diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-09-08 07:47:35 +0100 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-09-21 15:04:32 +0200 |
| commit | 3bfb8cb43b16aeac138dbdbc1311cd718bbc4066 (patch) | |
| tree | e8aa1bc25bce0b74c92ed45b265db51fbfe852d7 | |
| parent | 96cb57c5ea1905c05435b42ac378938971b83766 (diff) | |
dm: regmap: Implement simple regmap_read & regmap_write
The regmap_read & regmap_write functions were previously declared in
regmap.h but not implemented anywhere. The regmap implementation &
commit message of 6f98b7504f70 ("dm: Add support for register maps
(regmap)") indicate that only memory mapped accesses are supported for
now, so providing simple implementations of regmap_read & regmap_write
is trivial. The access size is presumed to be 4 bytes & endianness is
presumed native, which are the defaults for the regmap code in Linux.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/core/regmap.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index 0299ff0879..c68bcba54f 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -13,6 +13,8 @@ #include <mapmem.h> #include <regmap.h> +#include <asm/io.h> + DECLARE_GLOBAL_DATA_PTR; static struct regmap *regmap_alloc_count(int count) @@ -117,3 +119,21 @@ int regmap_uninit(struct regmap *map) return 0; } + +int regmap_read(struct regmap *map, uint offset, uint *valp) +{ + uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE); + + *valp = le32_to_cpu(readl(ptr)); + + return 0; +} + +int regmap_write(struct regmap *map, uint offset, uint val) +{ + uint32_t *ptr = map_physmem(map->base + offset, 4, MAP_NOCACHE); + + writel(cpu_to_le32(val), ptr); + + return 0; +} |