The binding details are described in an earlier commit that adds the
documentation.
Signed-off-by: Daniel Mack <daniel@xxxxxxxxxx>
---
drivers/leds/leds-lt3593.c | 70 ++++++++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/drivers/leds/leds-lt3593.c b/drivers/leds/leds-lt3593.c
index a096ee64cbbb..2e35a4a4c571 100644
--- a/drivers/leds/leds-lt3593.c
+++ b/drivers/leds/leds-lt3593.c
@@ -24,8 +24,11 @@
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <uapi/linux/uleds.h>
struct lt3593_led_data {
+ char name[LED_MAX_NAME_SIZE];
struct led_classdev cdev;
struct gpio_desc *gpiod;
};
@@ -120,22 +123,89 @@ static int lt3593_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct lt3593_led_data *led_data;
+ struct fwnode_handle *child;
+ int ret, state = LEDS_GPIO_DEFSTATE_OFF;
+ enum gpiod_flags flags = GPIOD_OUT_LOW;
+ const char *tmp;
if (dev_get_platdata(dev)) {
led_data = lt3593_led_probe_pdata(dev);
if (IS_ERR(led_data))
return PTR_ERR(led_data);
+
+ goto out;
}
+ if (!dev->of_node)
+ return -ENODEV;
+
+ led_data = devm_kzalloc(dev, sizeof(*led_data), GFP_KERNEL);
+ if (!led_data)
+ return -ENOMEM;
+
+ if (device_get_child_node_count(dev) != 1) {
+ dev_err(dev, "Device must have exactly one LED sub-node.");
+ return -EINVAL;
+ }
+
+ led_data->gpiod = devm_gpiod_get(dev, "lltc,ctrl", 0);
+ if (IS_ERR(led_data->gpiod))
+ return PTR_ERR(led_data->gpiod);
+
+ child = device_get_next_child_node(dev, NULL);
+
+ ret = fwnode_property_read_string(child, "label", &tmp);
+ if (ret < 0)
+ snprintf(led_data->name, sizeof(led_data->name),
+ "lt3593::");
+ else
+ snprintf(led_data->name, sizeof(led_data->name),
+ "lt3593:%s", tmp);
+
+ fwnode_property_read_string(child, "linux,default-trigger",
+ &led_data->cdev.default_trigger);
+
+ if (!fwnode_property_read_string(child, "default-state", &tmp)) {
+ if (!strcmp(tmp, "keep")) {
+ state = LEDS_GPIO_DEFSTATE_KEEP;
+ flags = GPIOD_ASIS;
+ } else if (!strcmp(tmp, "on")) {
+ state = LEDS_GPIO_DEFSTATE_ON;
+ flags = GPIOD_OUT_HIGH;
+ }
+ }
+
+ led_data->cdev.name = led_data->name;
+ led_data->cdev.brightness_set_blocking = lt3593_led_set;
+ led_data->cdev.brightness = state ? LED_FULL : LED_OFF;
+
+ ret = devm_led_classdev_register(dev, &led_data->cdev);
+ if (ret < 0) {
+ fwnode_handle_put(child);
+ return ret;
+ }
+
+ led_data->cdev.dev->of_node = dev->of_node;
+
+out:
platform_set_drvdata(pdev, led_data);
return 0;
}
+#ifdef CONFIG_OF
+static const struct of_device_id of_lt3593_leds_match[] = {
+ { .compatible = "lltc,lt3593", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lt3593_leds_match);
+#endif
+
static struct platform_driver lt3593_led_driver = {
.probe = lt3593_led_probe,
.driver = {
.name = "leds-lt3593",
+ .of_match_table = of_match_ptr(of_lt3593_leds_match),
},
};
--
2.17.1
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