Commit | Line | Data |
---|---|---|
a5736e0b MH |
1 | /* |
2 | * Base driver for Analog Devices ADP5520/ADP5501 MFD PMICs | |
3 | * LCD Backlight: drivers/video/backlight/adp5520_bl | |
4 | * LEDs : drivers/led/leds-adp5520 | |
5 | * GPIO : drivers/gpio/adp5520-gpio (ADP5520 only) | |
6 | * Keys : drivers/input/keyboard/adp5520-keys (ADP5520 only) | |
7 | * | |
8 | * Copyright 2009 Analog Devices Inc. | |
9 | * | |
10 | * Derived from da903x: | |
11 | * Copyright (C) 2008 Compulab, Ltd. | |
12 | * Mike Rapoport <mike@compulab.co.il> | |
13 | * | |
14 | * Copyright (C) 2006-2008 Marvell International Ltd. | |
15 | * Eric Miao <eric.miao@marvell.com> | |
16 | * | |
17 | * Licensed under the GPL-2 or later. | |
18 | */ | |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/init.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
a5736e0b MH |
25 | #include <linux/interrupt.h> |
26 | #include <linux/irq.h> | |
27 | #include <linux/err.h> | |
28 | #include <linux/i2c.h> | |
29 | ||
30 | #include <linux/mfd/adp5520.h> | |
31 | ||
32 | struct adp5520_chip { | |
33 | struct i2c_client *client; | |
34 | struct device *dev; | |
35 | struct mutex lock; | |
36 | struct blocking_notifier_head notifier_list; | |
37 | int irq; | |
38 | unsigned long id; | |
c6cc25fd | 39 | uint8_t mode; |
a5736e0b MH |
40 | }; |
41 | ||
42 | static int __adp5520_read(struct i2c_client *client, | |
43 | int reg, uint8_t *val) | |
44 | { | |
45 | int ret; | |
46 | ||
47 | ret = i2c_smbus_read_byte_data(client, reg); | |
48 | if (ret < 0) { | |
49 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
50 | return ret; | |
51 | } | |
52 | ||
53 | *val = (uint8_t)ret; | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static int __adp5520_write(struct i2c_client *client, | |
58 | int reg, uint8_t val) | |
59 | { | |
60 | int ret; | |
61 | ||
62 | ret = i2c_smbus_write_byte_data(client, reg, val); | |
63 | if (ret < 0) { | |
64 | dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n", | |
65 | val, reg); | |
66 | return ret; | |
67 | } | |
68 | return 0; | |
69 | } | |
70 | ||
4e8b7026 MB |
71 | static int __adp5520_ack_bits(struct i2c_client *client, int reg, |
72 | uint8_t bit_mask) | |
a5736e0b MH |
73 | { |
74 | struct adp5520_chip *chip = i2c_get_clientdata(client); | |
75 | uint8_t reg_val; | |
76 | int ret; | |
77 | ||
78 | mutex_lock(&chip->lock); | |
79 | ||
80 | ret = __adp5520_read(client, reg, ®_val); | |
81 | ||
82 | if (!ret) { | |
83 | reg_val |= bit_mask; | |
84 | ret = __adp5520_write(client, reg, reg_val); | |
85 | } | |
86 | ||
87 | mutex_unlock(&chip->lock); | |
88 | return ret; | |
89 | } | |
90 | ||
91 | int adp5520_write(struct device *dev, int reg, uint8_t val) | |
92 | { | |
93 | return __adp5520_write(to_i2c_client(dev), reg, val); | |
94 | } | |
95 | EXPORT_SYMBOL_GPL(adp5520_write); | |
96 | ||
97 | int adp5520_read(struct device *dev, int reg, uint8_t *val) | |
98 | { | |
99 | return __adp5520_read(to_i2c_client(dev), reg, val); | |
100 | } | |
101 | EXPORT_SYMBOL_GPL(adp5520_read); | |
102 | ||
103 | int adp5520_set_bits(struct device *dev, int reg, uint8_t bit_mask) | |
104 | { | |
105 | struct adp5520_chip *chip = dev_get_drvdata(dev); | |
106 | uint8_t reg_val; | |
107 | int ret; | |
108 | ||
109 | mutex_lock(&chip->lock); | |
110 | ||
111 | ret = __adp5520_read(chip->client, reg, ®_val); | |
112 | ||
890c98e3 | 113 | if (!ret && ((reg_val & bit_mask) != bit_mask)) { |
a5736e0b MH |
114 | reg_val |= bit_mask; |
115 | ret = __adp5520_write(chip->client, reg, reg_val); | |
116 | } | |
117 | ||
118 | mutex_unlock(&chip->lock); | |
119 | return ret; | |
120 | } | |
121 | EXPORT_SYMBOL_GPL(adp5520_set_bits); | |
122 | ||
123 | int adp5520_clr_bits(struct device *dev, int reg, uint8_t bit_mask) | |
124 | { | |
125 | struct adp5520_chip *chip = dev_get_drvdata(dev); | |
126 | uint8_t reg_val; | |
127 | int ret; | |
128 | ||
129 | mutex_lock(&chip->lock); | |
130 | ||
131 | ret = __adp5520_read(chip->client, reg, ®_val); | |
132 | ||
133 | if (!ret && (reg_val & bit_mask)) { | |
134 | reg_val &= ~bit_mask; | |
135 | ret = __adp5520_write(chip->client, reg, reg_val); | |
136 | } | |
137 | ||
138 | mutex_unlock(&chip->lock); | |
139 | return ret; | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(adp5520_clr_bits); | |
142 | ||
143 | int adp5520_register_notifier(struct device *dev, struct notifier_block *nb, | |
144 | unsigned int events) | |
145 | { | |
146 | struct adp5520_chip *chip = dev_get_drvdata(dev); | |
147 | ||
148 | if (chip->irq) { | |
149 | adp5520_set_bits(chip->dev, ADP5520_INTERRUPT_ENABLE, | |
150 | events & (ADP5520_KP_IEN | ADP5520_KR_IEN | | |
151 | ADP5520_OVP_IEN | ADP5520_CMPR_IEN)); | |
152 | ||
153 | return blocking_notifier_chain_register(&chip->notifier_list, | |
154 | nb); | |
155 | } | |
156 | ||
157 | return -ENODEV; | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(adp5520_register_notifier); | |
160 | ||
161 | int adp5520_unregister_notifier(struct device *dev, struct notifier_block *nb, | |
162 | unsigned int events) | |
163 | { | |
164 | struct adp5520_chip *chip = dev_get_drvdata(dev); | |
165 | ||
166 | adp5520_clr_bits(chip->dev, ADP5520_INTERRUPT_ENABLE, | |
167 | events & (ADP5520_KP_IEN | ADP5520_KR_IEN | | |
168 | ADP5520_OVP_IEN | ADP5520_CMPR_IEN)); | |
169 | ||
170 | return blocking_notifier_chain_unregister(&chip->notifier_list, nb); | |
171 | } | |
172 | EXPORT_SYMBOL_GPL(adp5520_unregister_notifier); | |
173 | ||
174 | static irqreturn_t adp5520_irq_thread(int irq, void *data) | |
175 | { | |
176 | struct adp5520_chip *chip = data; | |
177 | unsigned int events; | |
178 | uint8_t reg_val; | |
179 | int ret; | |
180 | ||
181 | ret = __adp5520_read(chip->client, ADP5520_MODE_STATUS, ®_val); | |
182 | if (ret) | |
183 | goto out; | |
184 | ||
185 | events = reg_val & (ADP5520_OVP_INT | ADP5520_CMPR_INT | | |
186 | ADP5520_GPI_INT | ADP5520_KR_INT | ADP5520_KP_INT); | |
187 | ||
188 | blocking_notifier_call_chain(&chip->notifier_list, events, NULL); | |
189 | /* ACK, Sticky bits are W1C */ | |
190 | __adp5520_ack_bits(chip->client, ADP5520_MODE_STATUS, events); | |
191 | ||
192 | out: | |
193 | return IRQ_HANDLED; | |
194 | } | |
195 | ||
196 | static int __remove_subdev(struct device *dev, void *unused) | |
197 | { | |
198 | platform_device_unregister(to_platform_device(dev)); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static int adp5520_remove_subdevs(struct adp5520_chip *chip) | |
203 | { | |
204 | return device_for_each_child(chip->dev, NULL, __remove_subdev); | |
205 | } | |
206 | ||
f791be49 | 207 | static int adp5520_probe(struct i2c_client *client, |
a5736e0b MH |
208 | const struct i2c_device_id *id) |
209 | { | |
210 | struct adp5520_platform_data *pdata = client->dev.platform_data; | |
211 | struct platform_device *pdev; | |
212 | struct adp5520_chip *chip; | |
213 | int ret; | |
214 | ||
215 | if (!i2c_check_functionality(client->adapter, | |
216 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
217 | dev_err(&client->dev, "SMBUS Word Data not Supported\n"); | |
218 | return -EIO; | |
219 | } | |
220 | ||
221 | if (pdata == NULL) { | |
222 | dev_err(&client->dev, "missing platform data\n"); | |
223 | return -ENODEV; | |
224 | } | |
225 | ||
76ba0b89 | 226 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
a5736e0b MH |
227 | if (!chip) |
228 | return -ENOMEM; | |
229 | ||
230 | i2c_set_clientdata(client, chip); | |
231 | chip->client = client; | |
232 | ||
233 | chip->dev = &client->dev; | |
234 | chip->irq = client->irq; | |
235 | chip->id = id->driver_data; | |
236 | mutex_init(&chip->lock); | |
237 | ||
238 | if (chip->irq) { | |
239 | BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list); | |
240 | ||
241 | ret = request_threaded_irq(chip->irq, NULL, adp5520_irq_thread, | |
242 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
243 | "adp5520", chip); | |
244 | if (ret) { | |
245 | dev_err(&client->dev, "failed to request irq %d\n", | |
246 | chip->irq); | |
76ba0b89 | 247 | return ret; |
a5736e0b MH |
248 | } |
249 | } | |
250 | ||
251 | ret = adp5520_write(chip->dev, ADP5520_MODE_STATUS, ADP5520_nSTNBY); | |
252 | if (ret) { | |
253 | dev_err(&client->dev, "failed to write\n"); | |
254 | goto out_free_irq; | |
255 | } | |
256 | ||
257 | if (pdata->keys) { | |
258 | pdev = platform_device_register_data(chip->dev, "adp5520-keys", | |
259 | chip->id, pdata->keys, sizeof(*pdata->keys)); | |
260 | if (IS_ERR(pdev)) { | |
261 | ret = PTR_ERR(pdev); | |
262 | goto out_remove_subdevs; | |
263 | } | |
264 | } | |
265 | ||
266 | if (pdata->gpio) { | |
267 | pdev = platform_device_register_data(chip->dev, "adp5520-gpio", | |
268 | chip->id, pdata->gpio, sizeof(*pdata->gpio)); | |
269 | if (IS_ERR(pdev)) { | |
270 | ret = PTR_ERR(pdev); | |
271 | goto out_remove_subdevs; | |
272 | } | |
273 | } | |
274 | ||
275 | if (pdata->leds) { | |
276 | pdev = platform_device_register_data(chip->dev, "adp5520-led", | |
277 | chip->id, pdata->leds, sizeof(*pdata->leds)); | |
278 | if (IS_ERR(pdev)) { | |
279 | ret = PTR_ERR(pdev); | |
280 | goto out_remove_subdevs; | |
281 | } | |
282 | } | |
283 | ||
284 | if (pdata->backlight) { | |
285 | pdev = platform_device_register_data(chip->dev, | |
286 | "adp5520-backlight", | |
287 | chip->id, | |
288 | pdata->backlight, | |
289 | sizeof(*pdata->backlight)); | |
290 | if (IS_ERR(pdev)) { | |
291 | ret = PTR_ERR(pdev); | |
292 | goto out_remove_subdevs; | |
293 | } | |
294 | } | |
295 | ||
296 | return 0; | |
297 | ||
298 | out_remove_subdevs: | |
299 | adp5520_remove_subdevs(chip); | |
300 | ||
301 | out_free_irq: | |
302 | if (chip->irq) | |
303 | free_irq(chip->irq, chip); | |
304 | ||
a5736e0b MH |
305 | return ret; |
306 | } | |
307 | ||
4740f73f | 308 | static int adp5520_remove(struct i2c_client *client) |
a5736e0b MH |
309 | { |
310 | struct adp5520_chip *chip = dev_get_drvdata(&client->dev); | |
311 | ||
312 | if (chip->irq) | |
313 | free_irq(chip->irq, chip); | |
314 | ||
315 | adp5520_remove_subdevs(chip); | |
316 | adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0); | |
a5736e0b MH |
317 | return 0; |
318 | } | |
319 | ||
938848e7 | 320 | #ifdef CONFIG_PM_SLEEP |
dc781454 | 321 | static int adp5520_suspend(struct device *dev) |
a5736e0b | 322 | { |
dc781454 | 323 | struct i2c_client *client = to_i2c_client(dev); |
a5736e0b MH |
324 | struct adp5520_chip *chip = dev_get_drvdata(&client->dev); |
325 | ||
c6cc25fd LPC |
326 | adp5520_read(chip->dev, ADP5520_MODE_STATUS, &chip->mode); |
327 | /* All other bits are W1C */ | |
328 | chip->mode &= ADP5520_BL_EN | ADP5520_DIM_EN | ADP5520_nSTNBY; | |
329 | adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0); | |
a5736e0b MH |
330 | return 0; |
331 | } | |
332 | ||
dc781454 | 333 | static int adp5520_resume(struct device *dev) |
a5736e0b | 334 | { |
dc781454 | 335 | struct i2c_client *client = to_i2c_client(dev); |
a5736e0b MH |
336 | struct adp5520_chip *chip = dev_get_drvdata(&client->dev); |
337 | ||
c6cc25fd | 338 | adp5520_write(chip->dev, ADP5520_MODE_STATUS, chip->mode); |
a5736e0b MH |
339 | return 0; |
340 | } | |
a5736e0b MH |
341 | #endif |
342 | ||
dc781454 MB |
343 | static SIMPLE_DEV_PM_OPS(adp5520_pm, adp5520_suspend, adp5520_resume); |
344 | ||
a5736e0b MH |
345 | static const struct i2c_device_id adp5520_id[] = { |
346 | { "pmic-adp5520", ID_ADP5520 }, | |
347 | { "pmic-adp5501", ID_ADP5501 }, | |
348 | { } | |
349 | }; | |
350 | MODULE_DEVICE_TABLE(i2c, adp5520_id); | |
351 | ||
352 | static struct i2c_driver adp5520_driver = { | |
353 | .driver = { | |
354 | .name = "adp5520", | |
355 | .owner = THIS_MODULE, | |
dc781454 | 356 | .pm = &adp5520_pm, |
a5736e0b MH |
357 | }, |
358 | .probe = adp5520_probe, | |
84449216 | 359 | .remove = adp5520_remove, |
a5736e0b MH |
360 | .id_table = adp5520_id, |
361 | }; | |
362 | ||
099bb952 | 363 | module_i2c_driver(adp5520_driver); |
a5736e0b MH |
364 | |
365 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
366 | MODULE_DESCRIPTION("ADP5520(01) PMIC-MFD Driver"); | |
367 | MODULE_LICENSE("GPL"); |