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  
regmap_i3c_write(void * context,const void * data,size_t count)9  static 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  
regmap_i3c_read(void * context,const void * reg,size_t reg_size,void * val,size_t val_size)24  static 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  
43  static const struct regmap_bus regmap_i3c = {
44  	.write = regmap_i3c_write,
45  	.read = regmap_i3c_read,
46  };
47  
__devm_regmap_init_i3c(struct i3c_device * i3c,const struct regmap_config * config,struct lock_class_key * lock_key,const char * lock_name)48  struct 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  }
56  EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
57  
58  MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
59  MODULE_DESCRIPTION("regmap I3C Module");
60  MODULE_LICENSE("GPL v2");
61