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Exynos5: TMU: Add hardware tripping

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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>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Akshay Saraswat 2013-02-25 01:13:06 +00:00 committed by Minkyu Kang
parent 8afcfc2124
commit 3a0b1dae5b
3 changed files with 36 additions and 5 deletions
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12
arch/arm/cpu/armv7/exynos/power.c
View File

@ -128,3 +128,15 @@ void set_xclkout(void)
if (cpu_is_exynos5())
exynos5_set_xclkout();
}
/* Enables hardware tripping to power off the system when TMU fails */
void set_hw_thermal_trip(void)
{
if (cpu_is_exynos5()) {
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
/* PS_HOLD_CONTROL register ENABLE_HW_TRIP bit*/
setbits_le32(&power->ps_hold_control, POWER_ENABLE_HW_TRIP);
}
}

4
arch/arm/include/asm/arch-exynos/power.h
View File

@ -857,6 +857,9 @@ void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable);
void set_usbhost_phy_ctrl(unsigned int enable);
/* Enables hardware tripping to power off the system when TMU fails */
void set_hw_thermal_trip(void);
#define POWER_USB_HOST_PHY_CTRL_EN (1 << 0)
#define POWER_USB_HOST_PHY_CTRL_DISABLE (0 << 0)
@ -865,6 +868,7 @@ void set_dp_phy_ctrl(unsigned int enable);
#define EXYNOS_DP_PHY_ENABLE (1 << 0)
#define EXYNOS_PS_HOLD_CONTROL_DATA_HIGH (1 << 8)
#define POWER_ENABLE_HW_TRIP (1UL << 31)
/*
* Set ps_hold data driving value high

25
drivers/power/exynos-tmu.c
View File

@ -22,9 +22,11 @@
#include <fdtdec.h>
#include <tmu.h>
#include <asm/arch/tmu.h>
#include <asm/arch/power.h>
#define TRIMINFO_RELOAD 1
#define CORE_EN 1
#define THERM_TRIP_EN (1 << 12)
#define INTEN_RISE0 1
#define INTEN_RISE1 (1 << 4)
@ -55,6 +57,8 @@ struct temperature_params {
unsigned int start_warning;
/* temperature threshold CPU tripping */
unsigned int start_tripping;
/* temperature threshold for HW tripping */
unsigned int hardware_tripping;
};
/* Pre-defined values and thresholds for calibration of current temperature */
@ -196,6 +200,9 @@ static int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
info->data.ts.start_tripping = fdtdec_get_int(blob,
node, "samsung,start-tripping", -1);
error |= info->data.ts.start_tripping;
info->data.ts.hardware_tripping = fdtdec_get_int(blob,
node, "samsung,hw-tripping", -1);
error |= info->data.ts.hardware_tripping;
info->data.efuse_min_value = fdtdec_get_int(blob,
node, "samsung,efuse-min-value", -1);
error |= info->data.efuse_min_value;
@ -230,7 +237,7 @@ static int get_tmu_fdt_values(struct tmu_info *info, const void *blob)
static void tmu_setup_parameters(struct tmu_info *info)
{
unsigned int te_code, con;
unsigned int warning_code, trip_code;
unsigned int warning_code, trip_code, hwtrip_code;
unsigned int cooling_temp;
unsigned int rising_value;
struct tmu_data *data = &info->data;
@ -254,9 +261,14 @@ static void tmu_setup_parameters(struct tmu_info *info)
+ info->te1 - info->dc_value;
trip_code = data->ts.start_tripping
+ info->te1 - info->dc_value;
hwtrip_code = data->ts.hardware_tripping
+ info->te1 - info->dc_value;
cooling_temp = 0;
rising_value = ((warning_code << 8) | (trip_code << 16));
rising_value = ((warning_code << 8) |
(trip_code << 16) |
(hwtrip_code << 24));
/* Set interrupt level */
writel(rising_value, &reg->threshold_temp_rise);
@ -276,12 +288,15 @@ static void tmu_setup_parameters(struct tmu_info *info)
/* TMU core enable */
con = readl(&reg->tmu_control);
con |= CORE_EN;
con |= THERM_TRIP_EN | CORE_EN;
writel(con, &reg->tmu_control);
/* LEV0 LEV1 LEV2 interrupt enable */
writel(INTEN_RISE0 | INTEN_RISE1 | INTEN_RISE2, &reg->inten);
/* Enable HW thermal trip */
set_hw_thermal_trip();
/* LEV1 LEV2 interrupt enable */
writel(INTEN_RISE1 | INTEN_RISE2, &reg->inten);
}
/*