[mirror_ubuntu-artful-kernel.git] / drivers / mfd / tps65912-core.c

/*
 * tps65912-core.c  --  TI TPS65912x
 *
 * Copyright 2011 Texas Instruments Inc.
 *
 * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
 *
 *  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.
 *
 *  This driver is based on wm8350 implementation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65912.h>

static struct mfd_cell tps65912s[] = {
	{
		.name = "tps65912-pmic",
	},
};

int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
{
	u8 data;
	int err;

	mutex_lock(&tps65912->io_mutex);

	err = tps65912->read(tps65912, reg, 1, &data);
	if (err) {
		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
		goto out;
	}

	data |= mask;
	err = tps65912->write(tps65912, reg, 1, &data);
	if (err)
		dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps65912->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65912_set_bits);

int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
{
	u8 data;
	int err;

	mutex_lock(&tps65912->io_mutex);
	err = tps65912->read(tps65912, reg, 1, &data);
	if (err) {
		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
		goto out;
	}

	data &= ~mask;
	err = tps65912->write(tps65912, reg, 1, &data);
	if (err)
		dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps65912->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65912_clear_bits);

static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
{
	u8 val;
	int err;

	err = tps65912->read(tps65912, reg, 1, &val);
	if (err < 0)
		return err;

	return val;
}

static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
{
	return tps65912->write(tps65912, reg, 1, &val);
}

int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
{
	int data;

	mutex_lock(&tps65912->io_mutex);

	data = tps65912_read(tps65912, reg);
	if (data < 0)
		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);

	mutex_unlock(&tps65912->io_mutex);
	return data;
}
EXPORT_SYMBOL_GPL(tps65912_reg_read);

int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
{
	int err;

	mutex_lock(&tps65912->io_mutex);

	err = tps65912_write(tps65912, reg, val);
	if (err < 0)
		dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);

	mutex_unlock(&tps65912->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65912_reg_write);

int tps65912_device_init(struct tps65912 *tps65912)
{
	struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
	struct tps65912_platform_data *init_data;
	int ret, dcdc_avs, value;

	init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
	if (init_data == NULL)
		return -ENOMEM;

	init_data->irq = pmic_plat_data->irq;
	init_data->irq_base = pmic_plat_data->irq;

	mutex_init(&tps65912->io_mutex);
	dev_set_drvdata(tps65912->dev, tps65912);

	dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
			pmic_plat_data->is_dcdc2_avs  << 1 |
				pmic_plat_data->is_dcdc3_avs << 2 |
					pmic_plat_data->is_dcdc4_avs << 3);
	if (dcdc_avs) {
		tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
		dcdc_avs |= value;
		tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
	}

	ret = mfd_add_devices(tps65912->dev, -1,
			      tps65912s, ARRAY_SIZE(tps65912s),
			      NULL, 0);
	if (ret < 0)
		goto err;

	ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
	if (ret < 0)
		goto err;

	return ret;

err:
	kfree(init_data);
	mfd_remove_devices(tps65912->dev);
	kfree(tps65912);
	return ret;
}

void tps65912_device_exit(struct tps65912 *tps65912)
{
	mfd_remove_devices(tps65912->dev);
	kfree(tps65912);
}

MODULE_AUTHOR("Margarita Olaya	<magi@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
36e52873 MO	1	/*
	2	* tps65912-core.c -- TI TPS65912x
	3	*
	4	* Copyright 2011 Texas Instruments Inc.
	5	*
	6	* Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
	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	* This driver is based on wm8350 implementation.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/moduleparam.h>
	18	#include <linux/init.h>
	19	#include <linux/slab.h>
	20	#include <linux/gpio.h>
	21	#include <linux/mfd/core.h>
	22	#include <linux/mfd/tps65912.h>
	23
	24	static struct mfd_cell tps65912s[] = {
	25	{
	26	.name = "tps65912-pmic",
	27	},
	28	};
	29
	30	int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
	31	{
	32	u8 data;
	33	int err;
	34
	35	mutex_lock(&tps65912->io_mutex);
	36
	37	err = tps65912->read(tps65912, reg, 1, &data);
	38	if (err) {
	39	dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
	40	goto out;
	41	}
	42
	43	data \|= mask;
	44	err = tps65912->write(tps65912, reg, 1, &data);
	45	if (err)
	46	dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
	47
	48	out:
	49	mutex_unlock(&tps65912->io_mutex);
	50	return err;
	51	}
	52	EXPORT_SYMBOL_GPL(tps65912_set_bits);
	53
	54	int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
	55	{
	56	u8 data;
	57	int err;
	58
	59	mutex_lock(&tps65912->io_mutex);
	60	err = tps65912->read(tps65912, reg, 1, &data);
	61	if (err) {
	62	dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
	63	goto out;
	64	}
65
66	data &= ~mask;
67	err = tps65912->write(tps65912, reg, 1, &data);
68	if (err)
69	dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
70
71	out:
72	mutex_unlock(&tps65912->io_mutex);
73	return err;
74	}
75	EXPORT_SYMBOL_GPL(tps65912_clear_bits);
76
77	static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
78	{
79	u8 val;
80	int err;
81
82	err = tps65912->read(tps65912, reg, 1, &val);
83	if (err < 0)
84	return err;
85
86	return val;
87	}
88
89	static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
90	{
91	return tps65912->write(tps65912, reg, 1, &val);
92	}
93
94	int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
95	{
96	int data;
97
98	mutex_lock(&tps65912->io_mutex);
99
100	data = tps65912_read(tps65912, reg);
101	if (data < 0)
102	dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
103
104	mutex_unlock(&tps65912->io_mutex);
105	return data;
106	}
107	EXPORT_SYMBOL_GPL(tps65912_reg_read);
108
109	int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
110	{
111	int err;
112
113	mutex_lock(&tps65912->io_mutex);
114
115	err = tps65912_write(tps65912, reg, val);
116	if (err < 0)
117	dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);
118
119	mutex_unlock(&tps65912->io_mutex);
120	return err;
121	}
122	EXPORT_SYMBOL_GPL(tps65912_reg_write);
123
124	int tps65912_device_init(struct tps65912 *tps65912)
125	{
126	struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
d49a0f3f	127	struct tps65912_platform_data *init_data;
36e52873 MO	128	int ret, dcdc_avs, value;
36e52873 MO	129
d49a0f3f MO	130	init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
	131	if (init_data == NULL)
	132	return -ENOMEM;
	133
	134	init_data->irq = pmic_plat_data->irq;
	135	init_data->irq_base = pmic_plat_data->irq;
	136
36e52873 MO	137	mutex_init(&tps65912->io_mutex);
	138	dev_set_drvdata(tps65912->dev, tps65912);
	139
	140	dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 \|
	141	pmic_plat_data->is_dcdc2_avs << 1 \|
	142	pmic_plat_data->is_dcdc3_avs << 2 \|
	143	pmic_plat_data->is_dcdc4_avs << 3);
	144	if (dcdc_avs) {
	145	tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
	146	dcdc_avs \|= value;
	147	tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
	148	}
	149
	150	ret = mfd_add_devices(tps65912->dev, -1,
	151	tps65912s, ARRAY_SIZE(tps65912s),
	152	NULL, 0);
	153	if (ret < 0)
	154	goto err;
	155
d49a0f3f MO	156	ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
	157	if (ret < 0)
	158	goto err;
	159
36e52873 MO	160	return ret;
	161
	162	err:
d49a0f3f	163	kfree(init_data);
36e52873 MO	164	mfd_remove_devices(tps65912->dev);
	165	kfree(tps65912);
	166	return ret;
	167	}
	168
	169	void tps65912_device_exit(struct tps65912 *tps65912)
	170	{
	171	mfd_remove_devices(tps65912->dev);
	172	kfree(tps65912);
	173	}
	174
	175	MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
	176	MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
	177	MODULE_LICENSE("GPL");