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
---
Changes in v7: - Use map_physmem instead of ioremap, as it's more generic - Use plain readl & writel, not __raw_ variants
Changes in v6: None Changes in v5: None Changes in v4: - Tweak whitespace
Changes in v3: None Changes in v2: - New patch
drivers/core/regmap.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index 0299ff0..c68bcba 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; +}