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authorJohn Hsu <KCHSU0@nuvoton.com>2017-02-17 09:55:33 +0800
committerMark Brown <broonie@kernel.org>2017-02-17 10:42:53 +0000
commit1e561f6166bacb9c12d6fa1d23df07999674573e (patch)
treee0ef125cab7e74e8c8374376639f87cf72120d4f /sound
parent566cf877a1fcb6d6dc0126b076aad062054c2637 (diff)
ASoC: nau8825: automatic BCLK and LRC divde in master mode
configurable LRC and BCLK divide. The driver will make configurations of LRC and BCLK automatically according to BCLK and FS information in master mode. Signed-off-by: John Hsu <KCHSU0@nuvoton.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/nau8825.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index 4576f987a4a5..97fbeba9498f 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -1231,7 +1231,7 @@ static int nau8825_hw_params(struct snd_pcm_substream *substream,
{
struct snd_soc_codec *codec = dai->codec;
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
- unsigned int val_len = 0, osr;
+ unsigned int val_len = 0, osr, ctrl_val, bclk_fs, bclk_div;
nau8825_sema_acquire(nau8825, 3 * HZ);
@@ -1261,6 +1261,24 @@ static int nau8825_hw_params(struct snd_pcm_substream *substream,
osr_adc_sel[osr].clk_src << NAU8825_CLK_ADC_SRC_SFT);
}
+ /* make BCLK and LRC divde configuration if the codec as master. */
+ regmap_read(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2, &ctrl_val);
+ if (ctrl_val & NAU8825_I2S_MS_MASTER) {
+ /* get the bclk and fs ratio */
+ bclk_fs = snd_soc_params_to_bclk(params) / params_rate(params);
+ if (bclk_fs <= 32)
+ bclk_div = 2;
+ else if (bclk_fs <= 64)
+ bclk_div = 1;
+ else if (bclk_fs <= 128)
+ bclk_div = 0;
+ else
+ return -EINVAL;
+ regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
+ NAU8825_I2S_LRC_DIV_MASK | NAU8825_I2S_BLK_DIV_MASK,
+ ((bclk_div + 1) << NAU8825_I2S_LRC_DIV_SFT) | bclk_div);
+ }
+
switch (params_width(params)) {
case 16:
val_len |= NAU8825_I2S_DL_16;