1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
3
4#include <linux/regmap.h>
5#include <linux/i3c/device.h>
6#include <linux/i3c/master.h>
7#include <linux/module.h>
8
9static int regmap_i3c_write(void *context, const void *data, size_t count)
10{
11	struct device *dev = context;
12	struct i3c_device *i3c = dev_to_i3cdev(dev);
13	struct i3c_priv_xfer xfers[] = {
14		{
15			.rnw = false,
16			.len = count,
17			.data.out = data,
18		},
19	};
20
21	return i3c_device_do_priv_xfers(i3c, xfers, 1);
22}
23
24static int regmap_i3c_read(void *context,
25			   const void *reg, size_t reg_size,
26			   void *val, size_t val_size)
27{
28	struct device *dev = context;
29	struct i3c_device *i3c = dev_to_i3cdev(dev);
30	struct i3c_priv_xfer xfers[2];
31
32	xfers[0].rnw = false;
33	xfers[0].len = reg_size;
34	xfers[0].data.out = reg;
35
36	xfers[1].rnw = true;
37	xfers[1].len = val_size;
38	xfers[1].data.in = val;
39
40	return i3c_device_do_priv_xfers(i3c, xfers, 2);
41}
42
43static const struct regmap_bus regmap_i3c = {
44	.write = regmap_i3c_write,
45	.read = regmap_i3c_read,
46};
47
48struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
49				      const struct regmap_config *config,
50				      struct lock_class_key *lock_key,
51				      const char *lock_name)
52{
53	return __devm_regmap_init(&i3c->dev, &regmap_i3c, &i3c->dev, config,
54				  lock_key, lock_name);
55}
56EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
57
58MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
59MODULE_DESCRIPTION("Regmap I3C Module");
60MODULE_LICENSE("GPL v2");
61