[U-Boot] [PATCH 0/8 v11] Add TMU support for Exynos5250 based SMDK5250

[U-Boot] [PATCH 0/8 v11] Add TMU support for Exynos5250 based SMDK5250

[Akshay Saraswat]

This patch series adds support for TMU driver using device tree for Exynos5250
based SMDK5250 board.

Changes since v10:
        - Patch-1: Renamed asm/arch/exynos-tmu.h to asm/arch/tmu.h.
        - Patch-2: None.
        - Patch-3: None.
        - Patch-4: None.
        - Patch-5: None.
        - Patch-6: None.
        - Patch-7: None.
        - Patch-8: None.

Akshay Saraswat (8):
  Exynos5: TMU: Add driver for Thermal Management Unit
  Exynos5: FDT: Add TMU device node values
  Exynos5: TMU: Add TMU init and status check
  Exynos5: Config: Enable support for Exynos TMU driver
  TMU: Add TMU support in dtt command
  Exynos5: Config: Enable dtt command for TMU
  Exynos5: TMU: Add hardware tripping
  Exynos5: FDT: Add a H/W-trip member to TMU node

 arch/arm/cpu/armv7/exynos/power.c         |  12 ++
 arch/arm/dts/exynos5250.dtsi              |   5 +
 arch/arm/include/asm/arch-exynos/power.h  |   4 +
 arch/arm/include/asm/arch-exynos/tmu.h    |  58 ++++++
 board/samsung/dts/exynos5250-smdk5250.dts |  13 ++
 board/samsung/smdk5250/smdk5250.c         |  39 ++++
 common/cmd_dtt.c                          |  32 ++-
 doc/device-tree-bindings/exynos/tmu.txt   |  44 +++++
 drivers/power/Makefile                    |   1 +
 drivers/power/exynos-tmu.c                | 319 ++++++++++++++++++++++++++++++
 include/configs/exynos5250-dt.h           |   5 +
 include/fdtdec.h                          |   1 +
 include/tmu.h                             |  46 +++++
 lib/fdtdec.c                              |   1 +
 14 files changed, 579 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/include/asm/arch-exynos/tmu.h
 create mode 100644 doc/device-tree-bindings/exynos/tmu.txt
 create mode 100644 drivers/power/exynos-tmu.c
 create mode 100644 include/tmu.h

-- 
1.8.0

[U-Boot] [PATCH 1/8 v11] Exynos5: TMU: Add driver for Thermal Management Unit

[Akshay Saraswat]

Adding Exynos Thermal Management Unit driver to monitor SOC
temperature and take actions corresponding to states of TMU.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- Renamed as/asch/exynos-tmu.h to asm/arch/tmu.h.

 arch/arm/include/asm/arch-exynos/tmu.h |  58 +++++++
 drivers/power/Makefile                 |   1 +
 drivers/power/exynos-tmu.c             | 304 +++++++++++++++++++++++++++++++++
 include/tmu.h                          |  46 +++++
 4 files changed, 409 insertions(+)
 create mode 100644 arch/arm/include/asm/arch-exynos/tmu.h
 create mode 100644 drivers/power/exynos-tmu.c
 create mode 100644 include/tmu.h

diff --git a/arch/arm/include/asm/arch-exynos/tmu.h b/arch/arm/include/asm/arch-exynos/tmu.h
new file mode 100644
index 0000000..31399b0
--- /dev/null
+++ b/arch/arm/include/asm/arch-exynos/tmu.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *      http://www.samsung.com
+ * Akshay Saraswat <akshay.s@samsung.com>
+ *
+ * EXYNOS - Thermal Management Unit
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __ASM_ARCH_TMU_H
+#define __ASM_ARCH_TMU_H
+
+struct exynos5_tmu_reg {
+	unsigned triminfo;
+	unsigned rsvd1;
+	unsigned rsvd2;
+	unsigned rsvd3;
+	unsigned rsvd4;
+	unsigned triminfo_control;
+	unsigned rsvd5;
+	unsigned rsvd6;
+	unsigned tmu_control;
+	unsigned rsvd7;
+	unsigned tmu_status;
+	unsigned sampling_internal;
+	unsigned counter_value0;
+	unsigned counter_value1;
+	unsigned rsvd8;
+	unsigned rsvd9;
+	unsigned current_temp;
+	unsigned rsvd10;
+	unsigned rsvd11;
+	unsigned rsvd12;
+	unsigned threshold_temp_rise;
+	unsigned threshold_temp_fall;
+	unsigned rsvd13;
+	unsigned rsvd14;
+	unsigned past_temp3_0;
+	unsigned past_temp7_4;
+	unsigned past_temp11_8;
+	unsigned past_temp15_12;
+	unsigned inten;
+	unsigned intstat;
+	unsigned intclear;
+	unsigned rsvd15;
+	unsigned emul_con;
+};
+#endif /* __ASM_ARCH_TMU_H */
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 8c71901..1dac16a 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -25,6 +25,7 @@ include $(TOPDIR)/config.mk
 
 LIB	:= $(obj)libpower.o
 
+COBJS-$(CONFIG_EXYNOS_TMU)	+= exynos-tmu.o
 COBJS-$(CONFIG_FTPMU010_POWER)	+= ftpmu010.o
 COBJS-$(CONFIG_TPS6586X_POWER)	+= tps6586x.o
 COBJS-$(CONFIG_TWL4030_POWER)	+= twl4030.o
diff --git a/drivers/power/exynos-tmu.c b/drivers/power/exynos-tmu.c
new file mode 100644
index 0000000..cc5ffee
--- /dev/null
+++ b/drivers/power/exynos-tmu.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *      http://www.samsung.com
+ * Akshay Saraswat <akshay.s@samsung.com>
+ *
+ * EXYNOS - Thermal Management Unit
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <tmu.h>
+#include <asm/arch/tmu.h>
+
+#define TRIMINFO_RELOAD		1
+#define CORE_EN			1
+
+#define INTEN_RISE0		1
+#define INTEN_RISE1		(1 << 4)
+#define INTEN_RISE2		(1 << 8)
+#define INTEN_FALL0		(1 << 16)
+#define INTEN_FALL1		(1 << 20)
+#define INTEN_FALL2		(1 << 24)
+
+#define TRIM_INFO_MASK		0xff
+
+#define INTCLEAR_RISE0		1
+#define INTCLEAR_RISE1		(1 << 4)
+#define INTCLEAR_RISE2		(1 << 8)
+#define INTCLEAR_FALL0		(1 << 16)
+#define INTCLEAR_FALL1		(1 << 20)
+#define INTCLEAR_FALL2		(1 << 24)
+#define INTCLEARALL		(INTCLEAR_RISE0 | INTCLEAR_RISE1 | \
+				 INTCLEAR_RISE2 | INTCLEAR_FALL0 | \
+				 INTCLEAR_FALL1 | INTCLEAR_FALL2)
+
+/* Tmeperature threshold values for various thermal events */
+struct temperature_params {
+	/* minimum value in temperature code range */
+	unsigned int min_val;
+	/* maximum value in temperature code range */
+	unsigned int max_val;
+	/* temperature threshold to start warning */
+	unsigned int start_warning;
+	/* temperature threshold CPU tripping */
+	unsigned int start_tripping;
+};
+
+/* Pre-defined values and thresholds for calibration of current temperature */
+struct tmu_data {
+	/* pre-defined temperature thresholds */
+	struct temperature_params ts;
+	/* pre-defined efuse range minimum value */
+	unsigned int efuse_min_value;
+	/* pre-defined efuse value for temperature calibration */
+	unsigned int efuse_value;
+	/* pre-defined efuse range maximum value */
+	unsigned int efuse_max_value;
+	/* current temperature sensing slope */
+	unsigned int slope;
+};
+
+/* TMU device specific details and status */
+struct tmu_info {
+	/* base Address for the TMU */
+	unsigned tmu_base;
+	/* pre-defined values for calibration and thresholds */
+	struct tmu_data data;
+	/* value required for triminfo_25 calibration */
+	unsigned int te1;
+	/* value required for triminfo_85 calibration */
+	unsigned int te2;
+	/* Value for measured data calibration */
+	int dc_value;
+	/* enum value indicating status of the TMU */
+	int tmu_state;
+};
+
+/* Global struct tmu_info variable to store init values */
+static struct tmu_info gbl_info;
+
+/*
+ * Get current temperature code from register,
+ * then calculate and calibrate it's value
+ * in degree celsius.
+ *
+ * @return	current temperature of the chip as sensed by TMU
+ */
+static int get_cur_temp(struct tmu_info *info)
+{
+	int cur_temp;
+	struct exynos5_tmu_reg *reg = (struct exynos5_tmu_reg *)info->tmu_base;
+
+	/*
+	 * Temperature code range between min 25 and max 125.
+	 * May run more than once for first call as initial sensing
+	 * has not yet happened.
+	 */
+	do {
+		cur_temp = readl(&reg->current_temp) & 0xff;
+	} while (cur_temp == 0 && info->tmu_state == TMU_STATUS_NORMAL);
+
+	/* Calibrate current temperature */
+	cur_temp = cur_temp - info->te1 + info->dc_value;
+
+	return cur_temp;
+}
+
+/*
+ * Monitors status of the TMU device and exynos temperature
+ *
+ * @param temp	pointer to the current temperature value
+ * @return	enum tmu_status_t value, code indicating event to execute
+ */
+enum tmu_status_t tmu_monitor(int *temp)
+{
+	int cur_temp;
+	struct tmu_data *data = &gbl_info.data;
+
+	if (gbl_info.tmu_state == TMU_STATUS_INIT)
+		return TMU_STATUS_INIT;
+
+	/* Read current temperature of the SOC */
+	cur_temp = get_cur_temp(&gbl_info);
+	*temp = cur_temp;
+
+	/* Temperature code lies between min 25 and max 125 */
+	if (cur_temp >= data->ts.start_tripping &&
+			cur_temp <= data->ts.max_val) {
+		return TMU_STATUS_TRIPPED;
+	} else if (cur_temp >= data->ts.start_warning) {
+		return TMU_STATUS_WARNING;
+	} else if (cur_temp < data->ts.start_warning &&
+			cur_temp >= data->ts.min_val) {
+		return TMU_STATUS_NORMAL;
+	} else {
+		/* Temperature code does not lie between min 25 and max 125 */
+		gbl_info.tmu_state = TMU_STATUS_INIT;
+		debug("EXYNOS_TMU: Thermal reading failed\n");
+		return TMU_STATUS_INIT;
+	}
+}
+
+/*
+ * Get TMU specific pre-defined values from FDT
+ *
+ * @param info	pointer to the tmu_info struct
+ * @param blob  FDT blob
+ * @return	int value, 0 for success
+ */
+static int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
+{
+#ifdef CONFIG_OF_CONTROL
+	int node;
+	int error = 0;
+
+	/* Get the node from FDT for TMU */
+	node = fdtdec_next_compatible(blob, 0,
+				      COMPAT_SAMSUNG_EXYNOS_TMU);
+	if (node < 0) {
+		debug("EXYNOS_TMU: No node for tmu in device tree\n");
+		return -1;
+	}
+
+	/*
+	 * Get the pre-defined TMU specific values from FDT.
+	 * All of these are expected to be correct otherwise
+	 * miscalculation of register values in tmu_setup_parameters
+	 * may result in misleading current temperature.
+	 */
+	info->tmu_base = fdtdec_get_addr(blob, node, "reg");
+	if (info->tmu_base == FDT_ADDR_T_NONE) {
+		debug("%s: Missing tmu-base\n", __func__);
+		return -1;
+	}
+	info->data.ts.min_val = fdtdec_get_int(blob,
+				node, "samsung,min-temp", -1);
+	error |= info->data.ts.min_val;
+	info->data.ts.max_val = fdtdec_get_int(blob,
+				node, "samsung,max-temp", -1);
+	error |= info->data.ts.max_val;
+	info->data.ts.start_warning = fdtdec_get_int(blob,
+				node, "samsung,start-warning", -1);
+	error |= info->data.ts.start_warning;
+	info->data.ts.start_tripping = fdtdec_get_int(blob,
+				node, "samsung,start-tripping", -1);
+	error |= info->data.ts.start_tripping;
+	info->data.efuse_min_value = fdtdec_get_int(blob,
+				node, "samsung,efuse-min-value", -1);
+	error |= info->data.efuse_min_value;
+	info->data.efuse_value = fdtdec_get_int(blob,
+				node, "samsung,efuse-value", -1);
+	error |= info->data.efuse_value;
+	info->data.efuse_max_value = fdtdec_get_int(blob,
+				node, "samsung,efuse-max-value", -1);
+	error |= info->data.efuse_max_value;
+	info->data.slope = fdtdec_get_int(blob,
+				node, "samsung,slope", -1);
+	error |= info->data.slope;
+	info->dc_value = fdtdec_get_int(blob,
+				node, "samsung,dc-value", -1);
+	error |= info->dc_value;
+
+	if (error == -1) {
+		debug("fail to get tmu node properties\n");
+		return -1;
+	}
+#endif
+
+	return 0;
+}
+
+/*
+ * Calibrate and calculate threshold values and
+ * enable interrupt levels
+ *
+ * @param	info pointer to the tmu_info struct
+ */
+static void tmu_setup_parameters(struct tmu_info *info)
+{
+	unsigned int te_code, con;
+	unsigned int warning_code, trip_code;
+	unsigned int cooling_temp;
+	unsigned int rising_value;
+	struct tmu_data *data = &info->data;
+	struct exynos5_tmu_reg *reg = (struct exynos5_tmu_reg *)info->tmu_base;
+
+	/* Must reload for reading efuse value from triminfo register */
+	writel(TRIMINFO_RELOAD, &reg->triminfo_control);
+
+	/* Get the compensation parameter */
+	te_code = readl(&reg->triminfo);
+	info->te1 = te_code & TRIM_INFO_MASK;
+	info->te2 = ((te_code >> 8) & TRIM_INFO_MASK);
+
+	if ((data->efuse_min_value > info->te1) ||
+			(info->te1 > data->efuse_max_value)
+			||  (info->te2 != 0))
+		info->te1 = data->efuse_value;
+
+	/* Get RISING & FALLING Threshold value */
+	warning_code = data->ts.start_warning
+			+ info->te1 - info->dc_value;
+	trip_code = data->ts.start_tripping
+			+ info->te1 - info->dc_value;
+	cooling_temp = 0;
+
+	rising_value = ((warning_code << 8) | (trip_code << 16));
+
+	/* Set interrupt level */
+	writel(rising_value, &reg->threshold_temp_rise);
+	writel(cooling_temp, &reg->threshold_temp_fall);
+
+	/*
+	 * Init TMU control tuning parameters
+	 * [28:24] VREF - Voltage reference
+	 * [15:13] THERM_TRIP_MODE - Tripping mode
+	 * [12] THERM_TRIP_EN - Thermal tripping enable
+	 * [11:8] BUF_SLOPE_SEL - Gain of amplifier
+	 * [6] THERM_TRIP_BY_TQ_EN - Tripping by TQ pin
+	 */
+	writel(data->slope, &reg->tmu_control);
+
+	writel(INTCLEARALL, &reg->intclear);
+
+	/* TMU core enable */
+	con = readl(&reg->tmu_control);
+	con |= CORE_EN;
+
+	writel(con, &reg->tmu_control);
+
+	/* LEV0 LEV1 LEV2 interrupt enable */
+	writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2,	&reg->inten);
+}
+
+/*
+ * Initialize TMU device
+ *
+ * @param blob  FDT blob
+ * @return	int value, 0 for success
+ */
+int tmu_init(const void *blob)
+{
+	gbl_info.tmu_state = TMU_STATUS_INIT;
+	if (get_tmu_fdt_values(&gbl_info, blob) < 0)
+		goto ret;
+
+	tmu_setup_parameters(&gbl_info);
+	gbl_info.tmu_state = TMU_STATUS_NORMAL;
+ret:
+
+	return gbl_info.tmu_state;
+}
diff --git a/include/tmu.h b/include/tmu.h
new file mode 100644
index 0000000..da07a22
--- /dev/null
+++ b/include/tmu.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *      http://www.samsung.com
+ * Akshay Saraswat <akshay.s@samsung.com>
+ *
+ * Thermal Management Unit
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _TMU_H
+#define _TMU_H
+
+enum tmu_status_t {
+	TMU_STATUS_INIT = -1,
+	TMU_STATUS_NORMAL = 0,
+	TMU_STATUS_WARNING,
+	TMU_STATUS_TRIPPED,
+};
+
+/*
+ * Monitors status of the TMU device and exynos temperature
+ *
+ * @param temp	pointer to the current temperature value
+ * @return	enum tmu_status_t value, code indicating event to execute
+ *		and -1 on error
+ */
+enum tmu_status_t tmu_monitor(int *temp);
+
+/*
+ * Initialize TMU device
+ *
+ * @param blob  FDT blob
+ * @return	int value, 0 for success
+ */
+int tmu_init(const void *blob);
+#endif	/* _THERMAL_H_ */
-- 
1.8.0

[U-Boot] [PATCH 2/8 v11] Exynos5: FDT: Add TMU device node values

[Akshay Saraswat]

Fdt entry for Exynos TMU driver specific pre-defined values used for
calibration of current temperature and defining threshold values.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 arch/arm/dts/exynos5250.dtsi              |  5 ++++
 board/samsung/dts/exynos5250-smdk5250.dts | 12 +++++++++
 doc/device-tree-bindings/exynos/tmu.txt   | 41 +++++++++++++++++++++++++++++++
 include/fdtdec.h                          |  1 +
 lib/fdtdec.c                              |  1 +
 5 files changed, 60 insertions(+)
 create mode 100644 doc/device-tree-bindings/exynos/tmu.txt

diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi
index ed8c8dd..61d35a8 100644
--- a/arch/arm/dts/exynos5250.dtsi
+++ b/arch/arm/dts/exynos5250.dtsi
@@ -151,4 +151,9 @@
 		};
 	};
 
+	tmu at 10060000 {
+		compatible = "samsung,exynos-tmu";
+		reg = <0x10060000 0x10000>;
+	};
+
 };
diff --git a/board/samsung/dts/exynos5250-smdk5250.dts b/board/samsung/dts/exynos5250-smdk5250.dts
index cbfab6f..00dac40 100644
--- a/board/samsung/dts/exynos5250-smdk5250.dts
+++ b/board/samsung/dts/exynos5250-smdk5250.dts
@@ -66,4 +66,16 @@
 			compatible = "maxim,max77686_pmic";
 		};
 	};
+
+	tmu at 10060000 {
+		samsung,min-temp	= <25>;
+		samsung,max-temp	= <125>;
+		samsung,start-warning	= <95>;
+		samsung,start-tripping	= <105>;
+		samsung,efuse-min-value	= <40>;
+		samsung,efuse-value	= <55>;
+		samsung,efuse-max-value	= <100>;
+		samsung,slope		= <274761730>;
+		samsung,dc-value	= <25>;
+	};
 };
diff --git a/doc/device-tree-bindings/exynos/tmu.txt b/doc/device-tree-bindings/exynos/tmu.txt
new file mode 100644
index 0000000..bb734dc
--- /dev/null
+++ b/doc/device-tree-bindings/exynos/tmu.txt
@@ -0,0 +1,41 @@
+Exynos Thermal management Unit
+
+Required properties:
+
+ - compatible : Should be "samsung,exynos-tmu" for TMU
+ - samsung,min-temp : Minimum temperature value (25 degree celsius)
+	- Current temperature of SoC should be more than this value.
+ - samsung,max-temp : Maximum temperature value (125 degree celsius)
+	- Current temperature of SoC should be less than this value.
+ - samsung,start-warning : Temperature at which TMU starts giving warning (degree celsius)
+ - samsung,start-tripping : Temperature at which system will trip and shutdown (degree celsius)
+ - samsung,efuse-min-value : SOC efuse min value (Constant 40)
+	- efuse-value should be more than this value.
+ - samsung,efuse-value : SOC actual efuse value (Literal value)
+	- This is the data trimming info.
+	- This value is used to calculate measuring error.
+ - samsung,efuse-max-value : SoC max efuse value (Constant 100)
+	- efuse-value should be less than this value.
+ - samsung,slope : Default value 274761730 (Constant 0x1060_8802).
+	- This is the default value for TMU_CONTROL register.
+	- It sets the gain of amplifier to the positive-tc generator block.
+	- It selects thermal tripping mode and enables thermal tripping.
+ - samsung,dc-value : Measured data calibration value (Constant 25)
+	- Used for tempearture calculation.
+	- This is 25 because temperature measured is always above 25 degrees.
+
+
+Example:
+
+tmu at 10060000 {
+	compatible = "samsung,exynos-tmu"
+	samsung,min-temp = <25>;
+	samsung,max-temp = <125>;
+	samsung,start-warning = <95>;
+	samsung,start-tripping = <105>;
+	samsung,efuse-min-value = <40>;
+	samsung,efuse-value = <55>;
+	samsung,efuse-max-value = <100>;
+	samsung,slope = <274761730>;
+	samsung,dc-value = <25>;
+};
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 77f244f..b9301c8 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -81,6 +81,7 @@ enum fdt_compat_id {
 	COMPAT_SAMSUNG_EXYNOS_EHCI,	/* Exynos EHCI controller */
 	COMPAT_SAMSUNG_EXYNOS_USB_PHY,	/* Exynos phy controller for usb2.0 */
 	COMPAT_MAXIM_MAX77686_PMIC,	/* MAX77686 PMIC */
+	COMPAT_SAMSUNG_EXYNOS_TMU,	/* Exynos TMU */
 
 	COMPAT_COUNT,
 };
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 3ae348d..5c427ff 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -56,6 +56,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
 	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
 	COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
+	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
 };
 
 const char *fdtdec_get_compatible(enum fdt_compat_id id)
-- 
1.8.0

[U-Boot] [PATCH 3/8 v11] Exynos5: TMU: Add TMU init and status check

[Akshay Saraswat]

This adds call to tmu_init() and TMU boot time analysis
for the SoC temperature threshold breach.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 board/samsung/smdk5250/smdk5250.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
index ffc5ee5..89247d9 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -37,9 +37,39 @@
 #include <asm/arch/dp_info.h>
 #include <power/pmic.h>
 #include <power/max77686_pmic.h>
+#include <tmu.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined CONFIG_EXYNOS_TMU
+/*
+ * Boot Time Thermal Analysis for SoC temperature threshold breach
+ */
+static void boot_temp_check(void)
+{
+	int temp;
+
+	switch (tmu_monitor(&temp)) {
+	/* Status TRIPPED ans WARNING means corresponding threshold breach */
+	case TMU_STATUS_TRIPPED:
+		puts("EXYNOS_TMU: TRIPPING! Device power going down ...\n");
+		set_ps_hold_ctrl();
+		hang();
+		break;
+	case TMU_STATUS_WARNING:
+		puts("EXYNOS_TMU: WARNING! Temperature very high\n");
+		break;
+	/*
+	 * TMU_STATUS_INIT means something is wrong with temperature sensing
+	 * and TMU status was changed back from NORMAL to INIT.
+	 */
+	case TMU_STATUS_INIT:
+	default:
+		debug("EXYNOS_TMU: Unknown TMU state\n");
+	}
+}
+#endif
+
 #ifdef CONFIG_USB_EHCI_EXYNOS
 int board_usb_vbus_init(void)
 {
@@ -59,6 +89,15 @@ int board_usb_vbus_init(void)
 int board_init(void)
 {
 	gd->bd->bi_boot_params = (PHYS_SDRAM_1 + 0x100UL);
+
+#if defined CONFIG_EXYNOS_TMU
+	if (tmu_init(gd->fdt_blob) != TMU_STATUS_NORMAL) {
+		debug("%s: Failed to init TMU\n", __func__);
+		return -1;
+	}
+	boot_temp_check();
+#endif
+
 #ifdef CONFIG_EXYNOS_SPI
 	spi_init();
 #endif
-- 
1.8.0

[U-Boot] [PATCH 4/8 v11] Exynos5: Config: Enable support for Exynos TMU driver

[Akshay Saraswat]

Enables TMU driver support for exynos5250

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 include/configs/exynos5250-dt.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h
index cabd2f2..53ca41f 100644
--- a/include/configs/exynos5250-dt.h
+++ b/include/configs/exynos5250-dt.h
@@ -117,6 +117,9 @@
 #define CONFIG_BOOTDELAY		3
 #define CONFIG_ZERO_BOOTDELAY_CHECK
 
+/* Thermal Management Unit */
+#define CONFIG_EXYNOS_TMU
+
 /* USB */
 #define CONFIG_CMD_USB
 #define CONFIG_USB_EHCI
-- 
1.8.0

[U-Boot] [PATCH 5/8 v11] TMU: Add TMU support in dtt command

[Akshay Saraswat]

Add generic TMU support alongwith i2c sensors in dtt command
to enable temperature reading in cases where TMU is present
along-with/instead-of i2c sensors.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 common/cmd_dtt.c | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index cd94423..edbd4a8 100644
--- a/common/cmd_dtt.c
+++ b/common/cmd_dtt.c
@@ -27,7 +27,9 @@
 
 #include <dtt.h>
 #include <i2c.h>
+#include <tmu.h>
 
+#if defined CONFIG_DTT_SENSORS
 static unsigned long sensor_initialized;
 
 static void _initialize_dtt(void)
@@ -59,9 +61,11 @@ void dtt_init(void)
 	/* switch back to original I2C bus */
 	I2C_SET_BUS(old_bus);
 }
+#endif
 
-int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+int dtt_i2c(void)
 {
+#if defined CONFIG_DTT_SENSORS
 	int i;
 	unsigned char sensors[] = CONFIG_DTT_SENSORS;
 	int old_bus;
@@ -83,8 +87,34 @@ int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 
 	/* switch back to original I2C bus */
 	I2C_SET_BUS(old_bus);
+#endif
 
 	return 0;
+}
+
+int dtt_tmu(void)
+{
+#if defined CONFIG_TMU_CMD_DTT
+	int cur_temp;
+
+	/* Sense and return latest thermal info */
+	if (tmu_monitor(&cur_temp) == TMU_STATUS_INIT) {
+		puts("TMU is in unknown state, temperature is invalid\n");
+		return -1;
+	}
+	printf("Current temperature: %u degrees Celsius\n", cur_temp);
+#endif
+	return 0;
+}
+
+int do_dtt(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	int err = 0;
+
+	err |= dtt_i2c();
+	err |= dtt_tmu();
+
+	return err;
 }	/* do_dtt() */
 
 /***************************************************/
-- 
1.8.0

[U-Boot] [PATCH 6/8 v11] Exynos5: Config: Enable dtt command for TMU

[Akshay Saraswat]

This enables the dtt command to read the current SOC
temperature with the help of TMU

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 include/configs/exynos5250-dt.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h
index 53ca41f..8a8e9fe 100644
--- a/include/configs/exynos5250-dt.h
+++ b/include/configs/exynos5250-dt.h
@@ -119,6 +119,8 @@
 
 /* Thermal Management Unit */
 #define CONFIG_EXYNOS_TMU
+#define CONFIG_CMD_DTT
+#define CONFIG_TMU_CMD_DTT
 
 /* USB */
 #define CONFIG_CMD_USB
-- 
1.8.0

[U-Boot] [PATCH 7/8 v11] Exynos5: TMU: Add hardware tripping

[Akshay Saraswat]

This adds hardware tripping at 110 degrees celsius which must enable
forced system shutdown in case TMU fails to power off.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 arch/arm/cpu/armv7/exynos/power.c        | 12 ++++++++++++
 arch/arm/include/asm/arch-exynos/power.h |  4 ++++
 drivers/power/exynos-tmu.c               | 25 ++++++++++++++++++++-----
 3 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index 400c8bc..363c20a 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -111,3 +111,15 @@ void set_ps_hold_ctrl(void)
 	if (cpu_is_exynos5())
 		exynos5_set_ps_hold_ctrl();
 }
+
+/* Enables hardware tripping to power off the system when TMU fails */
+void set_hw_thermal_trip(void)
+{
+	if (cpu_is_exynos5()) {
+		struct exynos5_power *power =
+			(struct exynos5_power *)samsung_get_base_power();
+
+		/* PS_HOLD_CONTROL register ENABLE_HW_TRIP bit*/
+		setbits_le32(&power->ps_hold_control, POWER_ENABLE_HW_TRIP);
+	}
+}
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index f2f73fa..e409b24 100644
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/arch/arm/include/asm/arch-exynos/power.h
@@ -857,6 +857,9 @@ void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable);
 
 void set_usbhost_phy_ctrl(unsigned int enable);
 
+/* Enables hardware tripping to power off the system when TMU fails */
+void set_hw_thermal_trip(void);
+
 #define POWER_USB_HOST_PHY_CTRL_EN		(1 << 0)
 #define POWER_USB_HOST_PHY_CTRL_DISABLE		(0 << 0)
 
@@ -865,6 +868,7 @@ void set_dp_phy_ctrl(unsigned int enable);
 #define EXYNOS_DP_PHY_ENABLE		(1 << 0)
 
 #define EXYNOS_PS_HOLD_CONTROL_DATA_HIGH	(1 << 8)
+#define POWER_ENABLE_HW_TRIP			(1UL << 31)
 
 /*
  * Set ps_hold data driving value high
diff --git a/drivers/power/exynos-tmu.c b/drivers/power/exynos-tmu.c
index cc5ffee..f4fa9e1 100644
--- a/drivers/power/exynos-tmu.c
+++ b/drivers/power/exynos-tmu.c
@@ -22,9 +22,11 @@
 #include <fdtdec.h>
 #include <tmu.h>
 #include <asm/arch/tmu.h>
+#include <asm/arch/power.h>
 
 #define TRIMINFO_RELOAD		1
 #define CORE_EN			1
+#define THERM_TRIP_EN		(1 << 12)
 
 #define INTEN_RISE0		1
 #define INTEN_RISE1		(1 << 4)
@@ -55,6 +57,8 @@ struct temperature_params {
 	unsigned int start_warning;
 	/* temperature threshold CPU tripping */
 	unsigned int start_tripping;
+	/* temperature threshold for HW tripping */
+	unsigned int hardware_tripping;
 };
 
 /* Pre-defined values and thresholds for calibration of current temperature */
@@ -196,6 +200,9 @@ static int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
 	info->data.ts.start_tripping = fdtdec_get_int(blob,
 				node, "samsung,start-tripping", -1);
 	error |= info->data.ts.start_tripping;
+	info->data.ts.hardware_tripping = fdtdec_get_int(blob,
+				node, "samsung,hw-tripping", -1);
+	error |= info->data.ts.hardware_tripping;
 	info->data.efuse_min_value = fdtdec_get_int(blob,
 				node, "samsung,efuse-min-value", -1);
 	error |= info->data.efuse_min_value;
@@ -230,7 +237,7 @@ static int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
 static void tmu_setup_parameters(struct tmu_info *info)
 {
 	unsigned int te_code, con;
-	unsigned int warning_code, trip_code;
+	unsigned int warning_code, trip_code, hwtrip_code;
 	unsigned int cooling_temp;
 	unsigned int rising_value;
 	struct tmu_data *data = &info->data;
@@ -254,9 +261,14 @@ static void tmu_setup_parameters(struct tmu_info *info)
 			+ info->te1 - info->dc_value;
 	trip_code = data->ts.start_tripping
 			+ info->te1 - info->dc_value;
+	hwtrip_code = data->ts.hardware_tripping
+			+ info->te1 - info->dc_value;
+
 	cooling_temp = 0;
 
-	rising_value = ((warning_code << 8) | (trip_code << 16));
+	rising_value = ((warning_code << 8) |
+			(trip_code << 16) |
+			(hwtrip_code << 24));
 
 	/* Set interrupt level */
 	writel(rising_value, &reg->threshold_temp_rise);
@@ -276,12 +288,15 @@ static void tmu_setup_parameters(struct tmu_info *info)
 
 	/* TMU core enable */
 	con = readl(&reg->tmu_control);
-	con |= CORE_EN;
+	con |= THERM_TRIP_EN | CORE_EN;
 
 	writel(con, &reg->tmu_control);
 
-	/* LEV0 LEV1 LEV2 interrupt enable */
-	writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2,	&reg->inten);
+	/* Enable HW thermal trip */
+	set_hw_thermal_trip();
+
+	/* LEV1 LEV2 interrupt enable */
+	writel(INTEN_RISE1 | INTEN_RISE2, &reg->inten);
 }
 
 /*
-- 
1.8.0

[U-Boot] [PATCH 8/8 v11] Exynos5: FDT: Add a H/W-trip member to TMU node

[Akshay Saraswat]

This adds a member to TMU FDT node for providing hardware
tripping temperature threshold.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v10:
	- None.

 board/samsung/dts/exynos5250-smdk5250.dts | 1 +
 doc/device-tree-bindings/exynos/tmu.txt   | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/board/samsung/dts/exynos5250-smdk5250.dts b/board/samsung/dts/exynos5250-smdk5250.dts
index 00dac40..1c2d52d 100644
--- a/board/samsung/dts/exynos5250-smdk5250.dts
+++ b/board/samsung/dts/exynos5250-smdk5250.dts
@@ -72,6 +72,7 @@
 		samsung,max-temp	= <125>;
 		samsung,start-warning	= <95>;
 		samsung,start-tripping	= <105>;
+		samsung,hw-tripping	= <110>;
 		samsung,efuse-min-value	= <40>;
 		samsung,efuse-value	= <55>;
 		samsung,efuse-max-value	= <100>;
diff --git a/doc/device-tree-bindings/exynos/tmu.txt b/doc/device-tree-bindings/exynos/tmu.txt
index bb734dc..89d3bf0 100644
--- a/doc/device-tree-bindings/exynos/tmu.txt
+++ b/doc/device-tree-bindings/exynos/tmu.txt
@@ -8,7 +8,9 @@ Required properties:
  - samsung,max-temp : Maximum temperature value (125 degree celsius)
 	- Current temperature of SoC should be less than this value.
  - samsung,start-warning : Temperature at which TMU starts giving warning (degree celsius)
- - samsung,start-tripping : Temperature at which system will trip and shutdown (degree celsius)
+ - samsung,start-tripping : Temperature at which TMU shuts down the system (degree celsius)
+ - samsung,hw-tripping : Temperature at which hardware tripping should happen
+	in case TMU fails to power off (degree celsius)
  - samsung,efuse-min-value : SOC efuse min value (Constant 40)
 	- efuse-value should be more than this value.
  - samsung,efuse-value : SOC actual efuse value (Literal value)
@@ -33,6 +35,7 @@ tmu at 10060000 {
 	samsung,max-temp = <125>;
 	samsung,start-warning = <95>;
 	samsung,start-tripping = <105>;
+	samsung,hw-tripping = <110>;
 	samsung,efuse-min-value = <40>;
 	samsung,efuse-value = <55>;
 	samsung,efuse-max-value = <100>;
-- 
1.8.0

[U-Boot] [PATCH 0/8 v11] Add TMU support for Exynos5250 based SMDK5250

[Minkyu Kang]

On 25/02/13 20:12, Akshay Saraswat wrote:
> This patch series adds support for TMU driver using device tree for Exynos5250
> based SMDK5250 board.
> 
> Changes since v10:
>         - Patch-1: Renamed asm/arch/exynos-tmu.h to asm/arch/tmu.h.
>         - Patch-2: None.
>         - Patch-3: None.
>         - Patch-4: None.
>         - Patch-5: None.
>         - Patch-6: None.
>         - Patch-7: None.
>         - Patch-8: None.
> 
> Akshay Saraswat (8):
>   Exynos5: TMU: Add driver for Thermal Management Unit
>   Exynos5: FDT: Add TMU device node values
>   Exynos5: TMU: Add TMU init and status check
>   Exynos5: Config: Enable support for Exynos TMU driver
>   TMU: Add TMU support in dtt command
>   Exynos5: Config: Enable dtt command for TMU
>   Exynos5: TMU: Add hardware tripping
>   Exynos5: FDT: Add a H/W-trip member to TMU node
> 
>  arch/arm/cpu/armv7/exynos/power.c         |  12 ++
>  arch/arm/dts/exynos5250.dtsi              |   5 +
>  arch/arm/include/asm/arch-exynos/power.h  |   4 +
>  arch/arm/include/asm/arch-exynos/tmu.h    |  58 ++++++
>  board/samsung/dts/exynos5250-smdk5250.dts |  13 ++
>  board/samsung/smdk5250/smdk5250.c         |  39 ++++
>  common/cmd_dtt.c                          |  32 ++-
>  doc/device-tree-bindings/exynos/tmu.txt   |  44 +++++
>  drivers/power/Makefile                    |   1 +
>  drivers/power/exynos-tmu.c                | 319 ++++++++++++++++++++++++++++++
>  include/configs/exynos5250-dt.h           |   5 +
>  include/fdtdec.h                          |   1 +
>  include/tmu.h                             |  46 +++++
>  lib/fdtdec.c                              |   1 +
>  14 files changed, 579 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm/include/asm/arch-exynos/tmu.h
>  create mode 100644 doc/device-tree-bindings/exynos/tmu.txt
>  create mode 100644 drivers/power/exynos-tmu.c
>  create mode 100644 include/tmu.h
> 

applied to u-boot-samsung.

Thanks,
Minkyu Kang.