[deliverable/linux.git] / drivers / base / regmap / regmap-spmi.c

/*
 * Register map access API - SPMI support
 *
 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
 *
 * Based on regmap-i2c.c:
 * Copyright 2011 Wolfson Microelectronics plc
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */
#include <linux/regmap.h>
#include <linux/spmi.h>
#include <linux/module.h>
#include <linux/init.h>

static int regmap_spmi_read(void *context,
			    const void *reg, size_t reg_size,
			    void *val, size_t val_size)
{
	BUG_ON(reg_size != 2);
	return spmi_ext_register_readl(context, *(u16 *)reg,
				       val, val_size);
}

static int regmap_spmi_gather_write(void *context,
				    const void *reg, size_t reg_size,
				    const void *val, size_t val_size)
{
	BUG_ON(reg_size != 2);
	return spmi_ext_register_writel(context, *(u16 *)reg, val, val_size);
}

static int regmap_spmi_write(void *context, const void *data,
			     size_t count)
{
	BUG_ON(count < 2);
	return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2);
}

static struct regmap_bus regmap_spmi = {
	.read				= regmap_spmi_read,
	.write				= regmap_spmi_write,
	.gather_write			= regmap_spmi_gather_write,
	.reg_format_endian_default	= REGMAP_ENDIAN_NATIVE,
	.val_format_endian_default	= REGMAP_ENDIAN_NATIVE,
};

/**
 * regmap_init_spmi(): Initialize register map
 *
 * @sdev: Device that will be interacted with
 * @config: Configuration for register map
 *
 * The return value will be an ERR_PTR() on error or a valid pointer to
 * a struct regmap.
 */
struct regmap *regmap_init_spmi(struct spmi_device *sdev,
				const struct regmap_config *config)
{
	return regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
}
EXPORT_SYMBOL_GPL(regmap_init_spmi);

/**
 * devm_regmap_init_spmi(): Initialise managed register map
 *
 * @sdev: Device that will be interacted with
 * @config: Configuration for register map
 *
 * The return value will be an ERR_PTR() on error or a valid pointer
 * to a struct regmap.  The regmap will be automatically freed by the
 * device management code.
 */
struct regmap *devm_regmap_init_spmi(struct spmi_device *sdev,
				     const struct regmap_config *config)
{
	return devm_regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_spmi);

MODULE_LICENSE("GPL");
Commit	Line	Data
a01779f8 JC	1	/*
	2	* Register map access API - SPMI support
	3	*
	4	* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
	5	*
	6	* Based on regmap-i2c.c:
	7	* Copyright 2011 Wolfson Microelectronics plc
	8	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 and
	12	* only version 2 as published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	*/
	20	#include <linux/regmap.h>
	21	#include <linux/spmi.h>
	22	#include <linux/module.h>
	23	#include <linux/init.h>
	24
	25	static int regmap_spmi_read(void *context,
	26	const void *reg, size_t reg_size,
	27	void *val, size_t val_size)
	28	{
	29	BUG_ON(reg_size != 2);
	30	return spmi_ext_register_readl(context, (u16 )reg,
	31	val, val_size);
	32	}
	33
	34	static int regmap_spmi_gather_write(void *context,
	35	const void *reg, size_t reg_size,
	36	const void *val, size_t val_size)
	37	{
	38	BUG_ON(reg_size != 2);
	39	return spmi_ext_register_writel(context, (u16 )reg, val, val_size);
	40	}
	41
	42	static int regmap_spmi_write(void context, const void data,
	43	size_t count)
	44	{
	45	BUG_ON(count < 2);
	46	return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2);
	47	}
	48
	49	static struct regmap_bus regmap_spmi = {
	50	.read = regmap_spmi_read,
	51	.write = regmap_spmi_write,
	52	.gather_write = regmap_spmi_gather_write,
	53	.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
	54	.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
	55	};
	56
	57	/**
	58	* regmap_init_spmi(): Initialize register map
	59	*
	60	* @sdev: Device that will be interacted with
	61	* @config: Configuration for register map
	62	*
	63	* The return value will be an ERR_PTR() on error or a valid pointer to
	64	* a struct regmap.
65	*/
66	struct regmap regmap_init_spmi(struct spmi_device sdev,
67	const struct regmap_config *config)
68	{
69	return regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
70	}
71	EXPORT_SYMBOL_GPL(regmap_init_spmi);
72
73	/**
74	* devm_regmap_init_spmi(): Initialise managed register map
75	*
76	* @sdev: Device that will be interacted with
77	* @config: Configuration for register map
78	*
79	* The return value will be an ERR_PTR() on error or a valid pointer
80	* to a struct regmap. The regmap will be automatically freed by the
81	* device management code.
82	*/
83	struct regmap devm_regmap_init_spmi(struct spmi_device sdev,
84	const struct regmap_config *config)
85	{
86	return devm_regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
87	}
88	EXPORT_SYMBOL_GPL(devm_regmap_init_spmi);
89
90	MODULE_LICENSE("GPL");