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authorTushar Behera <tushar.behera@linaro.org>2014-04-14 11:08:15 +0530
committerZhang Rui <rui.zhang@intel.com>2014-05-15 16:44:16 +0800
commitc65d34735a2a31d3b015804706037f8cb0726950 (patch)
treee788ac235c084abca31e9b3e4be5d640c1124b7e /drivers/thermal
parentced2284339580b50b997807d02ccee19692b72b3 (diff)
downloadlinux-c65d34735a2a31d3b015804706037f8cb0726950.tar.bz2
thermal: samsung: Only update available threshold limits
Currently the threshold limits are updated in 2 stages, once for all software trigger levels and again for hardware trip point. While updating the software trigger levels, it overwrites the threshold limit for hardware trip point thereby forcing the Exynos core to issue an emergency shutdown. Updating only the required fields in threshold register fixes this issue. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Acked-by: Amit Daniel Kachhap <amit.daniel@samsung.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/samsung/exynos_tmu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 0d96a510389f..ffccc894f0f8 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -225,6 +225,8 @@ skip_calib_data:
trigger_levs++;
}
+ rising_threshold = readl(data->base + reg->threshold_th0);
+
if (data->soc == SOC_ARCH_EXYNOS4210) {
/* Write temperature code for threshold */
threshold_code = temp_to_code(data, pdata->threshold);
@@ -249,6 +251,7 @@ skip_calib_data:
ret = threshold_code;
goto out;
}
+ rising_threshold &= ~(0xff << 8 * i);
rising_threshold |= threshold_code << 8 * i;
if (pdata->threshold_falling) {
threshold_code = temp_to_code(data,
@@ -281,6 +284,7 @@ skip_calib_data:
}
if (i == EXYNOS_MAX_TRIGGER_PER_REG - 1) {
/* 1-4 level to be assigned in th0 reg */
+ rising_threshold &= ~(0xff << 8 * i);
rising_threshold |= threshold_code << 8 * i;
writel(rising_threshold,
data->base + reg->threshold_th0);