Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * LEDs driver for GPIOs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2007 8D Technologies inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Raphael Assenat <raph@8d.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright (C) 2008 Freescale Semiconductor, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/property.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) struct gpio_led_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct gpio_desc *gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	u8 can_sleep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	u8 blinking;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	gpio_blink_set_t platform_gpio_blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) static inline struct gpio_led_data *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 			cdev_to_gpio_led_data(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	return container_of(led_cdev, struct gpio_led_data, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static void gpio_led_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	int level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	if (value == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		level = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		level = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	if (led_dat->blinking) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		led_dat->platform_gpio_blink_set(led_dat->gpiod, level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 						 NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		led_dat->blinking = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		if (led_dat->can_sleep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			gpiod_set_value_cansleep(led_dat->gpiod, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			gpiod_set_value(led_dat->gpiod, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static int gpio_led_set_blocking(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	gpio_led_set(led_cdev, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static int gpio_blink_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	unsigned long *delay_on, unsigned long *delay_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	led_dat->blinking = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	return led_dat->platform_gpio_blink_set(led_dat->gpiod, GPIO_LED_BLINK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 						delay_on, delay_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static int create_gpio_led(const struct gpio_led *template,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct gpio_led_data *led_dat, struct device *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	struct fwnode_handle *fwnode, gpio_blink_set_t blink_set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	struct led_init_data init_data = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	int ret, state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	led_dat->cdev.default_trigger = template->default_trigger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	led_dat->can_sleep = gpiod_cansleep(led_dat->gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	if (!led_dat->can_sleep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		led_dat->cdev.brightness_set = gpio_led_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		led_dat->cdev.brightness_set_blocking = gpio_led_set_blocking;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	led_dat->blinking = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	if (blink_set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		led_dat->platform_gpio_blink_set = blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		led_dat->cdev.blink_set = gpio_blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		state = gpiod_get_value_cansleep(led_dat->gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (state < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			return state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		state = (template->default_state == LEDS_GPIO_DEFSTATE_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	led_dat->cdev.brightness = state ? LED_FULL : LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	if (!template->retain_state_suspended)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (template->panic_indicator)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		led_dat->cdev.flags |= LED_PANIC_INDICATOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (template->retain_state_shutdown)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		led_dat->cdev.flags |= LED_RETAIN_AT_SHUTDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ret = gpiod_direction_output(led_dat->gpiod, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (template->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		led_dat->cdev.name = template->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		ret = devm_led_classdev_register(parent, &led_dat->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		init_data.fwnode = fwnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		ret = devm_led_classdev_register_ext(parent, &led_dat->cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 						     &init_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct gpio_leds_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	int num_leds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct gpio_led_data leds[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct fwnode_handle *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	struct gpio_leds_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	int count, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	count = device_get_child_node_count(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		return ERR_PTR(-ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	device_for_each_child_node(dev, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		struct gpio_led_data *led_dat = &priv->leds[priv->num_leds];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		struct gpio_led led = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		const char *state = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		 * Acquire gpiod from DT with uninitialized label, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		 * will be updated after LED class device is registered,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		 * Only then the final LED name is known.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		led.gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL, child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 							     GPIOD_ASIS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 							     NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		if (IS_ERR(led.gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			fwnode_handle_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			return ERR_CAST(led.gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		led_dat->gpiod = led.gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		if (!fwnode_property_read_string(child, "default-state",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 						 &state)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			if (!strcmp(state, "keep"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 				led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			else if (!strcmp(state, "on"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 				led.default_state = LEDS_GPIO_DEFSTATE_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 				led.default_state = LEDS_GPIO_DEFSTATE_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		if (fwnode_property_present(child, "retain-state-suspended"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			led.retain_state_suspended = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (fwnode_property_present(child, "retain-state-shutdown"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			led.retain_state_shutdown = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		if (fwnode_property_present(child, "panic-indicator"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			led.panic_indicator = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		ret = create_gpio_led(&led, led_dat, dev, child, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			fwnode_handle_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		/* Set gpiod label to match the corresponding LED name. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		gpiod_set_consumer_name(led_dat->gpiod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 					led_dat->cdev.dev->kobj.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		priv->num_leds++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	return priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static const struct of_device_id of_gpio_leds_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	{ .compatible = "gpio-leds", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) MODULE_DEVICE_TABLE(of, of_gpio_leds_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static struct gpio_desc *gpio_led_get_gpiod(struct device *dev, int idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 					    const struct gpio_led *template)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct gpio_desc *gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	unsigned long flags = GPIOF_OUT_INIT_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	 * This means the LED does not come from the device tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	 * or ACPI, so let's try just getting it by index from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	 * device, this will hit the board file, if any and get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	 * the GPIO from there.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	gpiod = devm_gpiod_get_index(dev, NULL, idx, GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (!IS_ERR(gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		gpiod_set_consumer_name(gpiod, template->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		return gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (PTR_ERR(gpiod) != -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		return gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	 * This is the legacy code path for platform code that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	 * still uses GPIO numbers. Ultimately we would like to get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	 * rid of this block completely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	/* skip leds that aren't available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (!gpio_is_valid(template->gpio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (template->active_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		flags |= GPIOF_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	ret = devm_gpio_request_one(dev, template->gpio, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 				    template->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	gpiod = gpio_to_desc(template->gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	if (!gpiod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	return gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static int gpio_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	struct gpio_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct gpio_leds_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	int i, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (pdata && pdata->num_leds) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, pdata->num_leds),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 				    GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		priv->num_leds = pdata->num_leds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		for (i = 0; i < priv->num_leds; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 			const struct gpio_led *template = &pdata->leds[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 			struct gpio_led_data *led_dat = &priv->leds[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			if (template->gpiod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 				led_dat->gpiod = template->gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 				led_dat->gpiod =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 					gpio_led_get_gpiod(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 							   i, template);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			if (IS_ERR(led_dat->gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 				dev_info(&pdev->dev, "Skipping unavailable LED gpio %d (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 					 template->gpio, template->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 				continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			ret = create_gpio_led(template, led_dat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 					      &pdev->dev, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 					      pdata->gpio_blink_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 			if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		priv = gpio_leds_create(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		if (IS_ERR(priv))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			return PTR_ERR(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	platform_set_drvdata(pdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static void gpio_led_shutdown(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	struct gpio_leds_priv *priv = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	for (i = 0; i < priv->num_leds; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		struct gpio_led_data *led = &priv->leds[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		if (!(led->cdev.flags & LED_RETAIN_AT_SHUTDOWN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 			gpio_led_set(&led->cdev, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static struct platform_driver gpio_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	.probe		= gpio_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	.shutdown	= gpio_led_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		.name	= "leds-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		.of_match_table = of_gpio_leds_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) module_platform_driver(gpio_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) MODULE_AUTHOR("Raphael Assenat <raph@8d.com>, Trent Piepho <tpiepho@freescale.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) MODULE_DESCRIPTION("GPIO LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_ALIAS("platform:leds-gpio");