On Mon, 2009-04-27 at 18:22 +0530, Azam Ansari wrote:
> Hi Steve,
>
> When I check /proc/pinmux it shows that Pinmux is configured for McBSP
> 29:34 but when I see the schematics it shows that McBSP pins are on
> 25:30. Can you please tell me how do i enable event mux for McBSP0 pin
> 25:30?
>
There is a pinmux layer that is used to manage pinmux settings. The
definitions are in In file, arch/arm/mach-davinci/mux_cfg.c. Please
take a look at davinci_dm355_pins. With MV kernel pinmux is setup
automatically when clk_enable is called. You can see the actual call to
setup pinmux in arch/arm/mach-davinci/board-dm355-evm.c function
dm355_setup_pinmux.
It seems the code is setting pinmux register 3 bits 0-5 as 1's
(following code segment comes from davinci_dm355_pins in
arch/arm/mach-davinci/mux_cfg.c.
...
MUX_CFG("MCBSP0_BDX", 3, 0, 1, 1, 0)
MUX_CFG("MCBSP0_X", 3, 1, 1, 1, 0)
MUX_CFG("MCBSP0_BFSX", 3, 2, 1, 1, 0)
MUX_CFG("MCBSP0_BDR", 3, 3, 1, 1, 0)
MUX_CFG("MCBSP0_R", 3, 4, 1, 1, 0)
MUX_CFG("MCBSP0_BFSR", 3, 5, 1, 1, 0)
...
It is not immediately obvious looking at the datasheet that "1" is the
correct setting. perhaps try setting to 0's and see if it works for
you.
...
MUX_CFG("MCBSP0_BDX", 3, 0, 1, 0, 0)
MUX_CFG("MCBSP0_X", 3, 1, 1, 0, 0)
MUX_CFG("MCBSP0_BFSX", 3, 2, 1, 0, 0)
MUX_CFG("MCBSP0_BDR", 3, 3, 1, 0, 0)
MUX_CFG("MCBSP0_R", 3, 4, 1, 0, 0)
MUX_CFG("MCBSP0_BFSR", 3, 5, 1, 0, 0)
...
If you have a scope to look at the clocks and data, it would be helpful
in debugging as well.
Regards,
Steve
>
>
> On Mon, Apr 27, 2009 at 5:18 PM, Steve Chen <sc...@mvista.com> wrote:
> On Mon, 2009-04-27 at 14:20 +0530, Azam Ansari wrote:
> > Hi,
> >
> > I have enabled McBSP0 in the board-dm355-evm.c file.
> > I have configure McBSP0 for audio but it is not
> working( Currently I
> > am using McBSP0 for only recording purpose...).
>
>
> May want to check the pinmux settings.. just a thought.
>
> Regards,
>
> Steve
>
>
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