1/* NXP PCF50633 Power Management Unit (PMU) driver
2 *
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Harald Welte <laforge@openmoko.org>
5 * Balaji Rao <balajirrao@openmoko.org>
6 * All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/device.h>
17#include <linux/sysfs.h>
18#include <linux/module.h>
19#include <linux/types.h>
20#include <linux/interrupt.h>
21#include <linux/workqueue.h>
22#include <linux/platform_device.h>
23#include <linux/i2c.h>
24#include <linux/pm.h>
25#include <linux/slab.h>
26#include <linux/regmap.h>
27#include <linux/err.h>
28
29#include <linux/mfd/pcf50633/core.h>
30
31/* Read a block of up to 32 regs */
32int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
33 int nr_regs, u8 *data)
34{
35 int ret;
36
37 ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
38 if (ret != 0)
39 return ret;
40
41 return nr_regs;
42}
43EXPORT_SYMBOL_GPL(pcf50633_read_block);
44
45/* Write a block of up to 32 regs */
46int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
47 int nr_regs, u8 *data)
48{
49 return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
50}
51EXPORT_SYMBOL_GPL(pcf50633_write_block);
52
53u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
54{
55 unsigned int val;
56 int ret;
57
58 ret = regmap_read(pcf->regmap, reg, &val);
59 if (ret < 0)
60 return -1;
61
62 return val;
63}
64EXPORT_SYMBOL_GPL(pcf50633_reg_read);
65
66int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
67{
68 return regmap_write(pcf->regmap, reg, val);
69}
70EXPORT_SYMBOL_GPL(pcf50633_reg_write);
71
72int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
73{
74 return regmap_update_bits(pcf->regmap, reg, mask, val);
75}
76EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
77
78int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
79{
80 return regmap_update_bits(pcf->regmap, reg, val, 0);
81}
82EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
83
84/* sysfs attributes */
85static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
86 char *buf)
87{
88 struct pcf50633 *pcf = dev_get_drvdata(dev);
89 u8 dump[16];
90 int n, n1, idx = 0;
91 char *buf1 = buf;
92 static u8 address_no_read[] = { /* must be ascending */
93 PCF50633_REG_INT1,
94 PCF50633_REG_INT2,
95 PCF50633_REG_INT3,
96 PCF50633_REG_INT4,
97 PCF50633_REG_INT5,
98 0 /* terminator */
99 };
100
101 for (n = 0; n < 256; n += sizeof(dump)) {
102 for (n1 = 0; n1 < sizeof(dump); n1++)
103 if (n == address_no_read[idx]) {
104 idx++;
105 dump[n1] = 0x00;
106 } else
107 dump[n1] = pcf50633_reg_read(pcf, n + n1);
108
109 buf1 += sprintf(buf1, "%*ph\n", (int)sizeof(dump), dump);
110 }
111
112 return buf1 - buf;
113}
114static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
115
116static ssize_t show_resume_reason(struct device *dev,
117 struct device_attribute *attr, char *buf)
118{
119 struct pcf50633 *pcf = dev_get_drvdata(dev);
120 int n;
121
122 n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
123 pcf->resume_reason[0],
124 pcf->resume_reason[1],
125 pcf->resume_reason[2],
126 pcf->resume_reason[3],
127 pcf->resume_reason[4]);
128
129 return n;
130}
131static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
132
133static struct attribute *pcf_sysfs_entries[] = {
134 &dev_attr_dump_regs.attr,
135 &dev_attr_resume_reason.attr,
136 NULL,
137};
138
139static struct attribute_group pcf_attr_group = {
140 .name = NULL, /* put in device directory */
141 .attrs = pcf_sysfs_entries,
142};
143
144static void
145pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
146 struct platform_device **pdev)
147{
148 int ret;
149
150 *pdev = platform_device_alloc(name, -1);
151 if (!*pdev) {
152 dev_err(pcf->dev, "Failed to allocate %s\n", name);
153 return;
154 }
155
156 (*pdev)->dev.parent = pcf->dev;
157
158 ret = platform_device_add(*pdev);
159 if (ret) {
160 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
161 platform_device_put(*pdev);
162 *pdev = NULL;
163 }
164}
165
166#ifdef CONFIG_PM_SLEEP
167static int pcf50633_suspend(struct device *dev)
168{
169 struct i2c_client *client = to_i2c_client(dev);
170 struct pcf50633 *pcf = i2c_get_clientdata(client);
171
172 return pcf50633_irq_suspend(pcf);
173}
174
175static int pcf50633_resume(struct device *dev)
176{
177 struct i2c_client *client = to_i2c_client(dev);
178 struct pcf50633 *pcf = i2c_get_clientdata(client);
179
180 return pcf50633_irq_resume(pcf);
181}
182#endif
183
184static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
185
186static const struct regmap_config pcf50633_regmap_config = {
187 .reg_bits = 8,
188 .val_bits = 8,
189};
190
191static int pcf50633_probe(struct i2c_client *client,
192 const struct i2c_device_id *ids)
193{
194 struct pcf50633 *pcf;
195 struct platform_device *pdev;
196 struct pcf50633_platform_data *pdata = dev_get_platdata(&client->dev);
197 int i, j, ret;
198 int version, variant;
199
200 if (!client->irq) {
201 dev_err(&client->dev, "Missing IRQ\n");
202 return -ENOENT;
203 }
204
205 pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
206 if (!pcf)
207 return -ENOMEM;
208
209 i2c_set_clientdata(client, pcf);
210 pcf->dev = &client->dev;
211 pcf->pdata = pdata;
212
213 mutex_init(&pcf->lock);
214
215 pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
216 if (IS_ERR(pcf->regmap)) {
217 ret = PTR_ERR(pcf->regmap);
218 dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
219 return ret;
220 }
221
222 version = pcf50633_reg_read(pcf, 0);
223 variant = pcf50633_reg_read(pcf, 1);
224 if (version < 0 || variant < 0) {
225 dev_err(pcf->dev, "Unable to probe pcf50633\n");
226 ret = -ENODEV;
227 return ret;
228 }
229
230 dev_info(pcf->dev, "Probed device version %d variant %d\n",
231 version, variant);
232
233 pcf50633_irq_init(pcf, client->irq);
234
235 /* Create sub devices */
236 pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
237 pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
238 pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
239 pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
240 pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);
241
242
243 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
244 pdev = platform_device_alloc("pcf50633-regulator", i);
245 if (!pdev) {
246 ret = -ENOMEM;
247 goto err2;
248 }
249
250 pdev->dev.parent = pcf->dev;
251 ret = platform_device_add_data(pdev, &pdata->reg_init_data[i],
252 sizeof(pdata->reg_init_data[i]));
253 if (ret)
254 goto err;
255
256 ret = platform_device_add(pdev);
257 if (ret)
258 goto err;
259
260 pcf->regulator_pdev[i] = pdev;
261 }
262
263 ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
264 if (ret)
265 dev_warn(pcf->dev, "error creating sysfs entries\n");
266
267 if (pdata->probe_done)
268 pdata->probe_done(pcf);
269
270 return 0;
271
272err:
273 platform_device_put(pdev);
274err2:
275 for (j = 0; j < i; j++)
276 platform_device_put(pcf->regulator_pdev[j]);
277
278 return ret;
279}
280
281static int pcf50633_remove(struct i2c_client *client)
282{
283 struct pcf50633 *pcf = i2c_get_clientdata(client);
284 int i;
285
286 sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
287 pcf50633_irq_free(pcf);
288
289 platform_device_unregister(pcf->input_pdev);
290 platform_device_unregister(pcf->rtc_pdev);
291 platform_device_unregister(pcf->mbc_pdev);
292 platform_device_unregister(pcf->adc_pdev);
293 platform_device_unregister(pcf->bl_pdev);
294
295 for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
296 platform_device_unregister(pcf->regulator_pdev[i]);
297
298 return 0;
299}
300
301static const struct i2c_device_id pcf50633_id_table[] = {
302 {"pcf50633", 0x73},
303 {/* end of list */}
304};
305MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
306
307static struct i2c_driver pcf50633_driver = {
308 .driver = {
309 .name = "pcf50633",
310 .pm = &pcf50633_pm,
311 },
312 .id_table = pcf50633_id_table,
313 .probe = pcf50633_probe,
314 .remove = pcf50633_remove,
315};
316
317static int __init pcf50633_init(void)
318{
319 return i2c_add_driver(&pcf50633_driver);
320}
321
322static void __exit pcf50633_exit(void)
323{
324 i2c_del_driver(&pcf50633_driver);
325}
326
327MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
328MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
329MODULE_LICENSE("GPL");
330
331subsys_initcall(pcf50633_init);
332module_exit(pcf50633_exit);
333