[PATCH V2 08/20] thermal: exynos: Support thermal tripping

Amit Daniel Kachhap
2013-04-26T10:38:51Z

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>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
---
drivers/thermal/samsung/exynos_tmu.c | 8 +++++++-
drivers/thermal/samsung/exynos_tmu_data.c | 2 ++
2 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 77b6a37..23baeeb 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -88,6 +88,7 @@
#define EXYNOS_TMU_CLEAR_FALL_INT (0x111 << 12)
#define EXYNOS_TMU_TRIP_MODE_SHIFT 13
#define EXYNOS_TMU_TRIP_MODE_MASK 0x7
+#define EXYNOS_TMU_THERM_TRIP_EN_SHIFT 12

#define EXYNOS_TMU_INTEN_RISE0_SHIFT 0
#define EXYNOS_TMU_INTEN_RISE1_SHIFT 4
@@ -190,7 +191,7 @@ 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;
- unsigned int status, trim_info;
+ unsigned int status, trim_info, con;
unsigned int rising_threshold = 0, falling_threshold = 0;
int ret = 0, threshold_code, i, trigger_levs = 0;

@@ -255,6 +256,11 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
falling_threshold |=
threshold_code << 8 * i;
}
+ if (pdata->trigger_type[i] != HW_TRIP)
+ continue;
+ con = readl(data->base + EXYNOS_TMU_REG_CONTROL);
+ con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
+ writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
}

writel(rising_threshold,
diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
index ee6a3c9..6b937f5 100644
--- a/drivers/thermal/samsung/exynos_tmu_data.c
+++ b/drivers/thermal/samsung/exynos_tmu_data.c
@@ -64,6 +64,7 @@ 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] = 1,
.trigger_enable[1] = 1,
.trigger_enable[2] = 1,
@@ -71,6 +72,7 @@ struct exynos_tmu_platform_data const exynos5250_default_tmu_data = {
.trigger_type[0] = 0,
.trigger_type[1] = 0,
.trigger_type[2] = 1,
+ .trigger_type[3] = 2,
.gain = 8,
.reference_voltage = 16,
.noise_cancel_mode = 4,
--
1.7.1