thermal: rockchip: Support the RK3228 SoCs in thermal driver

The RK3228 SoCs has one Temperature Sensor, channel 0 is for CPU.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
(cherry picked from git.kernel.org torvalds/linux.git master
 commit 7b02a5e782fa151a610c455ac06e5a998e9cb3f3)
Change-Id: I45def60892a8f5cd6fd18ad064b4bf7c13260b59
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index 89c26444bfe0c5afa062ae53dba78eaa63dc62c3..bcdf73d3d41cafe079c68a731e73902800e32094 100644 (file)
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -154,6 +154,7 @@ struct rockchip_thermal_data {
 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn)         BIT(4 + (chn))
 #define TSADCV2_SHUT_2CRU_SRC_EN(chn)          BIT(8 + (chn))
 
+#define TSADCV1_INT_PD_CLEAR_MASK              ~BIT(16)
 #define TSADCV2_INT_PD_CLEAR_MASK              ~BIT(8)
 
 #define TSADCV2_DATA_MASK                      0xfff
@@ -169,6 +170,51 @@ struct tsadc_table {
        int temp;
 };
 
+/**
+ * Note:
+ * Code to Temperature mapping of the Temperature sensor is a piece wise linear
+ * curve.Any temperature, code faling between to 2 give temperatures can be
+ * linearly interpolated.
+ * Code to Temperature mapping should be updated based on sillcon results.
+ */
+static const struct tsadc_table v1_code_table[] = {
+       {TSADCV3_DATA_MASK, -40000},
+       {436, -40000},
+       {431, -35000},
+       {426, -30000},
+       {421, -25000},
+       {416, -20000},
+       {411, -15000},
+       {406, -10000},
+       {401, -5000},
+       {395, 0},
+       {390, 5000},
+       {385, 10000},
+       {380, 15000},
+       {375, 20000},
+       {370, 25000},
+       {364, 30000},
+       {359, 35000},
+       {354, 40000},
+       {349, 45000},
+       {343, 50000},
+       {338, 55000},
+       {333, 60000},
+       {328, 65000},
+       {322, 70000},
+       {317, 75000},
+       {312, 80000},
+       {307, 85000},
+       {301, 90000},
+       {296, 95000},
+       {291, 100000},
+       {286, 105000},
+       {280, 110000},
+       {275, 115000},
+       {270, 120000},
+       {264, 125000},
+};
+
 static const struct tsadc_table v2_code_table[] = {
        {TSADCV2_DATA_MASK, -40000},
        {3800, -40000},
@@ -369,6 +415,14 @@ static void rk_tsadcv2_initialize(void __iomem *regs,
                       regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 }
 
+static void rk_tsadcv1_irq_ack(void __iomem *regs)
+{
+       u32 val;
+
+       val = readl_relaxed(regs + TSADCV2_INT_PD);
+       writel_relaxed(val & TSADCV1_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
+}
+
 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 {
        u32 val;
@@ -430,6 +484,29 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
        writel_relaxed(val, regs + TSADCV2_INT_EN);
 }
 
+static const struct rockchip_tsadc_chip rk3228_tsadc_data = {
+       .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
+       .chn_num = 1, /* one channel for tsadc */
+
+       .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
+       .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
+       .tshut_temp = 95000,
+
+       .initialize = rk_tsadcv2_initialize,
+       .irq_ack = rk_tsadcv1_irq_ack,
+       .control = rk_tsadcv2_control,
+       .get_temp = rk_tsadcv2_get_temp,
+       .set_tshut_temp = rk_tsadcv2_tshut_temp,
+       .set_tshut_mode = rk_tsadcv2_tshut_mode,
+
+       .table = {
+               .id = v1_code_table,
+               .length = ARRAY_SIZE(v1_code_table),
+               .data_mask = TSADCV3_DATA_MASK,
+               .mode = ADC_DECREMENT,
+       },
+};
+
 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
        .chn_id[SENSOR_CPU] = 1, /* cpu sensor is channel 1 */
        .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */
@@ -479,6 +556,10 @@ static const struct rockchip_tsadc_chip rk3368_tsadc_data = {
 };
 
 static const struct of_device_id of_rockchip_thermal_match[] = {
+       {
+               .compatible = "rockchip,rk3228-tsadc",
+               .data = (void *)&rk3228_tsadc_data,
+       },
        {
                .compatible = "rockchip,rk3288-tsadc",
                .data = (void *)&rk3288_tsadc_data,