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dm: core: Add an implementation of regmap_init_mem_platdata()

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Add an implementation of this function which mirrors the functions of the
automatic device-tree implementation. This can be used with of-platdata to
create regmaps.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2016-07-04 11:58:22 -06:00
parent a951431e82
commit 1e6ca1a6ad
2 changed files with 30 additions and 3 deletions
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18
drivers/core/regmap.c
View file

@ -37,10 +37,24 @@ static struct regmap *regmap_alloc_count(int count)
}
#if CONFIG_IS_ENABLED(OF_PLATDATA)
int regmap_init_mem_platdata(struct udevice *dev, fdt32_t *reg, int size,
int regmap_init_mem_platdata(struct udevice *dev, u32 *reg, int count,
struct regmap **mapp)
{
/* TODO(sjg@chromium.org): Implement this when needed */
struct regmap_range *range;
struct regmap *map;
map = regmap_alloc_count(count);
if (!map)
return -ENOMEM;
map->base = *reg;
for (range = map->range; count > 0; reg += 2, range++, count--) {
range->start = *reg;
range->size = reg[1];
}
*mapp = map;
return 0;
}
#else

15
include/regmap.h
View file

@ -56,7 +56,20 @@ int regmap_read(struct regmap *map, uint offset, uint *valp);
*/
int regmap_init_mem(struct udevice *dev, struct regmap **mapp);
int regmap_init_mem_platdata(struct udevice *dev, fdt32_t *reg, int size,
/**
* regmap_init_mem_platdata() - Set up a new memory register map for of-platdata
*
* This creates a new regmap with a list of regions passed in, rather than
* using the device tree. It only supports 32-bit machines.
*
* Use regmap_uninit() to free it.
*
* @dev: Device that uses this map
* @reg: List of address, size pairs
* @count: Number of pairs (e.g. 1 if the regmap has a single entry)
* @mapp: Returns allocated map
*/
int regmap_init_mem_platdata(struct udevice *dev, u32 *reg, int count,
struct regmap **mapp);
/**