Drivers can configure it to adjust the final read/write location.
Signed-off-by: Pratyush Yadav p.yadav@ti.com Reviewed-by: Simon Glass sjg@chromium.org ---
Notes: No changes in v3.
drivers/core/regmap.c | 6 +++++- include/regmap.h | 6 ++++++ 2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index c71b961234..173ae80890 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -261,8 +261,10 @@ struct regmap *devm_regmap_init(struct udevice *dev, return ERR_PTR(rc);
map = *mapp; - if (config) + if (config) { map->width = config->width; + map->reg_offset_shift = config->reg_offset_shift; + }
devres_add(dev, mapp); return *mapp; @@ -349,6 +351,7 @@ int regmap_raw_read_range(struct regmap *map, uint range_num, uint offset, } range = &map->ranges[range_num];
+ offset <<= map->reg_offset_shift; if (offset + val_len > range->size) { debug("%s: offset/size combination invalid\n", __func__); return -ERANGE; @@ -458,6 +461,7 @@ int regmap_raw_write_range(struct regmap *map, uint range_num, uint offset, } range = &map->ranges[range_num];
+ offset <<= map->reg_offset_shift; if (offset + val_len > range->size) { debug("%s: offset/size combination invalid\n", __func__); return -ERANGE; diff --git a/include/regmap.h b/include/regmap.h index 19474e6de1..e6c59dfbce 100644 --- a/include/regmap.h +++ b/include/regmap.h @@ -82,9 +82,12 @@ struct regmap_bus; * * @width: Width of the read/write operations. Defaults to * REGMAP_SIZE_32 if set to 0. + * @reg_offset_shift Left shift the register offset by this value before + * performing read or write. */ struct regmap_config { enum regmap_size_t width; + u32 reg_offset_shift; };
/** @@ -92,12 +95,15 @@ struct regmap_config { * * @width: Width of the read/write operations. Defaults to * REGMAP_SIZE_32 if set to 0. + * @reg_offset_shift Left shift the register offset by this value before + * performing read or write. * @range_count: Number of ranges available within the map * @ranges: Array of ranges */ struct regmap { enum regmap_endianness_t endianness; enum regmap_size_t width; + u32 reg_offset_shift; int range_count; struct regmap_range ranges[0]; };