Hi,
On Fri, Jul 02, 2010 at 22:42:26, Raffaele Recalcati wrote:
> From: Raffaele Recalcati <raffaele.recalc...@bticino.it>
>
> When McBSP peripheral gets the clock from an external pin,
> there are three possible chooses, MCBSP_CLKX, MCBSP_CLKR
> and MCBSP_CLKS.
> evm-dm365 uses MCBSP_CLKR, instead in bmx board I have a different
> hardware connection and I use MCBSP_CLKS, so I have added
> this possibility.
>
> This patch has been developed against the:
>
> http://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci.git
> git tree and has been tested on bmx board (similar to dm365 evm)
>
> Signed-off-by: Raffaele Recalcati <raffaele.recalc...@bticino.it>
> Signed-off-by: Davide Bonfanti <davide.bonfa...@bticino.it>
> ---
> arch/arm/mach-davinci/include/mach/asp.h | 15 +++++++++++++++
> sound/soc/davinci/davinci-i2s.c | 27 ++++++++++++++++++++++-----
> 2 files changed, 37 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-davinci/include/mach/asp.h
> b/arch/arm/mach-davinci/include/mach/asp.h
> index 834725f..0847d21 100644
> --- a/arch/arm/mach-davinci/include/mach/asp.h
> +++ b/arch/arm/mach-davinci/include/mach/asp.h
> @@ -153,6 +153,7 @@ struct davinci_mcbsp_dev {
[...]
>
> unsigned int fmt;
> int clk_div;
> + int clk_input_pin;
> };
>
> static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
> @@ -279,11 +280,26 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai
> *cpu_dai,
> DAVINCI_MCBSP_PCR_CLKRM;
> break;
> case SND_SOC_DAIFMT_CBM_CFS:
> - /* McBSP CLKR pin is the input for the Sample Rate Generator.
> - * McBSP FSR and FSX are driven by the Sample Rate Generator. */
> - pcr = DAVINCI_MCBSP_PCR_SCLKME |
> - DAVINCI_MCBSP_PCR_FSXM |
> - DAVINCI_MCBSP_PCR_FSRM;
> + pcr = DAVINCI_MCBSP_PCR_FSRM | DAVINCI_MCBSP_PCR_FSXM;
> + /*
> + * Selection of the clock input pin that is the
> + * input for the Sample Rate Generator.
> + * McBSP FSR and FSX are driven by the Sample Rate
> + * Generator.
> + */
> + switch (dev->clk_input_pin) {
> + case MCBSP_CLKS:
> + pcr |= DAVINCI_MCBSP_PCR_CLKXM |
> + DAVINCI_MCBSP_PCR_CLKRM;
> + break;
> + case MCBSP_CLKR:
> + pcr |= DAVINCI_MCBSP_PCR_SCLKME;
> + break;
> + default:
> + dev_err(&pdev->dev, "bad clk_input_pin\n");
The above line results on compilation error as pdev is not defined in this
function.
Regards,
Sudhakar
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