ASoC: ssm2602: Add support for CLKDIV2

The SSM260x chips have an internal MCLK /2 divider (bit D7 in register
R8). Add logic that allows for more MCLK values using this divider.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
Link: https://lore.kernel.org/r/20230414140203.707729-7-pan@semihalf.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/ssm2602.c b/sound/soc/codecs/ssm2602.c
index cbbe83b..00b6036 100644 (file)
--- a/sound/soc/codecs/ssm2602.c
+++ b/sound/soc/codecs/ssm2602.c
@@ -280,9 +280,12 @@ static inline int ssm2602_get_coeff(int mclk, int rate)
        int i;
 
        for (i = 0; i < ARRAY_SIZE(ssm2602_coeff_table); i++) {
-               if (ssm2602_coeff_table[i].rate == rate &&
-                       ssm2602_coeff_table[i].mclk == mclk)
-                       return ssm2602_coeff_table[i].srate;
+               if (ssm2602_coeff_table[i].rate == rate) {
+                       if (ssm2602_coeff_table[i].mclk == mclk)
+                               return ssm2602_coeff_table[i].srate;
+                       if (ssm2602_coeff_table[i].mclk == mclk / 2)
+                               return ssm2602_coeff_table[i].srate | SRATE_CORECLK_DIV2;
+               }
        }
        return -EINVAL;
 }
@@ -365,18 +368,24 @@ static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
                switch (freq) {
                case 12288000:
                case 18432000:
+               case 24576000:
+               case 36864000:
                        ssm2602->sysclk_constraints = &ssm2602_constraints_12288000;
                        break;
                case 11289600:
                case 16934400:
+               case 22579200:
+               case 33868800:
                        ssm2602->sysclk_constraints = &ssm2602_constraints_11289600;
                        break;
                case 12000000:
+               case 24000000:
                        ssm2602->sysclk_constraints = NULL;
                        break;
                default:
                        return -EINVAL;
                }
+
                ssm2602->sysclk = freq;
        } else {
                unsigned int mask;