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-rw-r--r--drivers/leds/leds-da903x.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/drivers/leds/leds-da903x.c b/drivers/leds/leds-da903x.c
new file mode 100644
index 00000000000..1f3cc512eff
--- /dev/null
+++ b/drivers/leds/leds-da903x.c
@@ -0,0 +1,176 @@
1/*
2 * LEDs driver for Dialog Semiconductor DA9030/DA9034
3 *
4 * Copyright (C) 2008 Compulab, Ltd.
5 * Mike Rapoport <mike@compulab.co.il>
6 *
7 * Copyright (C) 2006-2008 Marvell International Ltd.
8 * Eric Miao <eric.miao@marvell.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/platform_device.h>
19#include <linux/leds.h>
20#include <linux/workqueue.h>
21#include <linux/mfd/da903x.h>
22
23#define DA9030_LED1_CONTROL 0x20
24#define DA9030_LED2_CONTROL 0x21
25#define DA9030_LED3_CONTROL 0x22
26#define DA9030_LED4_CONTROL 0x23
27#define DA9030_LEDPC_CONTROL 0x24
28#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */
29
30#define DA9034_LED1_CONTROL 0x35
31#define DA9034_LED2_CONTROL 0x36
32#define DA9034_VIBRA 0x40
33
34struct da903x_led {
35 struct led_classdev cdev;
36 struct work_struct work;
37 struct device *master;
38 enum led_brightness new_brightness;
39 int id;
40 int flags;
41};
42
43#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
44#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)
45
46static void da903x_led_work(struct work_struct *work)
47{
48 struct da903x_led *led = container_of(work, struct da903x_led, work);
49 uint8_t val;
50 int offset;
51
52 switch (led->id) {
53 case DA9030_ID_LED_1:
54 case DA9030_ID_LED_2:
55 case DA9030_ID_LED_3:
56 case DA9030_ID_LED_4:
57 case DA9030_ID_LED_PC:
58 offset = DA9030_LED_OFFSET(led->id);
59 val = led->flags & ~0x87;
60 val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */
61 val |= (0x7 - (led->new_brightness >> 5)) & 0x7; /* PWM<2:0> */
62 da903x_write(led->master, DA9030_LED1_CONTROL + offset, val);
63 break;
64 case DA9030_ID_VIBRA:
65 val = led->flags & ~0x80;
66 val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */
67 da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
68 break;
69 case DA9034_ID_LED_1:
70 case DA9034_ID_LED_2:
71 offset = DA9034_LED_OFFSET(led->id);
72 val = (led->new_brightness * 0x5f / LED_FULL) & 0x7f;
73 val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
74 da903x_write(led->master, DA9034_LED1_CONTROL + offset, val);
75 break;
76 case DA9034_ID_VIBRA:
77 val = led->new_brightness & 0xfe;
78 da903x_write(led->master, DA9034_VIBRA, val);
79 break;
80 }
81}
82
83static void da903x_led_set(struct led_classdev *led_cdev,
84 enum led_brightness value)
85{
86 struct da903x_led *led;
87
88 led = container_of(led_cdev, struct da903x_led, cdev);
89 led->new_brightness = value;
90 schedule_work(&led->work);
91}
92
93static int __devinit da903x_led_probe(struct platform_device *pdev)
94{
95 struct led_info *pdata = pdev->dev.platform_data;
96 struct da903x_led *led;
97 int id, ret;
98
99 if (pdata == NULL)
100 return 0;
101
102 id = pdev->id;
103
104 if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) ||
105 (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
106 dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
107 return -EINVAL;
108 }
109
110 led = kzalloc(sizeof(struct da903x_led), GFP_KERNEL);
111 if (led == NULL) {
112 dev_err(&pdev->dev, "failed to alloc memory for LED%d\n", id);
113 return -ENOMEM;
114 }
115
116 led->cdev.name = pdata->name;
117 led->cdev.default_trigger = pdata->default_trigger;
118 led->cdev.brightness_set = da903x_led_set;
119 led->cdev.brightness = LED_OFF;
120
121 led->id = id;
122 led->flags = pdata->flags;
123 led->master = pdev->dev.parent;
124 led->new_brightness = LED_OFF;
125
126 INIT_WORK(&led->work, da903x_led_work);
127
128 ret = led_classdev_register(led->master, &led->cdev);
129 if (ret) {
130 dev_err(&pdev->dev, "failed to register LED %d\n", id);
131 goto err;
132 }
133
134 platform_set_drvdata(pdev, led);
135 return 0;
136
137err:
138 kfree(led);
139 return ret;
140}
141
142static int __devexit da903x_led_remove(struct platform_device *pdev)
143{
144 struct da903x_led *led = platform_get_drvdata(pdev);
145
146 led_classdev_unregister(&led->cdev);
147 kfree(led);
148 return 0;
149}
150
151static struct platform_driver da903x_led_driver = {
152 .driver = {
153 .name = "da903x-led",
154 .owner = THIS_MODULE,
155 },
156 .probe = da903x_led_probe,
157 .remove = __devexit_p(da903x_led_remove),
158};
159
160static int __init da903x_led_init(void)
161{
162 return platform_driver_register(&da903x_led_driver);
163}
164module_init(da903x_led_init);
165
166static void __exit da903x_led_exit(void)
167{
168 platform_driver_unregister(&da903x_led_driver);
169}
170module_exit(da903x_led_exit);
171
172MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
173MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
174 "Mike Rapoport <mike@compulab.co.il>");
175MODULE_LICENSE("GPL");
176MODULE_ALIAS("platform:da903x-led");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-29 15:19:15 -0500