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/*
* 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, ®map_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, ®map_spmi, sdev, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_spmi);
MODULE_LICENSE("GPL");
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