diff options
Diffstat (limited to 'sound/soc/codecs/rl6231.c')
| -rw-r--r-- | sound/soc/codecs/rl6231.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sound/soc/codecs/rl6231.c b/sound/soc/codecs/rl6231.c index 96f3e906dfef..57e51c16e021 100644 --- a/sound/soc/codecs/rl6231.c +++ b/sound/soc/codecs/rl6231.c @@ -11,10 +11,57 @@ */ #include <linux/module.h> +#include <linux/regmap.h> #include "rl6231.h" /** + * rl6231_get_pre_div - Return the value of pre divider. + * + * @map: map for setting. + * @reg: register. + * @sft: shift. + * + * Return the value of pre divider from given register value. + * Return negative error code for unexpected register value. + */ +int rl6231_get_pre_div(struct regmap *map, unsigned int reg, int sft) +{ + int pd, val; + + regmap_read(map, reg, &val); + + val = (val >> sft) & 0x7; + + switch (val) { + case 0: + case 1: + case 2: + case 3: + pd = val + 1; + break; + case 4: + pd = 6; + break; + case 5: + pd = 8; + break; + case 6: + pd = 12; + break; + case 7: + pd = 16; + break; + default: + pd = -EINVAL; + break; + } + + return pd; +} +EXPORT_SYMBOL_GPL(rl6231_get_pre_div); + +/** * rl6231_calc_dmic_clk - Calculate the parameter of dmic. * * @rate: base clock rate. |