1 /* NXP PCF50633 Power Management Unit (PMU) driver
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Harald Welte <laforge@openmoko.org>
5 * Balaji Rao <balajirrao@openmoko.org>
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.
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>
25 #include <linux/slab.h>
27 #include <linux/mfd/pcf50633/core.h>
29 static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
33 ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
36 dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
41 static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
45 ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
48 dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
54 /* Read a block of up to 32 regs */
55 int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
56 int nr_regs, u8 *data)
60 mutex_lock(&pcf->lock);
61 ret = __pcf50633_read(pcf, reg, nr_regs, data);
62 mutex_unlock(&pcf->lock);
66 EXPORT_SYMBOL_GPL(pcf50633_read_block);
68 /* Write a block of up to 32 regs */
69 int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
70 int nr_regs, u8 *data)
74 mutex_lock(&pcf->lock);
75 ret = __pcf50633_write(pcf, reg, nr_regs, data);
76 mutex_unlock(&pcf->lock);
80 EXPORT_SYMBOL_GPL(pcf50633_write_block);
82 u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
86 mutex_lock(&pcf->lock);
87 __pcf50633_read(pcf, reg, 1, &val);
88 mutex_unlock(&pcf->lock);
92 EXPORT_SYMBOL_GPL(pcf50633_reg_read);
94 int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
98 mutex_lock(&pcf->lock);
99 ret = __pcf50633_write(pcf, reg, 1, &val);
100 mutex_unlock(&pcf->lock);
104 EXPORT_SYMBOL_GPL(pcf50633_reg_write);
106 int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
113 mutex_lock(&pcf->lock);
114 ret = __pcf50633_read(pcf, reg, 1, &tmp);
120 ret = __pcf50633_write(pcf, reg, 1, &tmp);
123 mutex_unlock(&pcf->lock);
127 EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
129 int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
134 mutex_lock(&pcf->lock);
135 ret = __pcf50633_read(pcf, reg, 1, &tmp);
140 ret = __pcf50633_write(pcf, reg, 1, &tmp);
143 mutex_unlock(&pcf->lock);
147 EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
149 /* sysfs attributes */
150 static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
153 struct pcf50633 *pcf = dev_get_drvdata(dev);
157 static u8 address_no_read[] = { /* must be ascending */
166 for (n = 0; n < 256; n += sizeof(dump)) {
167 for (n1 = 0; n1 < sizeof(dump); n1++)
168 if (n == address_no_read[idx]) {
172 dump[n1] = pcf50633_reg_read(pcf, n + n1);
174 hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
175 buf1 += strlen(buf1);
182 static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
184 static ssize_t show_resume_reason(struct device *dev,
185 struct device_attribute *attr, char *buf)
187 struct pcf50633 *pcf = dev_get_drvdata(dev);
190 n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
191 pcf->resume_reason[0],
192 pcf->resume_reason[1],
193 pcf->resume_reason[2],
194 pcf->resume_reason[3],
195 pcf->resume_reason[4]);
199 static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
201 static struct attribute *pcf_sysfs_entries[] = {
202 &dev_attr_dump_regs.attr,
203 &dev_attr_resume_reason.attr,
207 static struct attribute_group pcf_attr_group = {
208 .name = NULL, /* put in device directory */
209 .attrs = pcf_sysfs_entries,
213 pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
214 struct platform_device **pdev)
218 *pdev = platform_device_alloc(name, -1);
220 dev_err(pcf->dev, "Falied to allocate %s\n", name);
224 (*pdev)->dev.parent = pcf->dev;
226 ret = platform_device_add(*pdev);
228 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
229 platform_device_put(*pdev);
234 #ifdef CONFIG_PM_SLEEP
235 static int pcf50633_suspend(struct device *dev)
237 struct i2c_client *client = to_i2c_client(dev);
238 struct pcf50633 *pcf = i2c_get_clientdata(client);
240 return pcf50633_irq_suspend(pcf);
243 static int pcf50633_resume(struct device *dev)
245 struct i2c_client *client = to_i2c_client(dev);
246 struct pcf50633 *pcf = i2c_get_clientdata(client);
248 return pcf50633_irq_resume(pcf);
252 static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
254 static int __devinit pcf50633_probe(struct i2c_client *client,
255 const struct i2c_device_id *ids)
257 struct pcf50633 *pcf;
258 struct pcf50633_platform_data *pdata = client->dev.platform_data;
260 int version, variant;
263 dev_err(&client->dev, "Missing IRQ\n");
267 pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
273 mutex_init(&pcf->lock);
275 i2c_set_clientdata(client, pcf);
276 pcf->dev = &client->dev;
277 pcf->i2c_client = client;
279 version = pcf50633_reg_read(pcf, 0);
280 variant = pcf50633_reg_read(pcf, 1);
281 if (version < 0 || variant < 0) {
282 dev_err(pcf->dev, "Unable to probe pcf50633\n");
287 dev_info(pcf->dev, "Probed device version %d variant %d\n",
290 pcf50633_irq_init(pcf, client->irq);
292 /* Create sub devices */
293 pcf50633_client_dev_register(pcf, "pcf50633-input",
295 pcf50633_client_dev_register(pcf, "pcf50633-rtc",
297 pcf50633_client_dev_register(pcf, "pcf50633-mbc",
299 pcf50633_client_dev_register(pcf, "pcf50633-adc",
301 pcf50633_client_dev_register(pcf, "pcf50633-backlight",
305 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
306 struct platform_device *pdev;
308 pdev = platform_device_alloc("pcf50633-regltr", i);
310 dev_err(pcf->dev, "Cannot create regulator %d\n", i);
314 pdev->dev.parent = pcf->dev;
315 platform_device_add_data(pdev, &pdata->reg_init_data[i],
316 sizeof(pdata->reg_init_data[i]));
317 pcf->regulator_pdev[i] = pdev;
319 platform_device_add(pdev);
322 ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
324 dev_err(pcf->dev, "error creating sysfs entries\n");
326 if (pdata->probe_done)
327 pdata->probe_done(pcf);
337 static int __devexit pcf50633_remove(struct i2c_client *client)
339 struct pcf50633 *pcf = i2c_get_clientdata(client);
342 sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
343 pcf50633_irq_free(pcf);
345 platform_device_unregister(pcf->input_pdev);
346 platform_device_unregister(pcf->rtc_pdev);
347 platform_device_unregister(pcf->mbc_pdev);
348 platform_device_unregister(pcf->adc_pdev);
349 platform_device_unregister(pcf->bl_pdev);
351 for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
352 platform_device_unregister(pcf->regulator_pdev[i]);
359 static const struct i2c_device_id pcf50633_id_table[] = {
363 MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
365 static struct i2c_driver pcf50633_driver = {
370 .id_table = pcf50633_id_table,
371 .probe = pcf50633_probe,
372 .remove = __devexit_p(pcf50633_remove),
375 static int __init pcf50633_init(void)
377 return i2c_add_driver(&pcf50633_driver);
380 static void __exit pcf50633_exit(void)
382 i2c_del_driver(&pcf50633_driver);
385 MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
386 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
387 MODULE_LICENSE("GPL");
389 subsys_initcall(pcf50633_init);
390 module_exit(pcf50633_exit);