4.14-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Lezcano daniel.lezcano@linaro.org
commit b424315a287c70eeb5f920f84c92492bd2f5658e upstream.
The TEMP0_CFG configuration register contains different field to set up the temperature controller. However in the code, nothing prevents a setup to overwrite the previous one: eg. writing the hdak value overwrites the sensor selection, the sensor selection overwrites the hdak value.
In order to prevent such thing, use a regmap-like mechanism by reading the value before, set the corresponding bits and write the result.
Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org Signed-off-by: Eduardo Valentin edubezval@gmail.com Signed-off-by: Rafael David Tinoco rafael.tinoco@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/thermal/hisi_thermal.c | 34 +++++++++++++++++++++++++++++----- 1 file changed, 29 insertions(+), 5 deletions(-)
--- a/drivers/thermal/hisi_thermal.c +++ b/drivers/thermal/hisi_thermal.c @@ -30,6 +30,8 @@ #define TEMP0_TH (0x4) #define TEMP0_RST_TH (0x8) #define TEMP0_CFG (0xC) +#define TEMP0_CFG_SS_MSK (0xF000) +#define TEMP0_CFG_HDAK_MSK (0x30) #define TEMP0_EN (0x10) #define TEMP0_INT_EN (0x14) #define TEMP0_INT_CLR (0x18) @@ -132,19 +134,41 @@ static inline void hisi_thermal_enable(v writel(value, addr + TEMP0_EN); }
-static inline void hisi_thermal_sensor_select(void __iomem *addr, int sensor) +static inline int hisi_thermal_get_temperature(void __iomem *addr) { - writel((sensor << 12), addr + TEMP0_CFG); + return hisi_thermal_step_to_temp(readl(addr + TEMP0_VALUE)); }
-static inline int hisi_thermal_get_temperature(void __iomem *addr) +/* + * Temperature configuration register - Sensor selection + * + * Bits [19:12] + * + * 0x0: local sensor (default) + * 0x1: remote sensor 1 (ACPU cluster 1) + * 0x2: remote sensor 2 (ACPU cluster 0) + * 0x3: remote sensor 3 (G3D) + */ +static inline void hisi_thermal_sensor_select(void __iomem *addr, int sensor) { - return hisi_thermal_step_to_temp(readl(addr + TEMP0_VALUE)); + writel((readl(addr + TEMP0_CFG) & ~TEMP0_CFG_SS_MSK) | + (sensor << 12), addr + TEMP0_CFG); }
+/* + * Temperature configuration register - Hdak conversion polling interval + * + * Bits [5:4] + * + * 0x0 : 0.768 ms + * 0x1 : 6.144 ms + * 0x2 : 49.152 ms + * 0x3 : 393.216 ms + */ static inline void hisi_thermal_hdak_set(void __iomem *addr, int value) { - writel(value, addr + TEMP0_CFG); + writel((readl(addr + TEMP0_CFG) & ~TEMP0_CFG_HDAK_MSK) | + (value << 4), addr + TEMP0_CFG); }
static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,