1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * LEDs driver for Dialog Semiconductor DA9030/DA9034 |
4 | * |
5 | * Copyright (C) 2008 Compulab, Ltd. |
6 | * Mike Rapoport <mike@compulab.co.il> |
7 | * |
8 | * Copyright (C) 2006-2008 Marvell International Ltd. |
9 | * Eric Miao <eric.miao@marvell.com> |
10 | */ |
11 | |
12 | #include <linux/module.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/leds.h> |
16 | #include <linux/mfd/da903x.h> |
17 | #include <linux/slab.h> |
18 | |
19 | #define DA9030_LED1_CONTROL 0x20 |
20 | #define DA9030_LED2_CONTROL 0x21 |
21 | #define DA9030_LED3_CONTROL 0x22 |
22 | #define DA9030_LED4_CONTROL 0x23 |
23 | #define DA9030_LEDPC_CONTROL 0x24 |
24 | #define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */ |
25 | |
26 | #define DA9034_LED1_CONTROL 0x35 |
27 | #define DA9034_LED2_CONTROL 0x36 |
28 | #define DA9034_VIBRA 0x40 |
29 | |
30 | struct da903x_led { |
31 | struct led_classdev cdev; |
32 | struct device *master; |
33 | int id; |
34 | int flags; |
35 | }; |
36 | |
37 | #define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1) |
38 | #define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1) |
39 | |
40 | static int da903x_led_set(struct led_classdev *led_cdev, |
41 | enum led_brightness value) |
42 | { |
43 | struct da903x_led *led = |
44 | container_of(led_cdev, struct da903x_led, cdev); |
45 | uint8_t val; |
46 | int offset, ret = -EINVAL; |
47 | |
48 | switch (led->id) { |
49 | case DA9030_ID_LED_1: |
50 | case DA9030_ID_LED_2: |
51 | case DA9030_ID_LED_3: |
52 | case DA9030_ID_LED_4: |
53 | case DA9030_ID_LED_PC: |
54 | offset = DA9030_LED_OFFSET(led->id); |
55 | val = led->flags & ~0x87; |
56 | val |= value ? 0x80 : 0; /* EN bit */ |
57 | val |= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */ |
58 | ret = da903x_write(dev: led->master, DA9030_LED1_CONTROL + offset, |
59 | val); |
60 | break; |
61 | case DA9030_ID_VIBRA: |
62 | val = led->flags & ~0x80; |
63 | val |= value ? 0x80 : 0; /* EN bit */ |
64 | ret = da903x_write(dev: led->master, DA9030_MISC_CONTROL_A, val); |
65 | break; |
66 | case DA9034_ID_LED_1: |
67 | case DA9034_ID_LED_2: |
68 | offset = DA9034_LED_OFFSET(led->id); |
69 | val = (value * 0x5f / LED_FULL) & 0x7f; |
70 | val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0; |
71 | ret = da903x_write(dev: led->master, DA9034_LED1_CONTROL + offset, |
72 | val); |
73 | break; |
74 | case DA9034_ID_VIBRA: |
75 | val = value & 0xfe; |
76 | ret = da903x_write(dev: led->master, DA9034_VIBRA, val); |
77 | break; |
78 | } |
79 | |
80 | return ret; |
81 | } |
82 | |
83 | static int da903x_led_probe(struct platform_device *pdev) |
84 | { |
85 | struct led_info *pdata = dev_get_platdata(dev: &pdev->dev); |
86 | struct da903x_led *led; |
87 | int id, ret; |
88 | |
89 | if (pdata == NULL) |
90 | return 0; |
91 | |
92 | id = pdev->id; |
93 | |
94 | if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) || |
95 | (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) { |
96 | dev_err(&pdev->dev, "invalid LED ID (%d) specified\n" , id); |
97 | return -EINVAL; |
98 | } |
99 | |
100 | led = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct da903x_led), GFP_KERNEL); |
101 | if (!led) |
102 | return -ENOMEM; |
103 | |
104 | led->cdev.name = pdata->name; |
105 | led->cdev.default_trigger = pdata->default_trigger; |
106 | led->cdev.brightness_set_blocking = da903x_led_set; |
107 | led->cdev.brightness = LED_OFF; |
108 | |
109 | led->id = id; |
110 | led->flags = pdata->flags; |
111 | led->master = pdev->dev.parent; |
112 | |
113 | ret = led_classdev_register(parent: led->master, led_cdev: &led->cdev); |
114 | if (ret) { |
115 | dev_err(&pdev->dev, "failed to register LED %d\n" , id); |
116 | return ret; |
117 | } |
118 | |
119 | platform_set_drvdata(pdev, data: led); |
120 | |
121 | return 0; |
122 | } |
123 | |
124 | static void da903x_led_remove(struct platform_device *pdev) |
125 | { |
126 | struct da903x_led *led = platform_get_drvdata(pdev); |
127 | |
128 | led_classdev_unregister(led_cdev: &led->cdev); |
129 | } |
130 | |
131 | static struct platform_driver da903x_led_driver = { |
132 | .driver = { |
133 | .name = "da903x-led" , |
134 | }, |
135 | .probe = da903x_led_probe, |
136 | .remove_new = da903x_led_remove, |
137 | }; |
138 | |
139 | module_platform_driver(da903x_led_driver); |
140 | |
141 | MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034" ); |
142 | MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>" ); |
143 | MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>" ); |
144 | MODULE_LICENSE("GPL" ); |
145 | MODULE_ALIAS("platform:da903x-led" ); |
146 | |