diff options
| -rw-r--r-- | drivers/base/regmap/regmap.c | 54 |
1 files changed, 20 insertions, 34 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 055a9c3a3b12..bb4502a48be5 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -454,7 +454,7 @@ enum regmap_endian_type { REGMAP_ENDIAN_VAL, }; -static int of_regmap_get_endian(struct device *dev, +static int regmap_get_endian(struct device *dev, const struct regmap_bus *bus, const struct regmap_config *config, enum regmap_endian_type type, @@ -465,15 +465,7 @@ static int of_regmap_get_endian(struct device *dev, if (!endian || !config) return -EINVAL; - /* - * Firstly, try to parse the endianness from driver's config, - * this is to be compatible with the none DT or the old drivers. - * From the driver's config the endianness value maybe: - * REGMAP_ENDIAN_BIG, - * REGMAP_ENDIAN_LITTLE, - * REGMAP_ENDIAN_NATIVE, - * REGMAP_ENDIAN_DEFAULT. - */ + /* Retrieve the endianness specification from the regmap config */ switch (type) { case REGMAP_ENDIAN_REG: *endian = config->reg_format_endian; @@ -485,31 +477,17 @@ static int of_regmap_get_endian(struct device *dev, return -EINVAL; } - /* - * If the endianness parsed from driver config is - * REGMAP_ENDIAN_DEFAULT, that means maybe we are using the DT - * node to specify the endianness information. - */ + /* If the regmap config specified a non-default value, use that */ if (*endian != REGMAP_ENDIAN_DEFAULT) return 0; - /* - * Secondly, try to parse the endianness from DT node if the - * driver config does not specify it. - * From the DT node the endianness value maybe: - * REGMAP_ENDIAN_BIG, - * REGMAP_ENDIAN_LITTLE, - */ + /* Parse the device's DT node for an endianness specification */ switch (type) { case REGMAP_ENDIAN_VAL: 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 (*endian != REGMAP_ENDIAN_DEFAULT) - return 0; - break; case REGMAP_ENDIAN_REG: break; @@ -517,10 +495,11 @@ static int of_regmap_get_endian(struct device *dev, return -EINVAL; } - /* - * Finally, try to parse the endianness from regmap bus config - * if in device's DT node the endianness property is absent. - */ + /* If the endianness was specified in DT, use that */ + if (*endian != REGMAP_ENDIAN_DEFAULT) + return 0; + + /* Retrieve the endianness specification from the bus config */ switch (type) { case REGMAP_ENDIAN_REG: if (bus && bus->reg_format_endian_default) @@ -534,6 +513,13 @@ static int of_regmap_get_endian(struct device *dev, return -EINVAL; } + /* If the bus specified a non-default value, use that */ + if (*endian != REGMAP_ENDIAN_DEFAULT) + return 0; + + /* Use this if no other value was found */ + *endian = REGMAP_ENDIAN_BIG; + return 0; } @@ -640,13 +626,13 @@ struct regmap *regmap_init(struct device *dev, map->reg_read = _regmap_bus_read; } - ret = of_regmap_get_endian(dev, bus, config, REGMAP_ENDIAN_REG, - ®_endian); + ret = regmap_get_endian(dev, bus, config, REGMAP_ENDIAN_REG, + ®_endian); if (ret) return ERR_PTR(ret); - ret = of_regmap_get_endian(dev, bus, config, REGMAP_ENDIAN_VAL, - &val_endian); + ret = regmap_get_endian(dev, bus, config, REGMAP_ENDIAN_VAL, + &val_endian); if (ret) return ERR_PTR(ret); |