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> | |
2e57d567 | 14 | #include <linux/of.h> |
0a2f915b HZ |
15 | #include <linux/platform_device.h> |
16 | #include <linux/i2c.h> | |
17 | #include <linux/leds.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
0a2f915b | 19 | #include <linux/mfd/88pm860x.h> |
54f4dedb | 20 | #include <linux/module.h> |
0a2f915b | 21 | |
0a2f915b HZ |
22 | #define LED_PWM_MASK (0x1F) |
23 | #define LED_CURRENT_MASK (0x07 << 5) | |
24 | ||
0a2f915b HZ |
25 | #define LED_BLINK_MASK (0x7F) |
26 | ||
f5d59fc5 | 27 | #define LED_ON_CONTINUOUS (0x0F << 3) |
0a2f915b HZ |
28 | |
29 | #define LED1_BLINK_EN (1 << 1) | |
30 | #define LED2_BLINK_EN (1 << 2) | |
31 | ||
0a2f915b HZ |
32 | struct pm860x_led { |
33 | struct led_classdev cdev; | |
34 | struct i2c_client *i2c; | |
0a2f915b HZ |
35 | struct pm860x_chip *chip; |
36 | struct mutex lock; | |
37 | char name[MFD_NAME_SIZE]; | |
38 | ||
39 | int port; | |
40 | int iset; | |
0a2f915b HZ |
41 | unsigned char brightness; |
42 | unsigned char current_brightness; | |
43 | ||
894fc8f2 HZ |
44 | int reg_control; |
45 | int reg_blink; | |
46 | int blink_mask; | |
0a2f915b HZ |
47 | }; |
48 | ||
b3b97473 JZ |
49 | static int led_power_set(struct pm860x_chip *chip, int port, int on) |
50 | { | |
51 | int ret = -EINVAL; | |
52 | ||
53 | switch (port) { | |
894fc8f2 HZ |
54 | case 0: |
55 | case 1: | |
56 | case 2: | |
b3b97473 JZ |
57 | ret = on ? pm8606_osc_enable(chip, RGB1_ENABLE) : |
58 | pm8606_osc_disable(chip, RGB1_ENABLE); | |
59 | break; | |
894fc8f2 HZ |
60 | case 3: |
61 | case 4: | |
62 | case 5: | |
b3b97473 JZ |
63 | ret = on ? pm8606_osc_enable(chip, RGB2_ENABLE) : |
64 | pm8606_osc_disable(chip, RGB2_ENABLE); | |
65 | break; | |
66 | } | |
67 | return ret; | |
68 | } | |
69 | ||
8824fefb AL |
70 | static int pm860x_led_set(struct led_classdev *cdev, |
71 | enum led_brightness value) | |
0a2f915b | 72 | { |
8824fefb | 73 | struct pm860x_led *led = container_of(cdev, struct pm860x_led, cdev); |
f5d59fc5 | 74 | struct pm860x_chip *chip; |
3154c344 | 75 | unsigned char buf[3]; |
894fc8f2 | 76 | int ret; |
f5d59fc5 | 77 | |
f5d59fc5 | 78 | chip = led->chip; |
0a2f915b | 79 | mutex_lock(&led->lock); |
8824fefb AL |
80 | led->brightness = value >> 3; |
81 | ||
f5d59fc5 | 82 | if ((led->current_brightness == 0) && led->brightness) { |
b3b97473 | 83 | led_power_set(chip, led->port, 1); |
f5d59fc5 | 84 | if (led->iset) { |
894fc8f2 | 85 | pm860x_set_bits(led->i2c, led->reg_control, |
f5d59fc5 | 86 | LED_CURRENT_MASK, led->iset); |
0a2f915b | 87 | } |
894fc8f2 | 88 | pm860x_set_bits(led->i2c, led->reg_blink, |
3154c344 | 89 | LED_BLINK_MASK, LED_ON_CONTINUOUS); |
894fc8f2 HZ |
90 | pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask, |
91 | led->blink_mask); | |
0a2f915b | 92 | } |
894fc8f2 | 93 | pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK, |
f5d59fc5 | 94 | led->brightness); |
3154c344 HZ |
95 | |
96 | if (led->brightness == 0) { | |
894fc8f2 | 97 | pm860x_bulk_read(led->i2c, led->reg_control, 3, buf); |
3154c344 HZ |
98 | ret = buf[0] & LED_PWM_MASK; |
99 | ret |= buf[1] & LED_PWM_MASK; | |
100 | ret |= buf[2] & LED_PWM_MASK; | |
101 | if (ret == 0) { | |
102 | /* unset current since no led is lighting */ | |
894fc8f2 | 103 | pm860x_set_bits(led->i2c, led->reg_control, |
3154c344 | 104 | LED_CURRENT_MASK, 0); |
894fc8f2 HZ |
105 | pm860x_set_bits(led->i2c, PM8606_WLED3B, |
106 | led->blink_mask, 0); | |
b3b97473 | 107 | led_power_set(chip, led->port, 0); |
3154c344 HZ |
108 | } |
109 | } | |
f5d59fc5 HZ |
110 | led->current_brightness = led->brightness; |
111 | dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n", | |
894fc8f2 | 112 | led->reg_control, led->brightness); |
0a2f915b | 113 | mutex_unlock(&led->lock); |
0a2f915b | 114 | |
8824fefb | 115 | return 0; |
0a2f915b HZ |
116 | } |
117 | ||
2e57d567 HZ |
118 | #ifdef CONFIG_OF |
119 | static int pm860x_led_dt_init(struct platform_device *pdev, | |
120 | struct pm860x_led *data) | |
121 | { | |
61d4eb27 | 122 | struct device_node *nproot, *np; |
2e57d567 | 123 | int iset = 0; |
61d4eb27 | 124 | |
1175d5bc | 125 | if (!pdev->dev.parent->of_node) |
2e57d567 | 126 | return -ENODEV; |
1175d5bc | 127 | nproot = of_get_child_by_name(pdev->dev.parent->of_node, "leds"); |
2e57d567 HZ |
128 | if (!nproot) { |
129 | dev_err(&pdev->dev, "failed to find leds node\n"); | |
130 | return -ENODEV; | |
131 | } | |
132 | for_each_child_of_node(nproot, np) { | |
133 | if (!of_node_cmp(np->name, data->name)) { | |
134 | of_property_read_u32(np, "marvell,88pm860x-iset", | |
135 | &iset); | |
136 | data->iset = PM8606_LED_CURRENT(iset); | |
ffdc307d | 137 | of_node_put(np); |
2e57d567 HZ |
138 | break; |
139 | } | |
140 | } | |
61d4eb27 | 141 | of_node_put(nproot); |
2e57d567 HZ |
142 | return 0; |
143 | } | |
144 | #else | |
145 | #define pm860x_led_dt_init(x, y) (-1) | |
146 | #endif | |
147 | ||
0a2f915b HZ |
148 | static int pm860x_led_probe(struct platform_device *pdev) |
149 | { | |
150 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
87aae1ea | 151 | struct pm860x_led_pdata *pdata = dev_get_platdata(&pdev->dev); |
0a2f915b HZ |
152 | struct pm860x_led *data; |
153 | struct resource *res; | |
894fc8f2 | 154 | int ret = 0; |
0a2f915b | 155 | |
b523cfe6 | 156 | data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL); |
0a2f915b HZ |
157 | if (data == NULL) |
158 | return -ENOMEM; | |
894fc8f2 HZ |
159 | res = platform_get_resource_byname(pdev, IORESOURCE_REG, "control"); |
160 | if (!res) { | |
161 | dev_err(&pdev->dev, "No REG resource for control\n"); | |
3651c4b9 | 162 | return -ENXIO; |
894fc8f2 HZ |
163 | } |
164 | data->reg_control = res->start; | |
165 | res = platform_get_resource_byname(pdev, IORESOURCE_REG, "blink"); | |
166 | if (!res) { | |
167 | dev_err(&pdev->dev, "No REG resource for blink\n"); | |
3651c4b9 | 168 | return -ENXIO; |
894fc8f2 HZ |
169 | } |
170 | data->reg_blink = res->start; | |
171 | memset(data->name, 0, MFD_NAME_SIZE); | |
172 | switch (pdev->id) { | |
173 | case 0: | |
174 | data->blink_mask = LED1_BLINK_EN; | |
175 | sprintf(data->name, "led0-red"); | |
176 | break; | |
177 | case 1: | |
178 | data->blink_mask = LED1_BLINK_EN; | |
179 | sprintf(data->name, "led0-green"); | |
180 | break; | |
181 | case 2: | |
182 | data->blink_mask = LED1_BLINK_EN; | |
183 | sprintf(data->name, "led0-blue"); | |
184 | break; | |
185 | case 3: | |
186 | data->blink_mask = LED2_BLINK_EN; | |
187 | sprintf(data->name, "led1-red"); | |
188 | break; | |
189 | case 4: | |
190 | data->blink_mask = LED2_BLINK_EN; | |
191 | sprintf(data->name, "led1-green"); | |
192 | break; | |
193 | case 5: | |
194 | data->blink_mask = LED2_BLINK_EN; | |
195 | sprintf(data->name, "led1-blue"); | |
196 | break; | |
197 | } | |
84196a2f | 198 | platform_set_drvdata(pdev, data); |
0a2f915b HZ |
199 | data->chip = chip; |
200 | data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion; | |
894fc8f2 | 201 | data->port = pdev->id; |
2e57d567 HZ |
202 | if (pm860x_led_dt_init(pdev, data)) |
203 | if (pdata) | |
204 | data->iset = pdata->iset; | |
0a2f915b HZ |
205 | |
206 | data->current_brightness = 0; | |
207 | data->cdev.name = data->name; | |
8824fefb | 208 | data->cdev.brightness_set_blocking = pm860x_led_set; |
0a2f915b | 209 | mutex_init(&data->lock); |
0a2f915b HZ |
210 | |
211 | ret = led_classdev_register(chip->dev, &data->cdev); | |
212 | if (ret < 0) { | |
213 | dev_err(&pdev->dev, "Failed to register LED: %d\n", ret); | |
b523cfe6 | 214 | return ret; |
0a2f915b | 215 | } |
3154c344 | 216 | pm860x_led_set(&data->cdev, 0); |
0a2f915b | 217 | return 0; |
0a2f915b HZ |
218 | } |
219 | ||
220 | static int pm860x_led_remove(struct platform_device *pdev) | |
221 | { | |
222 | struct pm860x_led *data = platform_get_drvdata(pdev); | |
223 | ||
224 | led_classdev_unregister(&data->cdev); | |
0a2f915b HZ |
225 | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static struct platform_driver pm860x_led_driver = { | |
230 | .driver = { | |
231 | .name = "88pm860x-led", | |
0a2f915b HZ |
232 | }, |
233 | .probe = pm860x_led_probe, | |
234 | .remove = pm860x_led_remove, | |
235 | }; | |
236 | ||
892a8843 | 237 | module_platform_driver(pm860x_led_driver); |
0a2f915b HZ |
238 | |
239 | MODULE_DESCRIPTION("LED driver for Marvell PM860x"); | |
240 | MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); | |
241 | MODULE_LICENSE("GPL"); | |
242 | MODULE_ALIAS("platform:88pm860x-led"); |