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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/leds/leds-tca6507.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * leds-tca6507
34  *
....@@ -68,23 +69,6 @@
6869  * defaulted.  Similarly the banks know if each time was explicit or a
6970  * default.  Defaults are permitted to be changed freely - they are
7071  * not recognised when matching.
71
- *
72
- *
73
- * An led-tca6507 device must be provided with platform data or
74
- * configured via devicetree.
75
- *
76
- * The platform-data lists for each output: the name, default trigger,
77
- * and whether the signal is being used as a GPIO rather than an LED.
78
- * 'struct led_plaform_data' is used for this.  If 'name' is NULL, the
79
- * output isn't used.  If 'flags' is TCA6507_MAKE_GPIO, the output is
80
- * a GPO.  The "struct led_platform_data" can be embedded in a "struct
81
- * tca6507_platform_data" which adds a 'gpio_base' for the GPIOs, and
82
- * a 'setup' callback which is called once the GPIOs are available.
83
- *
84
- * When configured via devicetree there is one child for each output.
85
- * The "reg" determines the output number and "compatible" determines
86
- * whether it is an LED or a GPIO.  "linux,default-trigger" can set a
87
- * default trigger.
8872  */
8973 
9074 #include <linux/module.h>
....@@ -92,10 +76,9 @@
9276 #include <linux/leds.h>
9377 #include <linux/err.h>
9478 #include <linux/i2c.h>
95
-#include <linux/gpio.h>
79
+#include <linux/gpio/driver.h>
80
+#include <linux/property.h>
9681 #include <linux/workqueue.h>
97
-#include <linux/leds-tca6507.h>
98
-#include <linux/of.h>
9982 
10083 /* LED select registers determine the source that drives LED outputs */
10184 #define TCA6507_LS_LED_OFF	0x0	/* Output HI-Z (off) */
....@@ -106,6 +89,15 @@
10689 #define TCA6507_LS_LED_MIR	0x5	/* Output LOW with Master Intensity */
10790 #define TCA6507_LS_BLINK0	0x6	/* Blink at Bank0 rate */
10891 #define TCA6507_LS_BLINK1	0x7	/* Blink at Bank1 rate */
92
+
93
+struct tca6507_platform_data {
94
+	struct led_platform_data leds;
95
+#ifdef CONFIG_GPIOLIB
96
+	int gpio_base;
97
+#endif
98
+};
99
+
100
+#define	TCA6507_MAKE_GPIO 1
109101 
110102 enum {
111103 	BANK0,
....@@ -188,7 +180,6 @@
188180 	} leds[NUM_LEDS];
189181 #ifdef CONFIG_GPIOLIB
190182 	struct gpio_chip		gpio;
191
-	const char			*gpio_name[NUM_LEDS];
192183 	int				gpio_map[NUM_LEDS];
193184 #endif
194185 };
....@@ -627,7 +618,7 @@
627618 	return 0;
628619 }
629620 
630
-static int tca6507_probe_gpios(struct i2c_client *client,
621
+static int tca6507_probe_gpios(struct device *dev,
631622 			       struct tca6507_chip *tca,
632623 			       struct tca6507_platform_data *pdata)
633624 {
....@@ -638,7 +629,6 @@
638629 	for (i = 0; i < NUM_LEDS; i++)
639630 		if (pdata->leds.leds[i].name && pdata->leds.leds[i].flags) {
640631 			/* Configure as a gpio */
641
-			tca->gpio_name[gpios] = pdata->leds.leds[i].name;
642632 			tca->gpio_map[gpios] = i;
643633 			gpios++;
644634 		}
....@@ -647,23 +637,20 @@
647637 		return 0;
648638 
649639 	tca->gpio.label = "gpio-tca6507";
650
-	tca->gpio.names = tca->gpio_name;
651640 	tca->gpio.ngpio = gpios;
652641 	tca->gpio.base = pdata->gpio_base;
653642 	tca->gpio.owner = THIS_MODULE;
654643 	tca->gpio.direction_output = tca6507_gpio_direction_output;
655644 	tca->gpio.set = tca6507_gpio_set_value;
656
-	tca->gpio.parent = &client->dev;
645
+	tca->gpio.parent = dev;
657646 #ifdef CONFIG_OF_GPIO
658
-	tca->gpio.of_node = of_node_get(client->dev.of_node);
647
+	tca->gpio.of_node = of_node_get(dev_of_node(dev));
659648 #endif
660649 	err = gpiochip_add_data(&tca->gpio, tca);
661650 	if (err) {
662651 		tca->gpio.ngpio = 0;
663652 		return err;
664653 	}
665
-	if (pdata->setup)
666
-		pdata->setup(tca->gpio.base, tca->gpio.ngpio);
667654 	return 0;
668655 }
669656 
....@@ -673,7 +660,7 @@
673660 		gpiochip_remove(&tca->gpio);
674661 }
675662 #else /* CONFIG_GPIOLIB */
676
-static int tca6507_probe_gpios(struct i2c_client *client,
663
+static int tca6507_probe_gpios(struct device *dev,
677664 			       struct tca6507_chip *tca,
678665 			       struct tca6507_platform_data *pdata)
679666 {
....@@ -684,44 +671,51 @@
684671 }
685672 #endif /* CONFIG_GPIOLIB */
686673 
687
-#ifdef CONFIG_OF
688674 static struct tca6507_platform_data *
689
-tca6507_led_dt_init(struct i2c_client *client)
675
+tca6507_led_dt_init(struct device *dev)
690676 {
691
-	struct device_node *np = client->dev.of_node, *child;
692677 	struct tca6507_platform_data *pdata;
678
+	struct fwnode_handle *child;
693679 	struct led_info *tca_leds;
694680 	int count;
695681 
696
-	count = of_get_child_count(np);
682
+	count = device_get_child_node_count(dev);
697683 	if (!count || count > NUM_LEDS)
698684 		return ERR_PTR(-ENODEV);
699685 
700
-	tca_leds = devm_kcalloc(&client->dev,
701
-			NUM_LEDS, sizeof(struct led_info), GFP_KERNEL);
686
+	tca_leds = devm_kcalloc(dev, NUM_LEDS, sizeof(struct led_info),
687
+				GFP_KERNEL);
702688 	if (!tca_leds)
703689 		return ERR_PTR(-ENOMEM);
704690 
705
-	for_each_child_of_node(np, child) {
691
+	device_for_each_child_node(dev, child) {
706692 		struct led_info led;
707693 		u32 reg;
708694 		int ret;
709695 
710
-		led.name =
711
-			of_get_property(child, "label", NULL) ? : child->name;
712
-		led.default_trigger =
713
-			of_get_property(child, "linux,default-trigger", NULL);
696
+		if (fwnode_property_read_string(child, "label", &led.name))
697
+			led.name = fwnode_get_name(child);
698
+
699
+		if (fwnode_property_read_string(child, "linux,default-trigger",
700
+						&led.default_trigger))
701
+			led.default_trigger = NULL;
702
+
714703 		led.flags = 0;
715
-		if (of_property_match_string(child, "compatible", "gpio") >= 0)
704
+		if (fwnode_property_match_string(child, "compatible",
705
+						 "gpio") >= 0)
716706 			led.flags |= TCA6507_MAKE_GPIO;
717
-		ret = of_property_read_u32(child, "reg", &reg);
718
-		if (ret != 0 || reg >= NUM_LEDS)
719
-			continue;
707
+
708
+		ret = fwnode_property_read_u32(child, "reg", &reg);
709
+		if (ret || reg >= NUM_LEDS) {
710
+			fwnode_handle_put(child);
711
+			return ERR_PTR(ret ? : -EINVAL);
712
+		}
720713 
721714 		tca_leds[reg] = led;
722715 	}
723
-	pdata = devm_kzalloc(&client->dev,
724
-			sizeof(struct tca6507_platform_data), GFP_KERNEL);
716
+
717
+	pdata = devm_kzalloc(dev, sizeof(struct tca6507_platform_data),
718
+			     GFP_KERNEL);
725719 	if (!pdata)
726720 		return ERR_PTR(-ENOMEM);
727721 
....@@ -730,48 +724,37 @@
730724 #ifdef CONFIG_GPIOLIB
731725 	pdata->gpio_base = -1;
732726 #endif
727
+
733728 	return pdata;
734729 }
735730 
736
-static const struct of_device_id of_tca6507_leds_match[] = {
731
+static const struct of_device_id __maybe_unused of_tca6507_leds_match[] = {
737732 	{ .compatible = "ti,tca6507", },
738733 	{},
739734 };
740735 MODULE_DEVICE_TABLE(of, of_tca6507_leds_match);
741736 
742
-#else
743
-static struct tca6507_platform_data *
744
-tca6507_led_dt_init(struct i2c_client *client)
745
-{
746
-	return ERR_PTR(-ENODEV);
747
-}
748
-
749
-#endif
750
-
751737 static int tca6507_probe(struct i2c_client *client,
752738 		const struct i2c_device_id *id)
753739 {
754
-	struct tca6507_chip *tca;
740
+	struct device *dev = &client->dev;
755741 	struct i2c_adapter *adapter;
742
+	struct tca6507_chip *tca;
756743 	struct tca6507_platform_data *pdata;
757744 	int err;
758745 	int i = 0;
759746 
760
-	adapter = to_i2c_adapter(client->dev.parent);
761
-	pdata = dev_get_platdata(&client->dev);
747
+	adapter = client->adapter;
762748 
763749 	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
764750 		return -EIO;
765751 
766
-	if (!pdata || pdata->leds.num_leds != NUM_LEDS) {
767
-		pdata = tca6507_led_dt_init(client);
768
-		if (IS_ERR(pdata)) {
769
-			dev_err(&client->dev, "Need %d entries in platform-data list\n",
770
-				NUM_LEDS);
771
-			return PTR_ERR(pdata);
772
-		}
752
+	pdata = tca6507_led_dt_init(dev);
753
+	if (IS_ERR(pdata)) {
754
+		dev_err(dev, "Need %d entries in platform-data list\n", NUM_LEDS);
755
+		return PTR_ERR(pdata);
773756 	}
774
-	tca = devm_kzalloc(&client->dev, sizeof(*tca), GFP_KERNEL);
757
+	tca = devm_kzalloc(dev, sizeof(*tca), GFP_KERNEL);
775758 	if (!tca)
776759 		return -ENOMEM;
777760 
....@@ -792,13 +775,12 @@
792775 			l->led_cdev.brightness_set = tca6507_brightness_set;
793776 			l->led_cdev.blink_set = tca6507_blink_set;
794777 			l->bank = -1;
795
-			err = led_classdev_register(&client->dev,
796
-						    &l->led_cdev);
778
+			err = led_classdev_register(dev, &l->led_cdev);
797779 			if (err < 0)
798780 				goto exit;
799781 		}
800782 	}
801
-	err = tca6507_probe_gpios(client, tca, pdata);
783
+	err = tca6507_probe_gpios(dev, tca, pdata);
802784 	if (err)
803785 		goto exit;
804786 	/* set all registers to known state - zero */