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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/leds/leds-lp55xx-common.c
....@@ -1,13 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * LP5521/LP5523/LP55231/LP5562 Common Driver
34  *
45  * Copyright 2012 Texas Instruments
56  *
67  * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
7
- *
8
- * This program is free software; you can redistribute it and/or modify
9
- * it under the terms of the GNU General Public License version 2 as
10
- * published by the Free Software Foundation.
118  *
129  * Derived from leds-lp5521.c, leds-lp5523.c
1310  */
....@@ -20,8 +17,7 @@
2017 #include <linux/module.h>
2118 #include <linux/platform_data/leds-lp55xx.h>
2219 #include <linux/slab.h>
23
-#include <linux/gpio.h>
24
-#include <linux/of_gpio.h>
20
+#include <linux/gpio/consumer.h>
2521 
2622 #include "leds-lp55xx-common.h"
2723 
....@@ -36,6 +32,11 @@
3632 static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev)
3733 {
3834 	return cdev_to_lp55xx_led(dev_get_drvdata(dev));
35
+}
36
+
37
+static struct lp55xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
38
+{
39
+	return container_of(mc_cdev, struct lp55xx_led, mc_cdev);
3940 }
4041 
4142 static void lp55xx_reset_device(struct lp55xx_chip *chip)
....@@ -81,7 +82,7 @@
8182 	return cfg->post_init_device(chip);
8283 }
8384 
84
-static ssize_t lp55xx_show_current(struct device *dev,
85
+static ssize_t led_current_show(struct device *dev,
8586 			    struct device_attribute *attr,
8687 			    char *buf)
8788 {
....@@ -90,7 +91,7 @@
9091 	return scnprintf(buf, PAGE_SIZE, "%d\n", led->led_current);
9192 }
9293 
93
-static ssize_t lp55xx_store_current(struct device *dev,
94
+static ssize_t led_current_store(struct device *dev,
9495 			     struct device_attribute *attr,
9596 			     const char *buf, size_t len)
9697 {
....@@ -114,7 +115,7 @@
114115 	return len;
115116 }
116117 
117
-static ssize_t lp55xx_show_max_current(struct device *dev,
118
+static ssize_t max_current_show(struct device *dev,
118119 			    struct device_attribute *attr,
119120 			    char *buf)
120121 {
....@@ -123,9 +124,8 @@
123124 	return scnprintf(buf, PAGE_SIZE, "%d\n", led->max_current);
124125 }
125126 
126
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, lp55xx_show_current,
127
-		lp55xx_store_current);
128
-static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL);
127
+static DEVICE_ATTR_RW(led_current);
128
+static DEVICE_ATTR_RO(max_current);
129129 
130130 static struct attribute *lp55xx_led_attrs[] = {
131131 	&dev_attr_led_current.attr,
....@@ -133,6 +133,18 @@
133133 	NULL,
134134 };
135135 ATTRIBUTE_GROUPS(lp55xx_led);
136
+
137
+static int lp55xx_set_mc_brightness(struct led_classdev *cdev,
138
+				    enum led_brightness brightness)
139
+{
140
+	struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
141
+	struct lp55xx_led *led = mcled_cdev_to_led(mc_dev);
142
+	struct lp55xx_device_config *cfg = led->chip->cfg;
143
+
144
+	led_mc_calc_color_components(&led->mc_cdev, brightness);
145
+	return cfg->multicolor_brightness_fn(led);
146
+
147
+}
136148 
137149 static int lp55xx_set_brightness(struct led_classdev *cdev,
138150 			     enum led_brightness brightness)
....@@ -150,9 +162,12 @@
150162 	struct lp55xx_platform_data *pdata = chip->pdata;
151163 	struct lp55xx_device_config *cfg = chip->cfg;
152164 	struct device *dev = &chip->cl->dev;
153
-	char name[32];
154
-	int ret;
155165 	int max_channel = cfg->max_channel;
166
+	struct mc_subled *mc_led_info;
167
+	struct led_classdev *led_cdev;
168
+	char name[32];
169
+	int i, j = 0;
170
+	int ret;
156171 
157172 	if (chan >= max_channel) {
158173 		dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
....@@ -162,20 +177,6 @@
162177 	if (pdata->led_config[chan].led_current == 0)
163178 		return 0;
164179 
165
-	led->led_current = pdata->led_config[chan].led_current;
166
-	led->max_current = pdata->led_config[chan].max_current;
167
-	led->chan_nr = pdata->led_config[chan].chan_nr;
168
-	led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
169
-
170
-	if (led->chan_nr >= max_channel) {
171
-		dev_err(dev, "Use channel numbers between 0 and %d\n",
172
-			max_channel - 1);
173
-		return -EINVAL;
174
-	}
175
-
176
-	led->cdev.brightness_set_blocking = lp55xx_set_brightness;
177
-	led->cdev.groups = lp55xx_led_groups;
178
-
179180 	if (pdata->led_config[chan].name) {
180181 		led->cdev.name = pdata->led_config[chan].name;
181182 	} else {
....@@ -184,7 +185,47 @@
184185 		led->cdev.name = name;
185186 	}
186187 
187
-	ret = led_classdev_register(dev, &led->cdev);
188
+	if (pdata->led_config[chan].num_colors > 1) {
189
+		mc_led_info = devm_kcalloc(dev,
190
+					   pdata->led_config[chan].num_colors,
191
+					   sizeof(*mc_led_info), GFP_KERNEL);
192
+		if (!mc_led_info)
193
+			return -ENOMEM;
194
+
195
+		led_cdev = &led->mc_cdev.led_cdev;
196
+		led_cdev->name = led->cdev.name;
197
+		led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness;
198
+		led->mc_cdev.num_colors = pdata->led_config[chan].num_colors;
199
+		for (i = 0; i < led->mc_cdev.num_colors; i++) {
200
+			mc_led_info[i].color_index =
201
+				pdata->led_config[chan].color_id[i];
202
+			mc_led_info[i].channel =
203
+					pdata->led_config[chan].output_num[i];
204
+			j++;
205
+		}
206
+
207
+		led->mc_cdev.subled_info = mc_led_info;
208
+	} else {
209
+		led->cdev.brightness_set_blocking = lp55xx_set_brightness;
210
+	}
211
+
212
+	led->cdev.groups = lp55xx_led_groups;
213
+	led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
214
+	led->led_current = pdata->led_config[chan].led_current;
215
+	led->max_current = pdata->led_config[chan].max_current;
216
+	led->chan_nr = pdata->led_config[chan].chan_nr;
217
+
218
+	if (led->chan_nr >= max_channel) {
219
+		dev_err(dev, "Use channel numbers between 0 and %d\n",
220
+			max_channel - 1);
221
+		return -EINVAL;
222
+	}
223
+
224
+	if (pdata->led_config[chan].num_colors > 1)
225
+		ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev);
226
+	else
227
+		ret = devm_led_classdev_register(dev, &led->cdev);
228
+
188229 	if (ret) {
189230 		dev_err(dev, "led register err: %d\n", ret);
190231 		return ret;
....@@ -228,7 +269,7 @@
228269 				GFP_KERNEL, chip, lp55xx_firmware_loaded);
229270 }
230271 
231
-static ssize_t lp55xx_show_engine_select(struct device *dev,
272
+static ssize_t select_engine_show(struct device *dev,
232273 			    struct device_attribute *attr,
233274 			    char *buf)
234275 {
....@@ -238,7 +279,7 @@
238279 	return sprintf(buf, "%d\n", chip->engine_idx);
239280 }
240281 
241
-static ssize_t lp55xx_store_engine_select(struct device *dev,
282
+static ssize_t select_engine_store(struct device *dev,
242283 			     struct device_attribute *attr,
243284 			     const char *buf, size_t len)
244285 {
....@@ -280,7 +321,7 @@
280321 		chip->cfg->run_engine(chip, start);
281322 }
282323 
283
-static ssize_t lp55xx_store_engine_run(struct device *dev,
324
+static ssize_t run_engine_store(struct device *dev,
284325 			     struct device_attribute *attr,
285326 			     const char *buf, size_t len)
286327 {
....@@ -305,9 +346,8 @@
305346 	return len;
306347 }
307348 
308
-static DEVICE_ATTR(select_engine, S_IRUGO | S_IWUSR,
309
-		   lp55xx_show_engine_select, lp55xx_store_engine_select);
310
-static DEVICE_ATTR(run_engine, S_IWUSR, NULL, lp55xx_store_engine_run);
349
+static DEVICE_ATTR_RW(select_engine);
350
+static DEVICE_ATTR_WO(run_engine);
311351 
312352 static struct attribute *lp55xx_engine_attributes[] = {
313353 	&dev_attr_select_engine.attr,
....@@ -398,18 +438,11 @@
398438 	if (!pdata || !cfg)
399439 		return -EINVAL;
400440 
401
-	if (gpio_is_valid(pdata->enable_gpio)) {
402
-		ret = devm_gpio_request_one(dev, pdata->enable_gpio,
403
-					    GPIOF_DIR_OUT, "lp5523_enable");
404
-		if (ret < 0) {
405
-			dev_err(dev, "could not acquire enable gpio (err=%d)\n",
406
-				ret);
407
-			goto err;
408
-		}
409
-
410
-		gpio_set_value(pdata->enable_gpio, 0);
441
+	if (pdata->enable_gpiod) {
442
+		gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable");
443
+		gpiod_set_value(pdata->enable_gpiod, 0);
411444 		usleep_range(1000, 2000); /* Keep enable down at least 1ms */
412
-		gpio_set_value(pdata->enable_gpio, 1);
445
+		gpiod_set_value(pdata->enable_gpiod, 1);
413446 		usleep_range(1000, 2000); /* 500us abs min. */
414447 	}
415448 
....@@ -450,8 +483,8 @@
450483 	if (chip->clk)
451484 		clk_disable_unprepare(chip->clk);
452485 
453
-	if (gpio_is_valid(pdata->enable_gpio))
454
-		gpio_set_value(pdata->enable_gpio, 0);
486
+	if (pdata->enable_gpiod)
487
+		gpiod_set_value(pdata->enable_gpiod, 0);
455488 }
456489 EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
457490 
....@@ -493,22 +526,9 @@
493526 	return 0;
494527 
495528 err_init_led:
496
-	lp55xx_unregister_leds(led, chip);
497529 	return ret;
498530 }
499531 EXPORT_SYMBOL_GPL(lp55xx_register_leds);
500
-
501
-void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
502
-{
503
-	int i;
504
-	struct lp55xx_led *each;
505
-
506
-	for (i = 0; i < chip->num_leds; i++) {
507
-		each = led + i;
508
-		led_classdev_unregister(&each->cdev);
509
-	}
510
-}
511
-EXPORT_SYMBOL_GPL(lp55xx_unregister_leds);
512532 
513533 int lp55xx_register_sysfs(struct lp55xx_chip *chip)
514534 {
....@@ -541,20 +561,113 @@
541561 }
542562 EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
543563 
564
+static int lp55xx_parse_common_child(struct device_node *np,
565
+				     struct lp55xx_led_config *cfg,
566
+				     int led_number, int *chan_nr)
567
+{
568
+	int ret;
569
+
570
+	of_property_read_string(np, "chan-name",
571
+				&cfg[led_number].name);
572
+	of_property_read_u8(np, "led-cur",
573
+			    &cfg[led_number].led_current);
574
+	of_property_read_u8(np, "max-cur",
575
+			    &cfg[led_number].max_current);
576
+
577
+	ret = of_property_read_u32(np, "reg", chan_nr);
578
+	if (ret)
579
+		return ret;
580
+
581
+	if (*chan_nr < 0 || *chan_nr > cfg->max_channel)
582
+		return -EINVAL;
583
+
584
+	return 0;
585
+}
586
+
587
+static int lp55xx_parse_multi_led_child(struct device_node *child,
588
+					 struct lp55xx_led_config *cfg,
589
+					 int child_number, int color_number)
590
+{
591
+	int chan_nr, color_id, ret;
592
+
593
+	ret = lp55xx_parse_common_child(child, cfg, child_number, &chan_nr);
594
+	if (ret)
595
+		return ret;
596
+
597
+	ret = of_property_read_u32(child, "color", &color_id);
598
+	if (ret)
599
+		return ret;
600
+
601
+	cfg[child_number].color_id[color_number] = color_id;
602
+	cfg[child_number].output_num[color_number] = chan_nr;
603
+
604
+	return 0;
605
+}
606
+
607
+static int lp55xx_parse_multi_led(struct device_node *np,
608
+				  struct lp55xx_led_config *cfg,
609
+				  int child_number)
610
+{
611
+	struct device_node *child;
612
+	int num_colors = 0, ret;
613
+
614
+	for_each_available_child_of_node(np, child) {
615
+		ret = lp55xx_parse_multi_led_child(child, cfg, child_number,
616
+						   num_colors);
617
+		if (ret) {
618
+			of_node_put(child);
619
+			return ret;
620
+		}
621
+		num_colors++;
622
+	}
623
+
624
+	cfg[child_number].num_colors = num_colors;
625
+
626
+	return 0;
627
+}
628
+
629
+static int lp55xx_parse_logical_led(struct device_node *np,
630
+				   struct lp55xx_led_config *cfg,
631
+				   int child_number)
632
+{
633
+	int led_color, ret;
634
+	int chan_nr = 0;
635
+
636
+	cfg[child_number].default_trigger =
637
+		of_get_property(np, "linux,default-trigger", NULL);
638
+
639
+	ret = of_property_read_u32(np, "color", &led_color);
640
+	if (ret)
641
+		return ret;
642
+
643
+	if (led_color == LED_COLOR_ID_RGB)
644
+		return lp55xx_parse_multi_led(np, cfg, child_number);
645
+
646
+	ret =  lp55xx_parse_common_child(np, cfg, child_number, &chan_nr);
647
+	if (ret < 0)
648
+		return ret;
649
+
650
+	cfg[child_number].chan_nr = chan_nr;
651
+
652
+	return ret;
653
+}
654
+
544655 struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
545
-						      struct device_node *np)
656
+						      struct device_node *np,
657
+						      struct lp55xx_chip *chip)
546658 {
547659 	struct device_node *child;
548660 	struct lp55xx_platform_data *pdata;
549661 	struct lp55xx_led_config *cfg;
550662 	int num_channels;
551663 	int i = 0;
664
+	int ret;
552665 
553666 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
554667 	if (!pdata)
555668 		return ERR_PTR(-ENOMEM);
556669 
557
-	num_channels = of_get_child_count(np);
670
+	num_channels = of_get_available_child_count(np);
558671 	if (num_channels == 0) {
559672 		dev_err(dev, "no LED channels\n");
560673 		return ERR_PTR(-EINVAL);
....@@ -566,23 +679,24 @@
566679 
567680 	pdata->led_config = &cfg[0];
568681 	pdata->num_channels = num_channels;
682
+	cfg->max_channel = chip->cfg->max_channel;
569683 
570
-	for_each_child_of_node(np, child) {
571
-		cfg[i].chan_nr = i;
572
-
573
-		of_property_read_string(child, "chan-name", &cfg[i].name);
574
-		of_property_read_u8(child, "led-cur", &cfg[i].led_current);
575
-		of_property_read_u8(child, "max-cur", &cfg[i].max_current);
576
-		cfg[i].default_trigger =
577
-			of_get_property(child, "linux,default-trigger", NULL);
578
-
684
+	for_each_available_child_of_node(np, child) {
685
+		ret = lp55xx_parse_logical_led(child, cfg, i);
686
+		if (ret) {
687
+			of_node_put(child);
688
+			return ERR_PTR(-EINVAL);
689
+		}
579690 		i++;
580691 	}
581692 
582693 	of_property_read_string(np, "label", &pdata->label);
583694 	of_property_read_u8(np, "clock-mode", &pdata->clock_mode);
584695 
585
-	pdata->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
696
+	pdata->enable_gpiod = devm_gpiod_get_optional(dev, "enable",
697
+						      GPIOD_ASIS);
698
+	if (IS_ERR(pdata->enable_gpiod))
699
+		return ERR_CAST(pdata->enable_gpiod);
586700 
587701 	/* LP8501 specific */
588702 	of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel);