leds: pca963x: register LEDs immediately after parsing, get rid of platdata

Register LEDs immediately after parsing their properties.
This allows us to get rid of platdata, and since no one in tree uses
header linux/platform_data/leds-pca963x.h, remove it.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Peter Meerwald <p.meerwald@bct-electronic.com>
Cc: Ricardo Ribalda <ribalda@kernel.org>
Cc: Zahari Petkov <zahari@balena.io>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-pca963x.c

@@ -32,7 +32,6 @@
 #include <linux/property.h>
 #include <linux/slab.h>
 #include <linux/of.h>
-#include <linux/platform_data/leds-pca963x.h>
 
 /* LED select registers determine the source that drives LED outputs */
 #define PCA963X_LED_OFF		0x0	/* LED driver off */
@@ -102,7 +101,6 @@ struct pca963x_led {
 	struct pca963x *chip;
 	struct led_classdev led_cdev;
 	int led_num; /* 0 .. 15 potentially */
-	char name[32];
 	u8 gdc;
 	u8 gfrq;
 };
@@ -284,72 +282,85 @@ static int pca963x_blink_set(struct led_classdev *led_cdev,
 	return 0;
 }
 
-static struct pca963x_platform_data *
-pca963x_get_pdata(struct device *dev, struct pca963x_chipdef *chipdef)
+static int pca963x_register_leds(struct i2c_client *client,
+				 struct pca963x *chip)
 {
-	struct pca963x_platform_data *pdata;
-	struct led_info *pca963x_leds;
+	struct pca963x_chipdef *chipdef = chip->chipdef;
+	struct pca963x_led *led = chip->leds;
+	struct device *dev = &client->dev;
 	struct fwnode_handle *child;
-	int count;
-
-	count = device_get_child_node_count(dev);
-	if (!count || count > chipdef->n_leds)
-		return ERR_PTR(-ENODEV);
-
-	pca963x_leds = devm_kcalloc(dev, chipdef->n_leds,
-				    sizeof(struct led_info), GFP_KERNEL);
-	if (!pca963x_leds)
-		return ERR_PTR(-ENOMEM);
-
-	device_for_each_child_node(dev, child) {
-		struct led_info led = {};
+	const char *name;
+	char label[64];
+	bool hw_blink;
+	s32 mode2;
 	u32 reg;
-		int res;
-
-		res = fwnode_property_read_u32(child, "reg", &reg);
-		if ((res != 0) || (reg >= chipdef->n_leds))
-			continue;
-
-		res = fwnode_property_read_string(child, "label", &led.name);
-		if ((res != 0) && is_of_node(child))
-			led.name = to_of_node(child)->name;
+	int ret;
 
-		fwnode_property_read_string(child, "linux,default-trigger",
-					    &led.default_trigger);
+	if (device_property_read_u32(dev, "nxp,period-scale",
+				     &chipdef->scaling))
+		chipdef->scaling = 1000;
 
-		pca963x_leds[reg] = led;
-	}
-	pdata = devm_kzalloc(dev, sizeof(struct pca963x_platform_data),
-			     GFP_KERNEL);
-	if (!pdata)
-		return ERR_PTR(-ENOMEM);
+	hw_blink = device_property_read_bool(dev, "nxp,hw-blink");
 
-	pdata->leds.leds = pca963x_leds;
-	pdata->leds.num_leds = chipdef->n_leds;
+	mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
+	if (mode2 < 0)
+		return mode2;
 
 	/* default to open-drain unless totem pole (push-pull) is specified */
 	if (device_property_read_bool(dev, "nxp,totem-pole"))
-		pdata->outdrv = PCA963X_TOTEM_POLE;
+		mode2 |= PCA963X_MODE2_OUTDRV;
 	else
-		pdata->outdrv = PCA963X_OPEN_DRAIN;
+		mode2 &= ~PCA963X_MODE2_OUTDRV;
 
-	/* default to software blinking unless hardware blinking is specified */
-	if (device_property_read_bool(dev, "nxp,hw-blink"))
-		pdata->blink_type = PCA963X_HW_BLINK;
+	/* default to non-inverted output, unless inverted is specified */
+	if (device_property_read_bool(dev, "nxp,inverted-out"))
+		mode2 |= PCA963X_MODE2_INVRT;
 	else
-		pdata->blink_type = PCA963X_SW_BLINK;
+		mode2 &= ~PCA963X_MODE2_INVRT;
 
-	if (device_property_read_u32(dev, "nxp,period-scale",
-				     &chipdef->scaling))
-		chipdef->scaling = 1000;
+	ret = i2c_smbus_write_byte_data(client, PCA963X_MODE2, mode2);
+	if (ret < 0)
+		return ret;
 
-	/* default to non-inverted output, unless inverted is specified */
-	if (device_property_read_bool(dev, "nxp,inverted-out"))
-		pdata->dir = PCA963X_INVERTED;
+	device_for_each_child_node(dev, child) {
+		ret = fwnode_property_read_u32(child, "reg", &reg);
+		if (ret || reg >= chipdef->n_leds) {
+			dev_err(dev, "Invalid 'reg' property for node %pfw\n",
+				child);
+			ret = -EINVAL;
+			goto err;
+		}
+
+		ret = fwnode_property_read_string(child, "label", &name);
+		if (!fwnode_property_read_string(child, "label", &name))
+			snprintf(label, sizeof(label), "pca963x:%s", name);
 		else
-		pdata->dir = PCA963X_NORMAL;
+			snprintf(label, sizeof(label), "pca963x::");
+
+		fwnode_property_read_string(child, "linux,default-trigger",
+					    &led->led_cdev.default_trigger);
 
-	return pdata;
+		led->led_num = reg;
+		led->chip = chip;
+		led->led_cdev.name = label;
+		led->led_cdev.brightness_set_blocking = pca963x_led_set;
+		if (hw_blink)
+			led->led_cdev.blink_set = pca963x_blink_set;
+
+		ret = devm_led_classdev_register(dev, &led->led_cdev);
+		if (ret) {
+			dev_err(dev, "Failed to register LED for node %pfw\n",
+				child);
+			goto err;
+		}
+
+		++led;
+	}
+
+	return 0;
+err:
+	fwnode_handle_put(child);
+	return ret;
 }
 
 static const struct of_device_id of_pca963x_match[] = {
@@ -366,30 +377,19 @@ static int pca963x_probe(struct i2c_client *client,
 {
 	struct device *dev = &client->dev;
 	struct pca963x_chipdef *chipdef;
-	struct pca963x_platform_data *pdata;
 	struct pca963x *chip;
-	int i, err;
+	int i, count;
 
 	chipdef = &pca963x_chipdefs[id->driver_data];
-	pdata = dev_get_platdata(dev);
-
-	if (!pdata) {
-		pdata = pca963x_get_pdata(dev, chipdef);
-		if (IS_ERR(pdata)) {
-			dev_warn(dev, "could not parse configuration\n");
-			pdata = NULL;
-		}
-	}
 
-	if (pdata && (pdata->leds.num_leds < 1 ||
-		      pdata->leds.num_leds > chipdef->n_leds)) {
-		dev_err(dev, "board info must claim 1-%d LEDs",
-			chipdef->n_leds);
+	count = device_get_child_node_count(dev);
+	if (!count || count > chipdef->n_leds) {
+		dev_err(dev, "Node %pfw must define between 1 and %d LEDs\n",
+			dev_fwnode(dev), chipdef->n_leds);
 		return -EINVAL;
 	}
 
-	chip = devm_kzalloc(dev, struct_size(chip, leds, chipdef->n_leds),
-			    GFP_KERNEL);
+	chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL);
 	if (!chip)
 		return -ENOMEM;
 
@@ -403,56 +403,10 @@ static int pca963x_probe(struct i2c_client *client,
 	for (i = 0; i < chipdef->n_leds / 4; i++)
 		i2c_smbus_write_byte_data(client, chipdef->ledout_base + i, 0x00);
 
-	for (i = 0; i < chipdef->n_leds; i++) {
-		struct pca963x_led *led = &chip->leds[i];
-
-		led->led_num = i;
-		led->chip = chip;
-
-		/* Platform data can specify LED names and default triggers */
-		if (pdata && i < pdata->leds.num_leds) {
-			if (pdata->leds.leds[i].name)
-				snprintf(led->name,
-					 sizeof(led->name), "pca963x:%s",
-					 pdata->leds.leds[i].name);
-			if (pdata->leds.leds[i].default_trigger)
-				led->led_cdev.default_trigger =
-					pdata->leds.leds[i].default_trigger;
-		}
-		if (!pdata || i >= pdata->leds.num_leds ||
-						!pdata->leds.leds[i].name)
-			snprintf(led->name, sizeof(led->name),
-				 "pca963x:%d:%.2x:%d", client->adapter->nr,
-				 client->addr, i);
-
-		led->led_cdev.name = led->name;
-		led->led_cdev.brightness_set_blocking = pca963x_led_set;
-
-		if (pdata && pdata->blink_type == PCA963X_HW_BLINK)
-			led->led_cdev.blink_set = pca963x_blink_set;
-
-		err = devm_led_classdev_register(dev, &led->led_cdev);
-		if (err < 0)
-			return err;
-	}
-
 	/* Disable LED all-call address, and power down initially */
 	i2c_smbus_write_byte_data(client, PCA963X_MODE1, BIT(4));
 
-	if (pdata) {
-		u8 mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
-		/* Configure output: open-drain or totem pole (push-pull) */
-		if (pdata->outdrv == PCA963X_OPEN_DRAIN)
-			mode2 &= ~PCA963X_MODE2_OUTDRV;
-		else
-			mode2 |= PCA963X_MODE2_OUTDRV;
-		/* Configure direction: normal or inverted */
-		if (pdata->dir == PCA963X_INVERTED)
-			mode2 |= PCA963X_MODE2_INVRT;
-		i2c_smbus_write_byte_data(client, PCA963X_MODE2, mode2);
-	}
-
-	return 0;
+	return pca963x_register_leds(client, chip);
 }
 
 static struct i2c_driver pca963x_driver = {

include/linux/platform_data/leds-pca963x.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * PCA963X LED chip driver.
- *
- * Copyright 2012 bct electronic GmbH
- * Copyright 2013 Qtechnology A/S
- */
-
-#ifndef __LINUX_PCA963X_H
-#define __LINUX_PCA963X_H
-#include <linux/leds.h>
-
-enum pca963x_outdrv {
-	PCA963X_OPEN_DRAIN,
-	PCA963X_TOTEM_POLE, /* aka push-pull */
-};
-
-enum pca963x_blink_type {
-	PCA963X_SW_BLINK,
-	PCA963X_HW_BLINK,
-};
-
-enum pca963x_direction {
-	PCA963X_NORMAL,
-	PCA963X_INVERTED,
-};
-
-struct pca963x_platform_data {
-	struct led_platform_data leds;
-	enum pca963x_outdrv outdrv;
-	enum pca963x_blink_type blink_type;
-	enum pca963x_direction dir;
-};
-
-#endif /* __LINUX_PCA963X_H*/