regmap: mmio: Add support for 1/2/8 bytes wide register address.
Since regmap core and mmio have already support for 1/2/8 bytes wide values,
so adds support for 1/2/8 bytes wide registers address.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c
index 4f1efce..ed080a4 100644
--- a/drivers/base/regmap/regmap-mmio.c
+++ b/drivers/base/regmap/regmap-mmio.c
@@ -26,18 +26,30 @@
struct regmap_mmio_context {
void __iomem *regs;
+ unsigned reg_bytes;
unsigned val_bytes;
+ unsigned pad_bytes;
struct clk *clk;
};
static inline void regmap_mmio_regsize_check(size_t reg_size)
{
- BUG_ON(reg_size != 4);
+ switch (reg_size) {
+ case 1:
+ case 2:
+ case 4:
+#ifdef CONFIG_64BIT
+ case 8:
+#endif
+ break;
+ default:
+ BUG();
+ }
}
static inline void regmap_mmio_count_check(size_t count)
{
- BUG_ON(count < 4);
+ BUG_ON(count % 2 != 0);
}
static int regmap_mmio_gather_write(void *context,
@@ -91,9 +103,13 @@
static int regmap_mmio_write(void *context, const void *data, size_t count)
{
+ struct regmap_mmio_context *ctx = context;
+ u32 offset = ctx->reg_bytes + ctx->pad_bytes;
+
regmap_mmio_count_check(count);
- return regmap_mmio_gather_write(context, data, 4, data + 4, count - 4);
+ return regmap_mmio_gather_write(context, data, ctx->reg_bytes,
+ data + offset, count - offset);
}
static int regmap_mmio_read(void *context,
@@ -219,6 +235,8 @@
ctx->regs = regs;
ctx->val_bytes = config->val_bits / 8;
+ ctx->reg_bytes = config->reg_bits / 8;
+ ctx->pad_bytes = config->pad_bits / 8;
ctx->clk = ERR_PTR(-ENODEV);
if (clk_id == NULL)