diff options
| author | Adam Thomson <Adam.Thomson.Opensource@diasemi.com> | 2016-08-04 17:35:41 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-08-08 13:54:40 +0300 |
| commit | d936d527d241b606b0280034b3972b7825d3704c (patch) | |
| tree | 6cab9099c9346cdd10ec584831c73763a4d4e5dc /sound | |
| parent | 4c75225aa05753217a81ed10f136b86fb94c5922 (diff) | |
| download | linux-d936d527d241b606b0280034b3972b7825d3704c.tar.xz | |
ASoC: da7213: Improve 32KHz mode PLL locking
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.
Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/da7213.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c index 94550d4a4b9f..f756220a4f98 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) { + 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; } |