--- zzzz-none-000/linux-3.10.107/drivers/leds/leds-lp55xx-common.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/leds/leds-lp55xx-common.c	2021-02-04 17:41:59.000000000 +0000
@@ -19,6 +19,9 @@
 #include <linux/leds.h>
 #include <linux/module.h>
 #include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
 
 #include "leds-lp55xx-common.h"
 
@@ -124,15 +127,12 @@
 		lp55xx_store_current);
 static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL);
 
-static struct attribute *lp55xx_led_attributes[] = {
+static struct attribute *lp55xx_led_attrs[] = {
 	&dev_attr_led_current.attr,
 	&dev_attr_max_current.attr,
 	NULL,
 };
-
-static struct attribute_group lp55xx_led_attr_group = {
-	.attrs = lp55xx_led_attributes
-};
+ATTRIBUTE_GROUPS(lp55xx_led);
 
 static void lp55xx_set_brightness(struct led_classdev *cdev,
 			     enum led_brightness brightness)
@@ -164,6 +164,7 @@
 	led->led_current = pdata->led_config[chan].led_current;
 	led->max_current = pdata->led_config[chan].max_current;
 	led->chan_nr = pdata->led_config[chan].chan_nr;
+	led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
 
 	if (led->chan_nr >= max_channel) {
 		dev_err(dev, "Use channel numbers between 0 and %d\n",
@@ -172,6 +173,7 @@
 	}
 
 	led->cdev.brightness_set = lp55xx_set_brightness;
+	led->cdev.groups = lp55xx_led_groups;
 
 	if (pdata->led_config[chan].name) {
 		led->cdev.name = pdata->led_config[chan].name;
@@ -181,24 +183,12 @@
 		led->cdev.name = name;
 	}
 
-	/*
-	 * register led class device for each channel and
-	 * add device attributes
-	 */
-
 	ret = led_classdev_register(dev, &led->cdev);
 	if (ret) {
 		dev_err(dev, "led register err: %d\n", ret);
 		return ret;
 	}
 
-	ret = sysfs_create_group(&led->cdev.dev->kobj, &lp55xx_led_attr_group);
-	if (ret) {
-		dev_err(dev, "led sysfs err: %d\n", ret);
-		led_classdev_unregister(&led->cdev);
-		return ret;
-	}
-
 	return 0;
 }
 
@@ -206,6 +196,7 @@
 {
 	struct lp55xx_chip *chip = context;
 	struct device *dev = &chip->cl->dev;
+	enum lp55xx_engine_index idx = chip->engine_idx;
 
 	if (!fw) {
 		dev_err(dev, "firmware request failed\n");
@@ -215,6 +206,7 @@
 	/* handling firmware data is chip dependent */
 	mutex_lock(&chip->lock);
 
+	chip->engines[idx - 1].mode = LP55XX_ENGINE_LOAD;
 	chip->fw = fw;
 	if (chip->cfg->firmware_cb)
 		chip->cfg->firmware_cb(chip);
@@ -231,7 +223,7 @@
 	const char *name = chip->cl->name;
 	struct device *dev = &chip->cl->dev;
 
-	return request_firmware_nowait(THIS_MODULE, true, name, dev,
+	return request_firmware_nowait(THIS_MODULE, false, name, dev,
 				GFP_KERNEL, chip, lp55xx_firmware_loaded);
 }
 
@@ -405,18 +397,18 @@
 	if (!pdata || !cfg)
 		return -EINVAL;
 
-	if (pdata->setup_resources) {
-		ret = pdata->setup_resources();
+	if (gpio_is_valid(pdata->enable_gpio)) {
+		ret = devm_gpio_request_one(dev, pdata->enable_gpio,
+					    GPIOF_DIR_OUT, "lp5523_enable");
 		if (ret < 0) {
-			dev_err(dev, "setup resoure err: %d\n", ret);
+			dev_err(dev, "could not acquire enable gpio (err=%d)\n",
+				ret);
 			goto err;
 		}
-	}
 
-	if (pdata->enable) {
-		pdata->enable(0);
+		gpio_set_value(pdata->enable_gpio, 0);
 		usleep_range(1000, 2000); /* Keep enable down at least 1ms */
-		pdata->enable(1);
+		gpio_set_value(pdata->enable_gpio, 1);
 		usleep_range(1000, 2000); /* 500us abs min. */
 	}
 
@@ -457,11 +449,8 @@
 	if (chip->clk)
 		clk_disable_unprepare(chip->clk);
 
-	if (pdata->enable)
-		pdata->enable(0);
-
-	if (pdata->release_resources)
-		pdata->release_resources();
+	if (gpio_is_valid(pdata->enable_gpio))
+		gpio_set_value(pdata->enable_gpio, 0);
 }
 EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
 
@@ -554,6 +543,56 @@
 }
 EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
 
+struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
+						      struct device_node *np)
+{
+	struct device_node *child;
+	struct lp55xx_platform_data *pdata;
+	struct lp55xx_led_config *cfg;
+	int num_channels;
+	int i = 0;
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	num_channels = of_get_child_count(np);
+	if (num_channels == 0) {
+		dev_err(dev, "no LED channels\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	cfg = devm_kzalloc(dev, sizeof(*cfg) * num_channels, GFP_KERNEL);
+	if (!cfg)
+		return ERR_PTR(-ENOMEM);
+
+	pdata->led_config = &cfg[0];
+	pdata->num_channels = num_channels;
+
+	for_each_child_of_node(np, child) {
+		cfg[i].chan_nr = i;
+
+		of_property_read_string(child, "chan-name", &cfg[i].name);
+		of_property_read_u8(child, "led-cur", &cfg[i].led_current);
+		of_property_read_u8(child, "max-cur", &cfg[i].max_current);
+		cfg[i].default_trigger =
+			of_get_property(child, "linux,default-trigger", NULL);
+
+		i++;
+	}
+
+	of_property_read_string(np, "label", &pdata->label);
+	of_property_read_u8(np, "clock-mode", &pdata->clock_mode);
+
+	pdata->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
+
+	/* LP8501 specific */
+	of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel);
+
+	return pdata;
+}
+EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata);
+
 MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
 MODULE_DESCRIPTION("LP55xx Common Driver");
 MODULE_LICENSE("GPL");