To aid PLL in locking on to a 32KHz MCLK, some register mods are made during PLL configuration, and when enabling the DAI, to achieve the full range of sample rates.
thanks for the patch series; we are about to test...
some comments below
Signed-off-by: Adam Thomson Adam.Thomson.Opensource@diasemi.com
sound/soc/codecs/da7213.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c index 79b8324..095fe40 100644 --- a/sound/soc/codecs/da7213.c +++ b/sound/soc/codecs/da7213.c @@ -750,11 +750,18 @@ static int da7213_dai_event(struct snd_soc_dapm_widget *w, snd_soc_update_bits(codec, DA7213_PC_COUNT, DA7213_PC_FREERUN_MASK, 0);
/* Slave mode, if SRM not enabled no need for status checks */
/* If SRM not enabled then nothing more to do */pll_ctrl = snd_soc_read(codec, DA7213_PLL_CTRL); if (!(pll_ctrl & DA7213_PLL_SRM_EN)) return 0;
/* Assist 32KHz mode PLL lock */if (pll_ctrl & DA7213_PLL_32K_MODE) {
these registers cannot not found in the datasheet; maybe add descriptive #defines in da7213.h
snd_soc_write(codec, 0xF0, 0x8B);snd_soc_write(codec, 0xF2, 0x03);snd_soc_write(codec, 0xF0, 0x00);}- /* Check SRM has locked */ do { pll_status = snd_soc_read(codec, DA7213_PLL_STATUS);
@@ -771,6 +778,14 @@ static int da7213_dai_event(struct snd_soc_dapm_widget *w,
return 0;case SND_SOC_DAPM_POST_PMD:
/* Revert 32KHz PLL lock udpates if applied previously */pll_ctrl = snd_soc_read(codec, DA7213_PLL_CTRL);if (pll_ctrl & DA7213_PLL_32K_MODE) {snd_soc_write(codec, 0xF0, 0x8B);snd_soc_write(codec, 0xF2, 0x01);snd_soc_write(codec, 0xF0, 0x00);}- /* PC free-running */ snd_soc_update_bits(codec, DA7213_PC_COUNT, DA7213_PC_FREERUN_MASK,
@@ -1428,6 +1443,14 @@ static int da7213_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, DA7213_PLL_INDIV_MASK | DA7213_PLL_MODE_MASK, pll_ctrl);
- /* Assist 32KHz mode PLL lock */
- if (source == DA7213_SYSCLK_PLL_32KHZ) {
snd_soc_write(codec, 0xF0, 0x8B);snd_soc_write(codec, 0xF1, 0x03);snd_soc_write(codec, 0xF1, 0x01);snd_soc_write(codec, 0xF0, 0x00);- }
- return 0;
}