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regmap: spi: Set regmap max raw r/w from max_transfer_size 

Set regmap raw read/write from spi max_transfer_size
so regmap_raw_read/write can split the access into chunks

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
[André: fix build warning]
Signed-off-by: André Almeida <andrealmeid@collabora.com>
Link: https://lore.kernel.org/r/20211021132721.13669-1-andrealmeid@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lucas Tanure 2021-10-21 10:27:21 -03:00 committed by Mark Brown
parent 6880fa6c56
commit f231ff38b7
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 32 additions and 4 deletions
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36
drivers/base/regmap/regmap-spi.c
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@ -109,13 +109,37 @@ static const struct regmap_bus regmap_spi = {
.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(&regmap_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 &regmap_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, &regmap_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);
@ -124,8 +148,12 @@ struct regmap *__devm_regmap_init_spi(struct spi_device *spi,
struct lock_class_key *lock_key,
const char *lock_name)
{
return __devm_regmap_init(&spi->dev, &regmap_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);