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gpio: fxl6408: Add suspend/resume support 

Currently, during suspend, do nothing; during resume, just sync the
regmap cache to hw regs.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Link: https://lore.kernel.org/r/20251119140455.10096-1-jszhang@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Jisheng Zhang 2025-11-19 22:04:55 +08:00 committed by Bartosz Golaszewski
parent 5dd9332c61
commit 87100151e0
1 changed files with 13 additions and 0 deletions
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13
drivers/gpio/gpio-fxl6408.c
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@ -123,6 +123,8 @@ static int fxl6408_probe(struct i2c_client *client)
if (ret)
return ret;
i2c_set_clientdata(client, gpio_config.regmap);
/* Disable High-Z of outputs, so that our OUTPUT updates actually take effect. */
ret = regmap_write(gpio_config.regmap, FXL6408_REG_OUTPUT_HIGH_Z, 0);
if (ret)
@ -131,6 +133,16 @@ static int fxl6408_probe(struct i2c_client *client)
return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &gpio_config));
}
static int fxl6408_resume(struct device *dev)
{
struct regmap *regmap = dev_get_drvdata(dev);
regcache_mark_dirty(regmap);
return regcache_sync(regmap);
}
static DEFINE_SIMPLE_DEV_PM_OPS(fxl6408_pm_ops, NULL, fxl6408_resume);
static const __maybe_unused struct of_device_id fxl6408_dt_ids[] = {
{ .compatible = "fcs,fxl6408" },
{ }
@ -146,6 +158,7 @@ MODULE_DEVICE_TABLE(i2c, fxl6408_id);
static struct i2c_driver fxl6408_driver = {
.driver = {
.name = "fxl6408",
.pm = pm_sleep_ptr(&fxl6408_pm_ops),
.of_match_table = fxl6408_dt_ids,
},
.probe = fxl6408_probe,