Release 4.12 drivers/leds/leds-gpio.c
/*
* LEDs driver for GPIOs
*
* Copyright (C) 2007 8D Technologies inc.
* Raphael Assenat <raph@8d.com>
* Copyright (C) 2008 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/slab.h>
struct gpio_led_data {
struct led_classdev cdev;
struct gpio_desc *gpiod;
u8 can_sleep;
u8 blinking;
gpio_blink_set_t platform_gpio_blink_set;
};
static inline struct gpio_led_data *
cdev_to_gpio_led_data(struct led_classdev *led_cdev)
{
return container_of(led_cdev, struct gpio_led_data, cdev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Heiner Kallweit | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static void gpio_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
int level;
if (value == LED_OFF)
level = 0;
else
level = 1;
if (led_dat->blinking) {
led_dat->platform_gpio_blink_set(led_dat->gpiod, level,
NULL, NULL);
led_dat->blinking = 0;
} else {
if (led_dat->can_sleep)
gpiod_set_value_cansleep(led_dat->gpiod, level);
else
gpiod_set_value(led_dat->gpiod, level);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Raphaël Assénat | 49 | 49.00% | 1 | 16.67% |
| Benjamin Herrenschmidt | 29 | 29.00% | 1 | 16.67% |
| Jacek Anaszewski | 17 | 17.00% | 1 | 16.67% |
| Mika Westerberg | 4 | 4.00% | 2 | 33.33% |
| Heiner Kallweit | 1 | 1.00% | 1 | 16.67% |
| Total | 100 | 100.00% | 6 | 100.00% |
static int gpio_led_set_blocking(struct led_classdev *led_cdev,
enum led_brightness value)
{
gpio_led_set(led_cdev, value);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jacek Anaszewski | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static int gpio_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
led_dat->blinking = 1;
return led_dat->platform_gpio_blink_set(led_dat->gpiod, GPIO_LED_BLINK,
delay_on, delay_off);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Valerio Riedel | 41 | 77.36% | 1 | 25.00% |
| Benjamin Herrenschmidt | 8 | 15.09% | 1 | 25.00% |
| Mika Westerberg | 3 | 5.66% | 1 | 25.00% |
| Heiner Kallweit | 1 | 1.89% | 1 | 25.00% |
| Total | 53 | 100.00% | 4 | 100.00% |
static int create_gpio_led(const struct gpio_led *template,
struct gpio_led_data *led_dat, struct device *parent,
struct device_node *np, gpio_blink_set_t blink_set)
{
int ret, state;
led_dat->gpiod = template->gpiod;
if (!led_dat->gpiod) {
/*
* This is the legacy code path for platform code that
* still uses GPIO numbers. Ultimately we would like to get
* rid of this block completely.
*/
unsigned long flags = GPIOF_OUT_INIT_LOW;
/* skip leds that aren't available */
if (!gpio_is_valid(template->gpio)) {
dev_info(parent, "Skipping unavailable LED gpio %d (%s)\n",
template->gpio, template->name);
return 0;
}
if (template->active_low)
flags |= GPIOF_ACTIVE_LOW;
ret = devm_gpio_request_one(parent, template->gpio, flags,
template->name);
if (ret < 0)
return ret;
led_dat->gpiod = gpio_to_desc(template->gpio);
if (!led_dat->gpiod)
return -EINVAL;
}
led_dat->cdev.name = template->name;
led_dat->cdev.default_trigger = template->default_trigger;
led_dat->can_sleep = gpiod_cansleep(led_dat->gpiod);
if (!led_dat->can_sleep)
led_dat->cdev.brightness_set = gpio_led_set;
else
led_dat->cdev.brightness_set_blocking = gpio_led_set_blocking;
led_dat->blinking = 0;
if (blink_set) {
led_dat->platform_gpio_blink_set = blink_set;
led_dat->cdev.blink_set = gpio_blink_set;
}
if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) {
state = gpiod_get_value_cansleep(led_dat->gpiod);
if (state < 0)
return state;
} else {
state = (template->default_state == LEDS_GPIO_DEFSTATE_ON);
}
led_dat->cdev.brightness = state ? LED_FULL : LED_OFF;
if (!template->retain_state_suspended)
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
if (template->panic_indicator)
led_dat->cdev.flags |= LED_PANIC_INDICATOR;
ret = gpiod_direction_output(led_dat->gpiod, state);
if (ret < 0)
return ret;
return devm_of_led_classdev_register(parent, np, &led_dat->cdev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Trent Piepho | 61 | 17.73% | 2 | 8.00% |
| Raphaël Assénat | 53 | 15.41% | 1 | 4.00% |
| Mika Westerberg | 52 | 15.12% | 2 | 8.00% |
| David Brownell | 35 | 10.17% | 3 | 12.00% |
| Jacek Anaszewski | 24 | 6.98% | 1 | 4.00% |
| Timo Teräs | 24 | 6.98% | 1 | 4.00% |
| Herbert Valerio Riedel | 18 | 5.23% | 1 | 4.00% |
| Richard Purdie | 15 | 4.36% | 2 | 8.00% |
| Heiner Kallweit | 14 | 4.07% | 2 | 8.00% |
| Ezequiel García | 14 | 4.07% | 1 | 4.00% |
| Geert Uytterhoeven | 11 | 3.20% | 2 | 8.00% |
| Rafał Miłecki | 8 | 2.33% | 1 | 4.00% |
| Benjamin Herrenschmidt | 4 | 1.16% | 1 | 4.00% |
| Jingoo Han | 3 | 0.87% | 1 | 4.00% |
| Wei Yongjun | 3 | 0.87% | 1 | 4.00% |
| Sachin Kamat | 3 | 0.87% | 1 | 4.00% |
| Dmitry Baryshkov | 1 | 0.29% | 1 | 4.00% |
| Michal Simek | 1 | 0.29% | 1 | 4.00% |
| Total | 344 | 100.00% | 25 | 100.00% |
struct gpio_leds_priv {
int num_leds;
struct gpio_led_data leds[];
};
static inline int sizeof_gpio_leds_priv(int num_leds)
{
return sizeof(struct gpio_leds_priv) +
(sizeof(struct gpio_led_data) * num_leds);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Grant C. Likely | 27 | 100.00% | 1 | 100.00% |
| Total | 27 | 100.00% | 1 | 100.00% |
static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fwnode_handle *child;
struct gpio_leds_priv *priv;
int count, ret;
count = device_get_child_node_count(dev);
if (!count)
return ERR_PTR(-ENODEV);
priv = devm_kzalloc(dev, sizeof_gpio_leds_priv(count), GFP_KERNEL);
if (!priv)
return ERR_PTR(-ENOMEM);
device_for_each_child_node(dev, child) {
struct gpio_led_data *led_dat = &priv->leds[priv->num_leds];
struct gpio_led led = {};
const char *state = NULL;
struct device_node *np = to_of_node(child);
ret = fwnode_property_read_string(child, "label", &led.name);
if (ret && IS_ENABLED(CONFIG_OF) && np)
led.name = np->name;
if (!led.name) {
fwnode_handle_put(child);
return ERR_PTR(-EINVAL);
}
led.gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL, child,
GPIOD_ASIS,
led.name);
if (IS_ERR(led.gpiod)) {
fwnode_handle_put(child);
return ERR_CAST(led.gpiod);
}
fwnode_property_read_string(child, "linux,default-trigger",
&led.default_trigger);
if (!fwnode_property_read_string(child, "default-state",
&state)) {
if (!strcmp(state, "keep"))
led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
else if (!strcmp(state, "on"))
led.default_state = LEDS_GPIO_DEFSTATE_ON;
else
led.default_state = LEDS_GPIO_DEFSTATE_OFF;
}
if (fwnode_property_present(child, "retain-state-suspended"))
led.retain_state_suspended = 1;
if (fwnode_property_present(child, "panic-indicator"))
led.panic_indicator = 1;
ret = create_gpio_led(&led, led_dat, dev, np, NULL);
if (ret < 0) {
fwnode_handle_put(child);
return ERR_PTR(ret);
}
led_dat->cdev.dev->of_node = np;
priv->num_leds++;
}
return priv;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Grant C. Likely | 112 | 29.79% | 1 | 4.76% |
| Alexander Stein | 42 | 11.17% | 1 | 4.76% |
| Rafael J. Wysocki | 31 | 8.24% | 1 | 4.76% |
| Heiner Kallweit | 30 | 7.98% | 3 | 14.29% |
| Trent Piepho | 29 | 7.71% | 1 | 4.76% |
| Rafał Miłecki | 28 | 7.45% | 2 | 9.52% |
| Fabio Estevam | 27 | 7.18% | 2 | 9.52% |
| Raphaël Assénat | 20 | 5.32% | 1 | 4.76% |
| Ezequiel García | 15 | 3.99% | 1 | 4.76% |
| Robin Gong | 14 | 3.72% | 1 | 4.76% |
| Roland Stigge | 11 | 2.93% | 1 | 4.76% |
| Sebastian Hesselbarth | 5 | 1.33% | 1 | 4.76% |
| David Brownell | 4 | 1.06% | 1 | 4.76% |
| Sachin Kamat | 3 | 0.80% | 1 | 4.76% |
| Jacek Anaszewski | 2 | 0.53% | 1 | 4.76% |
| Tobias Klauser | 2 | 0.53% | 1 | 4.76% |
| Boris Brezillon | 1 | 0.27% | 1 | 4.76% |
| Total | 376 | 100.00% | 21 | 100.00% |
static const struct of_device_id of_gpio_leds_match[] = {
{ .compatible = "gpio-leds", },
{},
};
MODULE_DEVICE_TABLE(of, of_gpio_leds_match);
static int gpio_led_probe(struct platform_device *pdev)
{
struct gpio_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct gpio_leds_priv *priv;
int i, ret = 0;
if (pdata && pdata->num_leds) {
priv = devm_kzalloc(&pdev->dev,
sizeof_gpio_leds_priv(pdata->num_leds),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->num_leds = pdata->num_leds;
for (i = 0; i < priv->num_leds; i++) {
ret = create_gpio_led(&pdata->leds[i], &priv->leds[i],
&pdev->dev, NULL,
pdata->gpio_blink_set);
if (ret < 0)
return ret;
}
} else {
priv = gpio_leds_create(pdev);
if (IS_ERR(priv))
return PTR_ERR(priv);
}
platform_set_drvdata(pdev, priv);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Grant C. Likely | 88 | 50.87% | 3 | 30.00% |
| Trent Piepho | 65 | 37.57% | 2 | 20.00% |
| Roland Stigge | 7 | 4.05% | 1 | 10.00% |
| Sachin Kamat | 6 | 3.47% | 1 | 10.00% |
| Jingoo Han | 4 | 2.31% | 1 | 10.00% |
| Rafał Miłecki | 2 | 1.16% | 1 | 10.00% |
| Rafael J. Wysocki | 1 | 0.58% | 1 | 10.00% |
| Total | 173 | 100.00% | 10 | 100.00% |
static void gpio_led_shutdown(struct platform_device *pdev)
{
struct gpio_leds_priv *priv = platform_get_drvdata(pdev);
int i;
for (i = 0; i < priv->num_leds; i++) {
struct gpio_led_data *led = &priv->leds[i];
gpio_led_set(&led->cdev, LED_OFF);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Heiko Schocher | 64 | 100.00% | 1 | 100.00% |
| Total | 64 | 100.00% | 1 | 100.00% |
static struct platform_driver gpio_led_driver = {
.probe = gpio_led_probe,
.shutdown = gpio_led_shutdown,
.driver = {
.name = "leds-gpio",
.of_match_table = of_gpio_leds_match,
},
};
module_platform_driver(gpio_led_driver);
MODULE_AUTHOR("Raphael Assenat <raph@8d.com>, Trent Piepho <tpiepho@freescale.com>");
MODULE_DESCRIPTION("GPIO LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:leds-gpio");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Grant C. Likely | 257 | 19.24% | 4 | 7.02% |
| Trent Piepho | 187 | 14.00% | 2 | 3.51% |
| Raphaël Assénat | 151 | 11.30% | 1 | 1.75% |
| Heiner Kallweit | 73 | 5.46% | 6 | 10.53% |
| Heiko Schocher | 69 | 5.16% | 1 | 1.75% |
| Jacek Anaszewski | 68 | 5.09% | 2 | 3.51% |
| Mika Westerberg | 66 | 4.94% | 2 | 3.51% |
| Herbert Valerio Riedel | 60 | 4.49% | 1 | 1.75% |
| Benjamin Herrenschmidt | 44 | 3.29% | 1 | 1.75% |
| David Brownell | 44 | 3.29% | 4 | 7.02% |
| Alexander Stein | 42 | 3.14% | 1 | 1.75% |
| Rafał Miłecki | 38 | 2.84% | 2 | 3.51% |
| Rafael J. Wysocki | 34 | 2.54% | 1 | 1.75% |
| Ezequiel García | 29 | 2.17% | 1 | 1.75% |
| Fabio Estevam | 27 | 2.02% | 2 | 3.51% |
| Timo Teräs | 24 | 1.80% | 1 | 1.75% |
| Richard Purdie | 19 | 1.42% | 3 | 5.26% |
| Roland Stigge | 18 | 1.35% | 1 | 1.75% |
| Sachin Kamat | 14 | 1.05% | 3 | 5.26% |
| Geert Uytterhoeven | 14 | 1.05% | 3 | 5.26% |
| Robin Gong | 14 | 1.05% | 1 | 1.75% |
| Paolo Pisati | 7 | 0.52% | 1 | 1.75% |
| Jingoo Han | 7 | 0.52% | 2 | 3.51% |
| Axel Lin | 6 | 0.45% | 1 | 1.75% |
| Sebastian Hesselbarth | 5 | 0.37% | 1 | 1.75% |
| Xiubo Li | 5 | 0.37% | 1 | 1.75% |
| Wei Yongjun | 3 | 0.22% | 1 | 1.75% |
| Tejun Heo | 2 | 0.15% | 1 | 1.75% |
| Tobias Klauser | 2 | 0.15% | 1 | 1.75% |
| Mark Brown | 2 | 0.15% | 1 | 1.75% |
| Kay Sievers | 2 | 0.15% | 1 | 1.75% |
| Dmitry Baryshkov | 1 | 0.07% | 1 | 1.75% |
| Michal Simek | 1 | 0.07% | 1 | 1.75% |
| Boris Brezillon | 1 | 0.07% | 1 | 1.75% |
| Total | 1336 | 100.00% | 57 | 100.00% |
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