Re: IMX27: How to do 22k pull-up with the pinctrl ?

[Chris Ruehl <chris.ruehl-CR359r9tUDPXPF5Rlphj1Q@public.gmane.org>]

On Monday, November 11, 2013 08:03 PM, Mark Rutland wrote:
> On Mon, Nov 11, 2013 at 10:45:30AM +0000, Chris Ruehl wrote:
>> Hi,
>
> Hi,
>
> While this does involve device tree, it's not strictly a device tree
> problem, and the people best placed to answer your question don't seem
> to be on Cc. You'd get better responses if you used get_maintainer.pl,
> or looked at the commit history of the driver or binding to find people
> likely to be able to help.
>
> I've added Dong Aisheng, Shawn Guo, and Linus Walleij to Cc, as they had
> signed-off-bys on the binding document.
>
> Mark.

Dear Mark
Thanks.
I'm late with my answer, my data-center support change switches and forget to 
told the users about this.. I had no email for a while. Welcome to Hong Kong!


>
>>
>> while I port the static code to the DT I step into the problem to
>> set the PSCR for the sdhc2 ports to 22k pull-up
>> I look for something like described in
>>       pinctrl/fsl,imx-pinctrl.txt
>>
>> the fsl,imx27-pinctrl only say 0/1 dis/enable pull up but not the strength.
>>
>>
>> pinctrl_sdhc2_1: sdhc2-1 {
>>                           fsl,pins =<
>>                                   MX27_PAD_SD2_D0__SD2_D0  0x1
>>                                   MX27_PAD_SD2_D1__SD2_D1  0x1
>>                                   MX27_PAD_SD2_D2__SD2_D2  0x1
>>                                   MX27_PAD_SD2_D3__SD2_D3  0x1
>>                                   MX27_PAD_SD2_CLK__SD2_CLK  0x1
>>                                   MX27_PAD_SD2_CMD__SD2_CMD  0x1
>>                           >;
>>                   };
>>
>> its setup in board specific c-file
>>
>> /* 22k pull-up for sd2 pins  */
>>           reg = __raw_readw(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + MX27_SYS_PSCR));
>>           reg&= ~0xfff0;
>>           reg |= 0xfff0;
>>           __raw_writew(reg, MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + MX27_SYS_PSCR));
>>
>>
>> Any successions?
>>
>> Regards
>> Chris
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