diff options
| author | Xiubo Li <Li.Xiubo@freescale.com> | 2014-03-27 12:42:43 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-03-27 10:55:55 +0000 |
| commit | 932580409a9dacbf42215fa737bf06ae2c0aa624 (patch) | |
| tree | 58609e1ba0911aba76a70b7219ddfea92bdbb3fc | |
| parent | 41b0c2c976a8758a2b7f5b14cbc5d1a7436932cc (diff) | |
| download | linux-932580409a9dacbf42215fa737bf06ae2c0aa624.tar.gz | |
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>
| -rw-r--r-- | drivers/base/regmap/regmap-mmio.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c index 4f1efce94034e..ed080a47b1f8e 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_gather_write(void *context, 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 @@ static struct regmap_mmio_context *regmap_mmio_gen_context(struct device *dev, 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) |