1 // SPDX-License-Identifier: GPL-2.0
3 // Register map access API - W1 (1-Wire) support
18  * 1-Wire slaves registers with addess 8 bit and data 8 bit
28 		return -EINVAL;  in w1_reg_a8_v8_read()
30 	mutex_lock(&sl->master->bus_mutex);  in w1_reg_a8_v8_read()
32 		w1_write_8(sl->master, W1_CMD_READ_DATA);  in w1_reg_a8_v8_read()
33 		w1_write_8(sl->master, reg);  in w1_reg_a8_v8_read()
34 		*val = w1_read_8(sl->master);  in w1_reg_a8_v8_read()
36 		ret = -ENODEV;  in w1_reg_a8_v8_read()
38 	mutex_unlock(&sl->master->bus_mutex);  in w1_reg_a8_v8_read()
50 		return -EINVAL;  in w1_reg_a8_v8_write()
52 	mutex_lock(&sl->master->bus_mutex);  in w1_reg_a8_v8_write()
54 		w1_write_8(sl->master, W1_CMD_WRITE_DATA);  in w1_reg_a8_v8_write()
55 		w1_write_8(sl->master, reg);  in w1_reg_a8_v8_write()
56 		w1_write_8(sl->master, val);  in w1_reg_a8_v8_write()
58 		ret = -ENODEV;  in w1_reg_a8_v8_write()
60 	mutex_unlock(&sl->master->bus_mutex);  in w1_reg_a8_v8_write()
66  * 1-Wire slaves registers with addess 8 bit and data 16 bit
77 		return -EINVAL;  in w1_reg_a8_v16_read()
79 	mutex_lock(&sl->master->bus_mutex);  in w1_reg_a8_v16_read()
81 		w1_write_8(sl->master, W1_CMD_READ_DATA);  in w1_reg_a8_v16_read()
82 		w1_write_8(sl->master, reg);  in w1_reg_a8_v16_read()
83 		*val = w1_read_8(sl->master);  in w1_reg_a8_v16_read()
84 		*val |= w1_read_8(sl->master)<<8;  in w1_reg_a8_v16_read()
86 		ret = -ENODEV;  in w1_reg_a8_v16_read()
88 	mutex_unlock(&sl->master->bus_mutex);  in w1_reg_a8_v16_read()
101 		return -EINVAL;  in w1_reg_a8_v16_write()
103 	mutex_lock(&sl->master->bus_mutex);  in w1_reg_a8_v16_write()
105 		w1_write_8(sl->master, W1_CMD_WRITE_DATA);  in w1_reg_a8_v16_write()
106 		w1_write_8(sl->master, reg);  in w1_reg_a8_v16_write()
107 		w1_write_8(sl->master, val & 0x00FF);  in w1_reg_a8_v16_write()
108 		w1_write_8(sl->master, val>>8 & 0x00FF);  in w1_reg_a8_v16_write()
110 		ret = -ENODEV;  in w1_reg_a8_v16_write()
112 	mutex_unlock(&sl->master->bus_mutex);  in w1_reg_a8_v16_write()
118  * 1-Wire slaves registers with addess 16 bit and data 16 bit
129 		return -EINVAL;  in w1_reg_a16_v16_read()
131 	mutex_lock(&sl->master->bus_mutex);  in w1_reg_a16_v16_read()
133 		w1_write_8(sl->master, W1_CMD_READ_DATA);  in w1_reg_a16_v16_read()
134 		w1_write_8(sl->master, reg & 0x00FF);  in w1_reg_a16_v16_read()
135 		w1_write_8(sl->master, reg>>8 & 0x00FF);  in w1_reg_a16_v16_read()
136 		*val = w1_read_8(sl->master);  in w1_reg_a16_v16_read()
137 		*val |= w1_read_8(sl->master)<<8;  in w1_reg_a16_v16_read()
139 		ret = -ENODEV;  in w1_reg_a16_v16_read()
141 	mutex_unlock(&sl->master->bus_mutex);  in w1_reg_a16_v16_read()
154 		return -EINVAL;  in w1_reg_a16_v16_write()
156 	mutex_lock(&sl->master->bus_mutex);  in w1_reg_a16_v16_write()
158 		w1_write_8(sl->master, W1_CMD_WRITE_DATA);  in w1_reg_a16_v16_write()
159 		w1_write_8(sl->master, reg & 0x00FF);  in w1_reg_a16_v16_write()
160 		w1_write_8(sl->master, reg>>8 & 0x00FF);  in w1_reg_a16_v16_write()
161 		w1_write_8(sl->master, val & 0x00FF);  in w1_reg_a16_v16_write()
162 		w1_write_8(sl->master, val>>8 & 0x00FF);  in w1_reg_a16_v16_write()
164 		ret = -ENODEV;  in w1_reg_a16_v16_write()
166 	mutex_unlock(&sl->master->bus_mutex);  in w1_reg_a16_v16_write()
191 					const struct regmap_config *config)  in regmap_get_w1_bus()  argument
193 	if (config->reg_bits == 8 && config->val_bits == 8)  in regmap_get_w1_bus()
196 	if (config->reg_bits == 8 && config->val_bits == 16)  in regmap_get_w1_bus()
199 	if (config->reg_bits == 16 && config->val_bits == 16)  in regmap_get_w1_bus()
202 	return ERR_PTR(-ENOTSUPP);  in regmap_get_w1_bus()
206 				 const struct regmap_config *config,  in __regmap_init_w1()  argument
211 	const struct regmap_bus *bus = regmap_get_w1_bus(w1_dev, config);  in __regmap_init_w1()
216 	return __regmap_init(w1_dev, bus, w1_dev, config,  in __regmap_init_w1()
222 				 const struct regmap_config *config,  in __devm_regmap_init_w1()  argument
227 	const struct regmap_bus *bus = regmap_get_w1_bus(w1_dev, config);  in __devm_regmap_init_w1()
232 	return __devm_regmap_init(w1_dev, bus, w1_dev, config,  in __devm_regmap_init_w1()
237 MODULE_DESCRIPTION("Register map access API - W1 (1-Wire) support");