mirror of
https://github.com/torvalds/linux.git
synced 2024-11-20 11:01:38 +00:00
a01779f89f
Add basic support for the System Power Management Interface (SPMI) bus. This is a simple implementation which only implements register accesses via the Extended Register Read/Write Long commands. Signed-off-by: Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Mark Brown <broonie@linaro.org>
91 lines
2.7 KiB
C
91 lines
2.7 KiB
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, ®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");
|