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| author | Peter Geis <pgwipeout@gmail.com> | 2022-02-08 14:40:23 -0500 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2022-03-08 09:44:05 +0000 |
| commit | 56f216d8efbc1212bf5ff8a6ff5e29927965e8db (patch) | |
| tree | 24344efe99670eb5dd9bfd0ba079243a30f3ce09 /drivers/mfd | |
| parent | a96f688b4e4466da39385368f47fc02a0409a367 (diff) | |
| download | linux-rpi-56f216d8efbc1212bf5ff8a6ff5e29927965e8db.tar.gz linux-rpi-56f216d8efbc1212bf5ff8a6ff5e29927965e8db.tar.bz2 linux-rpi-56f216d8efbc1212bf5ff8a6ff5e29927965e8db.zip | |
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: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220208194023.929720-1-pgwipeout@gmail.com
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/rk808.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c index b181fe401330..4142b638e5fa 100644 --- a/drivers/mfd/rk808.c +++ b/drivers/mfd/rk808.c @@ -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; } |