Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
0a2f915b HZ |
2 | /* |
3 | * LED driver for Marvell 88PM860x | |
4 | * | |
5 | * Copyright (C) 2009 Marvell International Ltd. | |
6 | * Haojian Zhuang <haojian.zhuang@marvell.com> | |
0a2f915b HZ |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
2e57d567 | 10 | #include <linux/of.h> |
0a2f915b HZ |
11 | #include <linux/platform_device.h> |
12 | #include <linux/i2c.h> | |
13 | #include <linux/leds.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
0a2f915b | 15 | #include <linux/mfd/88pm860x.h> |
54f4dedb | 16 | #include <linux/module.h> |
0a2f915b | 17 | |
0a2f915b HZ |
18 | #define LED_PWM_MASK (0x1F) |
19 | #define LED_CURRENT_MASK (0x07 << 5) | |
20 | ||
0a2f915b HZ |
21 | #define LED_BLINK_MASK (0x7F) |
22 | ||
f5d59fc5 | 23 | #define LED_ON_CONTINUOUS (0x0F << 3) |
0a2f915b HZ |
24 | |
25 | #define LED1_BLINK_EN (1 << 1) | |
26 | #define LED2_BLINK_EN (1 << 2) | |
27 | ||
0a2f915b HZ |
28 | struct pm860x_led { |
29 | struct led_classdev cdev; | |
30 | struct i2c_client *i2c; | |
0a2f915b HZ |
31 | struct pm860x_chip *chip; |
32 | struct mutex lock; | |
33 | char name[MFD_NAME_SIZE]; | |
34 | ||
35 | int port; | |
36 | int iset; | |
0a2f915b HZ |
37 | unsigned char brightness; |
38 | unsigned char current_brightness; | |
39 | ||
894fc8f2 HZ |
40 | int reg_control; |
41 | int reg_blink; | |
42 | int blink_mask; | |
0a2f915b HZ |
43 | }; |
44 | ||
b3b97473 JZ |
45 | static int led_power_set(struct pm860x_chip *chip, int port, int on) |
46 | { | |
47 | int ret = -EINVAL; | |
48 | ||
49 | switch (port) { | |
894fc8f2 HZ |
50 | case 0: |
51 | case 1: | |
52 | case 2: | |
b3b97473 JZ |
53 | ret = on ? pm8606_osc_enable(chip, RGB1_ENABLE) : |
54 | pm8606_osc_disable(chip, RGB1_ENABLE); | |
55 | break; | |
894fc8f2 HZ |
56 | case 3: |
57 | case 4: | |
58 | case 5: | |
b3b97473 JZ |
59 | ret = on ? pm8606_osc_enable(chip, RGB2_ENABLE) : |
60 | pm8606_osc_disable(chip, RGB2_ENABLE); | |
61 | break; | |
62 | } | |
63 | return ret; | |
64 | } | |
65 | ||
8824fefb AL |
66 | static int pm860x_led_set(struct led_classdev *cdev, |
67 | enum led_brightness value) | |
0a2f915b | 68 | { |
8824fefb | 69 | struct pm860x_led *led = container_of(cdev, struct pm860x_led, cdev); |
f5d59fc5 | 70 | struct pm860x_chip *chip; |
3154c344 | 71 | unsigned char buf[3]; |
894fc8f2 | 72 | int ret; |
f5d59fc5 | 73 | |
f5d59fc5 | 74 | chip = led->chip; |
0a2f915b | 75 | mutex_lock(&led->lock); |
8824fefb AL |
76 | led->brightness = value >> 3; |
77 | ||
f5d59fc5 | 78 | if ((led->current_brightness == 0) && led->brightness) { |
b3b97473 | 79 | led_power_set(chip, led->port, 1); |
f5d59fc5 | 80 | if (led->iset) { |
894fc8f2 | 81 | pm860x_set_bits(led->i2c, led->reg_control, |
f5d59fc5 | 82 | LED_CURRENT_MASK, led->iset); |
0a2f915b | 83 | } |
894fc8f2 | 84 | pm860x_set_bits(led->i2c, led->reg_blink, |
3154c344 | 85 | LED_BLINK_MASK, LED_ON_CONTINUOUS); |
894fc8f2 HZ |
86 | pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask, |
87 | led->blink_mask); | |
0a2f915b | 88 | } |
894fc8f2 | 89 | pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK, |
f5d59fc5 | 90 | led->brightness); |
3154c344 HZ |
91 | |
92 | if (led->brightness == 0) { | |
894fc8f2 | 93 | pm860x_bulk_read(led->i2c, led->reg_control, 3, buf); |
3154c344 HZ |
94 | ret = buf[0] & LED_PWM_MASK; |
95 | ret |= buf[1] & LED_PWM_MASK; | |
96 | ret |= buf[2] & LED_PWM_MASK; | |
97 | if (ret == 0) { | |
98 | /* unset current since no led is lighting */ | |
894fc8f2 | 99 | pm860x_set_bits(led->i2c, led->reg_control, |
3154c344 | 100 | LED_CURRENT_MASK, 0); |
894fc8f2 HZ |
101 | pm860x_set_bits(led->i2c, PM8606_WLED3B, |
102 | led->blink_mask, 0); | |
b3b97473 | 103 | led_power_set(chip, led->port, 0); |
3154c344 HZ |
104 | } |
105 | } | |
f5d59fc5 HZ |
106 | led->current_brightness = led->brightness; |
107 | dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n", | |
894fc8f2 | 108 | led->reg_control, led->brightness); |
0a2f915b | 109 | mutex_unlock(&led->lock); |
0a2f915b | 110 | |
8824fefb | 111 | return 0; |
0a2f915b HZ |
112 | } |
113 | ||
2e57d567 HZ |
114 | #ifdef CONFIG_OF |
115 | static int pm860x_led_dt_init(struct platform_device *pdev, | |
116 | struct pm860x_led *data) | |
117 | { | |
61d4eb27 | 118 | struct device_node *nproot, *np; |
2e57d567 | 119 | int iset = 0; |
61d4eb27 | 120 | |
1175d5bc | 121 | if (!pdev->dev.parent->of_node) |
2e57d567 | 122 | return -ENODEV; |
1175d5bc | 123 | nproot = of_get_child_by_name(pdev->dev.parent->of_node, "leds"); |
2e57d567 HZ |
124 | if (!nproot) { |
125 | dev_err(&pdev->dev, "failed to find leds node\n"); | |
126 | return -ENODEV; | |
127 | } | |
128 | for_each_child_of_node(nproot, np) { | |
555fc5ba | 129 | if (of_node_name_eq(np, data->name)) { |
2e57d567 HZ |
130 | of_property_read_u32(np, "marvell,88pm860x-iset", |
131 | &iset); | |
132 | data->iset = PM8606_LED_CURRENT(iset); | |
ffdc307d | 133 | of_node_put(np); |
2e57d567 HZ |
134 | break; |
135 | } | |
136 | } | |
61d4eb27 | 137 | of_node_put(nproot); |
2e57d567 HZ |
138 | return 0; |
139 | } | |
140 | #else | |
141 | #define pm860x_led_dt_init(x, y) (-1) | |
142 | #endif | |
143 | ||
0a2f915b HZ |
144 | static int pm860x_led_probe(struct platform_device *pdev) |
145 | { | |
146 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
87aae1ea | 147 | struct pm860x_led_pdata *pdata = dev_get_platdata(&pdev->dev); |
0a2f915b HZ |
148 | struct pm860x_led *data; |
149 | struct resource *res; | |
894fc8f2 | 150 | int ret = 0; |
0a2f915b | 151 | |
b523cfe6 | 152 | data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL); |
0a2f915b HZ |
153 | if (data == NULL) |
154 | return -ENOMEM; | |
894fc8f2 HZ |
155 | res = platform_get_resource_byname(pdev, IORESOURCE_REG, "control"); |
156 | if (!res) { | |
157 | dev_err(&pdev->dev, "No REG resource for control\n"); | |
3651c4b9 | 158 | return -ENXIO; |
894fc8f2 HZ |
159 | } |
160 | data->reg_control = res->start; | |
161 | res = platform_get_resource_byname(pdev, IORESOURCE_REG, "blink"); | |
162 | if (!res) { | |
163 | dev_err(&pdev->dev, "No REG resource for blink\n"); | |
3651c4b9 | 164 | return -ENXIO; |
894fc8f2 HZ |
165 | } |
166 | data->reg_blink = res->start; | |
167 | memset(data->name, 0, MFD_NAME_SIZE); | |
168 | switch (pdev->id) { | |
169 | case 0: | |
170 | data->blink_mask = LED1_BLINK_EN; | |
171 | sprintf(data->name, "led0-red"); | |
172 | break; | |
173 | case 1: | |
174 | data->blink_mask = LED1_BLINK_EN; | |
175 | sprintf(data->name, "led0-green"); | |
176 | break; | |
177 | case 2: | |
178 | data->blink_mask = LED1_BLINK_EN; | |
179 | sprintf(data->name, "led0-blue"); | |
180 | break; | |
181 | case 3: | |
182 | data->blink_mask = LED2_BLINK_EN; | |
183 | sprintf(data->name, "led1-red"); | |
184 | break; | |
185 | case 4: | |
186 | data->blink_mask = LED2_BLINK_EN; | |
187 | sprintf(data->name, "led1-green"); | |
188 | break; | |
189 | case 5: | |
190 | data->blink_mask = LED2_BLINK_EN; | |
191 | sprintf(data->name, "led1-blue"); | |
192 | break; | |
193 | } | |
0a2f915b HZ |
194 | data->chip = chip; |
195 | data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion; | |
894fc8f2 | 196 | data->port = pdev->id; |
2e57d567 HZ |
197 | if (pm860x_led_dt_init(pdev, data)) |
198 | if (pdata) | |
199 | data->iset = pdata->iset; | |
0a2f915b HZ |
200 | |
201 | data->current_brightness = 0; | |
202 | data->cdev.name = data->name; | |
8824fefb | 203 | data->cdev.brightness_set_blocking = pm860x_led_set; |
0a2f915b | 204 | mutex_init(&data->lock); |
0a2f915b | 205 | |
375446df | 206 | ret = devm_led_classdev_register(chip->dev, &data->cdev); |
0a2f915b HZ |
207 | if (ret < 0) { |
208 | dev_err(&pdev->dev, "Failed to register LED: %d\n", ret); | |
b523cfe6 | 209 | return ret; |
0a2f915b | 210 | } |
3154c344 | 211 | pm860x_led_set(&data->cdev, 0); |
0a2f915b | 212 | return 0; |
0a2f915b HZ |
213 | } |
214 | ||
0a2f915b HZ |
215 | |
216 | static struct platform_driver pm860x_led_driver = { | |
217 | .driver = { | |
218 | .name = "88pm860x-led", | |
0a2f915b HZ |
219 | }, |
220 | .probe = pm860x_led_probe, | |
0a2f915b HZ |
221 | }; |
222 | ||
892a8843 | 223 | module_platform_driver(pm860x_led_driver); |
0a2f915b HZ |
224 | |
225 | MODULE_DESCRIPTION("LED driver for Marvell PM860x"); | |
226 | MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); | |
227 | MODULE_LICENSE("GPL"); | |
228 | MODULE_ALIAS("platform:88pm860x-led"); |