From: Akshay Saraswat akshay.s@samsung.com

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

diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi index fa4d498..db22db6 100644 --- a/arch/arm/dts/exynos5250.dtsi +++ b/arch/arm/dts/exynos5250.dtsi @@ -28,4 +28,9 @@ #address-cells = <1>; #size-cells = <0>; }; + + tmu@10060000 { + compatible = "samsung,exynos-tmu"; + reg = <0x10060000 0xffff>; + }; }; diff --git a/board/samsung/dts/exynos5250-smdk5250.dts b/board/samsung/dts/exynos5250-smdk5250.dts index b6fbb67..2d3ecca 100644 --- a/board/samsung/dts/exynos5250-smdk5250.dts +++ b/board/samsung/dts/exynos5250-smdk5250.dts @@ -26,4 +26,17 @@ phy-mode = "mii"; }; }; + + tmu@10060000 { + samsung,mux = <6>; + 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 = <268470274>; + 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..99e7164 --- /dev/null +++ b/doc/device-tree-bindings/exynos/tmu.txt @@ -0,0 +1,35 @@ +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 +Practic : Universal Serial Bus" with the following modifications +and additions: + +Required properties : + - compatible : Should be "samsung,exynos-tmu" for TMU + - samsung,mux : mux Address for the TMU to enable TMU core: + - samsung,min-temp : Minimum temperature, default is 25: + - samsung,max-temp : Maximum temperature, defalut set to 125: + - samsung,start-warning : temp at which TMU start giving warning: + - samsung,start-tripping : temp at which system will trip and shutdown: + - samsung,efuse-min-value : SOC efuse min value: + - samsung,efuse-value : SOC actual efuse value: + - samsung,efuse-max-value : SoC max efuse value: + - samsung,slope : Gain of amplifier, default is 268470274: + - samsung,dc-value : DC value of TMU, default is 25: + +Example: + +tmu@10060000 { + compatible = "samsung,exynos-tmu" + samsung,mux = <6>; + 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 = <268470274>; + samsung,dc-value = <25>; +}; diff --git a/include/fdtdec.h b/include/fdtdec.h index 8f79f8a..180dfff 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -68,6 +68,7 @@ enum fdt_compat_id { COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */ COMPAT_SMSC_LAN9215, /* SMSC 10/100 Ethernet LAN9215 */ COMPAT_SAMSUNG_EXYNOS5_SROMC, /* Exynos5 SROMC */ + COMPAT_SAMSUNG_EXYNOS_TMU, /* Exynos TMU */

COMPAT_COUNT, }; diff --git a/lib/fdtdec.c b/lib/fdtdec.c index d8103fd..8e5ed21 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -45,6 +45,7 @@ static const char * const compat_names[COMPAT_COUNT] = { COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), COMPAT(SMSC_LAN9215, "smsc,lan9215"), COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), + COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), };

const char *fdtdec_get_compatible(enum fdt_compat_id id)

From: Akshay Saraswat akshay.s@samsung.com

Adding Exynos Thermal Management Unit driver to monitor SOC temperature and take actions corresponding to states of TMU. System will shutdown if tripping temperature is reached.

Signed-off-by: Akshay Saraswat akshay.s@samsung.com

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..ad9e394 --- /dev/null +++ b/arch/arm/include/asm/arch-exynos/exynos-tmu.h @@ -0,0 +1,82 @@ +/* + * 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_THERMAL_H +#define __ASM_ARCH_THERMAL_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; +}; + +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 diff --git a/drivers/power/Makefile b/drivers/power/Makefile index 6bf388c..192a7cb 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -30,6 +30,7 @@ COBJS-$(CONFIG_TPS6586X_POWER) += tps6586x.o COBJS-$(CONFIG_TWL4030_POWER) += twl4030.o COBJS-$(CONFIG_TWL6030_POWER) += twl6030.o COBJS-$(CONFIG_TWL6035_POWER) += twl6035.o +COBJS-$(CONFIG_EXYNOS_TMU) += exynos-tmu.o

COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/power/exynos-tmu.c b/drivers/power/exynos-tmu.c new file mode 100644 index 0000000..ee596d5 --- /dev/null +++ b/drivers/power/exynos-tmu.c @@ -0,0 +1,296 @@ +/* + * 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 <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; + /* mux Address for the TMU */ + int tmu_mux; + /* 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; + /* TMU DC value for threshold calculation */ + 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; + +/* + * After reading temperature code from register, compensating + * its value and calculating celsius temperatue, + * get current temperatue. + * + * @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 */ + cur_temp = readl(&reg->current_temp) & 0xff; + + /* Calibrate current temperature */ + if (cur_temp) + 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 -1; + + 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 -1; + } + return 0; +} + +/* + * 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->tmu_mux = fdtdec_get_int(blob, + node, "samsung,mux", -1); + error |= info->tmu_mux; + 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_temp, con; + unsigned int warning_temp, trip_temp; + 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 using efuse value at EXYNOS */ + writel(TRIMINFO_RELOAD, &reg->triminfo_control); + + /* Get the compensation parameter */ + te_temp = readl(&reg->triminfo); + info->te1 = te_temp & TRIM_INFO_MASK; + info->te2 = ((te_temp >> 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_temp = data->ts.start_warning + + info->te1 - info->dc_value; + trip_temp = data->ts.start_tripping + + info->te1 - info->dc_value; + cooling_temp = 0; + + rising_value = ((warning_temp << 8) | (trip_temp << 16)); + + /* Set interrupt level */ + writel(rising_value, &reg->threshold_temp_rise); + writel(cooling_temp, &reg->threshold_temp_fall); + + /* + * Need to init all regsiter setting after getting parameter info + * [28:23] vref [11:8] slope - Tunning parameter + */ + writel(data->slope, &reg->tmu_control); + + writel(INTCLEARALL, &reg->intclear); + /* TMU core enable */ + con = readl(&reg->tmu_control); + con |= (info->tmu_mux << 20) | CORE_EN; + + writel(con, &reg->tmu_control); + + /* LEV0 LEV1 LEV2 interrupt enable */ + writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2, &reg->inten); +} + +/* + * Initialize TMU device + * + * @param blob FDT blob + * @return int value, 0 for success + */ +int tmu_init(const void *blob) +{ + gbl_info.tmu_state = TMU_STATUS_INIT; + if (get_tmu_fdt_values(&gbl_info, blob) < 0) + return -1; + + tmu_setup_parameters(&gbl_info); + gbl_info.tmu_state = TMU_STATUS_NORMAL; + + return 0; +}

From: Akshay Saraswat akshay.s@samsung.com

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

diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c index d4bce6d..a6d8827 100644 --- a/arch/arm/cpu/armv7/exynos/power.c +++ b/arch/arm/cpu/armv7/exynos/power.c @@ -95,3 +95,14 @@ void set_dp_phy_ctrl(unsigned int enable) if (cpu_is_exynos5()) exynos5_dp_phy_control(enable); } + +/* This function never returns */ +void power_shutdown(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..7d798ba 100644 --- a/arch/arm/include/asm/arch-exynos/power.h +++ b/arch/arm/include/asm/arch-exynos/power.h @@ -863,5 +863,9 @@ 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) + +/* This function never returns */ +void power_shutdown(void);

#endif

From: Akshay Saraswat akshay.s@samsung.com

Add a generic polling function to continuously monitor events and trigger actions corresponding to them.

Signed-off-by: Akshay Saraswat akshay.s@samsung.com

diff --git a/README b/README index 2572add..72b3b67 100644 --- a/README +++ b/README @@ -2814,6 +2814,13 @@ Configuration Settings: the application (usually a Linux kernel) when it is booted

+- CONFIG_BOARD_POLL + There are various scenarios in which parallel-thread like + polling is required to monitor status of variety of devices. + For such situations CONFIG_BOARD_POLL shall be enabled + and funtion call board_poll_devices() from console_tstc() + will then poll for the device status as defined inside function. + - CONFIG_SYS_BAUDRATE_TABLE: List of legal baudrate settings for this board.

diff --git a/common/console.c b/common/console.c index 1177f7d..d320b9b 100644 --- a/common/console.c +++ b/common/console.c @@ -117,6 +117,11 @@ static int console_tstc(int file) int i, ret; struct stdio_dev *dev;

+#if defined CONFIG_BOARD_POLL + /* Generic polling function */ + board_poll_devices(); +#endif + disable_ctrlc(1); for (i = 0; i < cd_count[file]; i++) { dev = console_devices[file][i]; diff --git a/include/common.h b/include/common.h index b23e90b..cba2e3b 100644 --- a/include/common.h +++ b/include/common.h @@ -782,6 +782,14 @@ void clear_ctrlc (void); /* clear the Control-C condition */ int disable_ctrlc (int); /* 1 to disable, 0 to enable Control-C detect */

/* + * A generic polling function + * This will be called to poll for some events, + * In this case this will be called form console_tstc() to monitor + * temperatur of the SOC + */ +void board_poll_devices(void); + +/* * STDIO based functions (can always be used) */ /* serial stuff */

From: Akshay Saraswat akshay.s@samsung.com

This adds call to tmu_init() and TMU status polling in board_poll_devices() funtion to monitor temperature change of the SOC.

Signed-off-by: Akshay Saraswat akshay.s@samsung.com

diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c index ac7346d..19eb2e0 100644 --- a/board/samsung/smdk5250/smdk5250.c +++ b/board/samsung/smdk5250/smdk5250.c @@ -32,15 +32,51 @@ #include <asm/arch/pinmux.h> #include <asm/arch/sromc.h> #include <pmic.h> +#include <asm/arch/exynos-tmu.h> +#include <asm/arch/power.h>

DECLARE_GLOBAL_DATA_PTR;

+/* + * Polling various devices on board for details and status monitoring purposes + */ +void board_poll_devices(void) +{ +#if defined CONFIG_EXYNOS_TMU + int temp; + + switch (tmu_monitor(&temp)) { + case TMU_STATUS_TRIPPED: + puts("EXYNOS_TMU: TRIPPING! Device power going down ...\n"); + power_shutdown(); + break; + case TMU_STATUS_WARNING: + puts("EXYNOS_TMU: WARNING! Temperature very high\n"); + break; + case TMU_STATUS_INIT: + case TMU_STATUS_NORMAL: + debug("syetm is in normal temperature state\n"); + break; + default: + debug("Unknown TMU state\n"); + } +#endif +} + int board_init(void) { gd->bd->bi_boot_params = (PHYS_SDRAM_1 + 0x100UL); #if defined(CONFIG_PMIC) pmic_init(); #endif + +#if defined CONFIG_EXYNOS_TMU + if (tmu_init(gd->fdt_blob)) { + debug("%s: Failed to init TMU\n", __func__); + return -1; + } +#endif + #ifdef CONFIG_EXYNOS_SPI spi_init(); #endif

Enables TMU driver support for exynos5250

Signed-off-by: Akshay Saraswat akshay.s@samsung.com

diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h index 12f555c..2f4315a 100644 --- a/include/configs/exynos5250-dt.h +++ b/include/configs/exynos5250-dt.h @@ -106,6 +106,12 @@ #define CONFIG_BOOTDELAY 3 #define CONFIG_ZERO_BOOTDELAY_CHECK

+/* Generic Device Polling */ +#define CONFIG_BOARD_POLL + +/* Thermal Management Unit */ +#define CONFIG_EXYNOS_TMU + /* USB */ #define CONFIG_CMD_USB #define CONFIG_USB_EHCI

From: Alim Akhtar alim.akhtar@samsung.com

Adds a new u-boot command to read current temprature from tmu driver.

Signed-off-by: Alim Akhtar alim.akhtar@samsung.com

diff --git a/common/Makefile b/common/Makefile index dca2f53..b56ffa2 100644 --- a/common/Makefile +++ b/common/Makefile @@ -159,6 +159,7 @@ COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o COBJS-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o COBJS-$(CONFIG_CMD_TIME) += cmd_time.o COBJS-$(CONFIG_SYS_HUSH_PARSER) += cmd_test.o +COBJS-$(CONFIG_CMD_TMU) += cmd_tmu.o COBJS-$(CONFIG_CMD_TPM) += cmd_tpm.o COBJS-$(CONFIG_CMD_TSI148) += cmd_tsi148.o COBJS-$(CONFIG_CMD_UBI) += cmd_ubi.o diff --git a/common/cmd_tmu.c b/common/cmd_tmu.c new file mode 100644 index 0000000..db0a714 --- /dev/null +++ b/common/cmd_tmu.c @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * Alim Akhtar alim.akhtar@samsung.com + * + * 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 as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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 <command.h> +#include <asm/arch/exynos-tmu.h> + +int do_tmu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + int cur_temp; + + if (argc < 2) + return CMD_RET_USAGE; + + if (strcmp(argv[1], "curtemp") == 0) { + if (tmu_monitor(&cur_temp) == -1) + printf("tmu is in unknow state, temp is invalid\n"); + else + printf("Current Temp: %u degrees Celsius\n", cur_temp); + } else { + return CMD_RET_USAGE; + } + + return 0; +} + +U_BOOT_CMD( + tmu, 2, 1, do_tmu, + "Thermal Management Unit\n", + "curtemp - show current cpu temperature in degrees celsius\n" +);

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

Signed-off-by: Alim Akhtar alim.akhtar@samsung.com

diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h index 2f4315a..2b9271c 100644 --- a/include/configs/exynos5250-dt.h +++ b/include/configs/exynos5250-dt.h @@ -111,6 +111,7 @@

/* Thermal Management Unit */ #define CONFIG_EXYNOS_TMU +#define CONFIG_CMD_TMU

/* USB */ #define CONFIG_CMD_USB