Commit 56f216d8 authored by Peter Geis's avatar Peter Geis Committed by Lee Jones
Browse files

mfd: rk808: Add reboot support to rk808.c 



This adds reboot support to the rk808 pmic driver and enables it for
the rk809 and rk817 devices.
This only enables if the rockchip,system-power-controller flag is set.

Signed-off-by: default avatarPeter Geis <pgwipeout@gmail.com>
Signed-off-by: default avatarFrank Wunderlich <frank-w@public-files.de>
Reviewed-by: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220208194023.929720-1-pgwipeout@gmail.com
parent a96f688b

drivers/mfd/rk808.c

+44 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/regmap.h>

#include <linux/reboot.h>



struct rk808_reg_data {

	int addr;
@@ -543,6 +544,7 @@ static void rk808_pm_power_off(void) 
		reg = RK808_DEVCTRL_REG,

		bit = DEV_OFF_RST;

		break;

	case RK809_ID:

	case RK817_ID:

		reg = RK817_SYS_CFG(3);

		bit = DEV_OFF;
@@ -559,6 +561,34 @@ static void rk808_pm_power_off(void) 
		dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");

}



static int rk808_restart_notify(struct notifier_block *this, unsigned long mode, void *cmd)

{

	struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);

	unsigned int reg, bit;

	int ret;



	switch (rk808->variant) {

	case RK809_ID:

	case RK817_ID:

		reg = RK817_SYS_CFG(3);

		bit = DEV_RST;

		break;



	default:

		return NOTIFY_DONE;

	}

	ret = regmap_update_bits(rk808->regmap, reg, bit, bit);

	if (ret)

		dev_err(&rk808_i2c_client->dev, "Failed to restart device!\n");



	return NOTIFY_DONE;

}



static struct notifier_block rk808_restart_handler = {

	.notifier_call = rk808_restart_notify,

	.priority = 192,

};



static void rk8xx_shutdown(struct i2c_client *client)

{

	struct rk808 *rk808 = i2c_get_clientdata(client);
@@ -727,6 +757,18 @@ static int rk808_probe(struct i2c_client *client, 
	if (of_property_read_bool(np, "rockchip,system-power-controller")) {

		rk808_i2c_client = client;

		pm_power_off = rk808_pm_power_off;



		switch (rk808->variant) {

		case RK809_ID:

		case RK817_ID:

			ret = register_restart_handler(&rk808_restart_handler);

			if (ret)

				dev_warn(&client->dev, "failed to register rst handler, %d\n", ret);

			break;

		default:

			dev_dbg(&client->dev, "pmic controlled board reset not supported\n");

			break;

		}

	}



	return 0;
@@ -749,6 +791,8 @@ static int rk808_remove(struct i2c_client *client) 
	if (pm_power_off == rk808_pm_power_off)

		pm_power_off = NULL;



	unregister_restart_handler(&rk808_restart_handler);



	return 0;

}

include/linux/mfd/rk808.h

+1 −0
Original line number Diff line number Diff line
@@ -373,6 +373,7 @@ enum rk805_reg { 
#define SWITCH2_EN	BIT(6)

#define SWITCH1_EN	BIT(5)

#define DEV_OFF_RST	BIT(3)

#define DEV_RST		BIT(2)

#define DEV_OFF		BIT(0)

#define RTC_STOP	BIT(0)