1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright(c) 2015-17 Intel Corporation.
4 #include <linux/device.h>
5 #include <linux/module.h>
6 #include <linux/soundwire/sdw.h>
9 static int regmap_sdw_write(void *context, unsigned int reg, unsigned int val)
11 struct device *dev = context;
12 struct sdw_slave *slave = dev_to_sdw_dev(dev);
14 return sdw_write_no_pm(slave, reg, val);
17 static int regmap_sdw_read(void *context, unsigned int reg, unsigned int *val)
19 struct device *dev = context;
20 struct sdw_slave *slave = dev_to_sdw_dev(dev);
23 read = sdw_read_no_pm(slave, reg);
31 static struct regmap_bus regmap_sdw = {
32 .reg_read = regmap_sdw_read,
33 .reg_write = regmap_sdw_write,
34 .reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
35 .val_format_endian_default = REGMAP_ENDIAN_LITTLE,
38 static int regmap_sdw_config_check(const struct regmap_config *config)
40 /* All register are 8-bits wide as per MIPI Soundwire 1.0 Spec */
41 if (config->val_bits != 8)
44 /* Registers are 32 bits wide */
45 if (config->reg_bits != 32)
48 if (config->pad_bits != 0)
54 struct regmap *__regmap_init_sdw(struct sdw_slave *sdw,
55 const struct regmap_config *config,
56 struct lock_class_key *lock_key,
57 const char *lock_name)
61 ret = regmap_sdw_config_check(config);
65 return __regmap_init(&sdw->dev, ®map_sdw,
66 &sdw->dev, config, lock_key, lock_name);
68 EXPORT_SYMBOL_GPL(__regmap_init_sdw);
70 struct regmap *__devm_regmap_init_sdw(struct sdw_slave *sdw,
71 const struct regmap_config *config,
72 struct lock_class_key *lock_key,
73 const char *lock_name)
77 ret = regmap_sdw_config_check(config);
81 return __devm_regmap_init(&sdw->dev, ®map_sdw,
82 &sdw->dev, config, lock_key, lock_name);
84 EXPORT_SYMBOL_GPL(__devm_regmap_init_sdw);
86 MODULE_DESCRIPTION("Regmap SoundWire Module");
87 MODULE_LICENSE("GPL v2");