mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 14:11:52 +00:00
c49d6cab0d
Do the parsing of `linux,default-trigger` DT property to LED core. Currently it is done in many different drivers and the code is repeated. This patch removes the parsing from 23 drivers: an30259a, aw2013, bcm6328, bcm6358, cr0014114, el15203000, gpio, is31fl32xx, lm3532, lm36274, lm3692x, lm3697, lp50xx, lp8860, lt3593, max77650, mt6323, ns2, pm8058, pwm, syscon, tlc591xx and turris-omnia. There is one driver in drivers/input which parses this property on it's own. I shall send a separate patch there after this is applied. There are still 8 drivers that parse this property on their own because they do not pass the led_init_data structure to the registering function. I will try to refactor those in the future. Signed-off-by: Marek Behún <marek.behun@nic.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
149 lines
3.6 KiB
C
149 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright (C) 2018 BayLibre SAS
|
|
// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
|
|
//
|
|
// LED driver for MAXIM 77650/77651 charger/power-supply.
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/mfd/max77650.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#define MAX77650_LED_NUM_LEDS 3
|
|
|
|
#define MAX77650_LED_A_BASE 0x40
|
|
#define MAX77650_LED_B_BASE 0x43
|
|
|
|
#define MAX77650_LED_BR_MASK GENMASK(4, 0)
|
|
#define MAX77650_LED_EN_MASK GENMASK(7, 6)
|
|
|
|
#define MAX77650_LED_MAX_BRIGHTNESS MAX77650_LED_BR_MASK
|
|
|
|
/* Enable EN_LED_MSTR. */
|
|
#define MAX77650_LED_TOP_DEFAULT BIT(0)
|
|
|
|
#define MAX77650_LED_ENABLE GENMASK(7, 6)
|
|
#define MAX77650_LED_DISABLE 0x00
|
|
|
|
#define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE
|
|
/* 100% on duty */
|
|
#define MAX77650_LED_B_DEFAULT GENMASK(3, 0)
|
|
|
|
struct max77650_led {
|
|
struct led_classdev cdev;
|
|
struct regmap *map;
|
|
unsigned int regA;
|
|
unsigned int regB;
|
|
};
|
|
|
|
static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
|
|
{
|
|
return container_of(cdev, struct max77650_led, cdev);
|
|
}
|
|
|
|
static int max77650_led_brightness_set(struct led_classdev *cdev,
|
|
enum led_brightness brightness)
|
|
{
|
|
struct max77650_led *led = max77650_to_led(cdev);
|
|
int val, mask;
|
|
|
|
mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
|
|
|
|
if (brightness == LED_OFF)
|
|
val = MAX77650_LED_DISABLE;
|
|
else
|
|
val = MAX77650_LED_ENABLE | brightness;
|
|
|
|
return regmap_update_bits(led->map, led->regA, mask, val);
|
|
}
|
|
|
|
static int max77650_led_probe(struct platform_device *pdev)
|
|
{
|
|
struct fwnode_handle *child;
|
|
struct max77650_led *leds, *led;
|
|
struct device *dev;
|
|
struct regmap *map;
|
|
int rv, num_leds;
|
|
u32 reg;
|
|
|
|
dev = &pdev->dev;
|
|
|
|
leds = devm_kcalloc(dev, sizeof(*leds),
|
|
MAX77650_LED_NUM_LEDS, GFP_KERNEL);
|
|
if (!leds)
|
|
return -ENOMEM;
|
|
|
|
map = dev_get_regmap(dev->parent, NULL);
|
|
if (!map)
|
|
return -ENODEV;
|
|
|
|
num_leds = device_get_child_node_count(dev);
|
|
if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS)
|
|
return -ENODEV;
|
|
|
|
device_for_each_child_node(dev, child) {
|
|
struct led_init_data init_data = {};
|
|
|
|
rv = fwnode_property_read_u32(child, "reg", ®);
|
|
if (rv || reg >= MAX77650_LED_NUM_LEDS) {
|
|
rv = -EINVAL;
|
|
goto err_node_put;
|
|
}
|
|
|
|
led = &leds[reg];
|
|
led->map = map;
|
|
led->regA = MAX77650_LED_A_BASE + reg;
|
|
led->regB = MAX77650_LED_B_BASE + reg;
|
|
led->cdev.brightness_set_blocking = max77650_led_brightness_set;
|
|
led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS;
|
|
|
|
init_data.fwnode = child;
|
|
init_data.devicename = "max77650";
|
|
/* for backwards compatibility if `label` is not present */
|
|
init_data.default_label = ":";
|
|
|
|
rv = devm_led_classdev_register_ext(dev, &led->cdev,
|
|
&init_data);
|
|
if (rv)
|
|
goto err_node_put;
|
|
|
|
rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
|
|
if (rv)
|
|
goto err_node_put;
|
|
|
|
rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
|
|
if (rv)
|
|
goto err_node_put;
|
|
}
|
|
|
|
return regmap_write(map,
|
|
MAX77650_REG_CNFG_LED_TOP,
|
|
MAX77650_LED_TOP_DEFAULT);
|
|
err_node_put:
|
|
fwnode_handle_put(child);
|
|
return rv;
|
|
}
|
|
|
|
static const struct of_device_id max77650_led_of_match[] = {
|
|
{ .compatible = "maxim,max77650-led" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, max77650_led_of_match);
|
|
|
|
static struct platform_driver max77650_led_driver = {
|
|
.driver = {
|
|
.name = "max77650-led",
|
|
.of_match_table = max77650_led_of_match,
|
|
},
|
|
.probe = max77650_led_probe,
|
|
};
|
|
module_platform_driver(max77650_led_driver);
|
|
|
|
MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
|
|
MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:max77650-led");
|