Hi, Amit
On 2013년 05월 14일 18:58, Amit Daniel Kachhap wrote:
> 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@xxxxxxxxxxx>
> Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
> Signed-off-by: Amit Daniel Kachhap <amit.daniel@xxxxxxxxxxx>
> ---
> 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 5f8f189..479d61e 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -84,6 +84,7 @@
> #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
> @@ -186,7 +187,7 @@ 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;
>
> @@ -251,6 +252,11 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
> falling_threshold |=
> threshold_code << 8 * i;
> }
> + if (pdata->trigger_type[i] != HW_TRIP)
> + continue;
As you know, HW trip can be used when only the most last level of threshold
temperature is set. (exynos4412 : 4th, exynos 5440 : 5th threshold level). So it
wouldn't work properly, even if we enable HW trip according to pre-defined
trigger type not to HW trip threshold temperature. To enable HW trip, we just
need to check whether if HW trip threshold temperature level is defined.
if (trigger_level[HW_TRIP_LEVEL])
enable HW trip
Thanks,
Jonghwa
> + 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,
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