[U-Boot] [PATCH] ARM: dts: am335x: disable mmc3

[Jean-Jacques Hiblot]

On 17/05/2017 15:04, Tom Rini wrote:
> On Wed, May 17, 2017 at 01:55:56PM +0200, Jean-Jacques Hiblot wrote:
>
>> SDIO is not supported in u-boot, there is no point in enabling mmc3.
>>
>> Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
>> ---
>>
>> Tom,
>>
>> this will fix the problem youreported with commit b5511d6cb8dc601efc14b8cf60755
>> on am335x-evm. For the record, the problem is that the clock of mmc 3 is not
>> enbled by the arch code. With DM_MMC enabled, mmc3 gets probed and u-boot crashes
>> when mmc3's registers are accessed for the first time.
>>
>> Jean-Jacques
>>
>>
>>   arch/arm/dts/am335x-evm.dts | 4 +++-
>>   1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/dts/am335x-evm.dts b/arch/arm/dts/am335x-evm.dts
>> index a6f20af..e94fcad 100644
>> --- a/arch/arm/dts/am335x-evm.dts
>> +++ b/arch/arm/dts/am335x-evm.dts
>> @@ -721,12 +721,14 @@
>>   };
>>   
>>   &mmc3 {
>> +	/* disable MMC3 as SDIO is not supported in U-Boot */
>> +	status = "disabled";
>> +
>>   	/* these are on the crossbar and are outlined in the
>>   	   xbar-event-map element */
>>   	dmas = <&edma 12
>>   		&edma 13>;
>>   	dma-names = "tx", "rx";
>> -	status = "okay";
>>   	vmmc-supply = <&wlan_en_reg>;
>>   	bus-width = <4>;
>>   	pinctrl-names = "default";
> Please put this into arch/arm/dts/am335x-evm-u-boot.dtsi instead,
I tried and it doesn't work. The XXX-u-boot.dtsi being included at the 
beginning of the DTS, it cannot override the
'status = "okay"' present in am335x-evm.dts.

> thanks!
>