rk3568 电源键强制关机触发时间修改

Rockchip系列主控芯片配套PMIC支持长按电源键强制关闭PMU，也就是标题中的强制关机。rk3568使用I2C通信与PMIC(rk809/rk817)，power(电源)键则是与PMIC相连，PMIC监测按键状态控制RK3568的上下电，实现短按开机、长按强制断电关机。电源键触发rk809/rk817开启供电时间同样可有相关寄存器调整。

作者：炭烤毛蛋，点击博主了解更多。

提示：PMU多个工作状态寄存器，可修改相关参数实现调整强制关机时间，开机触发时间。

文章目录

rk3568 电源键强制关机触发时间修改
1. 核查硬件，适配硬件强制关机
- 1.1 PMIC(rk809、rk817) 电源键设备树注册
- 1.2 PMIC(rk809、rk817) 电源键强制关机触发时间修改
- 1.3 PMIC(rk809、rk817) 屏蔽电源键强制关机
Tips
总结

1. 核查硬件，适配硬件强制关机

RK809、RK817 电源键是直接与 PWRON(pin) 连接，电源键被按下时与GND导通，PWRON 信号被拉低；PMIC检测到该信号变化后触发相关操作。
rk809 电源键

1.1 PMIC(rk809、rk817) 电源键设备树注册

RK809、RK817 的电源键需要在 PMIC驱动中增加相关设备树描述。

&i2c0 {
	status = "okay";

	rk809: pmic@20 {
		pwrkey {
			status = "okay";
		};
	};
};

1.2 PMIC(rk809、rk817) 电源键强制关机触发时间修改

rk817_PWRON_KEY

--- a/arch/arm64/boot/dts/rockchip/rk3568-evb.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3568-evb.dtsi
@@ -1141,6 +1141,10 @@
                /* not save the PMIC_POWER_EN register in uboot */
                not-save-power-en = <1>;
 
+               /* PWRON_LP_OFF_TIME: PWRON long press time:
+               * 6s, 8s, 10s, 12s */
+               pwron-lp-off-time = <10>;
+
                vcc1-supply = <&vcc3v3_sys>;
                vcc2-supply = <&vcc3v3_sys>;
                vcc3-supply = <&vcc3v3_sys>;
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index 8c207a2899d4..f6befe99eb33 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -1126,6 +1126,7 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
        u32 inner;
        int ret, func, msk, val;
        struct device_node *np = dev->of_node;
+       uint32_t value;
 
        ret = of_property_read_u32_index(np, "fb-inner-reg-idxs", 0, &inner);
        if (!ret && inner == RK817_ID_DCDC3)
@@ -1160,6 +1161,25 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
        ret = register_reboot_notifier(&rk817_reboot_data.reboot_notifier);
        if (ret)
                dev_err(dev, "failed to register reboot nb\n");
+
+       ret = device_property_read_u32(dev,
+               "pwron-lp-off-time",
+               &value);
+       if (ret < 0) {
+               dev_info(dev, "pwron-lp-off-time missing!\n");
+       } else {
+               if (value <= 6)
+                       val = RK817_PWRON_LP_OFF_TIME_6S;
+               else if (value <= 8)
+                       val = RK817_PWRON_LP_OFF_TIME_8S;
+               else if (value <= 10)
+                       val = RK817_PWRON_LP_OFF_TIME_10S;
+               else
+                       val = RK817_PWRON_LP_OFF_TIME_12S;
+               regmap_update_bits(rk808->regmap, RK817_PMIC_PWRON_KEY,
+                       RK817_PMIC_PWRON_KEY_MSK,
+                       val);
+       }
 }
 
 static struct kobject *rk8xx_kobj;

1.3 PMIC(rk809、rk817) 屏蔽电源键强制关机

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-evb.dtsi b/arch/arm64/boot/dts/rockchip/rk3568-evb.dtsi
index 1bfaeb681069..7183b00904dc 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-evb.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3568-evb.dtsi
@@ -1141,6 +1141,11 @@
                /* not save the PMIC_POWER_EN register in uboot */
                not-save-power-en = <1>;
 
+               /* PWRON_LP_OFF_TIME: PWRON long press time:
+               * 6s, 8s, 10s, 12s */
+               pwron-lp-off-time = <12>;
+               pwron_lp_act = <0>;
+
                vcc1-supply = <&vcc3v3_sys>;
                vcc2-supply = <&vcc3v3_sys>;
                vcc3-supply = <&vcc3v3_sys>;
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index 8c207a2899d4..844adc944a0a 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -1126,6 +1126,7 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
        u32 inner;
        int ret, func, msk, val;
        struct device_node *np = dev->of_node;
+       uint32_t value;
 
        ret = of_property_read_u32_index(np, "fb-inner-reg-idxs", 0, &inner);
        if (!ret && inner == RK817_ID_DCDC3)
@@ -1160,6 +1161,41 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
        ret = register_reboot_notifier(&rk817_reboot_data.reboot_notifier);
        if (ret)
                dev_err(dev, "failed to register reboot nb\n");
+
+       ret = device_property_read_u32(dev,
+               "pwron_lp_act",
+               &value);
+       if (ret < 0) {
+               dev_info(dev, "pwron-lp-off-time missing!\n");
+       } else {
+               if (value)
+                       regmap_update_bits(rk808->regmap, RK817_PMIC_PWRON_KEY,
+                               RK817_PWRON_LP_ACT_MSK,
+                               RK817_PWRON_LP_ACT_ON);
+               else
+                       regmap_update_bits(rk808->regmap, RK817_PMIC_PWRON_KEY,
+                               RK817_PWRON_LP_ACT_MSK,
+                               RK817_PWRON_LP_ACT_OFF);
+       }
+
+       ret = device_property_read_u32(dev,
+               "pwron-lp-off-time",
+               &value);
+       if (ret < 0) {
+               dev_info(dev, "pwron-lp-off-time missing!\n");
+       } else {
+               if (value <= 6)
+                       val = RK817_PWRON_LP_OFF_TIME_6S;
+               else if (value <= 8)
+                       val = RK817_PWRON_LP_OFF_TIME_8S;
+               else if (value <= 10)
+                       val = RK817_PWRON_LP_OFF_TIME_10S;
+               else
+                       val = RK817_PWRON_LP_OFF_TIME_12S;
+               regmap_update_bits(rk808->regmap, RK817_PMIC_PWRON_KEY,
+                       RK817_PMIC_PWRON_KEY_MSK,
+                       val);
+       }
 }
 
 static struct kobject *rk8xx_kobj;