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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017, Linaro Ltd.
#include <linux/regmap.h>
#include <linux/slimbus.h>
#include <linux/module.h>
#include "internal.h"
static int regmap_slimbus_write(void *context, const void *data, size_t count)
{
struct slim_device *sdev = context;
return slim_write(sdev, *(u16 *)data, count - 2, (u8 *)data + 2);
}
static int regmap_slimbus_read(void *context, const void *reg, size_t reg_size,
void *val, size_t val_size)
{
struct slim_device *sdev = context;
return slim_read(sdev, *(u16 *)reg, val_size, val);
}
static const struct regmap_bus regmap_slimbus_bus = {
.write = regmap_slimbus_write,
.read = regmap_slimbus_read,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
.val_format_endian_default = REGMAP_ENDIAN_LITTLE,
};
static const struct regmap_bus *regmap_get_slimbus(struct slim_device *slim,
const struct regmap_config *config)
{
if (config->val_bits == 8 && config->reg_bits == 16)
return ®map_slimbus_bus;
return ERR_PTR(-ENOTSUPP);
}
struct regmap *__regmap_init_slimbus(struct slim_device *slimbus,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name)
{
const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config);
if (IS_ERR(bus))
return ERR_CAST(bus);
return __regmap_init(&slimbus->dev, bus, &slimbus->dev, config,
lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__regmap_init_slimbus);
struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name)
{
const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config);
if (IS_ERR(bus))
return ERR_CAST(bus);
return __devm_regmap_init(&slimbus->dev, bus, &slimbus, config,
lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__devm_regmap_init_slimbus);
MODULE_LICENSE("GPL v2");
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