Commit | Line | Data |
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80503b23 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ed4a10b4 MH |
2 | /* |
3 | * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs | |
4 | * | |
5 | * Copyright 2009 Analog Devices Inc. | |
6 | * | |
7 | * Loosely derived from leds-da903x: | |
8 | * Copyright (C) 2008 Compulab, Ltd. | |
ef734162 | 9 | * Mike Rapoport <mike@compulab.co.il> |
ed4a10b4 MH |
10 | * |
11 | * Copyright (C) 2006-2008 Marvell International Ltd. | |
ef734162 | 12 | * Eric Miao <eric.miao@marvell.com> |
ed4a10b4 MH |
13 | */ |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/kernel.h> | |
ed4a10b4 MH |
17 | #include <linux/platform_device.h> |
18 | #include <linux/leds.h> | |
ed4a10b4 | 19 | #include <linux/mfd/adp5520.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
ed4a10b4 MH |
21 | |
22 | struct adp5520_led { | |
23 | struct led_classdev cdev; | |
ed4a10b4 | 24 | struct device *master; |
ed4a10b4 MH |
25 | int id; |
26 | int flags; | |
27 | }; | |
28 | ||
64d44e5a | 29 | static int adp5520_led_set(struct led_classdev *led_cdev, |
ed4a10b4 MH |
30 | enum led_brightness value) |
31 | { | |
32 | struct adp5520_led *led; | |
33 | ||
34 | led = container_of(led_cdev, struct adp5520_led, cdev); | |
64d44e5a AL |
35 | return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1, |
36 | value >> 2); | |
ed4a10b4 MH |
37 | } |
38 | ||
39 | static int adp5520_led_setup(struct adp5520_led *led) | |
40 | { | |
41 | struct device *dev = led->master; | |
42 | int flags = led->flags; | |
43 | int ret = 0; | |
44 | ||
45 | switch (led->id) { | |
46 | case FLAG_ID_ADP5520_LED1_ADP5501_LED0: | |
47 | ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, | |
48 | (flags >> ADP5520_FLAG_OFFT_SHIFT) & | |
49 | ADP5520_FLAG_OFFT_MASK); | |
50 | ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, | |
51 | ADP5520_LED1_EN); | |
52 | break; | |
53 | case FLAG_ID_ADP5520_LED2_ADP5501_LED1: | |
54 | ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, | |
55 | ((flags >> ADP5520_FLAG_OFFT_SHIFT) & | |
56 | ADP5520_FLAG_OFFT_MASK) << 2); | |
57 | ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL, | |
58 | ADP5520_R3_MODE); | |
59 | ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, | |
60 | ADP5520_LED2_EN); | |
61 | break; | |
62 | case FLAG_ID_ADP5520_LED3_ADP5501_LED2: | |
63 | ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, | |
64 | ((flags >> ADP5520_FLAG_OFFT_SHIFT) & | |
65 | ADP5520_FLAG_OFFT_MASK) << 4); | |
66 | ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL, | |
67 | ADP5520_C3_MODE); | |
68 | ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, | |
69 | ADP5520_LED3_EN); | |
70 | break; | |
71 | } | |
72 | ||
73 | return ret; | |
74 | } | |
75 | ||
98ea1ea2 | 76 | static int adp5520_led_prepare(struct platform_device *pdev) |
ed4a10b4 | 77 | { |
87aae1ea | 78 | struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
ed4a10b4 MH |
79 | struct device *dev = pdev->dev.parent; |
80 | int ret = 0; | |
81 | ||
82 | ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0); | |
83 | ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0); | |
84 | ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0); | |
85 | ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6); | |
86 | ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in, | |
87 | pdata->fade_out)); | |
88 | ||
89 | return ret; | |
90 | } | |
91 | ||
98ea1ea2 | 92 | static int adp5520_led_probe(struct platform_device *pdev) |
ed4a10b4 | 93 | { |
87aae1ea | 94 | struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
ed4a10b4 MH |
95 | struct adp5520_led *led, *led_dat; |
96 | struct led_info *cur_led; | |
97 | int ret, i; | |
98 | ||
99 | if (pdata == NULL) { | |
100 | dev_err(&pdev->dev, "missing platform data\n"); | |
101 | return -ENODEV; | |
102 | } | |
103 | ||
104 | if (pdata->num_leds > ADP5520_01_MAXLEDS) { | |
105 | dev_err(&pdev->dev, "can't handle more than %d LEDS\n", | |
106 | ADP5520_01_MAXLEDS); | |
107 | return -EFAULT; | |
108 | } | |
109 | ||
a86854d0 | 110 | led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led), |
bcbf0162 | 111 | GFP_KERNEL); |
0c9a03b6 | 112 | if (!led) |
ed4a10b4 | 113 | return -ENOMEM; |
ed4a10b4 MH |
114 | |
115 | ret = adp5520_led_prepare(pdev); | |
ed4a10b4 MH |
116 | if (ret) { |
117 | dev_err(&pdev->dev, "failed to write\n"); | |
bcbf0162 | 118 | return ret; |
ed4a10b4 MH |
119 | } |
120 | ||
121 | for (i = 0; i < pdata->num_leds; ++i) { | |
122 | cur_led = &pdata->leds[i]; | |
123 | led_dat = &led[i]; | |
124 | ||
125 | led_dat->cdev.name = cur_led->name; | |
126 | led_dat->cdev.default_trigger = cur_led->default_trigger; | |
64d44e5a | 127 | led_dat->cdev.brightness_set_blocking = adp5520_led_set; |
ed4a10b4 MH |
128 | led_dat->cdev.brightness = LED_OFF; |
129 | ||
130 | if (cur_led->flags & ADP5520_FLAG_LED_MASK) | |
131 | led_dat->flags = cur_led->flags; | |
132 | else | |
133 | led_dat->flags = i + 1; | |
134 | ||
135 | led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK; | |
136 | ||
137 | led_dat->master = pdev->dev.parent; | |
ed4a10b4 MH |
138 | |
139 | ret = led_classdev_register(led_dat->master, &led_dat->cdev); | |
140 | if (ret) { | |
141 | dev_err(&pdev->dev, "failed to register LED %d\n", | |
142 | led_dat->id); | |
143 | goto err; | |
144 | } | |
145 | ||
146 | ret = adp5520_led_setup(led_dat); | |
147 | if (ret) { | |
148 | dev_err(&pdev->dev, "failed to write\n"); | |
149 | i++; | |
150 | goto err; | |
151 | } | |
152 | } | |
153 | ||
154 | platform_set_drvdata(pdev, led); | |
155 | return 0; | |
156 | ||
157 | err: | |
158 | if (i > 0) { | |
64d44e5a | 159 | for (i = i - 1; i >= 0; i--) |
ed4a10b4 | 160 | led_classdev_unregister(&led[i].cdev); |
ed4a10b4 MH |
161 | } |
162 | ||
ed4a10b4 MH |
163 | return ret; |
164 | } | |
165 | ||
60613020 | 166 | static void adp5520_led_remove(struct platform_device *pdev) |
ed4a10b4 | 167 | { |
87aae1ea | 168 | struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
ed4a10b4 MH |
169 | struct adp5520_led *led; |
170 | int i; | |
171 | ||
172 | led = platform_get_drvdata(pdev); | |
173 | ||
174 | adp5520_clr_bits(led->master, ADP5520_LED_CONTROL, | |
175 | ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN); | |
176 | ||
177 | for (i = 0; i < pdata->num_leds; i++) { | |
178 | led_classdev_unregister(&led[i].cdev); | |
ed4a10b4 | 179 | } |
ed4a10b4 MH |
180 | } |
181 | ||
182 | static struct platform_driver adp5520_led_driver = { | |
183 | .driver = { | |
184 | .name = "adp5520-led", | |
ed4a10b4 MH |
185 | }, |
186 | .probe = adp5520_led_probe, | |
60613020 | 187 | .remove_new = adp5520_led_remove, |
ed4a10b4 MH |
188 | }; |
189 | ||
892a8843 | 190 | module_platform_driver(adp5520_led_driver); |
ed4a10b4 MH |
191 | |
192 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
193 | MODULE_DESCRIPTION("LEDS ADP5520(01) Driver"); | |
194 | MODULE_LICENSE("GPL"); | |
195 | MODULE_ALIAS("platform:adp5520-led"); |