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1/*
2 * LEDs driver for Freescale MC13783/MC13892/MC34708
3 *
4 * Copyright (C) 2010 Philippe Rétornaz
5 *
6 * Based on leds-da903x:
7 * Copyright (C) 2008 Compulab, Ltd.
8 * Mike Rapoport <mike@compulab.co.il>
9 *
10 * Copyright (C) 2006-2008 Marvell International Ltd.
11 * Eric Miao <eric.miao@marvell.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/platform_device.h>
21#include <linux/leds.h>
22#include <linux/of.h>
23#include <linux/workqueue.h>
24#include <linux/mfd/mc13xxx.h>
25
26struct mc13xxx_led_devtype {
27 int led_min;
28 int led_max;
29 int num_regs;
30 u32 ledctrl_base;
31};
32
33struct mc13xxx_led {
34 struct led_classdev cdev;
35 struct work_struct work;
36 enum led_brightness new_brightness;
37 int id;
38 struct mc13xxx_leds *leds;
39};
40
41struct mc13xxx_leds {
42 struct mc13xxx *master;
43 struct mc13xxx_led_devtype *devtype;
44 int num_leds;
45 struct mc13xxx_led *led;
46};
47
48static unsigned int mc13xxx_max_brightness(int id)
49{
50 if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
51 return 0x0f;
52 else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
53 return 0x1f;
54
55 return 0x3f;
56}
57
58static void mc13xxx_led_work(struct work_struct *work)
59{
60 struct mc13xxx_led *led = container_of(work, struct mc13xxx_led, work);
61 struct mc13xxx_leds *leds = led->leds;
62 unsigned int reg, bank, off, shift;
63
64 switch (led->id) {
65 case MC13783_LED_MD:
66 case MC13783_LED_AD:
67 case MC13783_LED_KP:
68 reg = 2;
69 shift = 9 + (led->id - MC13783_LED_MD) * 4;
70 break;
71 case MC13783_LED_R1:
72 case MC13783_LED_G1:
73 case MC13783_LED_B1:
74 case MC13783_LED_R2:
75 case MC13783_LED_G2:
76 case MC13783_LED_B2:
77 case MC13783_LED_R3:
78 case MC13783_LED_G3:
79 case MC13783_LED_B3:
80 off = led->id - MC13783_LED_R1;
81 bank = off / 3;
82 reg = 3 + bank;
83 shift = (off - bank * 3) * 5 + 6;
84 break;
85 case MC13892_LED_MD:
86 case MC13892_LED_AD:
87 case MC13892_LED_KP:
88 reg = (led->id - MC13892_LED_MD) / 2;
89 shift = 3 + (led->id - MC13892_LED_MD) * 12;
90 break;
91 case MC13892_LED_R:
92 case MC13892_LED_G:
93 case MC13892_LED_B:
94 off = led->id - MC13892_LED_R;
95 bank = off / 2;
96 reg = 2 + bank;
97 shift = (off - bank * 2) * 12 + 3;
98 break;
99 case MC34708_LED_R:
100 case MC34708_LED_G:
101 reg = 0;
102 shift = 3 + (led->id - MC34708_LED_R) * 12;
103 break;
104 default:
105 BUG();
106 }
107
108 mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
109 mc13xxx_max_brightness(led->id) << shift,
110 led->new_brightness << shift);
111}
112
113static void mc13xxx_led_set(struct led_classdev *led_cdev,
114 enum led_brightness value)
115{
116 struct mc13xxx_led *led =
117 container_of(led_cdev, struct mc13xxx_led, cdev);
118
119 led->new_brightness = value;
120 schedule_work(&led->work);
121}
122
123#ifdef CONFIG_OF
124static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
125 struct platform_device *pdev)
126{
127 struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
128 struct mc13xxx_leds_platform_data *pdata;
129 struct device_node *parent, *child;
130 struct device *dev = &pdev->dev;
131 int i = 0, ret = -ENODATA;
132
133 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
134 if (!pdata)
135 return ERR_PTR(-ENOMEM);
136
137 of_node_get(dev->parent->of_node);
138
139 parent = of_find_node_by_name(dev->parent->of_node, "leds");
140 if (!parent)
141 goto out_node_put;
142
143 ret = of_property_read_u32_array(parent, "led-control",
144 pdata->led_control,
145 leds->devtype->num_regs);
146 if (ret)
147 goto out_node_put;
148
149 pdata->num_leds = of_get_child_count(parent);
150
151 pdata->led = devm_kzalloc(dev, pdata->num_leds * sizeof(*pdata->led),
152 GFP_KERNEL);
153 if (!pdata->led) {
154 ret = -ENOMEM;
155 goto out_node_put;
156 }
157
158 for_each_child_of_node(parent, child) {
159 const char *str;
160 u32 tmp;
161
162 if (of_property_read_u32(child, "reg", &tmp))
163 continue;
164 pdata->led[i].id = leds->devtype->led_min + tmp;
165
166 if (!of_property_read_string(child, "label", &str))
167 pdata->led[i].name = str;
168 if (!of_property_read_string(child, "linux,default-trigger",
169 &str))
170 pdata->led[i].default_trigger = str;
171
172 i++;
173 }
174
175 pdata->num_leds = i;
176 ret = i > 0 ? 0 : -ENODATA;
177
178out_node_put:
179 of_node_put(parent);
180
181 return ret ? ERR_PTR(ret) : pdata;
182}
183#else
184static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
185 struct platform_device *pdev)
186{
187 return ERR_PTR(-ENOSYS);
188}
189#endif
190
191static int __init mc13xxx_led_probe(struct platform_device *pdev)
192{
193 struct device *dev = &pdev->dev;
194 struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
195 struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
196 struct mc13xxx_led_devtype *devtype =
197 (struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
198 struct mc13xxx_leds *leds;
199 int i, id, ret = -ENODATA;
200 u32 init_led = 0;
201
202 leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
203 if (!leds)
204 return -ENOMEM;
205
206 leds->devtype = devtype;
207 leds->master = mcdev;
208 platform_set_drvdata(pdev, leds);
209
210 if (dev->parent->of_node) {
211 pdata = mc13xxx_led_probe_dt(pdev);
212 if (IS_ERR(pdata))
213 return PTR_ERR(pdata);
214 } else if (!pdata)
215 return -ENODATA;
216
217 leds->num_leds = pdata->num_leds;
218
219 if ((leds->num_leds < 1) ||
220 (leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
221 dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
222 return -EINVAL;
223 }
224
225 leds->led = devm_kzalloc(dev, leds->num_leds * sizeof(*leds->led),
226 GFP_KERNEL);
227 if (!leds->led)
228 return -ENOMEM;
229
230 for (i = 0; i < devtype->num_regs; i++) {
231 ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
232 pdata->led_control[i]);
233 if (ret)
234 return ret;
235 }
236
237 for (i = 0; i < leds->num_leds; i++) {
238 const char *name, *trig;
239
240 ret = -EINVAL;
241
242 id = pdata->led[i].id;
243 name = pdata->led[i].name;
244 trig = pdata->led[i].default_trigger;
245
246 if ((id > devtype->led_max) || (id < devtype->led_min)) {
247 dev_err(dev, "Invalid ID %i\n", id);
248 break;
249 }
250
251 if (init_led & (1 << id)) {
252 dev_warn(dev, "LED %i already initialized\n", id);
253 break;
254 }
255
256 init_led |= 1 << id;
257 leds->led[i].id = id;
258 leds->led[i].leds = leds;
259 leds->led[i].cdev.name = name;
260 leds->led[i].cdev.default_trigger = trig;
261 leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
262 leds->led[i].cdev.brightness_set = mc13xxx_led_set;
263 leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
264
265 INIT_WORK(&leds->led[i].work, mc13xxx_led_work);
266
267 ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
268 if (ret) {
269 dev_err(dev, "Failed to register LED %i\n", id);
270 break;
271 }
272 }
273
274 if (ret)
275 while (--i >= 0) {
276 led_classdev_unregister(&leds->led[i].cdev);
277 cancel_work_sync(&leds->led[i].work);
278 }
279
280 return ret;
281}
282
283static int mc13xxx_led_remove(struct platform_device *pdev)
284{
285 struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
286 int i;
287
288 for (i = 0; i < leds->num_leds; i++) {
289 led_classdev_unregister(&leds->led[i].cdev);
290 cancel_work_sync(&leds->led[i].work);
291 }
292
293 return 0;
294}
295
296static const struct mc13xxx_led_devtype mc13783_led_devtype = {
297 .led_min = MC13783_LED_MD,
298 .led_max = MC13783_LED_B3,
299 .num_regs = 6,
300 .ledctrl_base = 51,
301};
302
303static const struct mc13xxx_led_devtype mc13892_led_devtype = {
304 .led_min = MC13892_LED_MD,
305 .led_max = MC13892_LED_B,
306 .num_regs = 4,
307 .ledctrl_base = 51,
308};
309
310static const struct mc13xxx_led_devtype mc34708_led_devtype = {
311 .led_min = MC34708_LED_R,
312 .led_max = MC34708_LED_G,
313 .num_regs = 1,
314 .ledctrl_base = 54,
315};
316
317static const struct platform_device_id mc13xxx_led_id_table[] = {
318 { "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
319 { "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
320 { "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
321 { }
322};
323MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);
324
325static struct platform_driver mc13xxx_led_driver = {
326 .driver = {
327 .name = "mc13xxx-led",
328 .owner = THIS_MODULE,
329 },
330 .remove = mc13xxx_led_remove,
331 .id_table = mc13xxx_led_id_table,
332};
333module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);
334
335MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
336MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
337MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * LEDs driver for Freescale MC13783/MC13892/MC34708
4 *
5 * Copyright (C) 2010 Philippe Rétornaz
6 *
7 * Based on leds-da903x:
8 * Copyright (C) 2008 Compulab, Ltd.
9 * Mike Rapoport <mike@compulab.co.il>
10 *
11 * Copyright (C) 2006-2008 Marvell International Ltd.
12 * Eric Miao <eric.miao@marvell.com>
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/of.h>
20#include <linux/mfd/mc13xxx.h>
21
22struct mc13xxx_led_devtype {
23 int led_min;
24 int led_max;
25 int num_regs;
26 u32 ledctrl_base;
27};
28
29struct mc13xxx_led {
30 struct led_classdev cdev;
31 int id;
32 struct mc13xxx_leds *leds;
33};
34
35struct mc13xxx_leds {
36 struct mc13xxx *master;
37 struct mc13xxx_led_devtype *devtype;
38 int num_leds;
39 struct mc13xxx_led *led;
40};
41
42static unsigned int mc13xxx_max_brightness(int id)
43{
44 if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
45 return 0x0f;
46 else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
47 return 0x1f;
48
49 return 0x3f;
50}
51
52static int mc13xxx_led_set(struct led_classdev *led_cdev,
53 enum led_brightness value)
54{
55 struct mc13xxx_led *led =
56 container_of(led_cdev, struct mc13xxx_led, cdev);
57 struct mc13xxx_leds *leds = led->leds;
58 unsigned int reg, bank, off, shift;
59
60 switch (led->id) {
61 case MC13783_LED_MD:
62 case MC13783_LED_AD:
63 case MC13783_LED_KP:
64 reg = 2;
65 shift = 9 + (led->id - MC13783_LED_MD) * 4;
66 break;
67 case MC13783_LED_R1:
68 case MC13783_LED_G1:
69 case MC13783_LED_B1:
70 case MC13783_LED_R2:
71 case MC13783_LED_G2:
72 case MC13783_LED_B2:
73 case MC13783_LED_R3:
74 case MC13783_LED_G3:
75 case MC13783_LED_B3:
76 off = led->id - MC13783_LED_R1;
77 bank = off / 3;
78 reg = 3 + bank;
79 shift = (off - bank * 3) * 5 + 6;
80 break;
81 case MC13892_LED_MD:
82 case MC13892_LED_AD:
83 case MC13892_LED_KP:
84 off = led->id - MC13892_LED_MD;
85 reg = off / 2;
86 shift = 3 + (off - reg * 2) * 12;
87 break;
88 case MC13892_LED_R:
89 case MC13892_LED_G:
90 case MC13892_LED_B:
91 off = led->id - MC13892_LED_R;
92 bank = off / 2;
93 reg = 2 + bank;
94 shift = (off - bank * 2) * 12 + 3;
95 break;
96 case MC34708_LED_R:
97 case MC34708_LED_G:
98 reg = 0;
99 shift = 3 + (led->id - MC34708_LED_R) * 12;
100 break;
101 default:
102 BUG();
103 }
104
105 return mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
106 mc13xxx_max_brightness(led->id) << shift,
107 value << shift);
108}
109
110#ifdef CONFIG_OF
111static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
112 struct platform_device *pdev)
113{
114 struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
115 struct mc13xxx_leds_platform_data *pdata;
116 struct device_node *parent, *child;
117 struct device *dev = &pdev->dev;
118 int i = 0, ret = -ENODATA;
119
120 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
121 if (!pdata)
122 return ERR_PTR(-ENOMEM);
123
124 parent = of_get_child_by_name(dev->parent->of_node, "leds");
125 if (!parent)
126 goto out_node_put;
127
128 ret = of_property_read_u32_array(parent, "led-control",
129 pdata->led_control,
130 leds->devtype->num_regs);
131 if (ret)
132 goto out_node_put;
133
134 pdata->num_leds = of_get_child_count(parent);
135
136 pdata->led = devm_kcalloc(dev, pdata->num_leds, sizeof(*pdata->led),
137 GFP_KERNEL);
138 if (!pdata->led) {
139 ret = -ENOMEM;
140 goto out_node_put;
141 }
142
143 for_each_child_of_node(parent, child) {
144 const char *str;
145 u32 tmp;
146
147 if (of_property_read_u32(child, "reg", &tmp))
148 continue;
149 pdata->led[i].id = leds->devtype->led_min + tmp;
150
151 if (!of_property_read_string(child, "label", &str))
152 pdata->led[i].name = str;
153 if (!of_property_read_string(child, "linux,default-trigger",
154 &str))
155 pdata->led[i].default_trigger = str;
156
157 i++;
158 }
159
160 pdata->num_leds = i;
161 ret = i > 0 ? 0 : -ENODATA;
162
163out_node_put:
164 of_node_put(parent);
165
166 return ret ? ERR_PTR(ret) : pdata;
167}
168#else
169static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
170 struct platform_device *pdev)
171{
172 return ERR_PTR(-ENOSYS);
173}
174#endif
175
176static int __init mc13xxx_led_probe(struct platform_device *pdev)
177{
178 struct device *dev = &pdev->dev;
179 struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
180 struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
181 struct mc13xxx_led_devtype *devtype =
182 (struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
183 struct mc13xxx_leds *leds;
184 int i, id, ret = -ENODATA;
185 u32 init_led = 0;
186
187 leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
188 if (!leds)
189 return -ENOMEM;
190
191 leds->devtype = devtype;
192 leds->master = mcdev;
193 platform_set_drvdata(pdev, leds);
194
195 if (dev->parent->of_node) {
196 pdata = mc13xxx_led_probe_dt(pdev);
197 if (IS_ERR(pdata))
198 return PTR_ERR(pdata);
199 } else if (!pdata)
200 return -ENODATA;
201
202 leds->num_leds = pdata->num_leds;
203
204 if ((leds->num_leds < 1) ||
205 (leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
206 dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
207 return -EINVAL;
208 }
209
210 leds->led = devm_kcalloc(dev, leds->num_leds, sizeof(*leds->led),
211 GFP_KERNEL);
212 if (!leds->led)
213 return -ENOMEM;
214
215 for (i = 0; i < devtype->num_regs; i++) {
216 ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
217 pdata->led_control[i]);
218 if (ret)
219 return ret;
220 }
221
222 for (i = 0; i < leds->num_leds; i++) {
223 const char *name, *trig;
224
225 ret = -EINVAL;
226
227 id = pdata->led[i].id;
228 name = pdata->led[i].name;
229 trig = pdata->led[i].default_trigger;
230
231 if ((id > devtype->led_max) || (id < devtype->led_min)) {
232 dev_err(dev, "Invalid ID %i\n", id);
233 break;
234 }
235
236 if (init_led & (1 << id)) {
237 dev_warn(dev, "LED %i already initialized\n", id);
238 break;
239 }
240
241 init_led |= 1 << id;
242 leds->led[i].id = id;
243 leds->led[i].leds = leds;
244 leds->led[i].cdev.name = name;
245 leds->led[i].cdev.default_trigger = trig;
246 leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
247 leds->led[i].cdev.brightness_set_blocking = mc13xxx_led_set;
248 leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
249
250 ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
251 if (ret) {
252 dev_err(dev, "Failed to register LED %i\n", id);
253 break;
254 }
255 }
256
257 if (ret)
258 while (--i >= 0)
259 led_classdev_unregister(&leds->led[i].cdev);
260
261 return ret;
262}
263
264static int mc13xxx_led_remove(struct platform_device *pdev)
265{
266 struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
267 int i;
268
269 for (i = 0; i < leds->num_leds; i++)
270 led_classdev_unregister(&leds->led[i].cdev);
271
272 return 0;
273}
274
275static const struct mc13xxx_led_devtype mc13783_led_devtype = {
276 .led_min = MC13783_LED_MD,
277 .led_max = MC13783_LED_B3,
278 .num_regs = 6,
279 .ledctrl_base = 51,
280};
281
282static const struct mc13xxx_led_devtype mc13892_led_devtype = {
283 .led_min = MC13892_LED_MD,
284 .led_max = MC13892_LED_B,
285 .num_regs = 4,
286 .ledctrl_base = 51,
287};
288
289static const struct mc13xxx_led_devtype mc34708_led_devtype = {
290 .led_min = MC34708_LED_R,
291 .led_max = MC34708_LED_G,
292 .num_regs = 1,
293 .ledctrl_base = 54,
294};
295
296static const struct platform_device_id mc13xxx_led_id_table[] = {
297 { "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
298 { "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
299 { "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
300 { }
301};
302MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);
303
304static struct platform_driver mc13xxx_led_driver = {
305 .driver = {
306 .name = "mc13xxx-led",
307 },
308 .remove = mc13xxx_led_remove,
309 .id_table = mc13xxx_led_id_table,
310};
311module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);
312
313MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
314MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
315MODULE_LICENSE("GPL");