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author | Mark Brown <broonie@kernel.org> | 2014-09-29 23:49:42 +0400 |
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committer | Mark Brown <broonie@kernel.org> | 2014-09-29 23:49:42 +0400 |
commit | 45942c310da8eadc603e7d2332897909c1da4b70 (patch) | |
tree | 40ef6d2a4ac4d1a676d3c8e4b7a91460896bd7e2 /drivers/base/regmap | |
parent | 88507a2ba8b453a38b950f3ccb2cae6cc4d82e7a (diff) | |
parent | 6e64b6ccc1e46932768e3bb8974fc2e5589bca7a (diff) | |
download | linux-45942c310da8eadc603e7d2332897909c1da4b70.tar.xz |
Merge remote-tracking branch 'regmap/topic/dt-endian' into regmap-next
Diffstat (limited to 'drivers/base/regmap')
-rw-r--r-- | drivers/base/regmap/regmap-i2c.c | 2 | ||||
-rw-r--r-- | drivers/base/regmap/regmap-spi.c | 2 | ||||
-rw-r--r-- | drivers/base/regmap/regmap.c | 79 |
3 files changed, 72 insertions, 11 deletions
diff --git a/drivers/base/regmap/regmap-i2c.c b/drivers/base/regmap/regmap-i2c.c index ca193d1ef47c..053150a7f9f2 100644 --- a/drivers/base/regmap/regmap-i2c.c +++ b/drivers/base/regmap/regmap-i2c.c @@ -168,6 +168,8 @@ static struct regmap_bus regmap_i2c = { .write = regmap_i2c_write, .gather_write = regmap_i2c_gather_write, .read = regmap_i2c_read, + .reg_format_endian_default = REGMAP_ENDIAN_BIG, + .val_format_endian_default = REGMAP_ENDIAN_BIG, }; static const struct regmap_bus *regmap_get_i2c_bus(struct i2c_client *i2c, diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c index 0eb3097c0d76..53d1148e80a0 100644 --- a/drivers/base/regmap/regmap-spi.c +++ b/drivers/base/regmap/regmap-spi.c @@ -109,6 +109,8 @@ static struct regmap_bus regmap_spi = { .async_alloc = regmap_spi_async_alloc, .read = regmap_spi_read, .read_flag_mask = 0x80, + .reg_format_endian_default = REGMAP_ENDIAN_BIG, + .val_format_endian_default = REGMAP_ENDIAN_BIG, }; /** diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 3a785a4f4ff6..d2f8a818d200 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -15,6 +15,7 @@ #include <linux/export.h> #include <linux/mutex.h> #include <linux/err.h> +#include <linux/of.h> #include <linux/rbtree.h> #include <linux/sched.h> @@ -448,6 +449,71 @@ int regmap_attach_dev(struct device *dev, struct regmap *map, } EXPORT_SYMBOL_GPL(regmap_attach_dev); +static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus, + const struct regmap_config *config) +{ + enum regmap_endian endian; + + /* Retrieve the endianness specification from the regmap config */ + endian = config->reg_format_endian; + + /* If the regmap config specified a non-default value, use that */ + if (endian != REGMAP_ENDIAN_DEFAULT) + return endian; + + /* Retrieve the endianness specification from the bus config */ + if (bus && bus->reg_format_endian_default) + endian = bus->reg_format_endian_default; + + /* If the bus specified a non-default value, use that */ + if (endian != REGMAP_ENDIAN_DEFAULT) + return endian; + + /* Use this if no other value was found */ + return REGMAP_ENDIAN_BIG; +} + +static enum regmap_endian regmap_get_val_endian(struct device *dev, + const struct regmap_bus *bus, + const struct regmap_config *config) +{ + struct device_node *np; + enum regmap_endian endian; + + /* Retrieve the endianness specification from the regmap config */ + endian = config->val_format_endian; + + /* If the regmap config specified a non-default value, use that */ + if (endian != REGMAP_ENDIAN_DEFAULT) + return endian; + + /* If the dev and dev->of_node exist try to get endianness from DT */ + if (dev && dev->of_node) { + np = dev->of_node; + + /* Parse the device's DT node for an endianness specification */ + if (of_property_read_bool(np, "big-endian")) + endian = REGMAP_ENDIAN_BIG; + else if (of_property_read_bool(np, "little-endian")) + endian = REGMAP_ENDIAN_LITTLE; + + /* If the endianness was specified in DT, use that */ + if (endian != REGMAP_ENDIAN_DEFAULT) + return endian; + } + + /* Retrieve the endianness specification from the bus config */ + if (bus && bus->val_format_endian_default) + endian = bus->val_format_endian_default; + + /* If the bus specified a non-default value, use that */ + if (endian != REGMAP_ENDIAN_DEFAULT) + return endian; + + /* Use this if no other value was found */ + return REGMAP_ENDIAN_BIG; +} + /** * regmap_init(): Initialise register map * @@ -551,17 +617,8 @@ struct regmap *regmap_init(struct device *dev, map->reg_read = _regmap_bus_read; } - reg_endian = config->reg_format_endian; - if (reg_endian == REGMAP_ENDIAN_DEFAULT) - reg_endian = bus->reg_format_endian_default; - if (reg_endian == REGMAP_ENDIAN_DEFAULT) - reg_endian = REGMAP_ENDIAN_BIG; - - val_endian = config->val_format_endian; - if (val_endian == REGMAP_ENDIAN_DEFAULT) - val_endian = bus->val_format_endian_default; - if (val_endian == REGMAP_ENDIAN_DEFAULT) - val_endian = REGMAP_ENDIAN_BIG; + reg_endian = regmap_get_reg_endian(bus, config); + val_endian = regmap_get_val_endian(dev, bus, config); switch (config->reg_bits + map->reg_shift) { case 2: |