On Fri, 24 Feb 2012 15:56:52 +0530, Rajendra Nayak <rnayak@xxxxxx> wrote:
> 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?
of_alias_get_id() may be able to help you here. It will extract the id
numbering from the /aliases node. That is the safe way to do global
enumeration of devices in the device tree (instead of 'cell-index' which
is strongly discouraged)
g.
>
> >
> >> +
> >> + 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
> >>
>
>
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--
Grant Likely, B.Sc, P.Eng.
Secret Lab Technologies,Ltd.
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