Messages in this thread Patch in this message | | | From | Sean Nyekjaer <> | Subject | [PATCH 2/2] mfd: stpmic1: add pmic poweroff via sys-off handler | Date | Fri, 28 Apr 2023 13:28:46 +0200 |
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Use devm_register_sys_off_handler() that allows to register multiple power-off handlers.
This can be enabled by adding "st,pmic-poweroff" to device-tree.
Signed-off-by: Sean Nyekjaer <sean@geanix.com> --- drivers/mfd/stpmic1.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/drivers/mfd/stpmic1.c b/drivers/mfd/stpmic1.c index 4c9b18d9dec8..c628141eb03c 100644 --- a/drivers/mfd/stpmic1.c +++ b/drivers/mfd/stpmic1.c @@ -7,6 +7,7 @@ #include <linux/mfd/core.h> #include <linux/mfd/stpmic1.h> #include <linux/module.h> +#include <linux/reboot.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/of_platform.h> @@ -117,6 +118,33 @@ static const struct regmap_irq_chip stpmic1_regmap_irq_chip = { .num_irqs = ARRAY_SIZE(stpmic1_irqs), }; +static int stpmic1_power_off(struct sys_off_data *data) +{ + struct stpmic1 *ddata = data->cb_data; + + regmap_update_bits(ddata->regmap, MAIN_CR, + SOFTWARE_SWITCH_OFF, SOFTWARE_SWITCH_OFF); + + return NOTIFY_DONE; +} + +static int stpmic1_power_off_prepare_init(struct stpmic1 *ddata) +{ + int ret; + + ret = devm_register_sys_off_handler(ddata->dev, + SYS_OFF_MODE_POWER_OFF, + SYS_OFF_PRIO_DEFAULT, + stpmic1_power_off, + ddata); + if (ret) { + dev_err(ddata->dev, "failed to register sys-off handler: %d\n", ret); + return ret; + } + + return 0; +} + static int stpmic1_probe(struct i2c_client *i2c) { struct stpmic1 *ddata; @@ -159,6 +187,12 @@ static int stpmic1_probe(struct i2c_client *i2c) return ret; } + if (of_property_read_bool(i2c->dev.of_node, "st,pmic-poweroff")) { + ret = stpmic1_power_off_prepare_init(ddata); + if (ret) + return ret; + } + return devm_of_platform_populate(dev); } -- 2.40.0
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