ASoC: es8328: Use rounded rate for es8328_set_sysclk()

I have a board (RK3588 based) that sets the sysclk to 12287999. The
es8328 driver fails to match this to the 12288000 rate and fails to
load. Allow the rate comparison to work if the frequency is within
100hz by dividing it by 100 and rounding it, then multiplying it back
by 100.

Note the 100hz value was chosen arbitrarily by me, but it has only
been tested with a 1hz difference.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20231020171539.65513-1-macroalpha82@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/es8328.c b/sound/soc/codecs/es8328.c
index 97cfa0c8e81b7357cc6df7f0750ddea1f4d44c7f..f3c97da798dc8e4af72a90588a7f7995fd2e11e4 100644 (file)
--- a/sound/soc/codecs/es8328.c
+++ b/sound/soc/codecs/es8328.c
@@ -556,8 +556,15 @@ static int es8328_set_sysclk(struct snd_soc_dai *codec_dai,
        struct snd_soc_component *component = codec_dai->component;
        struct es8328_priv *es8328 = snd_soc_component_get_drvdata(component);
        int mclkdiv2 = 0;
+       unsigned int round_freq;
 
-       switch (freq) {
+       /*
+        * Allow a small tolerance for frequencies within 100hz. Note
+        * this value is chosen arbitrarily.
+        */
+       round_freq = DIV_ROUND_CLOSEST(freq, 100) * 100;
+
+       switch (round_freq) {
        case 0:
                es8328->sysclk_constraints = NULL;
                es8328->mclk_ratios = NULL;