Add the regmap_update_bits() to simply the read/modify/write of registers in a single command. The function is taken from Linux regmap implementation.
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com> --- include/regmap.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/regmap.h b/include/regmap.h index 493a5d8..3c463e9 100644 --- a/include/regmap.h +++ b/include/regmap.h @@ -47,6 +47,29 @@ int regmap_read(struct regmap *map, uint offset, uint *valp); regmap_read(map, (uint32_t *)(ptr)->member - (uint32_t *)(ptr), valp) /** + * regmap_update_bits() - Perform a read/modify/write using a mask + * + * @map: The map returned by regmap_init_mem*() + * @offset: Offset of the memory + * @mask: Mask to apply to the read value + * @val: Value to apply to the value to write + */ +static inline int regmap_update_bits(struct regmap *map, uint offset, + uint mask, uint val) +{ + uint reg; + int ret; + + ret = regmap_read(map, offset, ®); + if (ret) + return ret; + + reg &= ~mask; + + return regmap_write(map, offset, reg | val); +} + +/** * regmap_init_mem() - Set up a new register map that uses memory access * * Use regmap_uninit() to free it. -- 2.7.4 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot