diff options
author | Lucas Tanure <tanureal@opensource.cirrus.com> | 2021-10-21 10:27:21 -0300 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2021-10-23 19:55:03 +0100 |
commit | f231ff38b7b23197013b437128d196710fe282da (patch) | |
tree | adc6fc13a4204ea947f3c9df2c0b894d1ebfea72 /drivers/base/regmap | |
parent | 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f (diff) | |
download | linux-stable-f231ff38b7b23197013b437128d196710fe282da.tar.gz linux-stable-f231ff38b7b23197013b437128d196710fe282da.tar.bz2 linux-stable-f231ff38b7b23197013b437128d196710fe282da.zip |
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>
Diffstat (limited to 'drivers/base/regmap')
-rw-r--r-- | drivers/base/regmap/regmap-spi.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c index c1894e93c378..719323bc6c7f 100644 --- a/drivers/base/regmap/regmap-spi.c +++ b/drivers/base/regmap/regmap-spi.c @@ -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(®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); @@ -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, ®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); |