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power: reset: syscon-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

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Use device life-cycle managed register function to simplify probe and
exit paths.

This also makes our data struct per-device and not global, which allows
for more than one instance of this device.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240212162831.67838-20-afd@ti.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Andrew Davis 2024-02-12 10:28:31 -06:00 committed by Sebastian Reichel
parent ffa2128312
commit 14c5678720
1 changed files with 11 additions and 19 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

30
drivers/power/reset/syscon-poweroff.c
View file

@ -13,6 +13,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
struct syscon_poweroff_data {
@ -22,21 +23,24 @@ struct syscon_poweroff_data {
u32 mask;
};
static struct syscon_poweroff_data *data;
static void syscon_poweroff(void)
static int syscon_poweroff(struct sys_off_data *off_data)
{
struct syscon_poweroff_data *data = off_data->cb_data;
/* Issue the poweroff */
regmap_update_bits(data->map, data->offset, data->mask, data->value);
mdelay(1000);
pr_emerg("Unable to poweroff system\n");
return NOTIFY_DONE;
}
static int syscon_poweroff_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct syscon_poweroff_data *data;
int mask_err, value_err;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
@ -73,21 +77,10 @@ static int syscon_poweroff_probe(struct platform_device *pdev)
data->mask = 0xFFFFFFFF;
}
if (pm_power_off) {
dev_err(dev, "pm_power_off already claimed for %ps",
pm_power_off);
return -EBUSY;
}
pm_power_off = syscon_poweroff;
return 0;
}
static void syscon_poweroff_remove(struct platform_device *pdev)
{
if (pm_power_off == syscon_poweroff)
pm_power_off = NULL;
return devm_register_sys_off_handler(&pdev->dev,
SYS_OFF_MODE_POWER_OFF,
SYS_OFF_PRIO_DEFAULT,
syscon_poweroff, data);
}
static const struct of_device_id syscon_poweroff_of_match[] = {
@ -97,7 +90,6 @@ static const struct of_device_id syscon_poweroff_of_match[] = {
static struct platform_driver syscon_poweroff_driver = {
.probe = syscon_poweroff_probe,
.remove_new = syscon_poweroff_remove,
.driver = {
.name = "syscon-poweroff",
.of_match_table = syscon_poweroff_of_match,