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regmap: mmio: Add regmap_mmio_regbits_check. 

Fix the support for 1/2/8 bytes wide register address checking.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
hifive-unleashed-5.1
Xiubo Li 2014-03-28 13:12:56 +08:00 committed by Mark Brown
parent 932580409a
commit 451485ba6b
1 changed files with 18 additions and 2 deletions
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20
drivers/base/regmap/regmap-mmio.c
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@ -47,6 +47,21 @@ static inline void regmap_mmio_regsize_check(size_t reg_size)
}
}
static int regmap_mmio_regbits_check(size_t reg_bits)
{
switch (reg_bits) {
case 8:
case 16:
case 32:
#ifdef CONFIG_64BIT
case 64:
#endif
return 0;
default:
return -EINVAL;
}
}
static inline void regmap_mmio_count_check(size_t count)
{
BUG_ON(count % 2 != 0);
@ -191,8 +206,9 @@ static struct regmap_mmio_context *regmap_mmio_gen_context(struct device *dev,
int min_stride;
int ret;
if (config->reg_bits != 32)
return ERR_PTR(-EINVAL);
ret = regmap_mmio_regbits_check(config->reg_bits);
if (ret)
return ERR_PTR(ret);
if (config->pad_bits)
return ERR_PTR(-EINVAL);