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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
4 *
5 * Copyright 2009 Analog Devices Inc.
6 *
7 * Loosely derived from leds-da903x:
8 * Copyright (C) 2008 Compulab, Ltd.
9 * Mike Rapoport <mike@compulab.co.il>
10 *
11 * Copyright (C) 2006-2008 Marvell International Ltd.
12 * Eric Miao <eric.miao@marvell.com>
13 */
14
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/platform_device.h>
18#include <linux/leds.h>
19#include <linux/mfd/adp5520.h>
20#include <linux/slab.h>
21
22struct adp5520_led {
23 struct led_classdev cdev;
24 struct device *master;
25 int id;
26 int flags;
27};
28
29static int adp5520_led_set(struct led_classdev *led_cdev,
30 enum led_brightness value)
31{
32 struct adp5520_led *led;
33
34 led = container_of(led_cdev, struct adp5520_led, cdev);
35 return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
36 value >> 2);
37}
38
39static int adp5520_led_setup(struct adp5520_led *led)
40{
41 struct device *dev = led->master;
42 int flags = led->flags;
43 int ret = 0;
44
45 switch (led->id) {
46 case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
47 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
48 (flags >> ADP5520_FLAG_OFFT_SHIFT) &
49 ADP5520_FLAG_OFFT_MASK);
50 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
51 ADP5520_LED1_EN);
52 break;
53 case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
54 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
55 ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
56 ADP5520_FLAG_OFFT_MASK) << 2);
57 ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
58 ADP5520_R3_MODE);
59 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
60 ADP5520_LED2_EN);
61 break;
62 case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
63 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
64 ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
65 ADP5520_FLAG_OFFT_MASK) << 4);
66 ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
67 ADP5520_C3_MODE);
68 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
69 ADP5520_LED3_EN);
70 break;
71 }
72
73 return ret;
74}
75
76static int adp5520_led_prepare(struct platform_device *pdev)
77{
78 struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
79 struct device *dev = pdev->dev.parent;
80 int ret = 0;
81
82 ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
83 ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
84 ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
85 ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
86 ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
87 pdata->fade_out));
88
89 return ret;
90}
91
92static int adp5520_led_probe(struct platform_device *pdev)
93{
94 struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
95 struct adp5520_led *led, *led_dat;
96 struct led_info *cur_led;
97 int ret, i;
98
99 if (pdata == NULL) {
100 dev_err(&pdev->dev, "missing platform data\n");
101 return -ENODEV;
102 }
103
104 if (pdata->num_leds > ADP5520_01_MAXLEDS) {
105 dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
106 ADP5520_01_MAXLEDS);
107 return -EFAULT;
108 }
109
110 led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led),
111 GFP_KERNEL);
112 if (!led)
113 return -ENOMEM;
114
115 ret = adp5520_led_prepare(pdev);
116 if (ret) {
117 dev_err(&pdev->dev, "failed to write\n");
118 return ret;
119 }
120
121 for (i = 0; i < pdata->num_leds; ++i) {
122 cur_led = &pdata->leds[i];
123 led_dat = &led[i];
124
125 led_dat->cdev.name = cur_led->name;
126 led_dat->cdev.default_trigger = cur_led->default_trigger;
127 led_dat->cdev.brightness_set_blocking = adp5520_led_set;
128 led_dat->cdev.brightness = LED_OFF;
129
130 if (cur_led->flags & ADP5520_FLAG_LED_MASK)
131 led_dat->flags = cur_led->flags;
132 else
133 led_dat->flags = i + 1;
134
135 led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
136
137 led_dat->master = pdev->dev.parent;
138
139 ret = led_classdev_register(led_dat->master, &led_dat->cdev);
140 if (ret) {
141 dev_err(&pdev->dev, "failed to register LED %d\n",
142 led_dat->id);
143 goto err;
144 }
145
146 ret = adp5520_led_setup(led_dat);
147 if (ret) {
148 dev_err(&pdev->dev, "failed to write\n");
149 i++;
150 goto err;
151 }
152 }
153
154 platform_set_drvdata(pdev, led);
155 return 0;
156
157err:
158 if (i > 0) {
159 for (i = i - 1; i >= 0; i--)
160 led_classdev_unregister(&led[i].cdev);
161 }
162
163 return ret;
164}
165
166static void adp5520_led_remove(struct platform_device *pdev)
167{
168 struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
169 struct adp5520_led *led;
170 int i;
171
172 led = platform_get_drvdata(pdev);
173
174 adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
175 ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
176
177 for (i = 0; i < pdata->num_leds; i++) {
178 led_classdev_unregister(&led[i].cdev);
179 }
180}
181
182static struct platform_driver adp5520_led_driver = {
183 .driver = {
184 .name = "adp5520-led",
185 },
186 .probe = adp5520_led_probe,
187 .remove_new = adp5520_led_remove,
188};
189
190module_platform_driver(adp5520_led_driver);
191
192MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
193MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
194MODULE_LICENSE("GPL");
195MODULE_ALIAS("platform:adp5520-led");
1/*
2 * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
3 *
4 * Copyright 2009 Analog Devices Inc.
5 *
6 * Loosely derived from leds-da903x:
7 * Copyright (C) 2008 Compulab, Ltd.
8 * Mike Rapoport <mike@compulab.co.il>
9 *
10 * Copyright (C) 2006-2008 Marvell International Ltd.
11 * Eric Miao <eric.miao@marvell.com>
12 *
13 * Licensed under the GPL-2 or later.
14 */
15
16#include <linux/module.h>
17#include <linux/kernel.h>
18#include <linux/init.h>
19#include <linux/platform_device.h>
20#include <linux/leds.h>
21#include <linux/workqueue.h>
22#include <linux/mfd/adp5520.h>
23#include <linux/slab.h>
24
25struct adp5520_led {
26 struct led_classdev cdev;
27 struct work_struct work;
28 struct device *master;
29 enum led_brightness new_brightness;
30 int id;
31 int flags;
32};
33
34static void adp5520_led_work(struct work_struct *work)
35{
36 struct adp5520_led *led = container_of(work, struct adp5520_led, work);
37 adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
38 led->new_brightness >> 2);
39}
40
41static void adp5520_led_set(struct led_classdev *led_cdev,
42 enum led_brightness value)
43{
44 struct adp5520_led *led;
45
46 led = container_of(led_cdev, struct adp5520_led, cdev);
47 led->new_brightness = value;
48 schedule_work(&led->work);
49}
50
51static int adp5520_led_setup(struct adp5520_led *led)
52{
53 struct device *dev = led->master;
54 int flags = led->flags;
55 int ret = 0;
56
57 switch (led->id) {
58 case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
59 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
60 (flags >> ADP5520_FLAG_OFFT_SHIFT) &
61 ADP5520_FLAG_OFFT_MASK);
62 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
63 ADP5520_LED1_EN);
64 break;
65 case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
66 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
67 ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
68 ADP5520_FLAG_OFFT_MASK) << 2);
69 ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
70 ADP5520_R3_MODE);
71 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
72 ADP5520_LED2_EN);
73 break;
74 case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
75 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
76 ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
77 ADP5520_FLAG_OFFT_MASK) << 4);
78 ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
79 ADP5520_C3_MODE);
80 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
81 ADP5520_LED3_EN);
82 break;
83 }
84
85 return ret;
86}
87
88static int __devinit adp5520_led_prepare(struct platform_device *pdev)
89{
90 struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
91 struct device *dev = pdev->dev.parent;
92 int ret = 0;
93
94 ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
95 ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
96 ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
97 ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
98 ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
99 pdata->fade_out));
100
101 return ret;
102}
103
104static int __devinit adp5520_led_probe(struct platform_device *pdev)
105{
106 struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
107 struct adp5520_led *led, *led_dat;
108 struct led_info *cur_led;
109 int ret, i;
110
111 if (pdata == NULL) {
112 dev_err(&pdev->dev, "missing platform data\n");
113 return -ENODEV;
114 }
115
116 if (pdata->num_leds > ADP5520_01_MAXLEDS) {
117 dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
118 ADP5520_01_MAXLEDS);
119 return -EFAULT;
120 }
121
122 led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
123 if (led == NULL) {
124 dev_err(&pdev->dev, "failed to alloc memory\n");
125 return -ENOMEM;
126 }
127
128 ret = adp5520_led_prepare(pdev);
129
130 if (ret) {
131 dev_err(&pdev->dev, "failed to write\n");
132 goto err_free;
133 }
134
135 for (i = 0; i < pdata->num_leds; ++i) {
136 cur_led = &pdata->leds[i];
137 led_dat = &led[i];
138
139 led_dat->cdev.name = cur_led->name;
140 led_dat->cdev.default_trigger = cur_led->default_trigger;
141 led_dat->cdev.brightness_set = adp5520_led_set;
142 led_dat->cdev.brightness = LED_OFF;
143
144 if (cur_led->flags & ADP5520_FLAG_LED_MASK)
145 led_dat->flags = cur_led->flags;
146 else
147 led_dat->flags = i + 1;
148
149 led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
150
151 led_dat->master = pdev->dev.parent;
152 led_dat->new_brightness = LED_OFF;
153
154 INIT_WORK(&led_dat->work, adp5520_led_work);
155
156 ret = led_classdev_register(led_dat->master, &led_dat->cdev);
157 if (ret) {
158 dev_err(&pdev->dev, "failed to register LED %d\n",
159 led_dat->id);
160 goto err;
161 }
162
163 ret = adp5520_led_setup(led_dat);
164 if (ret) {
165 dev_err(&pdev->dev, "failed to write\n");
166 i++;
167 goto err;
168 }
169 }
170
171 platform_set_drvdata(pdev, led);
172 return 0;
173
174err:
175 if (i > 0) {
176 for (i = i - 1; i >= 0; i--) {
177 led_classdev_unregister(&led[i].cdev);
178 cancel_work_sync(&led[i].work);
179 }
180 }
181
182err_free:
183 kfree(led);
184 return ret;
185}
186
187static int __devexit adp5520_led_remove(struct platform_device *pdev)
188{
189 struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
190 struct adp5520_led *led;
191 int i;
192
193 led = platform_get_drvdata(pdev);
194
195 adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
196 ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
197
198 for (i = 0; i < pdata->num_leds; i++) {
199 led_classdev_unregister(&led[i].cdev);
200 cancel_work_sync(&led[i].work);
201 }
202
203 kfree(led);
204 return 0;
205}
206
207static struct platform_driver adp5520_led_driver = {
208 .driver = {
209 .name = "adp5520-led",
210 .owner = THIS_MODULE,
211 },
212 .probe = adp5520_led_probe,
213 .remove = __devexit_p(adp5520_led_remove),
214};
215
216static int __init adp5520_led_init(void)
217{
218 return platform_driver_register(&adp5520_led_driver);
219}
220module_init(adp5520_led_init);
221
222static void __exit adp5520_led_exit(void)
223{
224 platform_driver_unregister(&adp5520_led_driver);
225}
226module_exit(adp5520_led_exit);
227
228MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
229MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
230MODULE_LICENSE("GPL");
231MODULE_ALIAS("platform:adp5520-led");