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Date: Mon, 24 Jun 2013 16:20:32 +0530
From: Amit Daniel Kachhap <amit.daniel@...sung.com>
To: linux-pm@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
Eduardo Valentin <eduardo.valentin@...com>
Cc: linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
amit.kachhap@...il.com, Kukjin Kim <kgene.kim@...sung.com>
Subject: [PATCH V7 11/30] 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@...sung.com>
Acked-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
Acked-by: Eduardo Valentin <eduardo.valentin@...com>
Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@...sung.com>
---
drivers/thermal/samsung/exynos_tmu.c | 45 +++++++++++++++++++++++++---
drivers/thermal/samsung/exynos_tmu_data.c | 2 +
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)
--
1.7.1
--
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