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power: reset: gpio-poweroff: use sys-off handler API

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Use the new sys-off handler API for gpio-poweroff. This allows us to
have more than one poweroff handler and prioritise them.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20231006130428.11259-3-francesco@dolcini.it
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Stefan Eichenberger
2023-10-06 10:04:26 -03:00
committed by Sebastian Reichel
parent 13b4c69646
commit b16d9f4973
1 changed files with 12 additions and 25 deletions
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drivers/power/reset/gpio-poweroff.c
+12 -25
View File
@@ -15,6 +15,7 @@
#include <linux/gpio/consumer.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/reboot.h>
#define DEFAULT_TIMEOUT_MS 3000
@@ -25,15 +26,9 @@ struct gpio_poweroff {
u32 inactive_delay_ms;
};
/*
* Hold configuration here, cannot be more than one instance of the driver
* since pm_power_off itself is global.
*/
static struct gpio_poweroff *gpio_poweroff;
static void gpio_poweroff_do_poweroff(void)
static int gpio_poweroff_do_poweroff(struct sys_off_data *data)
{
BUG_ON(!gpio_poweroff);
struct gpio_poweroff *gpio_poweroff = data->cb_data;
/* drive it active, also inactive->active edge */
gpiod_direction_output(gpio_poweroff->reset_gpio, 1);
@@ -50,20 +45,16 @@ static void gpio_poweroff_do_poweroff(void)
mdelay(gpio_poweroff->timeout_ms);
WARN_ON(1);
return NOTIFY_DONE;
}
static int gpio_poweroff_probe(struct platform_device *pdev)
{
struct gpio_poweroff *gpio_poweroff;
bool input = false;
enum gpiod_flags flags;
/* If a pm_power_off function has already been added, leave it alone */
if (pm_power_off != NULL) {
dev_err(&pdev->dev,
"%s: pm_power_off function already registered\n",
__func__);
return -EBUSY;
}
int ret;
gpio_poweroff = devm_kzalloc(&pdev->dev, sizeof(*gpio_poweroff), GFP_KERNEL);
if (!gpio_poweroff)
@@ -89,14 +80,11 @@ static int gpio_poweroff_probe(struct platform_device *pdev)
if (IS_ERR(gpio_poweroff->reset_gpio))
return PTR_ERR(gpio_poweroff->reset_gpio);
pm_power_off = &gpio_poweroff_do_poweroff;
return 0;
}
static int gpio_poweroff_remove(struct platform_device *pdev)
{
if (pm_power_off == &gpio_poweroff_do_poweroff)
pm_power_off = NULL;
ret = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF,
SYS_OFF_PRIO_DEFAULT, gpio_poweroff_do_poweroff,
gpio_poweroff);
if (ret)
return dev_err_probe(&pdev->dev, ret, "Cannot register poweroff handler\n");
return 0;
}
@@ -109,7 +97,6 @@ MODULE_DEVICE_TABLE(of, of_gpio_poweroff_match);
static struct platform_driver gpio_poweroff_driver = {
.probe = gpio_poweroff_probe,
.remove = gpio_poweroff_remove,
.driver = {
.name = "poweroff-gpio",
.of_match_table = of_gpio_poweroff_match,