.val_format_endian_default = REGMAP_ENDIAN_BIG,
};
+static const struct regmap_bus *regmap_get_spi_bus(struct spi_device *spi,
+ const struct regmap_config *config)
+{
+ size_t max_size = spi_max_transfer_size(spi);
+ struct regmap_bus *bus;
+
+ if (max_size != SIZE_MAX) {
+ bus = kmemdup(®map_spi, sizeof(*bus), GFP_KERNEL);
+ if (!bus)
+ return ERR_PTR(-ENOMEM);
+
+ bus->free_on_exit = true;
+ bus->max_raw_read = max_size;
+ bus->max_raw_write = max_size;
+ return bus;
+ }
+
+ return ®map_spi;
+}
+
struct regmap *__regmap_init_spi(struct spi_device *spi,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name)
{
- return __regmap_init(&spi->dev, ®map_spi, &spi->dev, config,
- lock_key, lock_name);
+ const struct regmap_bus *bus = regmap_get_spi_bus(spi, config);
+
+ if (IS_ERR(bus))
+ return ERR_CAST(bus);
+
+ return __regmap_init(&spi->dev, bus, &spi->dev, config, lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__regmap_init_spi);
struct lock_class_key *lock_key,
const char *lock_name)
{
- return __devm_regmap_init(&spi->dev, ®map_spi, &spi->dev, config,
- lock_key, lock_name);
+ const struct regmap_bus *bus = regmap_get_spi_bus(spi, config);
+
+ if (IS_ERR(bus))
+ return ERR_CAST(bus);
+
+ return __devm_regmap_init(&spi->dev, bus, &spi->dev, config, lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__devm_regmap_init_spi);