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>
24 #include <linux/slab.h>
26 #include <linux/mfd/pcf50633/core.h>
28 int pcf50633_irq_init(struct pcf50633 *pcf, int irq);
29 void pcf50633_irq_free(struct pcf50633 *pcf);
31 int pcf50633_irq_suspend(struct pcf50633 *pcf);
32 int pcf50633_irq_resume(struct pcf50633 *pcf);
35 static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
39 ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
42 dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
47 static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
51 ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
54 dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
60 /* Read a block of upto 32 regs */
61 int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
62 int nr_regs, u8 *data)
66 mutex_lock(&pcf->lock);
67 ret = __pcf50633_read(pcf, reg, nr_regs, data);
68 mutex_unlock(&pcf->lock);
72 EXPORT_SYMBOL_GPL(pcf50633_read_block);
74 /* Write a block of upto 32 regs */
75 int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
76 int nr_regs, u8 *data)
80 mutex_lock(&pcf->lock);
81 ret = __pcf50633_write(pcf, reg, nr_regs, data);
82 mutex_unlock(&pcf->lock);
86 EXPORT_SYMBOL_GPL(pcf50633_write_block);
88 u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
92 mutex_lock(&pcf->lock);
93 __pcf50633_read(pcf, reg, 1, &val);
94 mutex_unlock(&pcf->lock);
98 EXPORT_SYMBOL_GPL(pcf50633_reg_read);
100 int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
104 mutex_lock(&pcf->lock);
105 ret = __pcf50633_write(pcf, reg, 1, &val);
106 mutex_unlock(&pcf->lock);
110 EXPORT_SYMBOL_GPL(pcf50633_reg_write);
112 int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
119 mutex_lock(&pcf->lock);
120 ret = __pcf50633_read(pcf, reg, 1, &tmp);
126 ret = __pcf50633_write(pcf, reg, 1, &tmp);
129 mutex_unlock(&pcf->lock);
133 EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
135 int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
140 mutex_lock(&pcf->lock);
141 ret = __pcf50633_read(pcf, reg, 1, &tmp);
146 ret = __pcf50633_write(pcf, reg, 1, &tmp);
149 mutex_unlock(&pcf->lock);
153 EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
155 /* sysfs attributes */
156 static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
159 struct pcf50633 *pcf = dev_get_drvdata(dev);
163 static u8 address_no_read[] = { /* must be ascending */
172 for (n = 0; n < 256; n += sizeof(dump)) {
173 for (n1 = 0; n1 < sizeof(dump); n1++)
174 if (n == address_no_read[idx]) {
178 dump[n1] = pcf50633_reg_read(pcf, n + n1);
180 hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
181 buf1 += strlen(buf1);
188 static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
190 static ssize_t show_resume_reason(struct device *dev,
191 struct device_attribute *attr, char *buf)
193 struct pcf50633 *pcf = dev_get_drvdata(dev);
196 n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
197 pcf->resume_reason[0],
198 pcf->resume_reason[1],
199 pcf->resume_reason[2],
200 pcf->resume_reason[3],
201 pcf->resume_reason[4]);
205 static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
207 static struct attribute *pcf_sysfs_entries[] = {
208 &dev_attr_dump_regs.attr,
209 &dev_attr_resume_reason.attr,
213 static struct attribute_group pcf_attr_group = {
214 .name = NULL, /* put in device directory */
215 .attrs = pcf_sysfs_entries,
219 pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
220 struct platform_device **pdev)
224 *pdev = platform_device_alloc(name, -1);
226 dev_err(pcf->dev, "Falied to allocate %s\n", name);
230 (*pdev)->dev.parent = pcf->dev;
232 ret = platform_device_add(*pdev);
234 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
235 platform_device_put(*pdev);
241 static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
243 struct pcf50633 *pcf;
244 pcf = i2c_get_clientdata(client);
246 return pcf50633_irq_suspend(pcf);
249 static int pcf50633_resume(struct i2c_client *client)
251 struct pcf50633 *pcf;
252 pcf = i2c_get_clientdata(client);
254 return pcf50633_irq_resume(pcf);
257 #define pcf50633_suspend NULL
258 #define pcf50633_resume NULL
261 static int __devinit pcf50633_probe(struct i2c_client *client,
262 const struct i2c_device_id *ids)
264 struct pcf50633 *pcf;
265 struct pcf50633_platform_data *pdata = client->dev.platform_data;
267 int version, variant;
270 dev_err(&client->dev, "Missing IRQ\n");
274 pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
280 mutex_init(&pcf->lock);
282 i2c_set_clientdata(client, pcf);
283 pcf->dev = &client->dev;
284 pcf->i2c_client = client;
286 version = pcf50633_reg_read(pcf, 0);
287 variant = pcf50633_reg_read(pcf, 1);
288 if (version < 0 || variant < 0) {
289 dev_err(pcf->dev, "Unable to probe pcf50633\n");
294 dev_info(pcf->dev, "Probed device version %d variant %d\n",
297 pcf50633_irq_init(pcf, client->irq);
299 /* Create sub devices */
300 pcf50633_client_dev_register(pcf, "pcf50633-input",
302 pcf50633_client_dev_register(pcf, "pcf50633-rtc",
304 pcf50633_client_dev_register(pcf, "pcf50633-mbc",
306 pcf50633_client_dev_register(pcf, "pcf50633-adc",
308 pcf50633_client_dev_register(pcf, "pcf50633-backlight",
312 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
313 struct platform_device *pdev;
315 pdev = platform_device_alloc("pcf50633-regltr", i);
317 dev_err(pcf->dev, "Cannot create regulator %d\n", i);
321 pdev->dev.parent = pcf->dev;
322 platform_device_add_data(pdev, &pdata->reg_init_data[i],
323 sizeof(pdata->reg_init_data[i]));
324 pcf->regulator_pdev[i] = pdev;
326 platform_device_add(pdev);
329 ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
331 dev_err(pcf->dev, "error creating sysfs entries\n");
333 if (pdata->probe_done)
334 pdata->probe_done(pcf);
344 static int __devexit pcf50633_remove(struct i2c_client *client)
346 struct pcf50633 *pcf = i2c_get_clientdata(client);
349 pcf50633_irq_free(pcf);
351 platform_device_unregister(pcf->input_pdev);
352 platform_device_unregister(pcf->rtc_pdev);
353 platform_device_unregister(pcf->mbc_pdev);
354 platform_device_unregister(pcf->adc_pdev);
356 for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
357 platform_device_unregister(pcf->regulator_pdev[i]);
364 static struct i2c_device_id pcf50633_id_table[] = {
369 static struct i2c_driver pcf50633_driver = {
373 .id_table = pcf50633_id_table,
374 .probe = pcf50633_probe,
375 .remove = __devexit_p(pcf50633_remove),
376 .suspend = pcf50633_suspend,
377 .resume = pcf50633_resume,
380 static int __init pcf50633_init(void)
382 return i2c_add_driver(&pcf50633_driver);
385 static void __exit pcf50633_exit(void)
387 i2c_del_driver(&pcf50633_driver);
390 MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
391 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
392 MODULE_LICENSE("GPL");
394 subsys_initcall(pcf50633_init);
395 module_exit(pcf50633_exit);