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9e84561c MR |
1 | /* |
2 | * LEDs driver for Dialog Semiconductor DA9030/DA9034 | |
3 | * | |
4 | * Copyright (C) 2008 Compulab, Ltd. | |
141bfeea | 5 | * Mike Rapoport <mike@compulab.co.il> |
9e84561c MR |
6 | * |
7 | * Copyright (C) 2006-2008 Marvell International Ltd. | |
141bfeea | 8 | * Eric Miao <eric.miao@marvell.com> |
9e84561c MR |
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> | |
9e84561c MR |
17 | #include <linux/platform_device.h> |
18 | #include <linux/leds.h> | |
b9b54aa2 | 19 | #include <linux/workqueue.h> |
9e84561c | 20 | #include <linux/mfd/da903x.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
9e84561c MR |
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 | ||
34 | struct 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 | ||
46 | static 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 */ | |
a0601c89 | 61 | val |= (0x7 - (led->new_brightness >> 5)) & 0x7; /* PWM<2:0> */ |
9e84561c MR |
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 | ||
83 | static void da903x_led_set(struct led_classdev *led_cdev, | |
84 | enum led_brightness value) | |
85 | { | |
86 | struct da903x_led *led; | |
141bfeea | 87 | |
9e84561c MR |
88 | led = container_of(led_cdev, struct da903x_led, cdev); |
89 | led->new_brightness = value; | |
90 | schedule_work(&led->work); | |
91 | } | |
92 | ||
98ea1ea2 | 93 | static int da903x_led_probe(struct platform_device *pdev) |
9e84561c | 94 | { |
87aae1ea | 95 | struct led_info *pdata = dev_get_platdata(&pdev->dev); |
9e84561c MR |
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 | ||
bad1c898 | 110 | led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL); |
0c9a03b6 | 111 | if (!led) |
9e84561c | 112 | return -ENOMEM; |
9e84561c MR |
113 | |
114 | led->cdev.name = pdata->name; | |
115 | led->cdev.default_trigger = pdata->default_trigger; | |
116 | led->cdev.brightness_set = da903x_led_set; | |
117 | led->cdev.brightness = LED_OFF; | |
118 | ||
119 | led->id = id; | |
120 | led->flags = pdata->flags; | |
121 | led->master = pdev->dev.parent; | |
122 | led->new_brightness = LED_OFF; | |
123 | ||
124 | INIT_WORK(&led->work, da903x_led_work); | |
125 | ||
126 | ret = led_classdev_register(led->master, &led->cdev); | |
127 | if (ret) { | |
128 | dev_err(&pdev->dev, "failed to register LED %d\n", id); | |
bad1c898 | 129 | return ret; |
9e84561c MR |
130 | } |
131 | ||
132 | platform_set_drvdata(pdev, led); | |
133 | return 0; | |
9e84561c MR |
134 | } |
135 | ||
678e8a6b | 136 | static int da903x_led_remove(struct platform_device *pdev) |
9e84561c MR |
137 | { |
138 | struct da903x_led *led = platform_get_drvdata(pdev); | |
139 | ||
140 | led_classdev_unregister(&led->cdev); | |
9e84561c MR |
141 | return 0; |
142 | } | |
143 | ||
144 | static struct platform_driver da903x_led_driver = { | |
145 | .driver = { | |
146 | .name = "da903x-led", | |
147 | .owner = THIS_MODULE, | |
148 | }, | |
149 | .probe = da903x_led_probe, | |
df07cf81 | 150 | .remove = da903x_led_remove, |
9e84561c MR |
151 | }; |
152 | ||
892a8843 | 153 | module_platform_driver(da903x_led_driver); |
9e84561c MR |
154 | |
155 | MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034"); | |
141bfeea SK |
156 | MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); |
157 | MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); | |
9e84561c MR |
158 | MODULE_LICENSE("GPL"); |
159 | MODULE_ALIAS("platform:da903x-led"); |