blob: aa56a867693afebfcdfc2dd49b739dd37c9029ae [file] [log] [blame]
Michael Henneriched4a10b2009-10-08 04:00:19 -04001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Michael Henneriched4a10b2009-10-08 04:00:19 -040024
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
Bryan Wubcbf0162012-07-04 12:11:40 +0800122 led = devm_kzalloc(&pdev->dev, sizeof(*led) * pdata->num_leds,
123 GFP_KERNEL);
Michael Henneriched4a10b2009-10-08 04:00:19 -0400124 if (led == NULL) {
125 dev_err(&pdev->dev, "failed to alloc memory\n");
126 return -ENOMEM;
127 }
128
129 ret = adp5520_led_prepare(pdev);
130
131 if (ret) {
132 dev_err(&pdev->dev, "failed to write\n");
Bryan Wubcbf0162012-07-04 12:11:40 +0800133 return ret;
Michael Henneriched4a10b2009-10-08 04:00:19 -0400134 }
135
136 for (i = 0; i < pdata->num_leds; ++i) {
137 cur_led = &pdata->leds[i];
138 led_dat = &led[i];
139
140 led_dat->cdev.name = cur_led->name;
141 led_dat->cdev.default_trigger = cur_led->default_trigger;
142 led_dat->cdev.brightness_set = adp5520_led_set;
143 led_dat->cdev.brightness = LED_OFF;
144
145 if (cur_led->flags & ADP5520_FLAG_LED_MASK)
146 led_dat->flags = cur_led->flags;
147 else
148 led_dat->flags = i + 1;
149
150 led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
151
152 led_dat->master = pdev->dev.parent;
153 led_dat->new_brightness = LED_OFF;
154
155 INIT_WORK(&led_dat->work, adp5520_led_work);
156
157 ret = led_classdev_register(led_dat->master, &led_dat->cdev);
158 if (ret) {
159 dev_err(&pdev->dev, "failed to register LED %d\n",
160 led_dat->id);
161 goto err;
162 }
163
164 ret = adp5520_led_setup(led_dat);
165 if (ret) {
166 dev_err(&pdev->dev, "failed to write\n");
167 i++;
168 goto err;
169 }
170 }
171
172 platform_set_drvdata(pdev, led);
173 return 0;
174
175err:
176 if (i > 0) {
177 for (i = i - 1; i >= 0; i--) {
178 led_classdev_unregister(&led[i].cdev);
179 cancel_work_sync(&led[i].work);
180 }
181 }
182
Michael Henneriched4a10b2009-10-08 04:00:19 -0400183 return ret;
184}
185
186static int __devexit adp5520_led_remove(struct platform_device *pdev)
187{
188 struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
189 struct adp5520_led *led;
190 int i;
191
192 led = platform_get_drvdata(pdev);
193
194 adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
195 ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
196
197 for (i = 0; i < pdata->num_leds; i++) {
198 led_classdev_unregister(&led[i].cdev);
199 cancel_work_sync(&led[i].work);
200 }
201
Michael Henneriched4a10b2009-10-08 04:00:19 -0400202 return 0;
203}
204
205static struct platform_driver adp5520_led_driver = {
206 .driver = {
207 .name = "adp5520-led",
208 .owner = THIS_MODULE,
209 },
210 .probe = adp5520_led_probe,
211 .remove = __devexit_p(adp5520_led_remove),
212};
213
Axel Lin892a8842012-01-10 15:09:24 -0800214module_platform_driver(adp5520_led_driver);
Michael Henneriched4a10b2009-10-08 04:00:19 -0400215
216MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
217MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
218MODULE_LICENSE("GPL");
219MODULE_ALIAS("platform:adp5520-led");