1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
3
4 #include <linux/array_size.h>
5 #include <linux/regmap.h>
6 #include <linux/i3c/device.h>
7 #include <linux/i3c/master.h>
8 #include <linux/module.h>
9
regmap_i3c_write(void * context,const void * data,size_t count)10 static int regmap_i3c_write(void *context, const void *data, size_t count)
11 {
12 struct device *dev = context;
13 struct i3c_device *i3c = dev_to_i3cdev(dev);
14 struct i3c_xfer xfers[] = {
15 {
16 .rnw = false,
17 .len = count,
18 .data.out = data,
19 },
20 };
21
22 return i3c_device_do_xfers(i3c, xfers, ARRAY_SIZE(xfers), I3C_SDR);
23 }
24
regmap_i3c_read(void * context,const void * reg,size_t reg_size,void * val,size_t val_size)25 static int regmap_i3c_read(void *context,
26 const void *reg, size_t reg_size,
27 void *val, size_t val_size)
28 {
29 struct device *dev = context;
30 struct i3c_device *i3c = dev_to_i3cdev(dev);
31 struct i3c_xfer xfers[2];
32
33 xfers[0].rnw = false;
34 xfers[0].len = reg_size;
35 xfers[0].data.out = reg;
36
37 xfers[1].rnw = true;
38 xfers[1].len = val_size;
39 xfers[1].data.in = val;
40
41 return i3c_device_do_xfers(i3c, xfers, ARRAY_SIZE(xfers), I3C_SDR);
42 }
43
44 static const struct regmap_bus regmap_i3c = {
45 .write = regmap_i3c_write,
46 .read = regmap_i3c_read,
47 };
48
__devm_regmap_init_i3c(struct i3c_device * i3c,const struct regmap_config * config,struct lock_class_key * lock_key,const char * lock_name)49 struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
50 const struct regmap_config *config,
51 struct lock_class_key *lock_key,
52 const char *lock_name)
53 {
54 return __devm_regmap_init(&i3c->dev, ®map_i3c, &i3c->dev, config,
55 lock_key, lock_name);
56 }
57 EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
58
59 MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
60 MODULE_DESCRIPTION("regmap I3C Module");
61 MODULE_LICENSE("GPL v2");
62