mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
b3b42b4a38
This driver adds support for the LED operational mode of the tps6105x MFD device. Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2019 Sven Van Asbroeck
|
|
*/
|
|
|
|
#include <linux/leds.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mfd/tps6105x.h>
|
|
#include <linux/regmap.h>
|
|
|
|
struct tps6105x_priv {
|
|
struct regmap *regmap;
|
|
struct led_classdev cdev;
|
|
struct fwnode_handle *fwnode;
|
|
};
|
|
|
|
static void tps6105x_handle_put(void *data)
|
|
{
|
|
struct tps6105x_priv *priv = data;
|
|
|
|
fwnode_handle_put(priv->fwnode);
|
|
}
|
|
|
|
static int tps6105x_brightness_set(struct led_classdev *cdev,
|
|
enum led_brightness brightness)
|
|
{
|
|
struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv,
|
|
cdev);
|
|
|
|
return regmap_update_bits(priv->regmap, TPS6105X_REG_0,
|
|
TPS6105X_REG0_TORCHC_MASK,
|
|
brightness << TPS6105X_REG0_TORCHC_SHIFT);
|
|
}
|
|
|
|
static int tps6105x_led_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
|
|
struct tps6105x_platform_data *pdata = tps6105x->pdata;
|
|
struct led_init_data init_data = { };
|
|
struct tps6105x_priv *priv;
|
|
int ret;
|
|
|
|
/* This instance is not set for torch mode so bail out */
|
|
if (pdata->mode != TPS6105X_MODE_TORCH) {
|
|
dev_info(&pdev->dev,
|
|
"chip not in torch mode, exit probe");
|
|
return -EINVAL;
|
|
}
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
/* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */
|
|
priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL);
|
|
ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv);
|
|
if (ret)
|
|
return ret;
|
|
priv->regmap = tps6105x->regmap;
|
|
priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
|
|
priv->cdev.max_brightness = 7;
|
|
init_data.devicename = "tps6105x";
|
|
init_data.default_label = ":torch";
|
|
init_data.fwnode = priv->fwnode;
|
|
|
|
ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
|
|
TPS6105X_REG0_MODE_MASK |
|
|
TPS6105X_REG0_TORCHC_MASK,
|
|
TPS6105X_REG0_MODE_TORCH <<
|
|
TPS6105X_REG0_MODE_SHIFT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev,
|
|
&init_data);
|
|
}
|
|
|
|
static struct platform_driver led_driver = {
|
|
.probe = tps6105x_led_probe,
|
|
.driver = {
|
|
.name = "tps6105x-leds",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(led_driver);
|
|
|
|
MODULE_DESCRIPTION("TPS6105x LED driver");
|
|
MODULE_AUTHOR("Sven Van Asbroeck <TheSven73@gmail.com>");
|
|
MODULE_LICENSE("GPL v2");
|