[RK3568 Android11] RK809开机短按时间设置和长按电源键设置

一、长按电源键

        在产品设计中，为防备系统跑挂了，需要设计通过长按电源键实现硬关机和重启。这里简单介绍RK809实现长按电源键关机和重启功能。

        通过查阅RK809手册PMIC_PWEON_KEY寄存器，可以设置长按电源键PMIC的响应事件有两种：关机和重启。响应时间有6s、8s、10s、12s。

        分析驱动代码rk8xx.c可以发现代码中配好了设备树接口，只需要在设备树中添加相应的属性即可设置长按电源键PMIC的响应时间和响应事件。

//  u-boot/drivers/power/pmic/rk8xx.c
static int rk8xx_ofdata_to_platdata(struct udevice *dev)
{
	struct rk8xx_priv *rk8xx = dev_get_priv(dev);
	u32 interrupt, phandle, val;
	int ret;

	phandle = dev_read_u32_default(dev, "interrupt-parent", -ENODATA);
	if (phandle == -ENODATA) {
		printf("Read 'interrupt-parent' failed, ret=%d\n", phandle);
		return phandle;
	}

	ret = dev_read_u32_array(dev, "interrupts", &interrupt, 1);
	if (ret) {
		printf("Read 'interrupts' failed, ret=%d\n", ret);
		return ret;
	}

	rk8xx->irq = phandle_gpio_to_irq(phandle, interrupt);
	if (rk8xx->irq < 0) {
		printf("Failed to request rk8xx irq, ret=%d\n", rk8xx->irq);
		return rk8xx->irq;
	}

	val = dev_read_u32_default(dev, "long-press-off-time-sec", 0);   //解析long-press-off-time-sec属性
	if (val <= 6)
		rk8xx->lp_off_time = RK8XX_LP_TIME_6S;
	else if (val <= 8)
		rk8xx->lp_off_time = RK8XX_LP_TIME_8S;
	else if (val <= 10)
		rk8xx->lp_off_time = RK8XX_LP_TIME_10S;
	else
		rk8xx->lp_off_time = RK8XX_LP_TIME_12S;

	val = dev_read_u32_default(dev, "long-press-restart", 0);   //解析long-press-restart属性
	if (val)
		rk8xx->lp_action = RK8XX_LP_RESTART;
	else
		rk8xx->lp_action = RK8XX_LP_OFF;

	val = dev_read_u32_default(dev, "not-save-power-en", 0);
	rk8xx->not_save_power_en = val;

	return 0;
}

根据驱动，只需要在dts文件中的rk809节点中添加long-press-off-time-sec和long-press-restart属性。

rk809: pmic@20 {
		compatible = "rockchip,rk809";
		reg = <0x20>;
		...
		long-press-off-time-sec = <6>;  //长按电源键PMIC响应时间，可以设置6s，8s，10s，12s
		long-press-restart = <1>;      //长按电源键PMIC响应事件，0：关机  1：重启

		...

		pwrkey {
			status = "okay";
		};

二、短按开机电源键响应时间

        同样通过RK809手册发现短按电源键开机的响应时间可以设置500ms和100ms。驱动中每发现有设置该功能的接口，可以仿照长按电源键的响应时间来实现短按电源键开机的响应时间。

1）头文件添加寄存器地址

diff --git a/u-boot/include/power/rk8xx_pmic.h b/u-boot/include/power/rk8xx_pmic.h
index aa51e887e4..7274a7dc46 100644
--- a/u-boot/include/power/rk8xx_pmic.h
+++ b/u-boot/include/power/rk8xx_pmic.h
@@ -219,6 +219,9 @@ enum {
 
 #define RK8XX_DEVCTRL_REG      0x4b
 #define RK817_PWRON_KEY                0xf7
+#define RK8XX_ON_TIME       BIT(7)
+#define RK8XX_ON_TIME_500MS (0 << 7)
+#define RK8XX_ON_TIME_100MS (1 << 7)
 #define RK8XX_LP_ACTION_MSK    BIT(6)
 #define RK8XX_LP_OFF           (0 << 6)
 #define RK8XX_LP_RESTART       (1 << 6)
@@ -282,6 +285,7 @@ struct rk8xx_priv {
        struct spi_slave *slave;
        int variant;
        int irq;
+       int on_time_ms;
        int lp_off_time;
        int lp_action;
        uint8_t sleep_pin;

2）代码功能实现

diff --git a/u-boot/drivers/power/pmic/rk8xx.c b/u-boot/drivers/power/pmic/rk8xx.c
index b11695562b..e2e4c66566 100644
--- a/u-boot/drivers/power/pmic/rk8xx.c
+++ b/u-boot/drivers/power/pmic/rk8xx.c
@@ -404,6 +404,12 @@ static int rk8xx_ofdata_to_platdata(struct udevice *dev)
                rk8xx->lp_action = RK8XX_LP_RESTART;
        else
                rk8xx->lp_action = RK8XX_LP_OFF;
+       
+       val = dev_read_u32_default(dev, "press-on-time", 0);
+       if(val)
+               rk8xx->on_time_ms = RK8XX_ON_TIME_100MS;
+       else
+               rk8xx->on_time_ms = RK8XX_ON_TIME_500MS;
 
        val = dev_read_u32_default(dev, "not-save-power-en", 0);
        rk8xx->not_save_power_en = val;
@@ -478,7 +484,7 @@ static int rk8xx_probe(struct udevice *dev)
        int ret = 0, i, show_variant;
        uint8_t msb, lsb, id_msb, id_lsb;
        uint8_t on_source = 0, off_source = 0;
-       uint8_t pwron_key = 0, lp_off_msk = 0, lp_act_msk = 0;
+       uint8_t pwron_key = 0, on_time = 0, lp_off_msk = 0, lp_act_msk = 0;
        uint8_t power_en0, power_en1, power_en2, power_en3;
        uint8_t on, off;
        uint8_t value;
@@ -533,6 +539,7 @@ static int rk8xx_probe(struct udevice *dev)
                on_source = RK817_ON_SOURCE;
                off_source = RK817_OFF_SOURCE;
                pwron_key = RK817_PWRON_KEY;
+               on_time = RK8XX_ON_TIME;
                lp_off_msk = RK8XX_LP_OFF_MSK;
                lp_act_msk = RK8XX_LP_ACTION_MSK;
                init_data = rk817_init_reg;
@@ -601,7 +608,9 @@ static int rk8xx_probe(struct udevice *dev)
                ret = rk8xx_read(dev, pwron_key, &value, 1);
                if (ret)
                        return ret;
-               value &= ~(lp_off_msk | lp_act_msk);
+               value &= ~(on_time | lp_off_msk | lp_act_msk);
+               if (on_time)
+                       value |= priv->on_time_ms;
                if (lp_off_

3）设备树中选择响应时间

diff --git a/kernel/arch/arm64/boot/dts/rockchip/t5.dts b/kernel/arch/arm64/boot/dts/rockchip/t5.dts
index bd32081563..86b6cc9f6a 100755
--- a/kernel/arch/arm64/boot/dts/rockchip/t5.dts
+++ b/kernel/arch/arm64/boot/dts/rockchip/t5.dts
@@ -864,6 +864,7 @@
                pmic-reset-func = <0>;
                /* not save the PMIC_POWER_EN register in uboot */
                not-save-power-en = <1>;
+               press-on-time = <0>;   // 0: 500ms   1: 100ms
                long-press-off-time-sec = <6>;
                long-press-restart = <1>;