* [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-20 8:36 ` Minkyu Kang
2013-02-06 13:18 ` [U-Boot] [PATCH 2/9 v9] EXYNOS5: Implement board_poweroff " Akshay Saraswat
` (7 subsequent siblings)
8 siblings, 1 reply; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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 v8:
- None.
arch/arm/include/asm/arch-exynos/exynos-tmu.h | 58 +++++
drivers/power/Makefile | 1 +
drivers/power/exynos-tmu.c | 302 +++++++++++++++++++++++++
include/tmu.h | 46 ++++
4 files changed, 407 insertions(+)
create mode 100644 arch/arm/include/asm/arch-exynos/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/exynos-tmu.h b/arch/arm/include/asm/arch-exynos/exynos-tmu.h
new file mode 100644
index 0000000..c79a520
--- /dev/null
+++ b/arch/arm/include/asm/arch-exynos/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 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_THERMAL_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..b010883
--- /dev/null
+++ b/drivers/power/exynos-tmu.c
@@ -0,0 +1,302 @@
+/*
+ * 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/exynos-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
+ */
+int get_cur_temp(struct tmu_info *info)
+{
+ int cur_temp;
+ struct tmu_reg *reg = (struct 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(®->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)
+{
+ if (gbl_info.tmu_state == TMU_STATUS_INIT)
+ return TMU_STATUS_INIT;
+
+ int cur_temp;
+ struct tmu_data *data = &gbl_info.data;
+
+ /* 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;
+ /* Temperature code does not lie between min 25 and max 125 */
+ } else {
+ 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
+ */
+int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
+{
+ 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;
+ }
+
+ return 0;
+}
+
+/*
+ * Calibrate and calculate threshold values and
+ * enable interrupt levels
+ *
+ * @param info pointer to the tmu_info struct
+ */
+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 tmu_reg *reg = (struct tmu_reg *)info->tmu_base;
+
+ /* Must reload for reading efuse value from triminfo register */
+ writel(TRIMINFO_RELOAD, ®->triminfo_control);
+
+ /* Get the compensation parameter */
+ te_code = readl(®->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, ®->threshold_temp_rise);
+ writel(cooling_temp, ®->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, ®->tmu_control);
+
+ writel(INTCLEARALL, ®->intclear);
+
+ /* TMU core enable */
+ con = readl(®->tmu_control);
+ con |= CORE_EN;
+
+ writel(con, ®->tmu_control);
+
+ /* LEV0 LEV1 LEV2 interrupt enable */
+ writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2, ®->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)
+ return -1;
+
+ tmu_setup_parameters(&gbl_info);
+ gbl_info.tmu_state = TMU_STATUS_NORMAL;
+ debug("EXYNOS_TMU: Available\n");
+
+ return 0;
+}
diff --git a/include/tmu.h b/include/tmu.h
new file mode 100644
index 0000000..17e9a85
--- /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 = 0,
+ TMU_STATUS_NORMAL,
+ 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_ */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit
2013-02-06 13:18 ` [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit Akshay Saraswat
@ 2013-02-20 8:36 ` Minkyu Kang
0 siblings, 0 replies; 15+ messages in thread
From: Minkyu Kang @ 2013-02-20 8:36 UTC (permalink / raw)
To: u-boot
Dear Akshay,
On 06/02/13 22:18, Akshay Saraswat wrote:
> 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 v8:
> - None.
>
> arch/arm/include/asm/arch-exynos/exynos-tmu.h | 58 +++++
> drivers/power/Makefile | 1 +
> drivers/power/exynos-tmu.c | 302 +++++++++++++++++++++++++
> include/tmu.h | 46 ++++
> 4 files changed, 407 insertions(+)
> create mode 100644 arch/arm/include/asm/arch-exynos/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/exynos-tmu.h b/arch/arm/include/asm/arch-exynos/exynos-tmu.h
> new file mode 100644
> index 0000000..c79a520
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-exynos/exynos-tmu.h
just tmu.h please.
> @@ -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 tmu_reg {
is it for exynos5? or exynos4? or both?
> + 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_THERMAL_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..b010883
> --- /dev/null
> +++ b/drivers/power/exynos-tmu.c
> @@ -0,0 +1,302 @@
> +/*
> + * 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/exynos-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
> + */
> +int get_cur_temp(struct tmu_info *info)
static?
> +{
> + int cur_temp;
> + struct tmu_reg *reg = (struct 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(®->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)
> +{
> + if (gbl_info.tmu_state == TMU_STATUS_INIT)
> + return TMU_STATUS_INIT;
> +
> + int cur_temp;
> + struct tmu_data *data = &gbl_info.data;
please move this declaration to start of function.
> +
> + /* 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;
> + /* Temperature code does not lie between min 25 and max 125 */
is this comment for what?
please move this comment to correct position.
> + } else {
> + 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
> + */
> +int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
static?
> +{
#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;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * Calibrate and calculate threshold values and
> + * enable interrupt levels
> + *
> + * @param info pointer to the tmu_info struct
> + */
> +void tmu_setup_parameters(struct tmu_info *info)
static?
> +{
> + 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 tmu_reg *reg = (struct tmu_reg *)info->tmu_base;
> +
> + /* Must reload for reading efuse value from triminfo register */
> + writel(TRIMINFO_RELOAD, ®->triminfo_control);
> +
> + /* Get the compensation parameter */
> + te_code = readl(®->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, ®->threshold_temp_rise);
> + writel(cooling_temp, ®->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, ®->tmu_control);
> +
> + writel(INTCLEARALL, ®->intclear);
> +
> + /* TMU core enable */
> + con = readl(®->tmu_control);
> + con |= CORE_EN;
> +
> + writel(con, ®->tmu_control);
> +
> + /* LEV0 LEV1 LEV2 interrupt enable */
> + writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2, ®->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)
> + return -1;
> +
> + tmu_setup_parameters(&gbl_info);
> + gbl_info.tmu_state = TMU_STATUS_NORMAL;
> + debug("EXYNOS_TMU: Available\n");
> +
> + return 0;
> +}
Thanks,
Minkyu Kang.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [U-Boot] [PATCH 2/9 v9] EXYNOS5: Implement board_poweroff for Thermal Management Unit
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-20 8:38 ` Minkyu Kang
2013-02-06 13:18 ` [U-Boot] [PATCH 3/9 v9] EXYNOS5: FDT: Add TMU device node values Akshay Saraswat
` (6 subsequent siblings)
8 siblings, 1 reply; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
Adding API in power for system shutdown when tripping value is reached
in Exynos Thermal Management Unit.
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v8:
- None.
arch/arm/cpu/armv7/exynos/power.c | 15 +++++++++++++++
arch/arm/include/asm/arch-exynos/power.h | 1 +
2 files changed, 16 insertions(+)
diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index d4bce6d..73f764e 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -95,3 +95,18 @@ void set_dp_phy_ctrl(unsigned int enable)
if (cpu_is_exynos5())
exynos5_dp_phy_control(enable);
}
+
+/*
+ * This function never returns.
+ * When called this function makes system hang and PAD driving value high
+ * which in turn makes system power down.
+ */
+void board_poweroff(void)
+{
+ struct exynos5_power *power =
+ (struct exynos5_power *)samsung_get_base_power();
+
+ clrbits_le32(&power->ps_hold_control, POWER_PS_HOLD_CONTROL_DATA_HIGH);
+
+ hang();
+}
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index d2fdb59..7463036 100644
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/arch/arm/include/asm/arch-exynos/power.h
@@ -863,5 +863,6 @@ void set_usbhost_phy_ctrl(unsigned int enable);
void set_dp_phy_ctrl(unsigned int enable);
#define EXYNOS_DP_PHY_ENABLE (1 << 0)
+#define POWER_PS_HOLD_CONTROL_DATA_HIGH (1 << 8)
#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 2/9 v9] EXYNOS5: Implement board_poweroff for Thermal Management Unit
2013-02-06 13:18 ` [U-Boot] [PATCH 2/9 v9] EXYNOS5: Implement board_poweroff " Akshay Saraswat
@ 2013-02-20 8:38 ` Minkyu Kang
0 siblings, 0 replies; 15+ messages in thread
From: Minkyu Kang @ 2013-02-20 8:38 UTC (permalink / raw)
To: u-boot
Dear Akshay,
On 06/02/13 22:18, Akshay Saraswat wrote:
> Adding API in power for system shutdown when tripping value is reached
> in Exynos Thermal Management Unit.
>
> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
> Acked-by: Simon Glass <sjg@chromium.org>
> ---
> Changes since v8:
> - None.
>
> arch/arm/cpu/armv7/exynos/power.c | 15 +++++++++++++++
> arch/arm/include/asm/arch-exynos/power.h | 1 +
> 2 files changed, 16 insertions(+)
>
> diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
> index d4bce6d..73f764e 100644
> --- a/arch/arm/cpu/armv7/exynos/power.c
> +++ b/arch/arm/cpu/armv7/exynos/power.c
> @@ -95,3 +95,18 @@ void set_dp_phy_ctrl(unsigned int enable)
> if (cpu_is_exynos5())
> exynos5_dp_phy_control(enable);
> }
> +
> +/*
> + * This function never returns.
> + * When called this function makes system hang and PAD driving value high
> + * which in turn makes system power down.
> + */
> +void board_poweroff(void)
> +{
> + struct exynos5_power *power =
> + (struct exynos5_power *)samsung_get_base_power();
> +
> + clrbits_le32(&power->ps_hold_control, POWER_PS_HOLD_CONTROL_DATA_HIGH);
> +
> + hang();
> +}
We can use set_ps_hold_ctrl function with little modification.
Could you please check this?
Thanks,
Minkyu Kang.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [U-Boot] [PATCH 3/9 v9] EXYNOS5: FDT: Add TMU device node values
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 2/9 v9] EXYNOS5: Implement board_poweroff " Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 4/9 v9] EXYNOS5: TMU: Add TMU init and status check Akshay Saraswat
` (5 subsequent siblings)
8 siblings, 0 replies; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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 v8:
- None.
arch/arm/dts/exynos5250.dtsi | 5 ++++
board/samsung/dts/exynos5250-smdk5250.dts | 12 ++++++++
doc/device-tree-bindings/exynos/tmu.txt | 46 +++++++++++++++++++++++++++++
include/fdtdec.h | 1 +
lib/fdtdec.c | 1 +
5 files changed, 65 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..b911a52
--- /dev/null
+++ b/doc/device-tree-bindings/exynos/tmu.txt
@@ -0,0 +1,46 @@
+Exynos Thermal management Unit
+
+The device node for TMU that is a part of Exynos5250
+SOC is as described in the document "Open Firmware Recommended
+Practice : Universal Serial Bus" with the following modifications
+and additions:
+
+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 f77d195..058fb51 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -79,6 +79,7 @@ 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 16921e1..4613fcd 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -54,6 +54,7 @@ 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)
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 4/9 v9] EXYNOS5: TMU: Add TMU init and status check
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
` (2 preceding siblings ...)
2013-02-06 13:18 ` [U-Boot] [PATCH 3/9 v9] EXYNOS5: FDT: Add TMU device node values Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-20 8:41 ` Minkyu Kang
2013-02-06 13:18 ` [U-Boot] [PATCH 5/9 v9] EXYNOS5: Config: Enable support for Exynos TMU driver Akshay Saraswat
` (4 subsequent siblings)
8 siblings, 1 reply; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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 v8:
- None.
board/samsung/smdk5250/smdk5250.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
index 7a5f132..7b9a8c5 100644
--- a/board/samsung/smdk5250/smdk5250.c
+++ b/board/samsung/smdk5250/smdk5250.c
@@ -35,9 +35,35 @@
#include <asm/arch/sromc.h>
#include <asm/arch/dp_info.h>
#include <power/pmic.h>
+#include <tmu.h>
DECLARE_GLOBAL_DATA_PTR;
+#if defined CONFIG_EXYNOS_TMU
+/*
+ * Boot Time Thermal Analysis for SoC temperature threshold breach
+ */
+void boot_temp_check(void)
+{
+ int temp;
+
+ switch (tmu_monitor(&temp)) {
+ case TMU_STATUS_TRIPPED:
+ puts("EXYNOS_TMU: TRIPPING! Device power going down ...\n");
+ board_poweroff();
+ break;
+ case TMU_STATUS_WARNING:
+ puts("EXYNOS_TMU: WARNING! Temperature very high\n");
+ break;
+ case TMU_STATUS_NORMAL:
+ break;
+ case TMU_STATUS_INIT:
+ default:
+ debug("Unknown TMU state\n");
+ }
+}
+#endif
+
#ifdef CONFIG_USB_EHCI_EXYNOS
int board_usb_vbus_init(void)
{
@@ -57,6 +83,15 @@ 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)) {
+ debug("%s: Failed to init TMU\n", __func__);
+ return -1;
+ }
+ boot_temp_check();
+#endif
+
#ifdef CONFIG_EXYNOS_SPI
spi_init();
#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 4/9 v9] EXYNOS5: TMU: Add TMU init and status check
2013-02-06 13:18 ` [U-Boot] [PATCH 4/9 v9] EXYNOS5: TMU: Add TMU init and status check Akshay Saraswat
@ 2013-02-20 8:41 ` Minkyu Kang
0 siblings, 0 replies; 15+ messages in thread
From: Minkyu Kang @ 2013-02-20 8:41 UTC (permalink / raw)
To: u-boot
On 06/02/13 22:18, Akshay Saraswat wrote:
> 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 v8:
> - None.
>
> board/samsung/smdk5250/smdk5250.c | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
> index 7a5f132..7b9a8c5 100644
> --- a/board/samsung/smdk5250/smdk5250.c
> +++ b/board/samsung/smdk5250/smdk5250.c
> @@ -35,9 +35,35 @@
> #include <asm/arch/sromc.h>
> #include <asm/arch/dp_info.h>
> #include <power/pmic.h>
> +#include <tmu.h>
>
> DECLARE_GLOBAL_DATA_PTR;
>
> +#if defined CONFIG_EXYNOS_TMU
> +/*
> + * Boot Time Thermal Analysis for SoC temperature threshold breach
> + */
> +void boot_temp_check(void)
static?
> +{
> + int temp;
> +
> + switch (tmu_monitor(&temp)) {
> + case TMU_STATUS_TRIPPED:
> + puts("EXYNOS_TMU: TRIPPING! Device power going down ...\n");
> + board_poweroff();
> + break;
> + case TMU_STATUS_WARNING:
> + puts("EXYNOS_TMU: WARNING! Temperature very high\n");
> + break;
> + case TMU_STATUS_NORMAL:
> + break;
no action? then please remove it.
> + case TMU_STATUS_INIT:
is it unknown state?
> + default:
> + debug("Unknown TMU state\n");
> + }
> +}
> +#endif
> +
> #ifdef CONFIG_USB_EHCI_EXYNOS
> int board_usb_vbus_init(void)
> {
> @@ -57,6 +83,15 @@ 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)) {
> + debug("%s: Failed to init TMU\n", __func__);
> + return -1;
> + }
> + boot_temp_check();
> +#endif
> +
> #ifdef CONFIG_EXYNOS_SPI
> spi_init();
> #endif
>
Thanks,
Minkyu Kang.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [U-Boot] [PATCH 5/9 v9] EXYNOS5: Config: Enable support for Exynos TMU driver
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
` (3 preceding siblings ...)
2013-02-06 13:18 ` [U-Boot] [PATCH 4/9 v9] EXYNOS5: TMU: Add TMU init and status check Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 6/9 v9] TMU: Add TMU support in dtt command Akshay Saraswat
` (3 subsequent siblings)
8 siblings, 0 replies; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
Enables TMU driver support for exynos5250
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v8:
- 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
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 6/9 v9] TMU: Add TMU support in dtt command
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
` (4 preceding siblings ...)
2013-02-06 13:18 ` [U-Boot] [PATCH 5/9 v9] EXYNOS5: Config: Enable support for Exynos TMU driver Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-06 16:36 ` Simon Glass
2013-02-06 13:18 ` [U-Boot] [PATCH 7/9 v9] EXYNOS5: Config: Enable dtt command for TMU Akshay Saraswat
` (2 subsequent siblings)
8 siblings, 1 reply; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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>
---
Changes since v8:
- Kept old code same and added dtt_i2c.
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..0c1cfdb 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() */
/***************************************************/
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 6/9 v9] TMU: Add TMU support in dtt command
2013-02-06 13:18 ` [U-Boot] [PATCH 6/9 v9] TMU: Add TMU support in dtt command Akshay Saraswat
@ 2013-02-06 16:36 ` Simon Glass
0 siblings, 0 replies; 15+ messages in thread
From: Simon Glass @ 2013-02-06 16:36 UTC (permalink / raw)
To: u-boot
Hi Akshay,
On Wed, Feb 6, 2013 at 5:18 AM, Akshay Saraswat <akshay.s@samsung.com> wrote:
> 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>
Yes that looks right, thanks.
Acked-by: Simon Glass <sjg@chromium.org>
> ---
> Changes since v8:
> - Kept old code same and added dtt_i2c.
>
> 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..0c1cfdb 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() */
>
> /***************************************************/
> --
> 1.7.9.5
>
^ permalink raw reply [flat|nested] 15+ messages in thread
* [U-Boot] [PATCH 7/9 v9] EXYNOS5: Config: Enable dtt command for TMU
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
` (5 preceding siblings ...)
2013-02-06 13:18 ` [U-Boot] [PATCH 6/9 v9] TMU: Add TMU support in dtt command Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 8/9 v9] EXYNOS5: TMU: Add hardware tripping Akshay Saraswat
2013-02-06 13:18 ` [U-Boot] [PATCH 9/9 v9] EXYNOS5: FDT: Add a H/W-trip member to TMU node Akshay Saraswat
8 siblings, 0 replies; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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 v8:
- 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
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 8/9 v9] EXYNOS5: TMU: Add hardware tripping
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
` (6 preceding siblings ...)
2013-02-06 13:18 ` [U-Boot] [PATCH 7/9 v9] EXYNOS5: Config: Enable dtt command for TMU Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
2013-02-20 8:46 ` Minkyu Kang
2013-02-06 13:18 ` [U-Boot] [PATCH 9/9 v9] EXYNOS5: FDT: Add a H/W-trip member to TMU node Akshay Saraswat
8 siblings, 1 reply; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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 v8:
- None.
arch/arm/cpu/armv7/exynos/power.c | 10 ++++++++++
arch/arm/include/asm/arch-exynos/power.h | 5 +++++
drivers/power/exynos-tmu.c | 25 ++++++++++++++++++++-----
3 files changed, 35 insertions(+), 5 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index 73f764e..234c9f4 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -96,6 +96,16 @@ void set_dp_phy_ctrl(unsigned int enable)
exynos5_dp_phy_control(enable);
}
+/* Enables hardware tripping to power off the system when TMU fails */
+void power_enable_hw_thermal_trip(void)
+{
+ 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);
+}
+
/*
* This function never returns.
* When called this function makes system hang and PAD driving value high
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index 7463036..034774f 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 power_enable_hw_thermal_trip(void);
+
#define POWER_USB_HOST_PHY_CTRL_EN (1 << 0)
#define POWER_USB_HOST_PHY_CTRL_DISABLE (0 << 0)
@@ -864,5 +867,7 @@ void set_dp_phy_ctrl(unsigned int enable);
#define EXYNOS_DP_PHY_ENABLE (1 << 0)
#define POWER_PS_HOLD_CONTROL_DATA_HIGH (1 << 8)
+#define POWER_ENABLE_HW_TRIP (1UL << 31)
+
#endif
diff --git a/drivers/power/exynos-tmu.c b/drivers/power/exynos-tmu.c
index b010883..5885ce7 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/exynos-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 */
@@ -195,6 +199,9 @@ 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;
@@ -228,7 +235,7 @@ int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
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;
@@ -252,9 +259,14 @@ 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, ®->threshold_temp_rise);
@@ -274,12 +286,15 @@ void tmu_setup_parameters(struct tmu_info *info)
/* TMU core enable */
con = readl(®->tmu_control);
- con |= CORE_EN;
+ con |= THERM_TRIP_EN | CORE_EN;
writel(con, ®->tmu_control);
- /* LEV0 LEV1 LEV2 interrupt enable */
- writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2, ®->inten);
+ /* Enable HW thermal trip */
+ power_enable_hw_thermal_trip();
+
+ /* LEV1 LEV2 interrupt enable */
+ writel(INTEN_RISE1 | INTEN_RISE2, ®->inten);
}
/*
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread* [U-Boot] [PATCH 8/9 v9] EXYNOS5: TMU: Add hardware tripping
2013-02-06 13:18 ` [U-Boot] [PATCH 8/9 v9] EXYNOS5: TMU: Add hardware tripping Akshay Saraswat
@ 2013-02-20 8:46 ` Minkyu Kang
0 siblings, 0 replies; 15+ messages in thread
From: Minkyu Kang @ 2013-02-20 8:46 UTC (permalink / raw)
To: u-boot
Dear Akshay,
On 06/02/13 22:18, Akshay Saraswat wrote:
> 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 v8:
> - None.
>
> arch/arm/cpu/armv7/exynos/power.c | 10 ++++++++++
> arch/arm/include/asm/arch-exynos/power.h | 5 +++++
> drivers/power/exynos-tmu.c | 25 ++++++++++++++++++++-----
> 3 files changed, 35 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
> index 73f764e..234c9f4 100644
> --- a/arch/arm/cpu/armv7/exynos/power.c
> +++ b/arch/arm/cpu/armv7/exynos/power.c
> @@ -96,6 +96,16 @@ void set_dp_phy_ctrl(unsigned int enable)
> exynos5_dp_phy_control(enable);
> }
>
> +/* Enables hardware tripping to power off the system when TMU fails */
> +void power_enable_hw_thermal_trip(void)
please change function name to set_hw_thermal_trip.
and this function should consider exynos4 also.
please refer other functions.
> +{
> + 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);
> +}
> +
> /*
> * This function never returns.
> * When called this function makes system hang and PAD driving value high
> diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
> index 7463036..034774f 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 power_enable_hw_thermal_trip(void);
> +
> #define POWER_USB_HOST_PHY_CTRL_EN (1 << 0)
> #define POWER_USB_HOST_PHY_CTRL_DISABLE (0 << 0)
>
> @@ -864,5 +867,7 @@ void set_dp_phy_ctrl(unsigned int enable);
>
> #define EXYNOS_DP_PHY_ENABLE (1 << 0)
> #define POWER_PS_HOLD_CONTROL_DATA_HIGH (1 << 8)
> +#define POWER_ENABLE_HW_TRIP (1UL << 31)
> +
please remove extra space.
>
> #endif
> diff --git a/drivers/power/exynos-tmu.c b/drivers/power/exynos-tmu.c
> index b010883..5885ce7 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/exynos-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 */
> @@ -195,6 +199,9 @@ 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;
> @@ -228,7 +235,7 @@ int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
> 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;
> @@ -252,9 +259,14 @@ 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, ®->threshold_temp_rise);
> @@ -274,12 +286,15 @@ void tmu_setup_parameters(struct tmu_info *info)
>
> /* TMU core enable */
> con = readl(®->tmu_control);
> - con |= CORE_EN;
> + con |= THERM_TRIP_EN | CORE_EN;
>
> writel(con, ®->tmu_control);
>
> - /* LEV0 LEV1 LEV2 interrupt enable */
> - writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2, ®->inten);
> + /* Enable HW thermal trip */
> + power_enable_hw_thermal_trip();
> +
> + /* LEV1 LEV2 interrupt enable */
> + writel(INTEN_RISE1 | INTEN_RISE2, ®->inten);
> }
>
> /*
>
Thanks,
Minkyu Kang.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [U-Boot] [PATCH 9/9 v9] EXYNOS5: FDT: Add a H/W-trip member to TMU node
2013-02-06 13:18 [U-Boot] [PATCH 0/9 v9] Add TMU support for Exynos5250 based SMDK5250 Akshay Saraswat
` (7 preceding siblings ...)
2013-02-06 13:18 ` [U-Boot] [PATCH 8/9 v9] EXYNOS5: TMU: Add hardware tripping Akshay Saraswat
@ 2013-02-06 13:18 ` Akshay Saraswat
8 siblings, 0 replies; 15+ messages in thread
From: Akshay Saraswat @ 2013-02-06 13:18 UTC (permalink / raw)
To: u-boot
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 v8:
- 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 b911a52..a7492f9 100644
--- a/doc/device-tree-bindings/exynos/tmu.txt
+++ b/doc/device-tree-bindings/exynos/tmu.txt
@@ -13,7 +13,9 @@ 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)
@@ -38,6 +40,7 @@ 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>;
--
1.7.9.5
^ permalink raw reply related [flat|nested] 15+ messages in thread