Re: [PATCH v2 3/4] arm/dts: OMAP4: Add mmc controller nodes and board data

[Rajendra Nayak <rnayak@ti.com>]

On Friday 24 February 2012 03:46 PM, T Krishnamoorthy, Balaji wrote:
>> diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
>> index 29f4589..9204f60 100644
>> --- a/arch/arm/boot/dts/omap4.dtsi
>> +++ b/arch/arm/boot/dts/omap4.dtsi
>> @@ -25,6 +25,11 @@
>>                 serial1 =&uart2;
>>                 serial2 =&uart3;
>>                 serial3 =&uart4;
>> +               mmc1 =&mmc1;
>> +               mmc2 =&mmc2;
>> +               mmc3 =&mmc3;
>> +               mmc4 =&mmc4;
>> +               mmc5 =&mmc5;
>>         };
>>
>>         cpus {
>> @@ -155,5 +160,31 @@
>>                         #size-cells =<0>;
>>                         ti,hwmods = "i2c4";
>>                 };
>> +
>> +               mmc1: mmc@1 {
>> +                       compatible = "ti,omap4-hsmmc";
>> +                       ti,hwmods = "mmc1";
>> +                       ti,dual-volt;
>> +               };
>> +
>> +               mmc2: mmc@2 {
>> +                       compatible = "ti,omap4-hsmmc";
>> +                       ti,hwmods = "mmc2";
>> +               };
>
> Hi Rajendra,
> Is there a way to control the device registration order,
> eMMC connected to mmc2 needs to be registered as /dev/mmcblk0p ...
> irrespective of whether SD card is mount or not on mmc1 card slot.
> So that bootargs would not have to be modified when filesystem is on eMMC.

I don't know if we can, but even if we could, we take care of the same
bootargs working on two boards (say sdp and panda) *if* on sdp I have my
filesystem on eMMC and on panda I have it on external card.
What happens if I want to use my filesystem on both boards on external
card?

>
>> +
>> +               mmc3: mmc@3 {
>> +                       compatible = "ti,omap4-hsmmc";
>> +                       ti,hwmods = "mmc3";
>> +               };
>> +
>> +               mmc4: mmc@4 {
>> +                       compatible = "ti,omap4-hsmmc";
>> +                       ti,hwmods = "mmc4";
>> +               };
>> +
>> +               mmc5: mmc@5 {
>> +                       compatible = "ti,omap4-hsmmc";
>> +                       ti,hwmods = "mmc5";
>> +               };
>>         };
>>   };
>> --
>> 1.7.1
>>