mirror of
https://github.com/Ysurac/openmptcprouter.git
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110 lines
3 KiB
Diff
110 lines
3 KiB
Diff
From 56f216d8efbc1212bf5ff8a6ff5e29927965e8db Mon Sep 17 00:00:00 2001
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From: Peter Geis <pgwipeout@gmail.com>
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Date: Tue, 8 Feb 2022 14:40:23 -0500
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Subject: [PATCH] mfd: rk808: Add reboot support to rk808.c
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This adds reboot support to the rk808 pmic driver and enables it for
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the rk809 and rk817 devices.
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This only enables if the rockchip,system-power-controller flag is set.
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Signed-off-by: Peter Geis <pgwipeout@gmail.com>
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Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
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Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
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Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Link: https://lore.kernel.org/r/20220208194023.929720-1-pgwipeout@gmail.com
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---
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drivers/mfd/rk808.c | 44 +++++++++++++++++++++++++++++++++++++++
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include/linux/mfd/rk808.h | 1 +
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2 files changed, 45 insertions(+)
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--- a/drivers/mfd/rk808.c
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+++ b/drivers/mfd/rk808.c
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@@ -19,6 +19,7 @@
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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+#include <linux/reboot.h>
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struct rk808_reg_data {
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int addr;
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@@ -543,6 +544,7 @@ static void rk808_pm_power_off(void)
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reg = RK808_DEVCTRL_REG,
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bit = DEV_OFF_RST;
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break;
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+ case RK809_ID:
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case RK817_ID:
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reg = RK817_SYS_CFG(3);
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bit = DEV_OFF;
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@@ -559,6 +561,34 @@ static void rk808_pm_power_off(void)
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dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
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}
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+static int rk808_restart_notify(struct notifier_block *this, unsigned long mode, void *cmd)
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+{
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+ struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
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+ unsigned int reg, bit;
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+ int ret;
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+
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+ switch (rk808->variant) {
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+ case RK809_ID:
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+ case RK817_ID:
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+ reg = RK817_SYS_CFG(3);
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+ bit = DEV_RST;
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+ break;
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+
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+ default:
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+ return NOTIFY_DONE;
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+ }
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+ ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
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+ if (ret)
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+ dev_err(&rk808_i2c_client->dev, "Failed to restart device!\n");
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+
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+ return NOTIFY_DONE;
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+}
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+
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+static struct notifier_block rk808_restart_handler = {
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+ .notifier_call = rk808_restart_notify,
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+ .priority = 192,
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+};
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+
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static void rk8xx_shutdown(struct i2c_client *client)
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{
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struct rk808 *rk808 = i2c_get_clientdata(client);
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@@ -727,6 +757,18 @@ static int rk808_probe(struct i2c_client
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if (of_property_read_bool(np, "rockchip,system-power-controller")) {
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rk808_i2c_client = client;
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pm_power_off = rk808_pm_power_off;
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+
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+ switch (rk808->variant) {
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+ case RK809_ID:
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+ case RK817_ID:
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+ ret = register_restart_handler(&rk808_restart_handler);
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+ if (ret)
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+ dev_warn(&client->dev, "failed to register rst handler, %d\n", ret);
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+ break;
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+ default:
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+ dev_dbg(&client->dev, "pmic controlled board reset not supported\n");
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+ break;
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+ }
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}
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return 0;
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@@ -749,6 +791,8 @@ static int rk808_remove(struct i2c_clien
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if (pm_power_off == rk808_pm_power_off)
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pm_power_off = NULL;
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+ unregister_restart_handler(&rk808_restart_handler);
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+
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return 0;
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}
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--- a/include/linux/mfd/rk808.h
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+++ b/include/linux/mfd/rk808.h
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@@ -373,6 +373,7 @@ enum rk805_reg {
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#define SWITCH2_EN BIT(6)
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#define SWITCH1_EN BIT(5)
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#define DEV_OFF_RST BIT(3)
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+#define DEV_RST BIT(2)
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#define DEV_OFF BIT(0)
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#define RTC_STOP BIT(0)
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