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mfd: max96752f: Add support for enable GPIO

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Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: I6fc6933f037d7f8cc53e3c8c49233a14c9301a1f
This commit is contained in:
Wyon Bi
2022-07-23 05:10:38 +00:00
committed by Tao Huang
parent 9a01bbc010
commit 69882bde7f
2 changed files with 45 additions and 0 deletions
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44
drivers/mfd/max96752f.c
View File

@@ -71,6 +71,20 @@ void max96752f_init(struct max96752f *max96752f)
}
EXPORT_SYMBOL(max96752f_init);
static void max96752f_power_on(struct max96752f *max96752f)
{
if (max96752f->enable_gpio) {
gpiod_direction_output(max96752f->enable_gpio, 1);
msleep(500);
}
}
static void max96752f_power_off(struct max96752f *max96752f)
{
if (max96752f->enable_gpio)
gpiod_direction_output(max96752f->enable_gpio, 0);
}
static int max96752f_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
@@ -98,6 +112,12 @@ static int max96752f_i2c_probe(struct i2c_client *client)
max96752f->dev = dev;
max96752f->client = client;
max96752f->enable_gpio = devm_gpiod_get_optional(dev, "enable",
GPIOD_ASIS);
if (IS_ERR(max96752f->enable_gpio))
return dev_err_probe(dev, PTR_ERR(max96752f->enable_gpio),
"failed to get enable GPIO\n");
ret = device_property_read_u32(dev->parent, "reg", &max96752f->stream_id);
if (ret)
return dev_err_probe(dev, ret, "failed to get gmsl id\n");
@@ -110,6 +130,7 @@ static int max96752f_i2c_probe(struct i2c_client *client)
return dev_err_probe(dev, PTR_ERR(max96752f->regmap),
"failed to initialize regmap\n");
max96752f_power_on(max96752f);
max96752f_init(max96752f);
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, max96752f_devs,
@@ -137,8 +158,30 @@ static void max96752f_i2c_shutdown(struct i2c_client *client)
regmap_update_bits(max96752f->regmap, 0x0010, RESET_ALL,
FIELD_PREP(RESET_ALL, 1));
max96752f_power_off(max96752f);
}
static int __maybe_unused max96752f_suspend(struct device *dev)
{
struct max96752f *max96752f = dev_get_drvdata(dev);
max96752f_power_off(max96752f);
return 0;
}
static int __maybe_unused max96752f_resume(struct device *dev)
{
struct max96752f *max96752f = dev_get_drvdata(dev);
max96752f_power_on(max96752f);
return 0;
}
static SIMPLE_DEV_PM_OPS(max96752f_pm_ops, max96752f_suspend, max96752f_resume);
static const struct of_device_id max96752f_of_match[] = {
{ .compatible = "maxim,max96752f", },
{}
@@ -149,6 +192,7 @@ static struct i2c_driver max96752f_i2c_driver = {
.driver = {
.name = "max96752f",
.of_match_table = of_match_ptr(max96752f_of_match),
.pm = &max96752f_pm_ops,
},
.probe_new = max96752f_i2c_probe,
.shutdown = max96752f_i2c_shutdown,

1
include/linux/mfd/max96752f.h
View File

@@ -105,6 +105,7 @@ struct max96752f {
struct regmap *regmap;
struct i2c_client *client;
struct i2c_mux_core *muxc;
struct gpio_desc *enable_gpio;
u32 stream_id;
};