Commit | Line | Data |
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0a2f915b HZ |
1 | /* |
2 | * LED driver for Marvell 88PM860x | |
3 | * | |
4 | * Copyright (C) 2009 Marvell International Ltd. | |
5 | * Haojian Zhuang <haojian.zhuang@marvell.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/leds.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
0a2f915b HZ |
19 | #include <linux/workqueue.h> |
20 | #include <linux/mfd/88pm860x.h> | |
54f4dedb | 21 | #include <linux/module.h> |
0a2f915b | 22 | |
0a2f915b HZ |
23 | #define LED_PWM_MASK (0x1F) |
24 | #define LED_CURRENT_MASK (0x07 << 5) | |
25 | ||
0a2f915b HZ |
26 | #define LED_BLINK_MASK (0x7F) |
27 | ||
f5d59fc5 | 28 | #define LED_ON_CONTINUOUS (0x0F << 3) |
0a2f915b HZ |
29 | |
30 | #define LED1_BLINK_EN (1 << 1) | |
31 | #define LED2_BLINK_EN (1 << 2) | |
32 | ||
0a2f915b HZ |
33 | struct pm860x_led { |
34 | struct led_classdev cdev; | |
35 | struct i2c_client *i2c; | |
36 | struct work_struct work; | |
37 | struct pm860x_chip *chip; | |
38 | struct mutex lock; | |
39 | char name[MFD_NAME_SIZE]; | |
40 | ||
41 | int port; | |
42 | int iset; | |
0a2f915b HZ |
43 | unsigned char brightness; |
44 | unsigned char current_brightness; | |
45 | ||
894fc8f2 HZ |
46 | int reg_control; |
47 | int reg_blink; | |
48 | int blink_mask; | |
0a2f915b HZ |
49 | }; |
50 | ||
b3b97473 JZ |
51 | static int led_power_set(struct pm860x_chip *chip, int port, int on) |
52 | { | |
53 | int ret = -EINVAL; | |
54 | ||
55 | switch (port) { | |
894fc8f2 HZ |
56 | case 0: |
57 | case 1: | |
58 | case 2: | |
b3b97473 JZ |
59 | ret = on ? pm8606_osc_enable(chip, RGB1_ENABLE) : |
60 | pm8606_osc_disable(chip, RGB1_ENABLE); | |
61 | break; | |
894fc8f2 HZ |
62 | case 3: |
63 | case 4: | |
64 | case 5: | |
b3b97473 JZ |
65 | ret = on ? pm8606_osc_enable(chip, RGB2_ENABLE) : |
66 | pm8606_osc_disable(chip, RGB2_ENABLE); | |
67 | break; | |
68 | } | |
69 | return ret; | |
70 | } | |
71 | ||
f5d59fc5 | 72 | static void pm860x_led_work(struct work_struct *work) |
0a2f915b | 73 | { |
0a2f915b | 74 | |
f5d59fc5 HZ |
75 | struct pm860x_led *led; |
76 | struct pm860x_chip *chip; | |
3154c344 | 77 | unsigned char buf[3]; |
894fc8f2 | 78 | int ret; |
f5d59fc5 HZ |
79 | |
80 | led = container_of(work, struct pm860x_led, work); | |
81 | chip = led->chip; | |
0a2f915b | 82 | mutex_lock(&led->lock); |
f5d59fc5 | 83 | if ((led->current_brightness == 0) && led->brightness) { |
b3b97473 | 84 | led_power_set(chip, led->port, 1); |
f5d59fc5 | 85 | if (led->iset) { |
894fc8f2 | 86 | pm860x_set_bits(led->i2c, led->reg_control, |
f5d59fc5 | 87 | LED_CURRENT_MASK, led->iset); |
0a2f915b | 88 | } |
894fc8f2 | 89 | pm860x_set_bits(led->i2c, led->reg_blink, |
3154c344 | 90 | LED_BLINK_MASK, LED_ON_CONTINUOUS); |
894fc8f2 HZ |
91 | pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask, |
92 | led->blink_mask); | |
0a2f915b | 93 | } |
894fc8f2 | 94 | pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK, |
f5d59fc5 | 95 | led->brightness); |
3154c344 HZ |
96 | |
97 | if (led->brightness == 0) { | |
894fc8f2 | 98 | pm860x_bulk_read(led->i2c, led->reg_control, 3, buf); |
3154c344 HZ |
99 | ret = buf[0] & LED_PWM_MASK; |
100 | ret |= buf[1] & LED_PWM_MASK; | |
101 | ret |= buf[2] & LED_PWM_MASK; | |
102 | if (ret == 0) { | |
103 | /* unset current since no led is lighting */ | |
894fc8f2 | 104 | pm860x_set_bits(led->i2c, led->reg_control, |
3154c344 | 105 | LED_CURRENT_MASK, 0); |
894fc8f2 HZ |
106 | pm860x_set_bits(led->i2c, PM8606_WLED3B, |
107 | led->blink_mask, 0); | |
b3b97473 | 108 | led_power_set(chip, led->port, 0); |
3154c344 HZ |
109 | } |
110 | } | |
f5d59fc5 HZ |
111 | led->current_brightness = led->brightness; |
112 | dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n", | |
894fc8f2 | 113 | led->reg_control, led->brightness); |
0a2f915b | 114 | mutex_unlock(&led->lock); |
0a2f915b HZ |
115 | } |
116 | ||
117 | static void pm860x_led_set(struct led_classdev *cdev, | |
118 | enum led_brightness value) | |
119 | { | |
120 | struct pm860x_led *data = container_of(cdev, struct pm860x_led, cdev); | |
121 | ||
0a2f915b | 122 | data->brightness = value >> 3; |
0a2f915b | 123 | schedule_work(&data->work); |
0a2f915b HZ |
124 | } |
125 | ||
0a2f915b HZ |
126 | static int pm860x_led_probe(struct platform_device *pdev) |
127 | { | |
128 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
894fc8f2 | 129 | struct pm860x_led_pdata *pdata = pdev->dev.platform_data; |
0a2f915b HZ |
130 | struct pm860x_led *data; |
131 | struct resource *res; | |
894fc8f2 | 132 | int ret = 0; |
0a2f915b | 133 | |
b523cfe6 | 134 | data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL); |
0a2f915b HZ |
135 | if (data == NULL) |
136 | return -ENOMEM; | |
894fc8f2 HZ |
137 | res = platform_get_resource_byname(pdev, IORESOURCE_REG, "control"); |
138 | if (!res) { | |
139 | dev_err(&pdev->dev, "No REG resource for control\n"); | |
140 | ret = -ENXIO; | |
141 | goto out; | |
142 | } | |
143 | data->reg_control = res->start; | |
144 | res = platform_get_resource_byname(pdev, IORESOURCE_REG, "blink"); | |
145 | if (!res) { | |
146 | dev_err(&pdev->dev, "No REG resource for blink\n"); | |
147 | ret = -ENXIO; | |
148 | goto out; | |
149 | } | |
150 | data->reg_blink = res->start; | |
151 | memset(data->name, 0, MFD_NAME_SIZE); | |
152 | switch (pdev->id) { | |
153 | case 0: | |
154 | data->blink_mask = LED1_BLINK_EN; | |
155 | sprintf(data->name, "led0-red"); | |
156 | break; | |
157 | case 1: | |
158 | data->blink_mask = LED1_BLINK_EN; | |
159 | sprintf(data->name, "led0-green"); | |
160 | break; | |
161 | case 2: | |
162 | data->blink_mask = LED1_BLINK_EN; | |
163 | sprintf(data->name, "led0-blue"); | |
164 | break; | |
165 | case 3: | |
166 | data->blink_mask = LED2_BLINK_EN; | |
167 | sprintf(data->name, "led1-red"); | |
168 | break; | |
169 | case 4: | |
170 | data->blink_mask = LED2_BLINK_EN; | |
171 | sprintf(data->name, "led1-green"); | |
172 | break; | |
173 | case 5: | |
174 | data->blink_mask = LED2_BLINK_EN; | |
175 | sprintf(data->name, "led1-blue"); | |
176 | break; | |
177 | } | |
0a2f915b HZ |
178 | dev_set_drvdata(&pdev->dev, data); |
179 | data->chip = chip; | |
180 | data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion; | |
894fc8f2 HZ |
181 | data->port = pdev->id; |
182 | if (pdata && pdata->iset) | |
183 | data->iset = pdata->iset; | |
0a2f915b HZ |
184 | |
185 | data->current_brightness = 0; | |
186 | data->cdev.name = data->name; | |
187 | data->cdev.brightness_set = pm860x_led_set; | |
0a2f915b HZ |
188 | mutex_init(&data->lock); |
189 | INIT_WORK(&data->work, pm860x_led_work); | |
190 | ||
191 | ret = led_classdev_register(chip->dev, &data->cdev); | |
192 | if (ret < 0) { | |
193 | dev_err(&pdev->dev, "Failed to register LED: %d\n", ret); | |
b523cfe6 | 194 | return ret; |
0a2f915b | 195 | } |
3154c344 | 196 | pm860x_led_set(&data->cdev, 0); |
0a2f915b | 197 | return 0; |
894fc8f2 HZ |
198 | out: |
199 | devm_kfree(&pdev->dev, data); | |
200 | return ret; | |
0a2f915b HZ |
201 | } |
202 | ||
203 | static int pm860x_led_remove(struct platform_device *pdev) | |
204 | { | |
205 | struct pm860x_led *data = platform_get_drvdata(pdev); | |
206 | ||
207 | led_classdev_unregister(&data->cdev); | |
0a2f915b HZ |
208 | |
209 | return 0; | |
210 | } | |
211 | ||
212 | static struct platform_driver pm860x_led_driver = { | |
213 | .driver = { | |
214 | .name = "88pm860x-led", | |
215 | .owner = THIS_MODULE, | |
216 | }, | |
217 | .probe = pm860x_led_probe, | |
218 | .remove = pm860x_led_remove, | |
219 | }; | |
220 | ||
892a8843 | 221 | module_platform_driver(pm860x_led_driver); |
0a2f915b HZ |
222 | |
223 | MODULE_DESCRIPTION("LED driver for Marvell PM860x"); | |
224 | MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); | |
225 | MODULE_LICENSE("GPL"); | |
226 | MODULE_ALIAS("platform:88pm860x-led"); |