125 lines
3.4 KiB
Diff
125 lines
3.4 KiB
Diff
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From 8c36d2366775e14171daf1defda791ea1fefe138 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Thu, 16 Sep 2021 16:00:15 +0200
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Subject: [PATCH 290/478] mfd: rk808: Add support for restart via PMIC
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Implemented by pgwipeout.
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See: https://discord.com/channels/463237927984693259/811213663150407691/881541707961876511
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/mfd/rk808.c | 48 +++++++++++++++++++++++++++++++++++++++
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include/linux/mfd/rk808.h | 2 ++
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2 files changed, 50 insertions(+)
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diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
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index b181fe401330..b608264f52d2 100644
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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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@@ -533,6 +534,7 @@ static void rk808_pm_power_off(void)
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int ret;
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unsigned int reg, bit;
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struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
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+ dev_err(&rk808_i2c_client->dev, "poweroff device!\n");
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switch (rk808->variant) {
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case RK805_ID:
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@@ -552,6 +554,7 @@ static void rk808_pm_power_off(void)
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bit = DEV_OFF;
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break;
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default:
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+ dev_err(&rk808_i2c_client->dev, "poweroff device not supported!\n");
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return;
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}
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ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
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@@ -559,6 +562,44 @@ 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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+ int ret;
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+ unsigned int reg, bit;
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+ struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
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+
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+ switch (rk808->variant) {
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+ case RK805_ID:
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+ reg = RK805_DEV_CTRL_REG;
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+ bit = DEV_OFF_RST;
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+ break;
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+ case RK808_ID:
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+ reg = RK808_DEVCTRL_REG,
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+ bit = DEV_OFF;
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+ break;
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+ case RK818_ID:
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+ reg = RK818_DEVCTRL_REG;
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+ bit = DEV_OFF_RST;
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+ break;
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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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+ 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 = 255,
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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 +768,13 @@ static int rk808_probe(struct i2c_client *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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+ rk808->nb = &rk808_restart_handler;
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+
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+ dev_warn(&client->dev, "register restart handler\n");
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+
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+ ret = register_restart_handler(rk808->nb);
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+ if (ret)
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+ dev_err(&client->dev, "failed to register restart handler, %d\n", ret);
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}
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return 0;
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diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h
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index a96e6d43ca06..5dfe0c4ceab1 100644
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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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@@ -701,5 +702,6 @@ struct rk808 {
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long variant;
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const struct regmap_config *regmap_cfg;
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const struct regmap_irq_chip *regmap_irq_chip;
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+ struct notifier_block *nb;
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};
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#endif /* __LINUX_REGULATOR_RK808_H */
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--
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2.35.3
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