diff options
| author | Xiubo Li <lixiubo@cmss.chinamobile.com> | 2015-12-03 08:27:21 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-12-08 20:05:50 +0300 |
| commit | 75fb0aaea18dbcde60a740c5d62af705366d6357 (patch) | |
| tree | ab86e339734d8aa1802ae938a6f859f506f771b4 /drivers/base/regmap/regmap-mmio.c | |
| parent | 9d98fa712920a393591f446fa76cb277309dd37b (diff) | |
| download | linux-75fb0aaea18dbcde60a740c5d62af705366d6357.tar.xz | |
regmap: mmio: Add regmap_mmio_get_min_stride
Splite the minimal stride parsing into one signal function.
Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base/regmap/regmap-mmio.c')
| -rw-r--r-- | drivers/base/regmap/regmap-mmio.c | 49 |
1 files changed, 30 insertions, 19 deletions
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c index dc991c3bec25..8812bfb9e3b8 100644 --- a/drivers/base/regmap/regmap-mmio.c +++ b/drivers/base/regmap/regmap-mmio.c @@ -61,6 +61,33 @@ static int regmap_mmio_regbits_check(size_t reg_bits) } } +static int regmap_mmio_get_min_stride(size_t val_bits) +{ + int min_stride; + + switch (val_bits) { + case 8: + /* The core treats 0 as 1 */ + min_stride = 0; + return 0; + case 16: + min_stride = 2; + break; + case 32: + min_stride = 4; + break; +#ifdef CONFIG_64BIT + case 64: + min_stride = 8; + break; +#endif + default: + return -EINVAL; + } + + return min_stride; +} + static inline void regmap_mmio_count_check(size_t count, u32 offset) { BUG_ON(count <= offset); @@ -231,25 +258,9 @@ static struct regmap_mmio_context *regmap_mmio_gen_context(struct device *dev, if (config->pad_bits) return ERR_PTR(-EINVAL); - switch (config->val_bits) { - case 8: - /* The core treats 0 as 1 */ - min_stride = 0; - break; - case 16: - min_stride = 2; - break; - case 32: - min_stride = 4; - break; -#ifdef CONFIG_64BIT - case 64: - min_stride = 8; - break; -#endif - default: - return ERR_PTR(-EINVAL); - } + min_stride = regmap_mmio_get_min_stride(config->val_bits); + if (min_stride < 0) + return ERR_PTR(min_stride); if (config->reg_stride < min_stride) return ERR_PTR(-EINVAL); |