linux-kernel - [PATCH 2/2] therma: exynos: Supports thermal tripping

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Message-id: <000101cdb660$05e7ded0$11b79c70$%choi@samsung.com>
Date:	Tue, 30 Oct 2012 14:32:59 +0900
From:	Jonghwan Choi <jhbird.choi@...sung.com>
To:	'open list' <linux-kernel@...r.kernel.org>
Cc:	'Amit Daniel Kachhap' <amit.kachhap@...aro.org>,
	'Zhang Rui' <rui.zhang@...el.com>,
	'Sachin Kamat' <sachin.kamat@...aro.org>
Subject: [PATCH 2/2] therma: exynos: Supports thermal tripping

TMU urgently sends active-high signal (thermal trip) to PMU,
and thermal tripping by hardware logic i.e PMU is performed.
Thermal tripping means that PMU cut off the whole power of SoC
by controlling external voltage regulator.

Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
---
 drivers/thermal/exynos_thermal.c             |    7 ++++++-
 include/linux/platform_data/exynos_thermal.h |    4 ++++
 2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/thermal/exynos_thermal.c
b/drivers/thermal/exynos_thermal.c
index 6ce6667..edac601 100644
--- a/drivers/thermal/exynos_thermal.c
+++ b/drivers/thermal/exynos_thermal.c
@@ -53,6 +53,7 @@
 #define EXYNOS_TMU_TRIM_TEMP_MASK      0xff
 #define EXYNOS_TMU_GAIN_SHIFT          8
 #define EXYNOS_TMU_REF_VOLTAGE_SHIFT   24
+#define EXYNOS_TMU_TRIP_EN             BIT(12)
 #define EXYNOS_TMU_CORE_ON             1
 #define EXYNOS_TMU_CORE_OFF            0
 #define EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET     50
@@ -656,6 +657,8 @@ static void exynos_tmu_control(struct platform_device
*pdev, bool on)
        if (data->soc == SOC_ARCH_EXYNOS) {
                con |= pdata->noise_cancel_mode <<
EXYNOS_TMU_TRIP_MODE_SHIFT;
                con |= (EXYNOS_MUX_ADDR_VALUE << EXYNOS_MUX_ADDR_SHIFT);
+               if (pdata->trip_en)
+                       con |= EXYNOS_THERMAL_TRIP_EN;
        }

        if (on) {
@@ -762,10 +765,12 @@ static struct exynos_tmu_platform_data const
exynos_default_tmu_data = {
        .trigger_levels[0] = 85,
        .trigger_levels[1] = 103,
        .trigger_levels[2] = 110,
+       .trigger_levels[3] = 120,
        .trigger_level0_en = 1,
        .trigger_level1_en = 1,
        .trigger_level2_en = 1,
-       .trigger_level3_en = 0,
+       .trigger_level3_en = 1,
+       .trip_en = 1,
        .gain = 8,
        .reference_voltage = 16,
        .noise_cancel_mode = 4,
diff --git a/include/linux/platform_data/exynos_thermal.h
b/include/linux/platform_data/exynos_thermal.h
index a7bdb2f..9e44aac 100644
--- a/include/linux/platform_data/exynos_thermal.h
+++ b/include/linux/platform_data/exynos_thermal.h
@@ -79,6 +79,9 @@ struct freq_clip_table {
  * @trigger_level3_en:
  *     1 = enable trigger_level3 interrupt,
  *     0 = disable trigger_level3 interrupt
+ * @trip_en:
+ *     1 = enable thermal tripping
+ *     0 = disable thermal tripping
  * @gain: gain of amplifier in the positive-TC generator block
  *     0 <= gain <= 15
  * @reference_voltage: reference voltage of amplifier
@@ -102,6 +105,7 @@ struct exynos_tmu_platform_data {
        bool trigger_level1_en;
        bool trigger_level2_en;
        bool trigger_level3_en;
+       bool trip_en;

        u8 gain;
        u8 reference_voltage;
--
1.7.4.1

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