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author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2016-02-18 14:14:20 +0900 |
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committer | Eduardo Valentin <edubezval@gmail.com> | 2016-03-08 14:07:32 -0800 |
commit | 3a3a5f15869fa74472c377a556c3d00453403854 (patch) | |
tree | 0a1b427962400e09096bcded13dfcaf4dc6dd9fb /drivers/thermal | |
parent | fa7b29e8bfa288c8473d0c4a3ac120b3a2707e06 (diff) | |
download | linux-stable-3a3a5f15869fa74472c377a556c3d00453403854.tar.gz linux-stable-3a3a5f15869fa74472c377a556c3d00453403854.tar.bz2 linux-stable-3a3a5f15869fa74472c377a556c3d00453403854.zip |
thermal: exynos: Print a message about exceeded number of supported trip-points
When DeviveTree contains more trip-points than SoC can configure
(usually more than four) and polling mode is not enabled, then the
remaining trip-points will be silently ignored. No interrupts will be
generated for them.
This might be quite dangerous when one provides DTB with a
non-configurable critical trip-point, like (assuming four supported
thresholds in TMU):
- alert @50 C (type: active),
- alert @60 C (type: active),
- alert @70 C (type: active),
- alert @80 C (type: active),
- critical @120 C (type: critical) <- no interrupts generated.
This is a mistake in DTB so print a message in such case.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r-- | drivers/thermal/samsung/exynos_tmu.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c index fa61eff88496..6c6f59ba7423 100644 --- a/drivers/thermal/samsung/exynos_tmu.c +++ b/drivers/thermal/samsung/exynos_tmu.c @@ -184,6 +184,7 @@ * @temp_error2: fused value of the second point trim. * @regulator: pointer to the TMU regulator structure. * @reg_conf: pointer to structure to register with core thermal. + * @ntrip: number of supported trip points. * @tmu_initialize: SoC specific TMU initialization method * @tmu_control: SoC specific TMU control method * @tmu_read: SoC specific TMU temperature read method @@ -203,6 +204,7 @@ struct exynos_tmu_data { u16 temp_error1, temp_error2; struct regulator *regulator; struct thermal_zone_device *tzd; + unsigned int ntrip; int (*tmu_initialize)(struct platform_device *pdev); void (*tmu_control)(struct platform_device *pdev, bool on); @@ -346,6 +348,14 @@ static int exynos_tmu_initialize(struct platform_device *pdev) struct exynos_tmu_data *data = platform_get_drvdata(pdev); int ret; + if (of_thermal_get_ntrips(data->tzd) > data->ntrip) { + dev_info(&pdev->dev, + "More trip points than supported by this TMU.\n"); + dev_info(&pdev->dev, + "%d trip points should be configured in polling mode.\n", + (of_thermal_get_ntrips(data->tzd) - data->ntrip)); + } + mutex_lock(&data->lock); clk_enable(data->clk); if (!IS_ERR(data->clk_sec)) @@ -1210,6 +1220,7 @@ static int exynos_map_dt_data(struct platform_device *pdev) data->tmu_control = exynos4210_tmu_control; data->tmu_read = exynos4210_tmu_read; data->tmu_clear_irqs = exynos4210_tmu_clear_irqs; + data->ntrip = 4; break; case SOC_ARCH_EXYNOS3250: case SOC_ARCH_EXYNOS4412: @@ -1222,6 +1233,7 @@ static int exynos_map_dt_data(struct platform_device *pdev) data->tmu_read = exynos4412_tmu_read; data->tmu_set_emulation = exynos4412_tmu_set_emulation; data->tmu_clear_irqs = exynos4210_tmu_clear_irqs; + data->ntrip = 4; break; case SOC_ARCH_EXYNOS5433: data->tmu_initialize = exynos5433_tmu_initialize; @@ -1229,6 +1241,7 @@ static int exynos_map_dt_data(struct platform_device *pdev) data->tmu_read = exynos4412_tmu_read; data->tmu_set_emulation = exynos4412_tmu_set_emulation; data->tmu_clear_irqs = exynos4210_tmu_clear_irqs; + data->ntrip = 8; break; case SOC_ARCH_EXYNOS5440: data->tmu_initialize = exynos5440_tmu_initialize; @@ -1236,6 +1249,7 @@ static int exynos_map_dt_data(struct platform_device *pdev) data->tmu_read = exynos5440_tmu_read; data->tmu_set_emulation = exynos5440_tmu_set_emulation; data->tmu_clear_irqs = exynos5440_tmu_clear_irqs; + data->ntrip = 4; break; case SOC_ARCH_EXYNOS7: data->tmu_initialize = exynos7_tmu_initialize; @@ -1243,6 +1257,7 @@ static int exynos_map_dt_data(struct platform_device *pdev) data->tmu_read = exynos7_tmu_read; data->tmu_set_emulation = exynos4412_tmu_set_emulation; data->tmu_clear_irqs = exynos4210_tmu_clear_irqs; + data->ntrip = 8; break; default: dev_err(&pdev->dev, "Platform not supported\n"); |