diff options
| author | Daniel Mack <zonque@gmail.com> | 2012-10-04 15:08:39 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-10-15 11:24:47 +0900 |
| commit | 4ed8c9b737b61030d7b6ac71294d698de85b5b7e (patch) | |
| tree | 6c2d6eef82ed9c4130a4a4560237d254aef3ad3a /sound/soc/davinci | |
| parent | 393a53cbcfab404d516544cd30650c7b104cd3d4 (diff) | |
| download | linux-4ed8c9b737b61030d7b6ac71294d698de85b5b7e.tar.bz2 | |
ASoC: McASP: add support for clock dividers
Add support for the internal clock dividers of the McASP driver.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci')
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 714e51e5be5b..9b1920e25564 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -199,6 +199,7 @@ #define ACLKXE BIT(5) #define TX_ASYNC BIT(6) #define ACLKXPOL BIT(7) +#define ACLKXDIV_MASK 0x1f /* * DAVINCI_MCASP_ACLKRCTL_REG Receive Clock Control Register Bits @@ -207,6 +208,7 @@ #define ACLKRE BIT(5) #define RX_ASYNC BIT(6) #define ACLKRPOL BIT(7) +#define ACLKRDIV_MASK 0x1f /* * DAVINCI_MCASP_AHCLKXCTL_REG - High Frequency Transmit Clock Control @@ -215,6 +217,7 @@ #define AHCLKXDIV(val) (val) #define AHCLKXPOL BIT(14) #define AHCLKXE BIT(15) +#define AHCLKXDIV_MASK 0xfff /* * DAVINCI_MCASP_AHCLKRCTL_REG - High Frequency Receive Clock Control @@ -223,6 +226,7 @@ #define AHCLKRDIV(val) (val) #define AHCLKRPOL BIT(14) #define AHCLKRE BIT(15) +#define AHCLKRDIV_MASK 0xfff /* * DAVINCI_MCASP_XRSRCTL_BASE_REG - Serializer Control Register Bits @@ -554,6 +558,32 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai, return 0; } +static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div) +{ + struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai); + + switch (div_id) { + case 0: /* MCLK divider */ + mcasp_mod_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, + AHCLKXDIV(div - 1), AHCLKXDIV_MASK); + mcasp_mod_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG, + AHCLKRDIV(div - 1), AHCLKRDIV_MASK); + break; + + case 1: /* BCLK divider */ + mcasp_mod_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG, + ACLKXDIV(div - 1), ACLKXDIV_MASK); + mcasp_mod_bits(dev->base + DAVINCI_MCASP_ACLKRCTL_REG, + ACLKRDIV(div - 1), ACLKRDIV_MASK); + break; + + default: + return -EINVAL; + } + + return 0; +} + static int davinci_config_channel_size(struct davinci_audio_dev *dev, int channel_size) { @@ -880,7 +910,7 @@ static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = { .trigger = davinci_mcasp_trigger, .hw_params = davinci_mcasp_hw_params, .set_fmt = davinci_mcasp_set_dai_fmt, - + .set_clkdiv = davinci_mcasp_set_clkdiv, }; #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \ |