1 // SPDX-License-Identifier: GPL-2.0
3 // Register map access API - SPI support
10 #include <linux/spi/spi.h>
25 	regmap_async_complete_cb(&async->core, async->m.status);  in regmap_spi_complete()
31 	struct spi_device *spi = to_spi_device(dev);  in regmap_spi_write()  local
33 	return spi_write(spi, data, count);  in regmap_spi_write()
41 	struct spi_device *spi = to_spi_device(dev);  in regmap_spi_gather_write()  local
50 	return spi_sync(spi, &m);  in regmap_spi_gather_write()
62 	struct spi_device *spi = to_spi_device(dev);  in regmap_spi_async_write()  local
64 	async->t[0].tx_buf = reg;  in regmap_spi_async_write()
65 	async->t[0].len = reg_len;  in regmap_spi_async_write()
66 	async->t[1].tx_buf = val;  in regmap_spi_async_write()
67 	async->t[1].len = val_len;  in regmap_spi_async_write()
69 	spi_message_init(&async->m);  in regmap_spi_async_write()
70 	spi_message_add_tail(&async->t[0], &async->m);  in regmap_spi_async_write()
72 		spi_message_add_tail(&async->t[1], &async->m);  in regmap_spi_async_write()
74 	async->m.complete = regmap_spi_complete;  in regmap_spi_async_write()
75 	async->m.context = async;  in regmap_spi_async_write()
77 	return spi_async(spi, &async->m);  in regmap_spi_async_write()
88 	return &async_spi->core;  in regmap_spi_async_alloc()
96 	struct spi_device *spi = to_spi_device(dev);  in regmap_spi_read()  local
98 	return spi_write_then_read(spi, reg, reg_size, val, val_size);  in regmap_spi_read()
112 static const struct regmap_bus *regmap_get_spi_bus(struct spi_device *spi,  in regmap_get_spi_bus()  argument
115 	size_t max_size = spi_max_transfer_size(spi);  in regmap_get_spi_bus()
117 	struct regmap_bus *bus;  in regmap_get_spi_bus()  local
120 		bus = kmemdup(&regmap_spi, sizeof(*bus), GFP_KERNEL);  in regmap_get_spi_bus()
121 		if (!bus)  in regmap_get_spi_bus()
122 			return ERR_PTR(-ENOMEM);  in regmap_get_spi_bus()
124 		max_msg_size = spi_max_message_size(spi);  in regmap_get_spi_bus()
125 		reg_reserve_size = (config->reg_bits + config->pad_bits) / BITS_PER_BYTE;  in regmap_get_spi_bus()
127 			max_size -= reg_reserve_size;  in regmap_get_spi_bus()
129 		bus->free_on_exit = true;  in regmap_get_spi_bus()
130 		bus->max_raw_read = max_size;  in regmap_get_spi_bus()
131 		bus->max_raw_write = max_size;  in regmap_get_spi_bus()
133 		return bus;  in regmap_get_spi_bus()
139 struct regmap *__regmap_init_spi(struct spi_device *spi,  in __regmap_init_spi()  argument
144 	const struct regmap_bus *bus = regmap_get_spi_bus(spi, config);  in __regmap_init_spi()  local
146 	if (IS_ERR(bus))  in __regmap_init_spi()
147 		return ERR_CAST(bus);  in __regmap_init_spi()
149 	return __regmap_init(&spi->dev, bus, &spi->dev, config, lock_key, lock_name);  in __regmap_init_spi()
153 struct regmap *__devm_regmap_init_spi(struct spi_device *spi,  in __devm_regmap_init_spi()  argument
158 	const struct regmap_bus *bus = regmap_get_spi_bus(spi, config);  in __devm_regmap_init_spi()  local
160 	if (IS_ERR(bus))  in __devm_regmap_init_spi()
161 		return ERR_CAST(bus);  in __devm_regmap_init_spi()
163 	return __devm_regmap_init(&spi->dev, bus, &spi->dev, config, lock_key, lock_name);  in __devm_regmap_init_spi()
167 MODULE_DESCRIPTION("regmap SPI Module");