Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) // Copyright (C) 2020 Luca Weiss <luca@z3ntu.xyz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/led-class-flash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <media/v4l2-flash-led-class.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define FLASH_TIMEOUT_DEFAULT		250000U /* 250ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #define FLASH_MAX_TIMEOUT_DEFAULT	300000U /* 300ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) struct sgm3140 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	struct led_classdev_flash fled_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	struct v4l2_flash *v4l2_flash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	struct timer_list powerdown_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	struct gpio_desc *flash_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct gpio_desc *enable_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct regulator *vin_regulator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	bool enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	/* current timeout in us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	u32 timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	/* maximum timeout in us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	u32 max_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static struct sgm3140 *flcdev_to_sgm3140(struct led_classdev_flash *flcdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	return container_of(flcdev, struct sgm3140, fled_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int sgm3140_strobe_set(struct led_classdev_flash *fled_cdev, bool state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (priv->enabled == state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	if (state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		ret = regulator_enable(priv->vin_regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 			dev_err(fled_cdev->led_cdev.dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 				"failed to enable regulator: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		gpiod_set_value_cansleep(priv->flash_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		gpiod_set_value_cansleep(priv->enable_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		mod_timer(&priv->powerdown_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 			  jiffies + usecs_to_jiffies(priv->timeout));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		del_timer_sync(&priv->powerdown_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		gpiod_set_value_cansleep(priv->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		gpiod_set_value_cansleep(priv->flash_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		ret = regulator_disable(priv->vin_regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			dev_err(fled_cdev->led_cdev.dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 				"failed to disable regulator: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	priv->enabled = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	return 0;
^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 sgm3140_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	*state = timer_pending(&priv->powerdown_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) static int sgm3140_timeout_set(struct led_classdev_flash *fled_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 			       u32 timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	priv->timeout = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static const struct led_flash_ops sgm3140_flash_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	.strobe_set = sgm3140_strobe_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	.strobe_get = sgm3140_strobe_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	.timeout_set = sgm3140_timeout_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static int sgm3140_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 				  enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	bool enable = brightness == LED_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (priv->enabled == enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		ret = regulator_enable(priv->vin_regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			dev_err(led_cdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				"failed to enable regulator: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		gpiod_set_value_cansleep(priv->enable_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		gpiod_set_value_cansleep(priv->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		ret = regulator_disable(priv->vin_regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			dev_err(led_cdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 				"failed to disable regulator: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		}
^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) 	priv->enabled = enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static void sgm3140_powerdown_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct sgm3140 *priv = from_timer(priv, t, powerdown_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	gpiod_set_value(priv->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	gpiod_set_value(priv->flash_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	regulator_disable(priv->vin_regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	priv->enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static void sgm3140_init_flash_timeout(struct sgm3140 *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	struct led_classdev_flash *fled_cdev = &priv->fled_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	struct led_flash_setting *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	/* Init flash timeout setting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	s = &fled_cdev->timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	s->min = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	s->max = priv->max_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	s->step = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	s->val = FLASH_TIMEOUT_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 					struct v4l2_flash_config *v4l2_sd_cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	struct led_classdev *led_cdev = &priv->fled_cdev.led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct led_flash_setting *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	strscpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		sizeof(v4l2_sd_cfg->dev_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	/* Init flash intensity setting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	s = &v4l2_sd_cfg->intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	s->min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	s->max = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	s->step = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	s->val = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 					struct v4l2_flash_config *v4l2_sd_cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static int sgm3140_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	struct sgm3140 *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	struct led_classdev *led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	struct led_classdev_flash *fled_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct led_init_data init_data = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	struct fwnode_handle *child_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct v4l2_flash_config v4l2_sd_cfg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	priv->flash_gpio = devm_gpiod_get(&pdev->dev, "flash", GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	ret = PTR_ERR_OR_ZERO(priv->flash_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		return dev_err_probe(&pdev->dev, ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 				     "Failed to request flash gpio\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	priv->enable_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	ret = PTR_ERR_OR_ZERO(priv->enable_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		return dev_err_probe(&pdev->dev, ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 				     "Failed to request enable gpio\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	priv->vin_regulator = devm_regulator_get(&pdev->dev, "vin");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	ret = PTR_ERR_OR_ZERO(priv->vin_regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		return dev_err_probe(&pdev->dev, ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				     "Failed to request regulator\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	child_node = fwnode_get_next_available_child_node(pdev->dev.fwnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 							  NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (!child_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		dev_err(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			"No fwnode child node found for connected LED.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	ret = fwnode_property_read_u32(child_node, "flash-max-timeout-us",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 				       &priv->max_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		priv->max_timeout = FLASH_MAX_TIMEOUT_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		dev_warn(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			 "flash-max-timeout-us property missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	 * Set default timeout to FLASH_DEFAULT_TIMEOUT except if max_timeout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	 * from DT is lower.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	priv->timeout = min(priv->max_timeout, FLASH_TIMEOUT_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	timer_setup(&priv->powerdown_timer, sgm3140_powerdown_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	fled_cdev = &priv->fled_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	led_cdev = &fled_cdev->led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	fled_cdev->ops = &sgm3140_flash_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	led_cdev->brightness_set_blocking = sgm3140_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	led_cdev->max_brightness = LED_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	led_cdev->flags |= LED_DEV_CAP_FLASH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	sgm3140_init_flash_timeout(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	init_data.fwnode = child_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	platform_set_drvdata(pdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	/* Register in the LED subsystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	ret = devm_led_classdev_flash_register_ext(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 						   fled_cdev, &init_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		dev_err(&pdev->dev, "Failed to register flash device: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	sgm3140_init_v4l2_flash_config(priv, &v4l2_sd_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	/* Create V4L2 Flash subdev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	priv->v4l2_flash = v4l2_flash_init(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 					   child_node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 					   fled_cdev, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 					   &v4l2_sd_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	if (IS_ERR(priv->v4l2_flash)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		ret = PTR_ERR(priv->v4l2_flash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	fwnode_handle_put(child_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static int sgm3140_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	struct sgm3140 *priv = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	del_timer_sync(&priv->powerdown_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	v4l2_flash_release(priv->v4l2_flash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static const struct of_device_id sgm3140_dt_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	{ .compatible = "sgmicro,sgm3140" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	{ /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) MODULE_DEVICE_TABLE(of, sgm3140_dt_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static struct platform_driver sgm3140_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.probe	= sgm3140_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.remove	= sgm3140_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		.name	= "sgm3140",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		.of_match_table = sgm3140_dt_match,
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) module_platform_driver(sgm3140_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) MODULE_AUTHOR("Luca Weiss <luca@z3ntu.xyz>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) MODULE_DESCRIPTION("SG Micro SGM3140 charge pump LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) MODULE_LICENSE("GPL v2");