forked from luck/tmp_suning_uos_patched
6445500b43
Add basic support for i3c bus. This is a simple implementation that only give support for SDR Read and Write commands. Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Signed-off-by: Mark Brown <broonie@kernel.org>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
|
|
|
|
#include <linux/regmap.h>
|
|
#include <linux/i3c/device.h>
|
|
#include <linux/i3c/master.h>
|
|
#include <linux/module.h>
|
|
|
|
static int regmap_i3c_write(void *context, const void *data, size_t count)
|
|
{
|
|
struct device *dev = context;
|
|
struct i3c_device *i3c = dev_to_i3cdev(dev);
|
|
struct i3c_priv_xfer xfers[] = {
|
|
{
|
|
.rnw = false,
|
|
.len = count,
|
|
.data.out = data,
|
|
},
|
|
};
|
|
|
|
return i3c_device_do_priv_xfers(i3c, xfers, 1);
|
|
}
|
|
|
|
static int regmap_i3c_read(void *context,
|
|
const void *reg, size_t reg_size,
|
|
void *val, size_t val_size)
|
|
{
|
|
struct device *dev = context;
|
|
struct i3c_device *i3c = dev_to_i3cdev(dev);
|
|
struct i3c_priv_xfer xfers[2];
|
|
|
|
xfers[0].rnw = false;
|
|
xfers[0].len = reg_size;
|
|
xfers[0].data.out = reg;
|
|
|
|
xfers[1].rnw = true;
|
|
xfers[1].len = val_size;
|
|
xfers[1].data.in = val;
|
|
|
|
return i3c_device_do_priv_xfers(i3c, xfers, 2);
|
|
}
|
|
|
|
static struct regmap_bus regmap_i3c = {
|
|
.write = regmap_i3c_write,
|
|
.read = regmap_i3c_read,
|
|
};
|
|
|
|
struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
|
|
const struct regmap_config *config,
|
|
struct lock_class_key *lock_key,
|
|
const char *lock_name)
|
|
{
|
|
return __devm_regmap_init(&i3c->dev, ®map_i3c, &i3c->dev, config,
|
|
lock_key, lock_name);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
|
|
|
|
MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
|
|
MODULE_DESCRIPTION("Regmap I3C Module");
|
|
MODULE_LICENSE("GPL v2");
|