[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mfd / pcf50633-core.c

/* NXP PCF50633 Power Management Unit (PMU) driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Harald Welte <laforge@openmoko.org>
 * 	   Balaji Rao <balajirrao@openmoko.org>
 * All rights reserved.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/err.h>

#include <linux/mfd/pcf50633/core.h>

/* Read a block of up to 32 regs  */
int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
					int nr_regs, u8 *data)
{
	int ret;

	ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
	if (ret != 0)
		return ret;

	return nr_regs;
}
EXPORT_SYMBOL_GPL(pcf50633_read_block);

/* Write a block of up to 32 regs  */
int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
					int nr_regs, u8 *data)
{
	return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
}
EXPORT_SYMBOL_GPL(pcf50633_write_block);

u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
{
	unsigned int val;
	int ret;

	ret = regmap_read(pcf->regmap, reg, &val);
	if (ret < 0)
		return -1;

	return val;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_read);

int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
{
	return regmap_write(pcf->regmap, reg, val);
}
EXPORT_SYMBOL_GPL(pcf50633_reg_write);

int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
{
	return regmap_update_bits(pcf->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);

int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
{
	return regmap_update_bits(pcf->regmap, reg, val, 0);
}
EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);

/* sysfs attributes */
static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct pcf50633 *pcf = dev_get_drvdata(dev);
	u8 dump[16];
	int n, n1, idx = 0;
	char *buf1 = buf;
	static u8 address_no_read[] = { /* must be ascending */
		PCF50633_REG_INT1,
		PCF50633_REG_INT2,
		PCF50633_REG_INT3,
		PCF50633_REG_INT4,
		PCF50633_REG_INT5,
		0 /* terminator */
	};

	for (n = 0; n < 256; n += sizeof(dump)) {
		for (n1 = 0; n1 < sizeof(dump); n1++)
			if (n == address_no_read[idx]) {
				idx++;
				dump[n1] = 0x00;
			} else
				dump[n1] = pcf50633_reg_read(pcf, n + n1);

		hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
		buf1 += strlen(buf1);
		*buf1++ = '\n';
		*buf1 = '\0';
	}

	return buf1 - buf;
}
static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);

static ssize_t show_resume_reason(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct pcf50633 *pcf = dev_get_drvdata(dev);
	int n;

	n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
				pcf->resume_reason[0],
				pcf->resume_reason[1],
				pcf->resume_reason[2],
				pcf->resume_reason[3],
				pcf->resume_reason[4]);

	return n;
}
static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);

static struct attribute *pcf_sysfs_entries[] = {
	&dev_attr_dump_regs.attr,
	&dev_attr_resume_reason.attr,
	NULL,
};

static struct attribute_group pcf_attr_group = {
	.name	= NULL,			/* put in device directory */
	.attrs	= pcf_sysfs_entries,
};

static void
pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
						struct platform_device **pdev)
{
	int ret;

	*pdev = platform_device_alloc(name, -1);
	if (!*pdev) {
		dev_err(pcf->dev, "Falied to allocate %s\n", name);
		return;
	}

	(*pdev)->dev.parent = pcf->dev;

	ret = platform_device_add(*pdev);
	if (ret) {
		dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
		platform_device_put(*pdev);
		*pdev = NULL;
	}
}

#ifdef CONFIG_PM_SLEEP
static int pcf50633_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct pcf50633 *pcf = i2c_get_clientdata(client);

	return pcf50633_irq_suspend(pcf);
}

static int pcf50633_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct pcf50633 *pcf = i2c_get_clientdata(client);

	return pcf50633_irq_resume(pcf);
}
#endif

static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);

static struct regmap_config pcf50633_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static int pcf50633_probe(struct i2c_client *client,
				const struct i2c_device_id *ids)
{
	struct pcf50633 *pcf;
	struct pcf50633_platform_data *pdata = client->dev.platform_data;
	int i, ret;
	int version, variant;

	if (!client->irq) {
		dev_err(&client->dev, "Missing IRQ\n");
		return -ENOENT;
	}

	pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
	if (!pcf)
		return -ENOMEM;

	pcf->pdata = pdata;

	mutex_init(&pcf->lock);

	pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
	if (IS_ERR(pcf->regmap)) {
		ret = PTR_ERR(pcf->regmap);
		dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
		return ret;
	}

	i2c_set_clientdata(client, pcf);
	pcf->dev = &client->dev;

	version = pcf50633_reg_read(pcf, 0);
	variant = pcf50633_reg_read(pcf, 1);
	if (version < 0 || variant < 0) {
		dev_err(pcf->dev, "Unable to probe pcf50633\n");
		ret = -ENODEV;
		return ret;
	}

	dev_info(pcf->dev, "Probed device version %d variant %d\n",
							version, variant);

	pcf50633_irq_init(pcf, client->irq);

	/* Create sub devices */
	pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);


	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
		struct platform_device *pdev;

		pdev = platform_device_alloc("pcf50633-regltr", i);
		if (!pdev) {
			dev_err(pcf->dev, "Cannot create regulator %d\n", i);
			continue;
		}

		pdev->dev.parent = pcf->dev;
		if (platform_device_add_data(pdev, &pdata->reg_init_data[i],
					sizeof(pdata->reg_init_data[i])) < 0) {
			platform_device_put(pdev);
			dev_err(pcf->dev, "Out of memory for regulator parameters %d\n",
									i);
			continue;
		}
		pcf->regulator_pdev[i] = pdev;

		platform_device_add(pdev);
	}

	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
	if (ret)
		dev_err(pcf->dev, "error creating sysfs entries\n");

	if (pdata->probe_done)
		pdata->probe_done(pcf);

	return 0;
}

static int __devexit pcf50633_remove(struct i2c_client *client)
{
	struct pcf50633 *pcf = i2c_get_clientdata(client);
	int i;

	sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
	pcf50633_irq_free(pcf);

	platform_device_unregister(pcf->input_pdev);
	platform_device_unregister(pcf->rtc_pdev);
	platform_device_unregister(pcf->mbc_pdev);
	platform_device_unregister(pcf->adc_pdev);
	platform_device_unregister(pcf->bl_pdev);

	for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
		platform_device_unregister(pcf->regulator_pdev[i]);

	return 0;
}

static const struct i2c_device_id pcf50633_id_table[] = {
	{"pcf50633", 0x73},
	{/* end of list */}
};
MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);

static struct i2c_driver pcf50633_driver = {
	.driver = {
		.name	= "pcf50633",
		.pm	= &pcf50633_pm,
	},
	.id_table = pcf50633_id_table,
	.probe = pcf50633_probe,
	.remove = pcf50633_remove,
};

static int __init pcf50633_init(void)
{
	return i2c_add_driver(&pcf50633_driver);
}

static void __exit pcf50633_exit(void)
{
	i2c_del_driver(&pcf50633_driver);
}

MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
MODULE_LICENSE("GPL");

subsys_initcall(pcf50633_init);
module_exit(pcf50633_exit);
Commit	Line	Data
f52046b1 BR	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>
f52046b1 BR	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>
939941d4	24	#include <linux/pm.h>
5a0e3ad6	25	#include <linux/slab.h>
6e3ad118 MB	26	#include <linux/regmap.h>
6e3ad118 MB	27	#include <linux/err.h>
f52046b1 BR	28
	29	#include <linux/mfd/pcf50633/core.h>
	30
25985edc	31	/* Read a block of up to 32 regs */
f52046b1 BR	32	int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
	33	int nr_regs, u8 *data)
	34	{
	35	int ret;
	36
6e3ad118 MB	37	ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
	38	if (ret != 0)
	39	return ret;
f52046b1	40
6e3ad118	41	return nr_regs;
f52046b1 BR	42	}
	43	EXPORT_SYMBOL_GPL(pcf50633_read_block);
	44
25985edc	45	/* Write a block of up to 32 regs */
f52046b1 BR	46	int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
	47	int nr_regs, u8 *data)
	48	{
60b5c5a4	49	return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
f52046b1 BR	50	}
	51	EXPORT_SYMBOL_GPL(pcf50633_write_block);
	52
	53	u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
	54	{
6e3ad118 MB	55	unsigned int val;
6e3ad118 MB	56	int ret;
f52046b1	57
6e3ad118 MB	58	ret = regmap_read(pcf->regmap, reg, &val);
	59	if (ret < 0)
	60	return -1;
f52046b1 BR	61
	62	return val;
	63	}
	64	EXPORT_SYMBOL_GPL(pcf50633_reg_read);
	65
	66	int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
	67	{
6e3ad118	68	return regmap_write(pcf->regmap, reg, val);
f52046b1 BR	69	}
	70	EXPORT_SYMBOL_GPL(pcf50633_reg_write);
	71
	72	int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
	73	{
6e3ad118	74	return regmap_update_bits(pcf->regmap, reg, mask, val);
f52046b1 BR	75	}
	76	EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
	77
	78	int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
	79	{
6e3ad118	80	return regmap_update_bits(pcf->regmap, reg, val, 0);
f52046b1 BR	81	}
	82	EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
	83
	84	/* sysfs attributes */
	85	static 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	hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
	110	buf1 += strlen(buf1);
	111	*buf1++ = '\n';
	112	*buf1 = '\0';
	113	}
	114
	115	return buf1 - buf;
	116	}
	117	static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
	118
	119	static ssize_t show_resume_reason(struct device *dev,
	120	struct device_attribute attr, char buf)
	121	{
	122	struct pcf50633 *pcf = dev_get_drvdata(dev);
	123	int n;
	124
	125	n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
	126	pcf->resume_reason[0],
	127	pcf->resume_reason[1],
	128	pcf->resume_reason[2],
	129	pcf->resume_reason[3],
	130	pcf->resume_reason[4]);
	131
	132	return n;
	133	}
	134	static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
	135
	136	static struct attribute *pcf_sysfs_entries[] = {
	137	&dev_attr_dump_regs.attr,
	138	&dev_attr_resume_reason.attr,
	139	NULL,
	140	};
	141
	142	static struct attribute_group pcf_attr_group = {
	143	.name = NULL, /* put in device directory */
	144	.attrs = pcf_sysfs_entries,
145	};
146
f52046b1 BR	147	static void
	148	pcf50633_client_dev_register(struct pcf50633 pcf, const char name,
	149	struct platform_device **pdev)
	150	{
f52046b1 BR	151	int ret;
	152
	153	*pdev = platform_device_alloc(name, -1);
	154	if (!*pdev) {
	155	dev_err(pcf->dev, "Falied to allocate %s\n", name);
	156	return;
	157	}
	158
f52046b1 BR	159	(*pdev)->dev.parent = pcf->dev;
	160
	161	ret = platform_device_add(*pdev);
	162	if (ret) {
	163	dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
	164	platform_device_put(*pdev);
	165	*pdev = NULL;
	166	}
	167	}
	168
939941d4 MB	169	#ifdef CONFIG_PM_SLEEP
939941d4 MB	170	static int pcf50633_suspend(struct device *dev)
f52046b1	171	{
939941d4 MB	172	struct i2c_client *client = to_i2c_client(dev);
939941d4 MB	173	struct pcf50633 *pcf = i2c_get_clientdata(client);
f52046b1	174
380c09f6	175	return pcf50633_irq_suspend(pcf);
f52046b1 BR	176	}
f52046b1 BR	177
939941d4	178	static int pcf50633_resume(struct device *dev)
f52046b1	179	{
939941d4 MB	180	struct i2c_client *client = to_i2c_client(dev);
939941d4 MB	181	struct pcf50633 *pcf = i2c_get_clientdata(client);
f52046b1	182
380c09f6	183	return pcf50633_irq_resume(pcf);
f52046b1	184	}
f52046b1 BR	185	#endif
f52046b1 BR	186
939941d4 MB	187	static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
939941d4 MB	188
6e3ad118 MB	189	static struct regmap_config pcf50633_regmap_config = {
	190	.reg_bits = 8,
	191	.val_bits = 8,
	192	};
	193
f791be49	194	static int pcf50633_probe(struct i2c_client *client,
f52046b1 BR	195	const struct i2c_device_id *ids)
	196	{
	197	struct pcf50633 *pcf;
	198	struct pcf50633_platform_data *pdata = client->dev.platform_data;
24213ae1	199	int i, ret;
f52046b1 BR	200	int version, variant;
f52046b1 BR	201
24213ae1 LPC	202	if (!client->irq) {
	203	dev_err(&client->dev, "Missing IRQ\n");
	204	return -ENOENT;
	205	}
	206
aa4603a0	207	pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
f52046b1 BR	208	if (!pcf)
	209	return -ENOMEM;
	210
	211	pcf->pdata = pdata;
	212
	213	mutex_init(&pcf->lock);
	214
aa4603a0	215	pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
6e3ad118 MB	216	if (IS_ERR(pcf->regmap)) {
6e3ad118 MB	217	ret = PTR_ERR(pcf->regmap);
aa4603a0 AL	218	dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
aa4603a0 AL	219	return ret;
6e3ad118 MB	220	}
6e3ad118 MB	221
f52046b1 BR	222	i2c_set_clientdata(client, pcf);
f52046b1 BR	223	pcf->dev = &client->dev;
f52046b1 BR	224
	225	version = pcf50633_reg_read(pcf, 0);
	226	variant = pcf50633_reg_read(pcf, 1);
	227	if (version < 0 \|\| variant < 0) {
	228	dev_err(pcf->dev, "Unable to probe pcf50633\n");
	229	ret = -ENODEV;
aa4603a0	230	return ret;
f52046b1 BR	231	}
	232
	233	dev_info(pcf->dev, "Probed device version %d variant %d\n",
	234	version, variant);
	235
380c09f6	236	pcf50633_irq_init(pcf, client->irq);
24213ae1	237
f52046b1	238	/* Create sub devices */
aa4603a0 AL	239	pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
	240	pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
	241	pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
	242	pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
	243	pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);
f5bf403a	244
f52046b1 BR	245
	246	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
	247	struct platform_device *pdev;
	248
	249	pdev = platform_device_alloc("pcf50633-regltr", i);
	250	if (!pdev) {
24213ae1	251	dev_err(pcf->dev, "Cannot create regulator %d\n", i);
f52046b1 BR	252	continue;
	253	}
	254
	255	pdev->dev.parent = pcf->dev;
18273c5b AC	256	if (platform_device_add_data(pdev, &pdata->reg_init_data[i],
	257	sizeof(pdata->reg_init_data[i])) < 0) {
	258	platform_device_put(pdev);
	259	dev_err(pcf->dev, "Out of memory for regulator parameters %d\n",
	260	i);
	261	continue;
	262	}
f52046b1 BR	263	pcf->regulator_pdev[i] = pdev;
	264
	265	platform_device_add(pdev);
	266	}
	267
f52046b1 BR	268	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
	269	if (ret)
	270	dev_err(pcf->dev, "error creating sysfs entries\n");
	271
	272	if (pdata->probe_done)
	273	pdata->probe_done(pcf);
	274
	275	return 0;
f52046b1 BR	276	}
	277
	278	static int __devexit pcf50633_remove(struct i2c_client *client)
	279	{
	280	struct pcf50633 *pcf = i2c_get_clientdata(client);
	281	int i;
	282
8220fe4c	283	sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
380c09f6	284	pcf50633_irq_free(pcf);
f52046b1 BR	285
	286	platform_device_unregister(pcf->input_pdev);
	287	platform_device_unregister(pcf->rtc_pdev);
	288	platform_device_unregister(pcf->mbc_pdev);
	289	platform_device_unregister(pcf->adc_pdev);
8220fe4c	290	platform_device_unregister(pcf->bl_pdev);
f52046b1 BR	291
	292	for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
	293	platform_device_unregister(pcf->regulator_pdev[i]);
	294
f52046b1 BR	295	return 0;
	296	}
	297
1206552b	298	static const struct i2c_device_id pcf50633_id_table[] = {
f52046b1	299	{"pcf50633", 0x73},
8915e540	300	{/* end of list */}
f52046b1	301	};
7679089d	302	MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
f52046b1 BR	303
	304	static struct i2c_driver pcf50633_driver = {
	305	.driver = {
	306	.name = "pcf50633",
939941d4	307	.pm = &pcf50633_pm,
f52046b1 BR	308	},
	309	.id_table = pcf50633_id_table,
	310	.probe = pcf50633_probe,
84449216	311	.remove = pcf50633_remove,
f52046b1 BR	312	};
	313
	314	static int __init pcf50633_init(void)
	315	{
	316	return i2c_add_driver(&pcf50633_driver);
	317	}
	318
	319	static void __exit pcf50633_exit(void)
	320	{
	321	i2c_del_driver(&pcf50633_driver);
	322	}
	323
	324	MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
	325	MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
	326	MODULE_LICENSE("GPL");
	327
2021de87	328	subsys_initcall(pcf50633_init);
f52046b1	329	module_exit(pcf50633_exit);