37613fa5b7
There were a few files in the regmap code that did not have SPDX identifiers on them, so fix that up. At the same time, remove the "free form" text that specified the license of the file, as that is impossible for any tool to properly parse. Also, as Mark loves // comment markers, convert all of the headers to be the same to make things look consistent :) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Mark Brown <broonie@kernel.org>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Register map access API - SPI support
|
|
//
|
|
// Copyright 2011 Wolfson Microelectronics plc
|
|
//
|
|
// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
|
|
#include <linux/regmap.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "internal.h"
|
|
|
|
struct regmap_async_spi {
|
|
struct regmap_async core;
|
|
struct spi_message m;
|
|
struct spi_transfer t[2];
|
|
};
|
|
|
|
static void regmap_spi_complete(void *data)
|
|
{
|
|
struct regmap_async_spi *async = data;
|
|
|
|
regmap_async_complete_cb(&async->core, async->m.status);
|
|
}
|
|
|
|
static int regmap_spi_write(void *context, const void *data, size_t count)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
|
|
return spi_write(spi, data, count);
|
|
}
|
|
|
|
static int regmap_spi_gather_write(void *context,
|
|
const void *reg, size_t reg_len,
|
|
const void *val, size_t val_len)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
struct spi_message m;
|
|
struct spi_transfer t[2] = { { .tx_buf = reg, .len = reg_len, },
|
|
{ .tx_buf = val, .len = val_len, }, };
|
|
|
|
spi_message_init(&m);
|
|
spi_message_add_tail(&t[0], &m);
|
|
spi_message_add_tail(&t[1], &m);
|
|
|
|
return spi_sync(spi, &m);
|
|
}
|
|
|
|
static int regmap_spi_async_write(void *context,
|
|
const void *reg, size_t reg_len,
|
|
const void *val, size_t val_len,
|
|
struct regmap_async *a)
|
|
{
|
|
struct regmap_async_spi *async = container_of(a,
|
|
struct regmap_async_spi,
|
|
core);
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
|
|
async->t[0].tx_buf = reg;
|
|
async->t[0].len = reg_len;
|
|
async->t[1].tx_buf = val;
|
|
async->t[1].len = val_len;
|
|
|
|
spi_message_init(&async->m);
|
|
spi_message_add_tail(&async->t[0], &async->m);
|
|
if (val)
|
|
spi_message_add_tail(&async->t[1], &async->m);
|
|
|
|
async->m.complete = regmap_spi_complete;
|
|
async->m.context = async;
|
|
|
|
return spi_async(spi, &async->m);
|
|
}
|
|
|
|
static struct regmap_async *regmap_spi_async_alloc(void)
|
|
{
|
|
struct regmap_async_spi *async_spi;
|
|
|
|
async_spi = kzalloc(sizeof(*async_spi), GFP_KERNEL);
|
|
if (!async_spi)
|
|
return NULL;
|
|
|
|
return &async_spi->core;
|
|
}
|
|
|
|
static int regmap_spi_read(void *context,
|
|
const void *reg, size_t reg_size,
|
|
void *val, size_t val_size)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
|
|
return spi_write_then_read(spi, reg, reg_size, val, val_size);
|
|
}
|
|
|
|
static const struct regmap_bus regmap_spi = {
|
|
.write = regmap_spi_write,
|
|
.gather_write = regmap_spi_gather_write,
|
|
.async_write = regmap_spi_async_write,
|
|
.async_alloc = regmap_spi_async_alloc,
|
|
.read = regmap_spi_read,
|
|
.read_flag_mask = 0x80,
|
|
.reg_format_endian_default = REGMAP_ENDIAN_BIG,
|
|
.val_format_endian_default = REGMAP_ENDIAN_BIG,
|
|
};
|
|
|
|
struct regmap *__regmap_init_spi(struct spi_device *spi,
|
|
const struct regmap_config *config,
|
|
struct lock_class_key *lock_key,
|
|
const char *lock_name)
|
|
{
|
|
return __regmap_init(&spi->dev, ®map_spi, &spi->dev, config,
|
|
lock_key, lock_name);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__regmap_init_spi);
|
|
|
|
struct regmap *__devm_regmap_init_spi(struct spi_device *spi,
|
|
const struct regmap_config *config,
|
|
struct lock_class_key *lock_key,
|
|
const char *lock_name)
|
|
{
|
|
return __devm_regmap_init(&spi->dev, ®map_spi, &spi->dev, config,
|
|
lock_key, lock_name);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__devm_regmap_init_spi);
|
|
|
|
MODULE_LICENSE("GPL");
|