75 lines
2.1 KiB
Diff
75 lines
2.1 KiB
Diff
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Patches act8846 regulator providing the proper reset handle and exploit
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the SIPC bit in GLB_POWER_OFF register. Mainly used to reset some rockchip
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boards.
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Origin: <https://patchwork.kernel.org/patch/6409521/>
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diff --git a/drivers/regulator/act8865-regulator.c b/drivers/regulator/act8865-regulator.c
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index 2ff73d7..836d10b 100644
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--- a/drivers/regulator/act8865-regulator.c
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+++ b/drivers/regulator/act8865-regulator.c
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@@ -27,6 +27,7 @@
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#include <linux/regulator/of_regulator.h>
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#include <linux/regmap.h>
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#include <dt-bindings/regulator/active-semi,8865-regulator.h>
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+#include <linux/reboot.h>
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/*
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* ACT8600 Global Register Map.
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@@ -133,6 +134,8 @@
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#define ACT8865_VOLTAGE_NUM 64
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#define ACT8600_SUDCDC_VOLTAGE_NUM 255
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+#define ACT8846_SIPC_MASK 0x01
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+
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struct act8865 {
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struct regmap *regmap;
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int off_reg;
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@@ -402,6 +405,22 @@ static void act8865_power_off(void)
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while (1);
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}
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+static int act8846_power_cycle(struct notifier_block *this,
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+ unsigned long code, void *unused)
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+{
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+ struct act8865 *act8846;
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+
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+ act8846 = i2c_get_clientdata(act8865_i2c_client);
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+ regmap_write(act8846->regmap, ACT8846_GLB_OFF_CTRL, ACT8846_SIPC_MASK);
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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 act8846_restart_handler = {
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+ .notifier_call = act8846_power_cycle,
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+ .priority = 129,
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+};
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+
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static int act8865_pmic_probe(struct i2c_client *client,
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const struct i2c_device_id *i2c_id)
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{
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@@ -484,6 +503,8 @@ static int act8865_pmic_probe(struct i2c_client *client,
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}
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if (of_device_is_system_power_controller(dev->of_node)) {
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+ int ret;
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+
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if (!pm_power_off && (off_reg > 0)) {
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act8865_i2c_client = client;
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act8865->off_reg = off_reg;
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@@ -492,6 +513,14 @@ static int act8865_pmic_probe(struct i2c_client *client,
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} else {
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dev_err(dev, "Failed to set poweroff capability, already defined\n");
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}
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+
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+ if (type == ACT8846) {
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+ act8865_i2c_client = client;
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+ ret = register_restart_handler(&act8846_restart_handler);
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+ if (ret)
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+ pr_err("%s: cannot register restart handler, %d\n",
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+ __func__, ret);
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+ }
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}
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/* Finally register devices */
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