[PATCH 3/3] thermal: exynos: Print a message about exceeded number of supported trip-points
From: Krzysztof Kozlowski <hidden>
Date: 2016-02-18 05:14:43
Also in:
linux-arm-kernel, linux-pm, linux-samsung-soc, lkml
Subsystem:
samsung thermal driver, the rest, thermal · Maintainers:
Bartlomiej Zolnierkiewicz, Krzysztof Kozlowski, Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
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. Signed-off-by: Krzysztof Kozlowski <redacted> --- drivers/thermal/samsung/exynos_tmu.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
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");
--
2.5.0