linux-kernel - [PATCH v3 2/2] therma: exynos: Supports thermal tripping

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 20 Nov 2012 09:57:35 +0900
From:	Jonghwan Choi <jhbird.choi@...sung.com>
To:	'Jonghwan Choi' <jhbird.choi@...sung.com>,
	'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 v3 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 |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/thermal/exynos_thermal.c
b/drivers/thermal/exynos_thermal.c
index 129e827..569478d 100644
--- a/drivers/thermal/exynos_thermal.c
+++ b/drivers/thermal/exynos_thermal.c
@@ -58,6 +58,7 @@
 #define EXYNOS_TMU_CORE_ON             BIT(0)
 #define EXYNOS_TMU_CORE_ON_SHIFT       0
 #define EXYNOS_TMU_CORE_ON_MASK                (0x1 <<
EXYNOS_TMU_CORE_ON_SHIFT)
+#define EXYNOS_TMU_TRIP_EN             BIT(12)
 #define EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET     50

 /* Exynos4210 specific registers */
@@ -631,6 +632,12 @@ static int exynos_tmu_initialize(struct platform_device
*pdev)
                        goto out;
                }
                rising_threshold |= (threshold_code << 16);
+               threshold_code = temp_to_code(data,
pdata->trigger_levels[3]);
+               if (threshold_code < 0) {
+                       ret = threshold_code;
+                       goto out;
+               }
+               rising_threshold |= (threshold_code << 24);

                writel(rising_threshold,
                                data->base + EXYNOS_THD_TEMP_RISE);
@@ -665,6 +672,8 @@ static void exynos_tmu_control(struct platform_device
*pdev, bool on)
                con &= ~(EXYNOS_TMU_TRIP_MODE_MASK | EXYNOS_MUX_ADDR_MASK);
                con |= pdata->noise_cancel_mode <<
EXYNOS_TMU_TRIP_MODE_SHIFT;
                con |= (EXYNOS_MUX_ADDR_VALUE << EXYNOS_MUX_ADDR_SHIFT);
+               if (pdata->trigger_levels[3])
+                       con |= EXYNOS_TMU_TRIP_EN;
        }

        if (on) {
@@ -770,6 +779,7 @@ 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,
--
1.7.4.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/