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thermal: samsung: Only update available threshold limits

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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>
This commit is contained in:
Tushar Behera 2014-04-14 11:08:15 +05:30 committed by Zhang Rui
parent ced2284339
commit c65d34735a
1 changed files with 4 additions and 0 deletions
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4
drivers/thermal/samsung/exynos_tmu.c
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@ -225,6 +225,8 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
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 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
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 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
}
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);