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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
216module_platform_driver(adp5520_led_driver);
217
218MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
219MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
220MODULE_LICENSE("GPL");
221MODULE_ALIAS("platform:adp5520-led");
222
