To compile this driver as a module, choose M here: the module
will be called leds-ip30.
-config LEDS_SGM3140
- tristate "LED support for the SGM3140"
- depends on LEDS_CLASS_FLASH
- depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
- help
- This option enables support for the SGM3140 500mA Buck/Boost Charge
- Pump LED Driver.
-
config LEDS_ACER_A500
tristate "Power button LED support for Acer Iconia Tab A500"
depends on LEDS_CLASS && MFD_ACER_A500_EC
obj-$(CONFIG_LEDS_REGULATOR) += leds-regulator.o
obj-$(CONFIG_LEDS_S3C24XX) += leds-s3c24xx.o
obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
-obj-$(CONFIG_LEDS_SGM3140) += leds-sgm3140.o
obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
obj-$(CONFIG_LEDS_SYSCON) += leds-syscon.o
obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
To compile this driver as a module, choose M here: the module
will be called leds-rt8515.
+config LEDS_SGM3140
+ tristate "LED support for the SGM3140"
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ help
+ This option enables support for the SGM3140 500mA Buck/Boost Charge
+ Pump LED Driver.
+
endif # LEDS_CLASS_FLASH
obj-$(CONFIG_LEDS_MAX77693) += leds-max77693.o
obj-$(CONFIG_LEDS_RT4505) += leds-rt4505.o
obj-$(CONFIG_LEDS_RT8515) += leds-rt8515.o
+obj-$(CONFIG_LEDS_SGM3140) += leds-sgm3140.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2020 Luca Weiss <luca@z3ntu.xyz>
+
+#include <linux/gpio/consumer.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/platform_device.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+#define FLASH_TIMEOUT_DEFAULT 250000U /* 250ms */
+#define FLASH_MAX_TIMEOUT_DEFAULT 300000U /* 300ms */
+
+struct sgm3140 {
+ struct led_classdev_flash fled_cdev;
+ struct v4l2_flash *v4l2_flash;
+
+ struct timer_list powerdown_timer;
+
+ struct gpio_desc *flash_gpio;
+ struct gpio_desc *enable_gpio;
+ struct regulator *vin_regulator;
+
+ bool enabled;
+
+ /* current timeout in us */
+ u32 timeout;
+ /* maximum timeout in us */
+ u32 max_timeout;
+};
+
+static struct sgm3140 *flcdev_to_sgm3140(struct led_classdev_flash *flcdev)
+{
+ return container_of(flcdev, struct sgm3140, fled_cdev);
+}
+
+static int sgm3140_strobe_set(struct led_classdev_flash *fled_cdev, bool state)
+{
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+ int ret;
+
+ if (priv->enabled == state)
+ return 0;
+
+ if (state) {
+ ret = regulator_enable(priv->vin_regulator);
+ if (ret) {
+ dev_err(fled_cdev->led_cdev.dev,
+ "failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ gpiod_set_value_cansleep(priv->flash_gpio, 1);
+ gpiod_set_value_cansleep(priv->enable_gpio, 1);
+ mod_timer(&priv->powerdown_timer,
+ jiffies + usecs_to_jiffies(priv->timeout));
+ } else {
+ del_timer_sync(&priv->powerdown_timer);
+ gpiod_set_value_cansleep(priv->enable_gpio, 0);
+ gpiod_set_value_cansleep(priv->flash_gpio, 0);
+ ret = regulator_disable(priv->vin_regulator);
+ if (ret) {
+ dev_err(fled_cdev->led_cdev.dev,
+ "failed to disable regulator: %d\n", ret);
+ return ret;
+ }
+ }
+
+ priv->enabled = state;
+
+ return 0;
+}
+
+static int sgm3140_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
+{
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+
+ *state = timer_pending(&priv->powerdown_timer);
+
+ return 0;
+}
+
+static int sgm3140_timeout_set(struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+
+ priv->timeout = timeout;
+
+ return 0;
+}
+
+static const struct led_flash_ops sgm3140_flash_ops = {
+ .strobe_set = sgm3140_strobe_set,
+ .strobe_get = sgm3140_strobe_get,
+ .timeout_set = sgm3140_timeout_set,
+};
+
+static int sgm3140_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+ bool enable = brightness == LED_ON;
+ int ret;
+
+ if (priv->enabled == enable)
+ return 0;
+
+ if (enable) {
+ ret = regulator_enable(priv->vin_regulator);
+ if (ret) {
+ dev_err(led_cdev->dev,
+ "failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ gpiod_set_value_cansleep(priv->enable_gpio, 1);
+ } else {
+ gpiod_set_value_cansleep(priv->enable_gpio, 0);
+ ret = regulator_disable(priv->vin_regulator);
+ if (ret) {
+ dev_err(led_cdev->dev,
+ "failed to disable regulator: %d\n", ret);
+ return ret;
+ }
+ }
+
+ priv->enabled = enable;
+
+ return 0;
+}
+
+static void sgm3140_powerdown_timer(struct timer_list *t)
+{
+ struct sgm3140 *priv = from_timer(priv, t, powerdown_timer);
+
+ gpiod_set_value(priv->enable_gpio, 0);
+ gpiod_set_value(priv->flash_gpio, 0);
+ regulator_disable(priv->vin_regulator);
+
+ priv->enabled = false;
+}
+
+static void sgm3140_init_flash_timeout(struct sgm3140 *priv)
+{
+ struct led_classdev_flash *fled_cdev = &priv->fled_cdev;
+ struct led_flash_setting *s;
+
+ /* Init flash timeout setting */
+ s = &fled_cdev->timeout;
+ s->min = 1;
+ s->max = priv->max_timeout;
+ s->step = 1;
+ s->val = FLASH_TIMEOUT_DEFAULT;
+}
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+ struct led_classdev *led_cdev = &priv->fled_cdev.led_cdev;
+ struct led_flash_setting *s;
+
+ strscpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
+ sizeof(v4l2_sd_cfg->dev_name));
+
+ /* Init flash intensity setting */
+ s = &v4l2_sd_cfg->intensity;
+ s->min = 0;
+ s->max = 1;
+ s->step = 1;
+ s->val = 1;
+}
+
+#else
+static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+}
+#endif
+
+static int sgm3140_probe(struct platform_device *pdev)
+{
+ struct sgm3140 *priv;
+ struct led_classdev *led_cdev;
+ struct led_classdev_flash *fled_cdev;
+ struct led_init_data init_data = {};
+ struct fwnode_handle *child_node;
+ struct v4l2_flash_config v4l2_sd_cfg = {};
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->flash_gpio = devm_gpiod_get(&pdev->dev, "flash", GPIOD_OUT_LOW);
+ ret = PTR_ERR_OR_ZERO(priv->flash_gpio);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to request flash gpio\n");
+
+ priv->enable_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW);
+ ret = PTR_ERR_OR_ZERO(priv->enable_gpio);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to request enable gpio\n");
+
+ priv->vin_regulator = devm_regulator_get(&pdev->dev, "vin");
+ ret = PTR_ERR_OR_ZERO(priv->vin_regulator);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to request regulator\n");
+
+ child_node = fwnode_get_next_available_child_node(pdev->dev.fwnode,
+ NULL);
+ if (!child_node) {
+ dev_err(&pdev->dev,
+ "No fwnode child node found for connected LED.\n");
+ return -EINVAL;
+ }
+
+ ret = fwnode_property_read_u32(child_node, "flash-max-timeout-us",
+ &priv->max_timeout);
+ if (ret) {
+ priv->max_timeout = FLASH_MAX_TIMEOUT_DEFAULT;
+ dev_warn(&pdev->dev,
+ "flash-max-timeout-us property missing\n");
+ }
+
+ /*
+ * Set default timeout to FLASH_DEFAULT_TIMEOUT except if max_timeout
+ * from DT is lower.
+ */
+ priv->timeout = min(priv->max_timeout, FLASH_TIMEOUT_DEFAULT);
+
+ timer_setup(&priv->powerdown_timer, sgm3140_powerdown_timer, 0);
+
+ fled_cdev = &priv->fled_cdev;
+ led_cdev = &fled_cdev->led_cdev;
+
+ fled_cdev->ops = &sgm3140_flash_ops;
+
+ led_cdev->brightness_set_blocking = sgm3140_brightness_set;
+ led_cdev->max_brightness = LED_ON;
+ led_cdev->flags |= LED_DEV_CAP_FLASH;
+
+ sgm3140_init_flash_timeout(priv);
+
+ init_data.fwnode = child_node;
+
+ platform_set_drvdata(pdev, priv);
+
+ /* Register in the LED subsystem */
+ ret = devm_led_classdev_flash_register_ext(&pdev->dev,
+ fled_cdev, &init_data);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register flash device: %d\n",
+ ret);
+ goto err;
+ }
+
+ sgm3140_init_v4l2_flash_config(priv, &v4l2_sd_cfg);
+
+ /* Create V4L2 Flash subdev */
+ priv->v4l2_flash = v4l2_flash_init(&pdev->dev,
+ child_node,
+ fled_cdev, NULL,
+ &v4l2_sd_cfg);
+ if (IS_ERR(priv->v4l2_flash)) {
+ ret = PTR_ERR(priv->v4l2_flash);
+ goto err;
+ }
+
+ return ret;
+
+err:
+ fwnode_handle_put(child_node);
+ return ret;
+}
+
+static int sgm3140_remove(struct platform_device *pdev)
+{
+ struct sgm3140 *priv = platform_get_drvdata(pdev);
+
+ del_timer_sync(&priv->powerdown_timer);
+
+ v4l2_flash_release(priv->v4l2_flash);
+
+ return 0;
+}
+
+static const struct of_device_id sgm3140_dt_match[] = {
+ { .compatible = "sgmicro,sgm3140" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sgm3140_dt_match);
+
+static struct platform_driver sgm3140_driver = {
+ .probe = sgm3140_probe,
+ .remove = sgm3140_remove,
+ .driver = {
+ .name = "sgm3140",
+ .of_match_table = sgm3140_dt_match,
+ },
+};
+
+module_platform_driver(sgm3140_driver);
+
+MODULE_AUTHOR("Luca Weiss <luca@z3ntu.xyz>");
+MODULE_DESCRIPTION("SG Micro SGM3140 charge pump LED driver");
+MODULE_LICENSE("GPL v2");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2020 Luca Weiss <luca@z3ntu.xyz>
-
-#include <linux/gpio/consumer.h>
-#include <linux/led-class-flash.h>
-#include <linux/module.h>
-#include <linux/regulator/consumer.h>
-#include <linux/platform_device.h>
-
-#include <media/v4l2-flash-led-class.h>
-
-#define FLASH_TIMEOUT_DEFAULT 250000U /* 250ms */
-#define FLASH_MAX_TIMEOUT_DEFAULT 300000U /* 300ms */
-
-struct sgm3140 {
- struct led_classdev_flash fled_cdev;
- struct v4l2_flash *v4l2_flash;
-
- struct timer_list powerdown_timer;
-
- struct gpio_desc *flash_gpio;
- struct gpio_desc *enable_gpio;
- struct regulator *vin_regulator;
-
- bool enabled;
-
- /* current timeout in us */
- u32 timeout;
- /* maximum timeout in us */
- u32 max_timeout;
-};
-
-static struct sgm3140 *flcdev_to_sgm3140(struct led_classdev_flash *flcdev)
-{
- return container_of(flcdev, struct sgm3140, fled_cdev);
-}
-
-static int sgm3140_strobe_set(struct led_classdev_flash *fled_cdev, bool state)
-{
- struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
- int ret;
-
- if (priv->enabled == state)
- return 0;
-
- if (state) {
- ret = regulator_enable(priv->vin_regulator);
- if (ret) {
- dev_err(fled_cdev->led_cdev.dev,
- "failed to enable regulator: %d\n", ret);
- return ret;
- }
- gpiod_set_value_cansleep(priv->flash_gpio, 1);
- gpiod_set_value_cansleep(priv->enable_gpio, 1);
- mod_timer(&priv->powerdown_timer,
- jiffies + usecs_to_jiffies(priv->timeout));
- } else {
- del_timer_sync(&priv->powerdown_timer);
- gpiod_set_value_cansleep(priv->enable_gpio, 0);
- gpiod_set_value_cansleep(priv->flash_gpio, 0);
- ret = regulator_disable(priv->vin_regulator);
- if (ret) {
- dev_err(fled_cdev->led_cdev.dev,
- "failed to disable regulator: %d\n", ret);
- return ret;
- }
- }
-
- priv->enabled = state;
-
- return 0;
-}
-
-static int sgm3140_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
-{
- struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
-
- *state = timer_pending(&priv->powerdown_timer);
-
- return 0;
-}
-
-static int sgm3140_timeout_set(struct led_classdev_flash *fled_cdev,
- u32 timeout)
-{
- struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
-
- priv->timeout = timeout;
-
- return 0;
-}
-
-static const struct led_flash_ops sgm3140_flash_ops = {
- .strobe_set = sgm3140_strobe_set,
- .strobe_get = sgm3140_strobe_get,
- .timeout_set = sgm3140_timeout_set,
-};
-
-static int sgm3140_brightness_set(struct led_classdev *led_cdev,
- enum led_brightness brightness)
-{
- struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
- struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
- bool enable = brightness == LED_ON;
- int ret;
-
- if (priv->enabled == enable)
- return 0;
-
- if (enable) {
- ret = regulator_enable(priv->vin_regulator);
- if (ret) {
- dev_err(led_cdev->dev,
- "failed to enable regulator: %d\n", ret);
- return ret;
- }
- gpiod_set_value_cansleep(priv->enable_gpio, 1);
- } else {
- gpiod_set_value_cansleep(priv->enable_gpio, 0);
- ret = regulator_disable(priv->vin_regulator);
- if (ret) {
- dev_err(led_cdev->dev,
- "failed to disable regulator: %d\n", ret);
- return ret;
- }
- }
-
- priv->enabled = enable;
-
- return 0;
-}
-
-static void sgm3140_powerdown_timer(struct timer_list *t)
-{
- struct sgm3140 *priv = from_timer(priv, t, powerdown_timer);
-
- gpiod_set_value(priv->enable_gpio, 0);
- gpiod_set_value(priv->flash_gpio, 0);
- regulator_disable(priv->vin_regulator);
-
- priv->enabled = false;
-}
-
-static void sgm3140_init_flash_timeout(struct sgm3140 *priv)
-{
- struct led_classdev_flash *fled_cdev = &priv->fled_cdev;
- struct led_flash_setting *s;
-
- /* Init flash timeout setting */
- s = &fled_cdev->timeout;
- s->min = 1;
- s->max = priv->max_timeout;
- s->step = 1;
- s->val = FLASH_TIMEOUT_DEFAULT;
-}
-
-#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
-static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
- struct v4l2_flash_config *v4l2_sd_cfg)
-{
- struct led_classdev *led_cdev = &priv->fled_cdev.led_cdev;
- struct led_flash_setting *s;
-
- strscpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
- sizeof(v4l2_sd_cfg->dev_name));
-
- /* Init flash intensity setting */
- s = &v4l2_sd_cfg->intensity;
- s->min = 0;
- s->max = 1;
- s->step = 1;
- s->val = 1;
-}
-
-#else
-static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
- struct v4l2_flash_config *v4l2_sd_cfg)
-{
-}
-#endif
-
-static int sgm3140_probe(struct platform_device *pdev)
-{
- struct sgm3140 *priv;
- struct led_classdev *led_cdev;
- struct led_classdev_flash *fled_cdev;
- struct led_init_data init_data = {};
- struct fwnode_handle *child_node;
- struct v4l2_flash_config v4l2_sd_cfg = {};
- int ret;
-
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- priv->flash_gpio = devm_gpiod_get(&pdev->dev, "flash", GPIOD_OUT_LOW);
- ret = PTR_ERR_OR_ZERO(priv->flash_gpio);
- if (ret)
- return dev_err_probe(&pdev->dev, ret,
- "Failed to request flash gpio\n");
-
- priv->enable_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW);
- ret = PTR_ERR_OR_ZERO(priv->enable_gpio);
- if (ret)
- return dev_err_probe(&pdev->dev, ret,
- "Failed to request enable gpio\n");
-
- priv->vin_regulator = devm_regulator_get(&pdev->dev, "vin");
- ret = PTR_ERR_OR_ZERO(priv->vin_regulator);
- if (ret)
- return dev_err_probe(&pdev->dev, ret,
- "Failed to request regulator\n");
-
- child_node = fwnode_get_next_available_child_node(pdev->dev.fwnode,
- NULL);
- if (!child_node) {
- dev_err(&pdev->dev,
- "No fwnode child node found for connected LED.\n");
- return -EINVAL;
- }
-
- ret = fwnode_property_read_u32(child_node, "flash-max-timeout-us",
- &priv->max_timeout);
- if (ret) {
- priv->max_timeout = FLASH_MAX_TIMEOUT_DEFAULT;
- dev_warn(&pdev->dev,
- "flash-max-timeout-us property missing\n");
- }
-
- /*
- * Set default timeout to FLASH_DEFAULT_TIMEOUT except if max_timeout
- * from DT is lower.
- */
- priv->timeout = min(priv->max_timeout, FLASH_TIMEOUT_DEFAULT);
-
- timer_setup(&priv->powerdown_timer, sgm3140_powerdown_timer, 0);
-
- fled_cdev = &priv->fled_cdev;
- led_cdev = &fled_cdev->led_cdev;
-
- fled_cdev->ops = &sgm3140_flash_ops;
-
- led_cdev->brightness_set_blocking = sgm3140_brightness_set;
- led_cdev->max_brightness = LED_ON;
- led_cdev->flags |= LED_DEV_CAP_FLASH;
-
- sgm3140_init_flash_timeout(priv);
-
- init_data.fwnode = child_node;
-
- platform_set_drvdata(pdev, priv);
-
- /* Register in the LED subsystem */
- ret = devm_led_classdev_flash_register_ext(&pdev->dev,
- fled_cdev, &init_data);
- if (ret) {
- dev_err(&pdev->dev, "Failed to register flash device: %d\n",
- ret);
- goto err;
- }
-
- sgm3140_init_v4l2_flash_config(priv, &v4l2_sd_cfg);
-
- /* Create V4L2 Flash subdev */
- priv->v4l2_flash = v4l2_flash_init(&pdev->dev,
- child_node,
- fled_cdev, NULL,
- &v4l2_sd_cfg);
- if (IS_ERR(priv->v4l2_flash)) {
- ret = PTR_ERR(priv->v4l2_flash);
- goto err;
- }
-
- return ret;
-
-err:
- fwnode_handle_put(child_node);
- return ret;
-}
-
-static int sgm3140_remove(struct platform_device *pdev)
-{
- struct sgm3140 *priv = platform_get_drvdata(pdev);
-
- del_timer_sync(&priv->powerdown_timer);
-
- v4l2_flash_release(priv->v4l2_flash);
-
- return 0;
-}
-
-static const struct of_device_id sgm3140_dt_match[] = {
- { .compatible = "sgmicro,sgm3140" },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, sgm3140_dt_match);
-
-static struct platform_driver sgm3140_driver = {
- .probe = sgm3140_probe,
- .remove = sgm3140_remove,
- .driver = {
- .name = "sgm3140",
- .of_match_table = sgm3140_dt_match,
- },
-};
-
-module_platform_driver(sgm3140_driver);
-
-MODULE_AUTHOR("Luca Weiss <luca@z3ntu.xyz>");
-MODULE_DESCRIPTION("SG Micro SGM3140 charge pump LED driver");
-MODULE_LICENSE("GPL v2");
projects / linux.git / commitdiff