diff options
author | Amit Daniel Kachhap <amit.daniel@samsung.com> | 2013-06-24 10:50:32 (GMT) |
---|---|---|
committer | Eduardo Valentin <eduardo.valentin@ti.com> | 2013-08-13 13:52:01 (GMT) |
commit | 7ca04e587ee5d391fecd477f9a3dd725c3e21f23 (patch) | |
tree | 739059dc7730144ffbf2b998ddeab65fc7f33532 /drivers | |
parent | b8d582b9405c75506f4adff9abd4afbe7b698b61 (diff) | |
download | linux-fsl-qoriq-7ca04e587ee5d391fecd477f9a3dd725c3e21f23.tar.xz |
thermal: exynos: Support thermal tripping
TMU urgently sends active-high signal (thermal trip) to PMU, and thermal
tripping by hardware logic. Thermal tripping means that PMU cuts off the
whole power of SoC by controlling external voltage regulator.
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/thermal/samsung/exynos_tmu.c | 45 | ||||
-rw-r--r-- | drivers/thermal/samsung/exynos_tmu_data.c | 2 | ||||
-rw-r--r-- | drivers/thermal/samsung/exynos_tmu_data.h | 2 |
3 files changed, 44 insertions, 5 deletions
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c index 6fd776f..33f494e 100644 --- a/drivers/thermal/samsung/exynos_tmu.c +++ b/drivers/thermal/samsung/exynos_tmu.c @@ -117,7 +117,7 @@ static int exynos_tmu_initialize(struct platform_device *pdev) struct exynos_tmu_data *data = platform_get_drvdata(pdev); struct exynos_tmu_platform_data *pdata = data->pdata; const struct exynos_tmu_registers *reg = pdata->registers; - unsigned int status, trim_info; + unsigned int status, trim_info = 0, con; unsigned int rising_threshold = 0, falling_threshold = 0; int ret = 0, threshold_code, i, trigger_levs = 0; @@ -144,10 +144,26 @@ static int exynos_tmu_initialize(struct platform_device *pdev) (data->temp_error2 != 0)) data->temp_error1 = pdata->efuse_value; - /* Count trigger levels to be enabled */ - for (i = 0; i < MAX_THRESHOLD_LEVS; i++) - if (pdata->trigger_levels[i]) + if (pdata->max_trigger_level > MAX_THRESHOLD_LEVS) { + dev_err(&pdev->dev, "Invalid max trigger level\n"); + goto out; + } + + for (i = 0; i < pdata->max_trigger_level; i++) { + if (!pdata->trigger_levels[i]) + continue; + + if ((pdata->trigger_type[i] == HW_TRIP) && + (!pdata->trigger_levels[pdata->max_trigger_level - 1])) { + dev_err(&pdev->dev, "Invalid hw trigger level\n"); + ret = -EINVAL; + goto out; + } + + /* Count trigger levels except the HW trip*/ + if (!(pdata->trigger_type[i] == HW_TRIP)) trigger_levs++; + } if (data->soc == SOC_ARCH_EXYNOS4210) { /* Write temperature code for threshold */ @@ -165,7 +181,8 @@ static int exynos_tmu_initialize(struct platform_device *pdev) writel(reg->inten_rise_mask, data->base + reg->tmu_intclear); } else if (data->soc == SOC_ARCH_EXYNOS) { /* Write temperature code for rising and falling threshold */ - for (i = 0; i < trigger_levs; i++) { + for (i = 0; + i < trigger_levs && i < EXYNOS_MAX_TRIGGER_PER_REG; i++) { threshold_code = temp_to_code(data, pdata->trigger_levels[i]); if (threshold_code < 0) { @@ -191,6 +208,24 @@ static int exynos_tmu_initialize(struct platform_device *pdev) writel((reg->inten_rise_mask << reg->inten_rise_shift) | (reg->inten_fall_mask << reg->inten_fall_shift), data->base + reg->tmu_intclear); + + /* if last threshold limit is also present */ + i = pdata->max_trigger_level - 1; + if (pdata->trigger_levels[i] && + (pdata->trigger_type[i] == HW_TRIP)) { + threshold_code = temp_to_code(data, + pdata->trigger_levels[i]); + if (threshold_code < 0) { + ret = threshold_code; + goto out; + } + rising_threshold |= threshold_code << 8 * i; + writel(rising_threshold, + data->base + reg->threshold_th0); + con = readl(data->base + reg->tmu_ctrl); + con |= (1 << reg->therm_trip_en_shift); + writel(con, data->base + reg->tmu_ctrl); + } } out: clk_disable(data->clk); diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c index 896aa2a..6cac393 100644 --- a/drivers/thermal/samsung/exynos_tmu_data.c +++ b/drivers/thermal/samsung/exynos_tmu_data.c @@ -123,6 +123,7 @@ struct exynos_tmu_platform_data const exynos5250_default_tmu_data = { .trigger_levels[0] = 85, .trigger_levels[1] = 103, .trigger_levels[2] = 110, + .trigger_levels[3] = 120, .trigger_enable[0] = true, .trigger_enable[1] = true, .trigger_enable[2] = true, @@ -130,6 +131,7 @@ struct exynos_tmu_platform_data const exynos5250_default_tmu_data = { .trigger_type[0] = THROTTLE_ACTIVE, .trigger_type[1] = THROTTLE_ACTIVE, .trigger_type[2] = SW_TRIP, + .trigger_type[3] = HW_TRIP, .max_trigger_level = 4, .gain = 8, .reference_voltage = 16, diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h index 0e2244f..4acf070 100644 --- a/drivers/thermal/samsung/exynos_tmu_data.h +++ b/drivers/thermal/samsung/exynos_tmu_data.h @@ -91,6 +91,8 @@ #define EXYNOS_EMUL_DATA_MASK 0xFF #define EXYNOS_EMUL_ENABLE 0x1 +#define EXYNOS_MAX_TRIGGER_PER_REG 4 + #if defined(CONFIG_CPU_EXYNOS4210) extern struct exynos_tmu_platform_data const exynos4210_default_tmu_data; #define EXYNOS4210_TMU_DRV_DATA (&exynos4210_default_tmu_data) |