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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
30struct 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
40static 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(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(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(led->master, DA9034_LED1_CONTROL + offset,
72 val);
73 break;
74 case DA9034_ID_VIBRA:
75 val = value & 0xfe;
76 ret = da903x_write(led->master, DA9034_VIBRA, val);
77 break;
78 }
79
80 return ret;
81}
82
83static int da903x_led_probe(struct platform_device *pdev)
84{
85 struct led_info *pdata = dev_get_platdata(&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(&pdev->dev, 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(led->master, &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, led);
120
121 return 0;
122}
123
124static int da903x_led_remove(struct platform_device *pdev)
125{
126 struct da903x_led *led = platform_get_drvdata(pdev);
127
128 led_classdev_unregister(&led->cdev);
129
130 return 0;
131}
132
133static struct platform_driver da903x_led_driver = {
134 .driver = {
135 .name = "da903x-led",
136 },
137 .probe = da903x_led_probe,
138 .remove = da903x_led_remove,
139};
140
141module_platform_driver(da903x_led_driver);
142
143MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
144MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
145MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
146MODULE_LICENSE("GPL");
147MODULE_ALIAS("platform:da903x-led");
1/*
2 * LEDs driver for Dialog Semiconductor DA9030/DA9034
3 *
4 * Copyright (C) 2008 Compulab, Ltd.
5 * Mike Rapoport <mike@compulab.co.il>
6 *
7 * Copyright (C) 2006-2008 Marvell International Ltd.
8 * Eric Miao <eric.miao@marvell.com>
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>
17#include <linux/platform_device.h>
18#include <linux/leds.h>
19#include <linux/mfd/da903x.h>
20#include <linux/slab.h>
21
22#define DA9030_LED1_CONTROL 0x20
23#define DA9030_LED2_CONTROL 0x21
24#define DA9030_LED3_CONTROL 0x22
25#define DA9030_LED4_CONTROL 0x23
26#define DA9030_LEDPC_CONTROL 0x24
27#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */
28
29#define DA9034_LED1_CONTROL 0x35
30#define DA9034_LED2_CONTROL 0x36
31#define DA9034_VIBRA 0x40
32
33struct da903x_led {
34 struct led_classdev cdev;
35 struct device *master;
36 int id;
37 int flags;
38};
39
40#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
41#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)
42
43static int da903x_led_set(struct led_classdev *led_cdev,
44 enum led_brightness value)
45{
46 struct da903x_led *led =
47 container_of(led_cdev, struct da903x_led, cdev);
48 uint8_t val;
49 int offset, ret = -EINVAL;
50
51 switch (led->id) {
52 case DA9030_ID_LED_1:
53 case DA9030_ID_LED_2:
54 case DA9030_ID_LED_3:
55 case DA9030_ID_LED_4:
56 case DA9030_ID_LED_PC:
57 offset = DA9030_LED_OFFSET(led->id);
58 val = led->flags & ~0x87;
59 val |= value ? 0x80 : 0; /* EN bit */
60 val |= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */
61 ret = da903x_write(led->master, DA9030_LED1_CONTROL + offset,
62 val);
63 break;
64 case DA9030_ID_VIBRA:
65 val = led->flags & ~0x80;
66 val |= value ? 0x80 : 0; /* EN bit */
67 ret = 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 = (value * 0x5f / LED_FULL) & 0x7f;
73 val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
74 ret = da903x_write(led->master, DA9034_LED1_CONTROL + offset,
75 val);
76 break;
77 case DA9034_ID_VIBRA:
78 val = value & 0xfe;
79 ret = da903x_write(led->master, DA9034_VIBRA, val);
80 break;
81 }
82
83 return ret;
84}
85
86static int da903x_led_probe(struct platform_device *pdev)
87{
88 struct led_info *pdata = dev_get_platdata(&pdev->dev);
89 struct da903x_led *led;
90 int id, ret;
91
92 if (pdata == NULL)
93 return 0;
94
95 id = pdev->id;
96
97 if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) ||
98 (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
99 dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
100 return -EINVAL;
101 }
102
103 led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);
104 if (!led)
105 return -ENOMEM;
106
107 led->cdev.name = pdata->name;
108 led->cdev.default_trigger = pdata->default_trigger;
109 led->cdev.brightness_set_blocking = da903x_led_set;
110 led->cdev.brightness = LED_OFF;
111
112 led->id = id;
113 led->flags = pdata->flags;
114 led->master = pdev->dev.parent;
115
116 ret = devm_led_classdev_register(led->master, &led->cdev);
117 if (ret) {
118 dev_err(&pdev->dev, "failed to register LED %d\n", id);
119 return ret;
120 }
121
122 return 0;
123}
124
125static struct platform_driver da903x_led_driver = {
126 .driver = {
127 .name = "da903x-led",
128 },
129 .probe = da903x_led_probe,
130};
131
132module_platform_driver(da903x_led_driver);
133
134MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
135MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
136MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
137MODULE_LICENSE("GPL");
138MODULE_ALIAS("platform:da903x-led");