From 1624507bd678318174c1f50d5d20173a96c8ea14 Mon Sep 17 00:00:00 2001
From: Finley Xiao <finley.xiao@rock-chips.com>
Date: Thu, 24 Sep 2020 18:52:02 +0800
Subject: [PATCH] thermal: rockchip: Support RK3568 SoCs in the thermal driver

The RK3568 SoCs have two Temperature Sensors, channel 0 is for CPU,
channel 1 is for GPU.

Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Change-Id: I0dde1dabfbc1bf44ca203cfdea896ca0c05dfadf
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/thermal/rockchip_thermal.c | 103 +++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index 4ec97e8e2025..e1c667e8fe2a 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -247,6 +247,12 @@ struct rockchip_thermal_data {
 
 #define RK1808_BUS_GRF_SOC_CON0			0x0400
 
+#define RK3568_GRF_TSADC_CON			0x0600
+#define RK3568_GRF_TSADC_ANA_REG0		(0x10001 << 0)
+#define RK3568_GRF_TSADC_ANA_REG1		(0x10001 << 1)
+#define RK3568_GRF_TSADC_ANA_REG2		(0x10001 << 2)
+#define RK3568_GRF_TSADC_TSEN			(0x10001 << 8)
+
 #define RV1126_GRF0_TSADC_CON			0x0100
 
 #define RV1126_GRF0_TSADC_TRM			(0xff0077 << 0)
@@ -554,6 +560,45 @@ static const struct tsadc_table rk3399_code_table[] = {
 	{TSADCV3_DATA_MASK, 125000},
 };
 
+static const struct tsadc_table rk3568_code_table[] = {
+	{0, -40000},
+	{1584, -40000},
+	{1620, -35000},
+	{1652, -30000},
+	{1688, -25000},
+	{1720, -20000},
+	{1756, -15000},
+	{1788, -10000},
+	{1824, -5000},
+	{1856, 0},
+	{1892, 5000},
+	{1924, 10000},
+	{1956, 15000},
+	{1992, 20000},
+	{2024, 25000},
+	{2060, 30000},
+	{2092, 35000},
+	{2128, 40000},
+	{2160, 45000},
+	{2196, 50000},
+	{2228, 55000},
+	{2264, 60000},
+	{2300, 65000},
+	{2332, 70000},
+	{2368, 75000},
+	{2400, 80000},
+	{2436, 85000},
+	{2468, 90000},
+	{2500, 95000},
+	{2536, 100000},
+	{2572, 105000},
+	{2604, 110000},
+	{2636, 115000},
+	{2672, 120000},
+	{2704, 125000},
+	{TSADCV2_DATA_MASK, 125000},
+};
+
 static u32 rk_tsadcv2_temp_to_code(const struct chip_tsadc_table *table,
 				   int temp)
 {
@@ -826,6 +871,35 @@ static void rk_tsadcv6_initialize(struct regmap *grf, void __iomem *regs,
 			     RV1126_GRF0_TSADC_TRM);
 }
 
+static void rk_tsadcv7_initialize(struct regmap *grf, void __iomem *regs,
+				  enum tshut_polarity tshut_polarity)
+{
+	writel_relaxed(TSADCV5_USER_INTER_PD_SOC, regs + TSADCV2_USER_CON);
+	writel_relaxed(TSADCV5_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
+	writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
+		       regs + TSADCV2_HIGHT_INT_DEBOUNCE);
+	writel_relaxed(TSADCV5_AUTO_PERIOD_HT_TIME,
+		       regs + TSADCV2_AUTO_PERIOD_HT);
+	writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
+		       regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
+
+	if (tshut_polarity == TSHUT_HIGH_ACTIVE)
+		writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
+			       regs + TSADCV2_AUTO_CON);
+	else
+		writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
+			       regs + TSADCV2_AUTO_CON);
+
+	if (!IS_ERR(grf)) {
+		regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_TSEN);
+		udelay(15);
+		regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_ANA_REG0);
+		regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_ANA_REG1);
+		regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_ANA_REG2);
+		usleep_range(100, 200);
+	}
+}
+
 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 {
 	u32 val;
@@ -1248,6 +1322,31 @@ static const struct rockchip_tsadc_chip rk3399_tsadc_data = {
 	},
 };
 
+static const struct rockchip_tsadc_chip rk3568_tsadc_data = {
+	.chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
+	.chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
+	.chn_num = 2, /* two channels for tsadc */
+
+	.tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
+	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
+	.tshut_temp = 95000,
+
+	.initialize = rk_tsadcv7_initialize,
+	.irq_ack = rk_tsadcv3_irq_ack,
+	.control = rk_tsadcv3_control,
+	.get_temp = rk_tsadcv2_get_temp,
+	.set_alarm_temp = rk_tsadcv2_alarm_temp,
+	.set_tshut_temp = rk_tsadcv2_tshut_temp,
+	.set_tshut_mode = rk_tsadcv2_tshut_mode,
+
+	.table = {
+		.id = rk3568_code_table,
+		.length = ARRAY_SIZE(rk3568_code_table),
+		.data_mask = TSADCV2_DATA_MASK,
+		.mode = ADC_INCREMENT,
+	},
+};
+
 static const struct of_device_id of_rockchip_thermal_match[] = {
 	{	.compatible = "rockchip,px30-tsadc",
 		.data = (void *)&px30_tsadc_data,
@@ -1288,6 +1387,10 @@ static const struct of_device_id of_rockchip_thermal_match[] = {
 		.compatible = "rockchip,rk3399-tsadc",
 		.data = (void *)&rk3399_tsadc_data,
 	},
+	{
+		.compatible = "rockchip,rk3568-tsadc",
+		.data = (void *)&rk3568_tsadc_data,
+	},
 	{ /* end */ },
 };
 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);