* [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
0 siblings, 1 reply; 3+ 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] 3+ 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; 3+ 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] 3+ messages in thread
* [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit
[not found] <5B.B4.12181.6C6E5215@epcpsbge7.samsung.com>
@ 2013-02-25 4:42 ` Minkyu Kang
0 siblings, 0 replies; 3+ messages in thread
From: Minkyu Kang @ 2013-02-25 4:42 UTC (permalink / raw)
To: u-boot
Dear Aksahy Saraswat,
On 21/02/13 18:20, Akshay Saraswat wrote:
> Hi Promsoft,
>
>
>
> I have done all the changes suggested by you and pushed new patches except for one.
>
> As suggested to keep only one among tmu.h and exynos_tmu.h is not possible because of the following reasons:
please don't top posting.
>
> 1) There could be many SoC's in future using TMU which need to implement few TMU related functions not specific to any SoC.
> 2) We are using tmu.h to be included in generic files like common/cmd_dtt.c to call such generic functions like tmu_monitor() as discussed above.
> 3) We need one header file to declare exynos specific registers and functions which could not be included in generic files, hence, exynos_tmu.h.
It doesn't make sense.
1. your code is SoC specific.
2. #include <tmu.h> is different from #include <asm/arch/tmu.h>
3. exynos-tmu.h is already in arch-exynos. we don't need exynos prefix.
>
>
> Thanks & Regards,
>
> Akshay Saraswat
>
>
>
> ------- *Original Message* -------
>
> *Sender* : Minkyu Kang<mk7.kang@samsung.com> S4/Engineer/Next Generation Computing Lab./Samsung Electronics
>
> *Date* : Feb 20, 2013 17:36 (GMT+09:00)
>
> *Title* : Re: [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit
>
>
>
> 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
>> Acked-by: Simon Glass
>> ---
>> 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
>> + *
>> + * 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
>> + *
>> + * 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
>> +#include
>> +#include
>> +#include
>> +#include
>> +
>> +#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.
>
Thanks,
Minkyu Kang.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-02-25 4:42 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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[not found] <5B.B4.12181.6C6E5215@epcpsbge7.samsung.com>
2013-02-25 4:42 ` [U-Boot] [PATCH 1/9 v9] EXYNOS5: TMU: Add driver for Thermal Management Unit Minkyu Kang
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
2013-02-20 8:36 ` Minkyu Kang
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