STATE			0x00
> +#define STK3310_REG_PSCTRL			0x01
> +#define STK3310_REG_ALSCTRL			0x02
> +#define STK3310_REG_PS_DATA_MSB			0x11
> +#define STK3310_REG_PS_DATA_LSB			0x12
> +#define STK3310_REG_ALS_DATA_MSB		0x13
> +#define STK3310_REG_ALS_DATA_LSB		0x14
> +#define STK3310_REG_ID				0x3E
> +#define STK3310_MAX_REG				0x80
> +
> +#define STK3310_STATE_EN_PS			0x01
> +#define STK3310_STATE_EN_ALS			0x02
> +#define STK3310_STATE_STANDBY			0x00
> +
> +#define STK3310_CHIP_ID_VAL			0x13
> +#define STK3311_CHIP_ID_VAL			0x1D
> +#define STK3310_PS_MAX_VAL			0xFFFF
> +
> +#define STK3310_DRIVER_NAME			"stk3310"
> +#define STK3310_REGMAP_NAME			"stk3310_regmap"
> +
> +#define STK3310_SCALE_AVAILABLE			"6.4 1.6 0.4 0.1"
> +
> +#define STK3310_IT_AVAILABLE \
> +	"0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \
> +	"0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \
> +	"3.031040 6.062080"
> +
> +#define STK3310_REGFIELD(name)						    \
> +	do {								    \
> +		data->reg_##name =					    \
> +			devm_regmap_field_alloc(&client->dev, regmap,	    \
> +				stk3310_reg_field_##name);		    \
> +		if (IS_ERR(data->reg_##name)) {				    \
> +			dev_err(&client->dev, "reg field alloc failed.\n"); \
> +			return PTR_ERR(data->reg_##name);		    \
> +		}							    \
> +	} while (0)
> +
> +static const struct reg_field stk3310_reg_field_state =
> +				REG_FIELD(STK3310_REG_STATE, 0, 2);
> +static const struct reg_field stk3310_reg_field_als_gain =
> +				REG_FIELD(STK3310_REG_ALSCTRL, 4, 5);
> +static const struct reg_field stk3310_reg_field_ps_gain =
> +				REG_FIELD(STK3310_REG_PSCTRL, 4, 5);
> +static const struct reg_field stk3310_reg_field_als_it =
> +				REG_FIELD(STK3310_REG_ALSCTRL, 0, 3);
> +static const struct reg_field stk3310_reg_field_ps_it =
> +				REG_FIELD(STK3310_REG_PSCTRL, 0, 3);
> +
> +/*
> + * Maximum PS values with regard to scale. Used to export the 'inverse'
> + * PS value (high values for far objects, low values for near objects).
> + */
> +static const int stk3310_ps_max[4] = {
> +	STK3310_PS_MAX_VAL / 64,
> +	STK3310_PS_MAX_VAL / 16,
> +	STK3310_PS_MAX_VAL /  4,
> +	STK3310_PS_MAX_VAL,
> +};
> +
> +static const int stk3310_scale_table[][2] = {
> +	{6, 400000}, {1, 600000}, {0, 400000}, {0, 100000}
> +};
> +
> +/* Integration time in seconds, microseconds */
> +static const int stk3310_it_table[][2] = {
> +	{0, 185},	{0, 370},	{0, 741},	{0, 1480},
> +	{0, 2960},	{0, 5920},	{0, 11840},	{0, 23680},
> +	{0, 47360},	{0, 94720},	{0, 189440},	{0, 378880},
> +	{0, 757760},	{1, 515520},	{3, 31040},	{6, 62080},
> +};
> +
> +struct stk3310_data {
> +	struct i2c_client *client;
> +	struct mutex lock;
> +	bool als_enabled;
> +	bool ps_enabled;
> +	struct regmap *regmap;
> +	struct regmap_field *reg_state;
> +	struct regmap_field *reg_als_gain;
> +	struct regmap_field *reg_ps_gain;
> +	struct regmap_field *reg_als_it;
> +	struct regmap_field *reg_ps_it;
> +};
> +
> +static const struct iio_chan_spec stk3310_channels[] = {
> +	{
> +		.type = IIO_LIGHT,
> +		.info_mask_separate =
> +			BIT(IIO_CHAN_INFO_RAW) |
> +			BIT(IIO_CHAN_INFO_SCALE) |
> +			BIT(IIO_CHAN_INFO_INT_TIME),
> +	},
> +	{
> +		.type = IIO_PROXIMITY,
> +		.info_mask_separate =
> +			BIT(IIO_CHAN_INFO_RAW) |
> +			BIT(IIO_CHAN_INFO_SCALE) |
> +			BIT(IIO_CHAN_INFO_INT_TIME),
> +	}
> +};
> +
> +static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE);
> +
> +static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE);
> +
> +static IIO_CONST_ATTR(in_illuminance_integration_time_available,
> +		      STK3310_IT_AVAILABLE);
> +
> +static IIO_CONST_ATTR(in_proximity_integration_time_available,
> +		      STK3310_IT_AVAILABLE);
> +
> +static struct attribute *stk3310_attributes[] = {
> +	&iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
> +	&iio_const_attr_in_proximity_scale_available.dev_attr.attr,
> +	&iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
> +	&iio_const_attr_in_proximity_integration_time_available.dev_attr.attr,
> +	NULL,
> +};
> +
> +static const struct attribute_group stk3310_attribute_group = {
> +	.attrs = stk3310_attributes
> +};
> +
> +static int stk3310_get_index(const int table[][2], int table_size,
> +			     int val, int val2)
> +{
> +	int i;
> +
> +	for (i = 0; i < table_size; i++) {
> +		if (val == table[i][0] && val2 == table[i][1])
> +			return i;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int stk3310_read_raw(struct iio_dev *indio_dev,
> +			    struct iio_chan_spec const *chan,
> +			    int *val, int *val2, long mask)
> +{
> +	u8 reg;
> +	u16 buf;
> +	int ret;
> +	unsigned int index;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +	struct i2c_client *client = data->client;
> +
> +	switch (mask) {
> +	case IIO_CHAN_INFO_RAW:
> +		if (chan->type == IIO_LIGHT)
> +			reg = STK3310_REG_ALS_DATA_MSB;
> +		else if (chan->type == IIO_PROXIMITY)
> +			reg = STK3310_REG_PS_DATA_MSB;
> +		else
> +			return -EINVAL;
> +		mutex_lock(&data->lock);
> +		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
> +		if (ret < 0) {
> +			dev_err(&client->dev, "register read failed\n");
> +			mutex_unlock(&data->lock);
> +			return ret;
> +		}
> +		*val = swab16(buf);
> +		if (chan->type == IIO_PROXIMITY) {
> +			/*
> +			 * Invert the proximity data so we return low values
> +			 * for close objects and high values for far ones.
> +			 */
> +			regmap_field_read(data->reg_ps_gain, &index);
> +			*val = stk3310_ps_max[index] - *val;
> +		}
> +		mutex_unlock(&data->lock);
> +		return IIO_VAL_INT;
> +	case IIO_CHAN_INFO_INT_TIME:
> +		if (chan->type == IIO_LIGHT)
> +			regmap_field_read(data->reg_als_it, &index);
> +		else
> +			regmap_field_read(data->reg_ps_it, &index);
> +		*val = stk3310_it_table[index][0];
> +		*val2 = stk3310_it_table[index][1];
> +		return IIO_VAL_INT_PLUS_MICRO;
> +	case IIO_CHAN_INFO_SCALE:
> +		if (chan->type == IIO_LIGHT)
> +			regmap_field_read(data->reg_als_gain, &index);
> +		else
> +			regmap_field_read(data->reg_ps_gain, &index);
> +		*val = stk3310_scale_table[index][0];
> +		*val2 = stk3310_scale_table[index][1];
> +		return IIO_VAL_INT_PLUS_MICRO;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int stk3310_write_raw(struct iio_dev *indio_dev,
> +			     struct iio_chan_spec const *chan,
> +			     int val, int val2, long mask)
> +{
> +	int ret;
> +	unsigned int index;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +
> +	switch (mask) {
> +	case IIO_CHAN_INFO_INT_TIME:
> +		index = stk3310_get_index(stk3310_it_table,
> +					  ARRAY_SIZE(stk3310_it_table),
> +					  val, val2);
> +		if (index < 0)
> +			return -EINVAL;
> +		mutex_lock(&data->lock);
> +		if (chan->type == IIO_LIGHT)
> +			ret = regmap_field_write(data->reg_als_it, index);
> +		else
> +			ret = regmap_field_write(data->reg_ps_it, index);
> +		if (ret < 0)
> +			dev_err(&data->client->dev,
> +					"sensor configuration failed\n");
> +		mutex_unlock(&data->lock);
> +		return ret;
> +
> +	case IIO_CHAN_INFO_SCALE:
> +		index = stk3310_get_index(stk3310_scale_table,
> +					  ARRAY_SIZE(stk3310_scale_table),
> +					  val, val2);
> +		if (index < 0)
> +			return -EINVAL;
> +		mutex_lock(&data->lock);
> +		if (chan->type == IIO_LIGHT)
> +			ret = regmap_field_write(data->reg_als_gain, index);
> +		else
> +			ret = regmap_field_write(data->reg_ps_gain, index);
> +		if (ret < 0)
> +			dev_err(&data->client->dev,
> +					"sensor configuration failed\n");
> +		mutex_unlock(&data->lock);
> +		return ret;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static const struct iio_info stk3310_info = {
> +	.driver_module		= THIS_MODULE,
> +	.read_raw		= stk3310_read_raw,
> +	.write_raw		= stk3310_write_raw,
> +	.attrs			= &stk3310_attribute_group,
> +};
> +
> +static int stk3310_set_state(struct stk3310_data *data, u8 state)
> +{
> +	int ret;
> +	struct i2c_client *client = data->client;
> +
> +	/* 3-bit state; 0b100 is not supported. */
> +	if (state > 7 || state == 4)
> +		return -EINVAL;
> +
> +	mutex_lock(&data->lock);
> +	ret = regmap_field_write(data->reg_state, state);
> +	if (ret < 0) {
> +		dev_err(&client->dev, "failed to change sensor state\n");
> +	} else if (state != STK3310_STATE_STANDBY) {
> +		/* Don't reset the 'enabled' flags if we're going in standby */
For clarity I'd have been tempted to waste a bit of space and have
ps_enabled_prestandy or something like that so as to have kept a single
meaning for these variables, whatever the state.
> +		data->ps_enabled  = !!(state & 0x01);
> +		data->als_enabled = !!(state & 0x02);
> +	}
> +	mutex_unlock(&data->lock);
> +
> +	return ret;
> +}
> +
> +static int stk3310_init(struct iio_dev *indio_dev)
> +{
> +	int ret;
> +	int chipid;
> +	u8 state;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +	struct i2c_client *client = data->client;
> +
> +	regmap_read(data->regmap, STK3310_REG_ID, &chipid);
> +	if (chipid != STK3310_CHIP_ID_VAL &&
> +	    chipid != STK3311_CHIP_ID_VAL) {
> +		dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);
> +		return -ENODEV;
> +	}
> +
> +	state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS;
> +	ret = stk3310_set_state(data, state);
> +	if (ret < 0)
> +		dev_err(&client->dev, "failed to enable sensor");
> +
> +	return ret;
> +}
> +
> +static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
> +{
> +	switch (reg) {
> +	case STK3310_REG_ALS_DATA_MSB:
> +	case STK3310_REG_ALS_DATA_LSB:
> +	case STK3310_REG_PS_DATA_LSB:
> +	case STK3310_REG_PS_DATA_MSB:
> +		return true;
> +	default:
> +		return false;
> +	}
> +}
> +
> +static struct regmap_config stk3310_regmap_config = {
> +	.name = STK3310_REGMAP_NAME,
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = STK3310_MAX_REG,
> +	.cache_type = REGCACHE_RBTREE,
> +	.volatile_reg = stk3310_is_volatile_reg,
> +};
> +
> +static int stk3310_regmap_init(struct stk3310_data *data)
> +{
> +	struct regmap *regmap;
> +	struct i2c_client *client;
> +
> +	client = data->client;
> +	regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config);
> +	if (IS_ERR(regmap)) {
> +		dev_err(&client->dev, "regmap initialization failed.\n");
> +		return PTR_ERR(regmap);
> +	}
> +	data->regmap = regmap;
> +
> +	STK3310_REGFIELD(state);
This is nice and neat and tidy - rather feels like regmap would benefit
from an array of fields allocator but this is a good alternative.
> +	STK3310_REGFIELD(als_gain);
> +	STK3310_REGFIELD(ps_gain);
> +	STK3310_REGFIELD(als_it);
> +	STK3310_REGFIELD(ps_it);
> +
> +	return 0;
> +}
> +
> +static int stk3310_probe(struct i2c_client *client,
> +			 const struct i2c_device_id *id)
> +{
> +	int ret;
> +	struct iio_dev *indio_dev;
> +	struct stk3310_data *data;
> +
> +	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
> +	if (!indio_dev) {
> +		dev_err(&client->dev, "iio allocation failed!\n");
> +		return -ENOMEM;
> +	}
> +
> +	data = iio_priv(indio_dev);
> +	data->client = client;
> +	i2c_set_clientdata(client, indio_dev);
> +	mutex_init(&data->lock);
> +
> +	ret = stk3310_regmap_init(data);
> +	if (ret < 0)
> +		return ret;
> +
> +	indio_dev->dev.parent = &client->dev;
> +	indio_dev->info = &stk3310_info;
> +	indio_dev->name = STK3310_DRIVER_NAME;
> +	indio_dev->modes = INDIO_DIRECT_MODE;
> +	indio_dev->channels = stk3310_channels;
> +	indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);
> +
> +	ret = stk3310_init(indio_dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = iio_device_register(indio_dev);
> +	if (ret < 0) {
> +		dev_err(&client->dev, "device_register failed\n");
> +		stk3310_set_state(data, STK3310_STATE_STANDBY);
> +	}
> +
> +	return ret;
> +}
> +
> +static int stk3310_remove(struct i2c_client *client)
> +{
> +	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> +
> +	iio_device_unregister(indio_dev);
> +	return stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY);
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int stk3310_suspend(struct device *dev)
> +{
> +	struct stk3310_data *data;
> +
> +	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
> +
> +	return stk3310_set_state(data, STK3310_STATE_STANDBY);
> +}
> +
> +static int stk3310_resume(struct device *dev)
> +{
> +	int state = 0;
> +	struct stk3310_data *data;
> +
> +	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
> +	if (data->ps_enabled)
> +		state |= STK3310_STATE_EN_PS;
> +	if (data->als_enabled)
> +		state |= STK3310_STATE_EN_ALS;
> +
> +	return stk3310_set_state(data, state);
> +}
> +
> +static SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, stk3310_resume);
> +
> +#define STK3310_PM_OPS (&stk3310_pm_ops)
> +#else
> +#define STK3310_PM_OPS NULL
> +#endif
> +
> +static const struct i2c_device_id stk3310_i2c_id[] = {
> +	{"STK3310", 0},
> +	{"STK3311", 0},
> +	{}
> +};
> +
> +static const struct acpi_device_id stk3310_acpi_id[] = {
> +	{"STK3310", 0},
> +	{"STK3311", 0},
> +	{}
> +};
> +
> +MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id);
> +
> +static struct i2c_driver stk3310_driver = {
> +	.driver = {
> +		.name = "stk3310",
> +		.pm = STK3310_PM_OPS,
> +		.acpi_match_table = ACPI_PTR(stk3310_acpi_id),
> +	},
> +	.probe =            stk3310_probe,
> +	.remove =           stk3310_remove,
> +	.id_table =         stk3310_i2c_id,
> +};
> +
> +module_i2c_driver(stk3310_driver);
> +
> +MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
> +MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver");
> +MODULE_LICENSE("GPL v2");
> 

[PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Tiberiu Breana]

Added interrupt support for proximity threshold events
to the stk3310 driver.

Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
---
 drivers/iio/light/stk3310.c | 255 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 253 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index 0f8c450..e79b9d8 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -12,15 +12,22 @@
 
 #include <linux/acpi.h>
 #include <linux/i2c.h>
+#include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/events.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 
 #define STK3310_REG_STATE			0x00
 #define STK3310_REG_PSCTRL			0x01
 #define STK3310_REG_ALSCTRL			0x02
+#define STK3310_REG_INT				0x04
+#define STK3310_REG_THDH_PS			0x06
+#define STK3310_REG_THDL_PS			0x08
+#define STK3310_REG_FLAG			0x10
 #define STK3310_REG_PS_DATA_MSB			0x11
 #define STK3310_REG_PS_DATA_LSB			0x12
 #define STK3310_REG_ALS_DATA_MSB		0x13
@@ -34,10 +41,14 @@
 
 #define STK3310_CHIP_ID_VAL			0x13
 #define STK3311_CHIP_ID_VAL			0x1D
+#define STK3310_PSINT_EN			0x01
 #define STK3310_PS_MAX_VAL			0xFFFF
+#define STK3310_THRESH_MAX			0xFFFF
 
 #define STK3310_DRIVER_NAME			"stk3310"
 #define STK3310_REGMAP_NAME			"stk3310_regmap"
+#define STK3310_EVENT				"stk3310_event"
+#define STK3310_GPIO				"stk3310_gpio"
 
 #define STK3310_SCALE_AVAILABLE			"6.4 1.6 0.4 0.1"
 
@@ -67,7 +78,12 @@ static const struct reg_field stk3310_reg_field_als_it =
 				REG_FIELD(STK3310_REG_ALSCTRL, 0, 3);
 static const struct reg_field stk3310_reg_field_ps_it =
 				REG_FIELD(STK3310_REG_PSCTRL, 0, 3);
-
+static const struct reg_field stk3310_reg_field_int_ps =
+				REG_FIELD(STK3310_REG_INT, 0, 2);
+static const struct reg_field stk3310_reg_field_flag_psint =
+				REG_FIELD(STK3310_REG_FLAG, 4, 4);
+static const struct reg_field stk3310_reg_field_flag_nf =
+				REG_FIELD(STK3310_REG_FLAG, 0, 0);
 /*
  * Maximum PS values with regard to scale. Used to export the 'inverse'
  * PS value (high values for far objects, low values for near objects).
@@ -96,12 +112,33 @@ struct stk3310_data {
 	struct mutex lock;
 	bool als_enabled;
 	bool ps_enabled;
+	u64 timestamp;
 	struct regmap *regmap;
 	struct regmap_field *reg_state;
 	struct regmap_field *reg_als_gain;
 	struct regmap_field *reg_ps_gain;
 	struct regmap_field *reg_als_it;
 	struct regmap_field *reg_ps_it;
+	struct regmap_field *reg_int_ps;
+	struct regmap_field *reg_flag_psint;
+	struct regmap_field *reg_flag_nf;
+};
+
+static const struct iio_event_spec stk3310_events[] = {
+	/* Proximity event */
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+				 BIT(IIO_EV_INFO_ENABLE),
+	},
+	/* Out-of-proximity event */
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+				 BIT(IIO_EV_INFO_ENABLE),
+	},
 };
 
 static const struct iio_chan_spec stk3310_channels[] = {
@@ -118,6 +155,8 @@ static const struct iio_chan_spec stk3310_channels[] = {
 			BIT(IIO_CHAN_INFO_RAW) |
 			BIT(IIO_CHAN_INFO_SCALE) |
 			BIT(IIO_CHAN_INFO_INT_TIME),
+		.event_spec = stk3310_events,
+		.num_event_specs = ARRAY_SIZE(stk3310_events),
 	}
 };
 
@@ -156,6 +195,118 @@ static int stk3310_get_index(const int table[][2], int table_size,
 	return -EINVAL;
 }
 
+static int stk3310_read_event(struct iio_dev *indio_dev,
+			      const struct iio_chan_spec *chan,
+			      enum iio_event_type type,
+			      enum iio_event_direction dir,
+			      enum iio_event_info info,
+			      int *val, int *val2)
+{
+	u8 reg;
+	u16 buf;
+	int ret;
+	unsigned int index;
+	struct stk3310_data *data = iio_priv(indio_dev);
+
+	if (info != IIO_EV_INFO_VALUE)
+		return -EINVAL;
+
+	/*
+	 * Only proximity interrupts are implemented at the moment.
+	 * Since we're inverting proximity values, the sensor's 'high'
+	 * threshold will become our 'low' threshold, associated with
+	 * 'near' events. Similarly, the sensor's 'low' threshold will
+	 * be our 'high' threshold, associated with 'far' events.
+	 */
+	if (dir == IIO_EV_DIR_RISING)
+		reg = STK3310_REG_THDL_PS;
+	else if (dir == IIO_EV_DIR_FALLING)
+		reg = STK3310_REG_THDH_PS;
+	else
+		return -EINVAL;
+
+	mutex_lock(&data->lock);
+	ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+	mutex_unlock(&data->lock);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "register read failed\n");
+		return ret;
+	}
+	regmap_field_read(data->reg_ps_gain, &index);
+	*val = swab16(stk3310_ps_max[index] - buf);
+
+	return IIO_VAL_INT;
+}
+
+static int stk3310_write_event(struct iio_dev *indio_dev,
+			       const struct iio_chan_spec *chan,
+			       enum iio_event_type type,
+			       enum iio_event_direction dir,
+			       enum iio_event_info info,
+			       int val, int val2)
+{
+	u8 reg;
+	u16 buf;
+	int ret;
+	unsigned int index;
+	struct stk3310_data *data = iio_priv(indio_dev);
+	struct i2c_client *client = data->client;
+
+	regmap_field_read(data->reg_ps_gain, &index);
+	if (val > stk3310_ps_max[index])
+		return -EINVAL;
+
+	if (dir == IIO_EV_DIR_RISING)
+		reg = STK3310_REG_THDL_PS;
+	else if (dir == IIO_EV_DIR_FALLING)
+		reg = STK3310_REG_THDH_PS;
+	else
+		return -EINVAL;
+
+	buf = swab16(stk3310_ps_max[index] - val);
+	ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
+	if (ret < 0)
+		dev_err(&client->dev, "failed to set PS threshold!\n");
+
+	return ret;
+}
+
+static int stk3310_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	unsigned int event_val;
+	struct stk3310_data *data = iio_priv(indio_dev);
+
+	regmap_field_read(data->reg_int_ps, &event_val);
+
+	return event_val;
+}
+
+static int stk3310_write_event_config(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir,
+				      int state)
+{
+	int ret;
+	struct stk3310_data *data = iio_priv(indio_dev);
+	struct i2c_client *client = data->client;
+
+	if (state < 0 || state > 7)
+		return -EINVAL;
+
+	/* Set INT_PS value */
+	mutex_lock(&data->lock);
+	ret = regmap_field_write(data->reg_int_ps, state);
+	if (ret < 0)
+		dev_err(&client->dev, "failed to set interrupt mode\n");
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
 static int stk3310_read_raw(struct iio_dev *indio_dev,
 			    struct iio_chan_spec const *chan,
 			    int *val, int *val2, long mask)
@@ -266,6 +417,10 @@ static const struct iio_info stk3310_info = {
 	.read_raw		= stk3310_read_raw,
 	.write_raw		= stk3310_write_raw,
 	.attrs			= &stk3310_attribute_group,
+	.read_event_value	= stk3310_read_event,
+	.write_event_value	= stk3310_write_event,
+	.read_event_config	= stk3310_read_event_config,
+	.write_event_config	= stk3310_write_event_config,
 };
 
 static int stk3310_set_state(struct stk3310_data *data, u8 state)
@@ -308,8 +463,43 @@ static int stk3310_init(struct iio_dev *indio_dev)
 
 	state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS;
 	ret = stk3310_set_state(data, state);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(&client->dev, "failed to enable sensor");
+		return ret;
+	}
+
+	/* Enable PS interrupts */
+	ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN);
+	if (ret < 0)
+		dev_err(&client->dev, "failed to enable interrupts!\n");
+
+	return ret;
+}
+
+static int stk3310_gpio_probe(struct i2c_client *client)
+{
+	struct device *dev;
+	struct gpio_desc *gpio;
+	int ret;
+
+	if (!client)
+		return -EINVAL;
+
+	dev = &client->dev;
+
+	/* gpio interrupt pin */
+	gpio = devm_gpiod_get_index(dev, STK3310_GPIO, 0);
+	if (IS_ERR(gpio)) {
+		dev_err(dev, "acpi gpio get index failed\n");
+		return PTR_ERR(gpio);
+	}
+
+	ret = gpiod_direction_input(gpio);
+	if (ret)
+		return ret;
+
+	ret = gpiod_to_irq(gpio);
+	dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
 
 	return ret;
 }
@@ -321,6 +511,7 @@ static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
 	case STK3310_REG_ALS_DATA_LSB:
 	case STK3310_REG_PS_DATA_LSB:
 	case STK3310_REG_PS_DATA_MSB:
+	case STK3310_REG_FLAG:
 		return true;
 	default:
 		return false;
@@ -354,10 +545,55 @@ static int stk3310_regmap_init(struct stk3310_data *data)
 	STK3310_REGFIELD(ps_gain);
 	STK3310_REGFIELD(als_it);
 	STK3310_REGFIELD(ps_it);
+	STK3310_REGFIELD(int_ps);
+	STK3310_REGFIELD(flag_psint);
+	STK3310_REGFIELD(flag_nf);
 
 	return 0;
 }
 
+static irqreturn_t stk3310_irq_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct stk3310_data *data = iio_priv(indio_dev);
+
+	data->timestamp = iio_get_time_ns();
+
+	return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t stk3310_irq_event_handler(int irq, void *private)
+{
+	int ret;
+	unsigned int dir;
+	u64 event;
+
+	struct iio_dev *indio_dev = private;
+	struct stk3310_data *data = iio_priv(indio_dev);
+
+	/* Read FLAG_NF to figure out what threshold has been met. */
+	mutex_lock(&data->lock);
+	ret = regmap_field_read(data->reg_flag_nf, &dir);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "register read failed\n");
+		mutex_unlock(&data->lock);
+		return ret;
+	}
+	event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1,
+				     IIO_EV_TYPE_THRESH,
+				     (dir ? IIO_EV_DIR_RISING :
+					    IIO_EV_DIR_FALLING));
+	iio_push_event(indio_dev, event, data->timestamp);
+
+	/* Reset the interrupt flag */
+	ret = regmap_field_write(data->reg_flag_psint, 0);
+	if (ret < 0)
+		dev_err(&data->client->dev, "failed to reset interrupts\n");
+	mutex_unlock(&data->lock);
+
+	return IRQ_HANDLED;
+}
+
 static int stk3310_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
@@ -397,6 +633,21 @@ static int stk3310_probe(struct i2c_client *client,
 		stk3310_set_state(data, STK3310_STATE_STANDBY);
 	}
 
+	if (client->irq <= 0)
+		client->irq = stk3310_gpio_probe(client);
+
+	if (client->irq >= 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						stk3310_irq_handler,
+						stk3310_irq_event_handler,
+						IRQF_TRIGGER_FALLING |
+						IRQF_ONESHOT,
+						STK3310_EVENT, indio_dev);
+		if (ret < 0)
+			dev_err(&client->dev, "request irq %d failed\n",
+					client->irq);
+	}
+
 	return ret;
 }
 
-- 
1.9.1

Re: [PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Jonathan Cameron]

On 27/04/15 16:34, Tiberiu Breana wrote:
> Added interrupt support for proximity threshold events
> to the stk3310 driver.
I've not objection to the split, but also wouldn't have minded having
this in the original driver split (just in case you are doing it to make
reviewing easier - in this sort of thing it makes little difference!)
> 
> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
Again, nice patch.  My only comment below is about the fact I should
find out what happened to the thoughts about moving the gpio/interrupt
setup code into ACPI to avoid having the same 10 lines in every driver.

Anyhow, applied to the togreg branch of iio.git, pushed out as testing
when you least expect it ;)

Thanks,

Jonathan
> ---
>  drivers/iio/light/stk3310.c | 255 +++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 253 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
> index 0f8c450..e79b9d8 100644
> --- a/drivers/iio/light/stk3310.c
> +++ b/drivers/iio/light/stk3310.c
> @@ -12,15 +12,22 @@
>  
>  #include <linux/acpi.h>
>  #include <linux/i2c.h>
> +#include <linux/interrupt.h>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
>  #include <linux/regmap.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/iio/events.h>
>  #include <linux/iio/iio.h>
>  #include <linux/iio/sysfs.h>
>  
>  #define STK3310_REG_STATE			0x00
>  #define STK3310_REG_PSCTRL			0x01
>  #define STK3310_REG_ALSCTRL			0x02
> +#define STK3310_REG_INT				0x04
> +#define STK3310_REG_THDH_PS			0x06
> +#define STK3310_REG_THDL_PS			0x08
> +#define STK3310_REG_FLAG			0x10
>  #define STK3310_REG_PS_DATA_MSB			0x11
>  #define STK3310_REG_PS_DATA_LSB			0x12
>  #define STK3310_REG_ALS_DATA_MSB		0x13
> @@ -34,10 +41,14 @@
>  
>  #define STK3310_CHIP_ID_VAL			0x13
>  #define STK3311_CHIP_ID_VAL			0x1D
> +#define STK3310_PSINT_EN			0x01
>  #define STK3310_PS_MAX_VAL			0xFFFF
> +#define STK3310_THRESH_MAX			0xFFFF
>  
>  #define STK3310_DRIVER_NAME			"stk3310"
>  #define STK3310_REGMAP_NAME			"stk3310_regmap"
> +#define STK3310_EVENT				"stk3310_event"
> +#define STK3310_GPIO				"stk3310_gpio"
>  
>  #define STK3310_SCALE_AVAILABLE			"6.4 1.6 0.4 0.1"
>  
> @@ -67,7 +78,12 @@ static const struct reg_field stk3310_reg_field_als_it =
>  				REG_FIELD(STK3310_REG_ALSCTRL, 0, 3);
>  static const struct reg_field stk3310_reg_field_ps_it =
>  				REG_FIELD(STK3310_REG_PSCTRL, 0, 3);
> -
> +static const struct reg_field stk3310_reg_field_int_ps =
> +				REG_FIELD(STK3310_REG_INT, 0, 2);
> +static const struct reg_field stk3310_reg_field_flag_psint =
> +				REG_FIELD(STK3310_REG_FLAG, 4, 4);
> +static const struct reg_field stk3310_reg_field_flag_nf =
> +				REG_FIELD(STK3310_REG_FLAG, 0, 0);
>  /*
>   * Maximum PS values with regard to scale. Used to export the 'inverse'
>   * PS value (high values for far objects, low values for near objects).
> @@ -96,12 +112,33 @@ struct stk3310_data {
>  	struct mutex lock;
>  	bool als_enabled;
>  	bool ps_enabled;
> +	u64 timestamp;
>  	struct regmap *regmap;
>  	struct regmap_field *reg_state;
>  	struct regmap_field *reg_als_gain;
>  	struct regmap_field *reg_ps_gain;
>  	struct regmap_field *reg_als_it;
>  	struct regmap_field *reg_ps_it;
> +	struct regmap_field *reg_int_ps;
> +	struct regmap_field *reg_flag_psint;
> +	struct regmap_field *reg_flag_nf;
> +};
> +
> +static const struct iio_event_spec stk3310_events[] = {
> +	/* Proximity event */
> +	{
> +		.type = IIO_EV_TYPE_THRESH,
> +		.dir = IIO_EV_DIR_FALLING,
> +		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
> +				 BIT(IIO_EV_INFO_ENABLE),
> +	},
> +	/* Out-of-proximity event */
> +	{
> +		.type = IIO_EV_TYPE_THRESH,
> +		.dir = IIO_EV_DIR_RISING,
> +		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
> +				 BIT(IIO_EV_INFO_ENABLE),
> +	},
>  };
>  
>  static const struct iio_chan_spec stk3310_channels[] = {
> @@ -118,6 +155,8 @@ static const struct iio_chan_spec stk3310_channels[] = {
>  			BIT(IIO_CHAN_INFO_RAW) |
>  			BIT(IIO_CHAN_INFO_SCALE) |
>  			BIT(IIO_CHAN_INFO_INT_TIME),
> +		.event_spec = stk3310_events,
> +		.num_event_specs = ARRAY_SIZE(stk3310_events),
>  	}
>  };
>  
> @@ -156,6 +195,118 @@ static int stk3310_get_index(const int table[][2], int table_size,
>  	return -EINVAL;
>  }
>  
> +static int stk3310_read_event(struct iio_dev *indio_dev,
> +			      const struct iio_chan_spec *chan,
> +			      enum iio_event_type type,
> +			      enum iio_event_direction dir,
> +			      enum iio_event_info info,
> +			      int *val, int *val2)
> +{
> +	u8 reg;
> +	u16 buf;
> +	int ret;
> +	unsigned int index;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +
> +	if (info != IIO_EV_INFO_VALUE)
> +		return -EINVAL;
> +
> +	/*
> +	 * Only proximity interrupts are implemented at the moment.
> +	 * Since we're inverting proximity values, the sensor's 'high'
> +	 * threshold will become our 'low' threshold, associated with
> +	 * 'near' events. Similarly, the sensor's 'low' threshold will
> +	 * be our 'high' threshold, associated with 'far' events.
> +	 */
> +	if (dir == IIO_EV_DIR_RISING)
> +		reg = STK3310_REG_THDL_PS;
> +	else if (dir == IIO_EV_DIR_FALLING)
> +		reg = STK3310_REG_THDH_PS;
> +	else
> +		return -EINVAL;
> +
> +	mutex_lock(&data->lock);
> +	ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
> +	mutex_unlock(&data->lock);
> +	if (ret < 0) {
> +		dev_err(&data->client->dev, "register read failed\n");
> +		return ret;
> +	}
> +	regmap_field_read(data->reg_ps_gain, &index);
> +	*val = swab16(stk3310_ps_max[index] - buf);
> +
> +	return IIO_VAL_INT;
> +}
> +
> +static int stk3310_write_event(struct iio_dev *indio_dev,
> +			       const struct iio_chan_spec *chan,
> +			       enum iio_event_type type,
> +			       enum iio_event_direction dir,
> +			       enum iio_event_info info,
> +			       int val, int val2)
> +{
> +	u8 reg;
> +	u16 buf;
> +	int ret;
> +	unsigned int index;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +	struct i2c_client *client = data->client;
> +
> +	regmap_field_read(data->reg_ps_gain, &index);
> +	if (val > stk3310_ps_max[index])
> +		return -EINVAL;
> +
> +	if (dir == IIO_EV_DIR_RISING)
> +		reg = STK3310_REG_THDL_PS;
> +	else if (dir == IIO_EV_DIR_FALLING)
> +		reg = STK3310_REG_THDH_PS;
> +	else
> +		return -EINVAL;
> +
> +	buf = swab16(stk3310_ps_max[index] - val);
> +	ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
> +	if (ret < 0)
> +		dev_err(&client->dev, "failed to set PS threshold!\n");
> +
> +	return ret;
> +}
> +
> +static int stk3310_read_event_config(struct iio_dev *indio_dev,
> +				     const struct iio_chan_spec *chan,
> +				     enum iio_event_type type,
> +				     enum iio_event_direction dir)
> +{
> +	unsigned int event_val;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +
> +	regmap_field_read(data->reg_int_ps, &event_val);
> +
> +	return event_val;
> +}
> +
> +static int stk3310_write_event_config(struct iio_dev *indio_dev,
> +				      const struct iio_chan_spec *chan,
> +				      enum iio_event_type type,
> +				      enum iio_event_direction dir,
> +				      int state)
> +{
> +	int ret;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +	struct i2c_client *client = data->client;
> +
> +	if (state < 0 || state > 7)
> +		return -EINVAL;
> +
> +	/* Set INT_PS value */
> +	mutex_lock(&data->lock);
> +	ret = regmap_field_write(data->reg_int_ps, state);
> +	if (ret < 0)
> +		dev_err(&client->dev, "failed to set interrupt mode\n");
> +	mutex_unlock(&data->lock);
> +
> +	return ret;
> +}
> +
>  static int stk3310_read_raw(struct iio_dev *indio_dev,
>  			    struct iio_chan_spec const *chan,
>  			    int *val, int *val2, long mask)
> @@ -266,6 +417,10 @@ static const struct iio_info stk3310_info = {
>  	.read_raw		= stk3310_read_raw,
>  	.write_raw		= stk3310_write_raw,
>  	.attrs			= &stk3310_attribute_group,
> +	.read_event_value	= stk3310_read_event,
> +	.write_event_value	= stk3310_write_event,
> +	.read_event_config	= stk3310_read_event_config,
> +	.write_event_config	= stk3310_write_event_config,
>  };
>  
>  static int stk3310_set_state(struct stk3310_data *data, u8 state)
> @@ -308,8 +463,43 @@ static int stk3310_init(struct iio_dev *indio_dev)
>  
>  	state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS;
>  	ret = stk3310_set_state(data, state);
> -	if (ret < 0)
> +	if (ret < 0) {
>  		dev_err(&client->dev, "failed to enable sensor");
> +		return ret;
> +	}
> +
> +	/* Enable PS interrupts */
> +	ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN);
> +	if (ret < 0)
> +		dev_err(&client->dev, "failed to enable interrupts!\n");
> +
> +	return ret;
> +}
> +
> +static int stk3310_gpio_probe(struct i2c_client *client)
> +{
> +	struct device *dev;
> +	struct gpio_desc *gpio;
> +	int ret;
> +
> +	if (!client)
> +		return -EINVAL;
> +
> +	dev = &client->dev;
> +
> +	/* gpio interrupt pin */
> +	gpio = devm_gpiod_get_index(dev, STK3310_GPIO, 0);
> +	if (IS_ERR(gpio)) {
> +		dev_err(dev, "acpi gpio get index failed\n");
> +		return PTR_ERR(gpio);
> +	}
> +
> +	ret = gpiod_direction_input(gpio);
> +	if (ret)
> +		return ret;
> +
> +	ret = gpiod_to_irq(gpio);
> +	dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
>  
>  	return ret;
>  }
> @@ -321,6 +511,7 @@ static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
>  	case STK3310_REG_ALS_DATA_LSB:
>  	case STK3310_REG_PS_DATA_LSB:
>  	case STK3310_REG_PS_DATA_MSB:
> +	case STK3310_REG_FLAG:
>  		return true;
>  	default:
>  		return false;
> @@ -354,10 +545,55 @@ static int stk3310_regmap_init(struct stk3310_data *data)
>  	STK3310_REGFIELD(ps_gain);
>  	STK3310_REGFIELD(als_it);
>  	STK3310_REGFIELD(ps_it);
> +	STK3310_REGFIELD(int_ps);
> +	STK3310_REGFIELD(flag_psint);
> +	STK3310_REGFIELD(flag_nf);
>  
>  	return 0;
>  }
>  
> +static irqreturn_t stk3310_irq_handler(int irq, void *private)
> +{
> +	struct iio_dev *indio_dev = private;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +
> +	data->timestamp = iio_get_time_ns();
> +
> +	return IRQ_WAKE_THREAD;
> +}
> +
> +static irqreturn_t stk3310_irq_event_handler(int irq, void *private)
> +{
> +	int ret;
> +	unsigned int dir;
> +	u64 event;
> +
> +	struct iio_dev *indio_dev = private;
> +	struct stk3310_data *data = iio_priv(indio_dev);
> +
> +	/* Read FLAG_NF to figure out what threshold has been met. */
> +	mutex_lock(&data->lock);
> +	ret = regmap_field_read(data->reg_flag_nf, &dir);
> +	if (ret < 0) {
> +		dev_err(&data->client->dev, "register read failed\n");
> +		mutex_unlock(&data->lock);
> +		return ret;
> +	}
> +	event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1,
> +				     IIO_EV_TYPE_THRESH,
> +				     (dir ? IIO_EV_DIR_RISING :
> +					    IIO_EV_DIR_FALLING));
> +	iio_push_event(indio_dev, event, data->timestamp);
> +
> +	/* Reset the interrupt flag */
> +	ret = regmap_field_write(data->reg_flag_psint, 0);
> +	if (ret < 0)
> +		dev_err(&data->client->dev, "failed to reset interrupts\n");
> +	mutex_unlock(&data->lock);
> +
> +	return IRQ_HANDLED;
> +}
> +
>  static int stk3310_probe(struct i2c_client *client,
>  			 const struct i2c_device_id *id)
>  {
> @@ -397,6 +633,21 @@ static int stk3310_probe(struct i2c_client *client,
>  		stk3310_set_state(data, STK3310_STATE_STANDBY);
>  	}
>  
> +	if (client->irq <= 0)
> +		client->irq = stk3310_gpio_probe(client);
GAH, Another one of these.  I must chase up what is going on with
trying to get this mess into the ACPI core!
> +
> +	if (client->irq >= 0) {
> +		ret = devm_request_threaded_irq(&client->dev, client->irq,
> +						stk3310_irq_handler,
> +						stk3310_irq_event_handler,
> +						IRQF_TRIGGER_FALLING |
> +						IRQF_ONESHOT,
> +						STK3310_EVENT, indio_dev);
> +		if (ret < 0)
> +			dev_err(&client->dev, "request irq %d failed\n",
> +					client->irq);
> +	}
> +
>  	return ret;
>  }
>  
> 

Re: [PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Octavian Purdila]

On Thu, May 7, 2015 at 1:31 PM, Jonathan Cameron <jic23@kernel.org> wrote:
>
> On 27/04/15 16:34, Tiberiu Breana wrote:
> > Added interrupt support for proximity threshold events
> > to the stk3310 driver.
> I've not objection to the split, but also wouldn't have minded having
> this in the original driver split (just in case you are doing it to make
> reviewing easier - in this sort of thing it makes little difference!)
> >
> > Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
> Again, nice patch.  My only comment below is about the fact I should
> find out what happened to the thoughts about moving the gpio/interrupt
> setup code into ACPI to avoid having the same 10 lines in every driver.
>

Mika send another version of the patch set and it was accepted and
merged into the GPIO tree:

https://lkml.org/lkml/2015/5/6/281

Re: [PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Jonathan Cameron]

On 20/05/15 10:46, Octavian Purdila wrote:
> On Thu, May 7, 2015 at 1:31 PM, Jonathan Cameron <jic23@kernel.org> wrote:
>>
>> On 27/04/15 16:34, Tiberiu Breana wrote:
>>> Added interrupt support for proximity threshold events
>>> to the stk3310 driver.
>> I've not objection to the split, but also wouldn't have minded having
>> this in the original driver split (just in case you are doing it to make
>> reviewing easier - in this sort of thing it makes little difference!)
>>>
>>> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
>> Again, nice patch.  My only comment below is about the fact I should
>> find out what happened to the thoughts about moving the gpio/interrupt
>> setup code into ACPI to avoid having the same 10 lines in every driver.
>>
> 
> Mika send another version of the patch set and it was accepted and
> merged into the GPIO tree:
> 
> https://lkml.org/lkml/2015/5/6/281
Cool.  Once that has worked it's way through yets
have a general cleanup of the cut and paste versions we have throughout
IIO.  Anyone want to take this on?

Jonathan

Re: [PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Jonathan Cameron]

On 22/05/15 18:54, Jonathan Cameron wrote:
> On 20/05/15 10:46, Octavian Purdila wrote:
>> On Thu, May 7, 2015 at 1:31 PM, Jonathan Cameron <jic23@kernel.org> wrote:
>>>
>>> On 27/04/15 16:34, Tiberiu Breana wrote:
>>>> Added interrupt support for proximity threshold events
>>>> to the stk3310 driver.
>>> I've not objection to the split, but also wouldn't have minded having
>>> this in the original driver split (just in case you are doing it to make
>>> reviewing easier - in this sort of thing it makes little difference!)
>>>>
>>>> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
>>> Again, nice patch.  My only comment below is about the fact I should
>>> find out what happened to the thoughts about moving the gpio/interrupt
>>> setup code into ACPI to avoid having the same 10 lines in every driver.
>>>
>>
>> Mika send another version of the patch set and it was accepted and
>> merged into the GPIO tree:
>>
>> https://lkml.org/lkml/2015/5/6/281
> Cool.  Once that has worked it's way through yets
let us
> have a general cleanup of the cut and paste versions we have throughout
> IIO.  Anyone want to take this on?
> 
> Jonathan
> 
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> 

Re: [PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Octavian Purdila]

On Fri, May 22, 2015 at 8:54 PM, Jonathan Cameron <jic23@kernel.org> wrote:
>
> On 20/05/15 10:46, Octavian Purdila wrote:
> > On Thu, May 7, 2015 at 1:31 PM, Jonathan Cameron <jic23@kernel.org> wrote:
> >>
> >> On 27/04/15 16:34, Tiberiu Breana wrote:
> >>> Added interrupt support for proximity threshold events
> >>> to the stk3310 driver.
> >> I've not objection to the split, but also wouldn't have minded having
> >> this in the original driver split (just in case you are doing it to make
> >> reviewing easier - in this sort of thing it makes little difference!)
> >>>
> >>> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
> >> Again, nice patch.  My only comment below is about the fact I should
> >> find out what happened to the thoughts about moving the gpio/interrupt
> >> setup code into ACPI to avoid having the same 10 lines in every driver.
> >>
> >
> > Mika send another version of the patch set and it was accepted and
> > merged into the GPIO tree:
> >
> > https://lkml.org/lkml/2015/5/6/281
> Cool.  Once that has worked it's way through yets
> have a general cleanup of the cut and paste versions we have throughout
> IIO.  Anyone want to take this on?
>

I have the patches ready and I will send them once Mika's patches
makes it into iio-dev/testing.

Re: [PATCH v3 2/2] iio: light: Add threshold interrupt support for STK3310

[Jonathan Cameron]

On 2 June 2015 21:47:39 BST, Octavian Purdila <octavian.purdila@intel.com> wrote:
>On Fri, May 22, 2015 at 8:54 PM, Jonathan Cameron <jic23@kernel.org>
>wrote:
>>
>> On 20/05/15 10:46, Octavian Purdila wrote:
>> > On Thu, May 7, 2015 at 1:31 PM, Jonathan Cameron <jic23@kernel.org>
>wrote:
>> >>
>> >> On 27/04/15 16:34, Tiberiu Breana wrote:
>> >>> Added interrupt support for proximity threshold events
>> >>> to the stk3310 driver.
>> >> I've not objection to the split, but also wouldn't have minded
>having
>> >> this in the original driver split (just in case you are doing it
>to make
>> >> reviewing easier - in this sort of thing it makes little
>difference!)
>> >>>
>> >>> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
>> >> Again, nice patch.  My only comment below is about the fact I
>should
>> >> find out what happened to the thoughts about moving the
>gpio/interrupt
>> >> setup code into ACPI to avoid having the same 10 lines in every
>driver.
>> >>
>> >
>> > Mika send another version of the patch set and it was accepted and
>> > merged into the GPIO tree:
>> >
>> > https://lkml.org/lkml/2015/5/6/281
>> Cool.  Once that has worked it's way through yets
>> have a general cleanup of the cut and paste versions we have
>throughout
>> IIO.  Anyone want to take this on?
>>
>
>I have the patches ready and I will send them once Mika's patches
>makes it into iio-dev/testing.
Cool!

Thanks for doing this.

J

-- 
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