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