linux-kernel - Re: [RESEND PATCH] ARM: dts: bcm28155-ap: Fix Card Detection GPIO

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Date:	Wed, 8 Jan 2014 16:28:04 -0800
From:	Tim Kryger <tim.kryger@...aro.org>
To:	Christian Daudt <bcm@...thebug.org>
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Broadcom Kernel Feedback List 
	<bcm-kernel-feedback-list@...adcom.com>,
	Device Tree List <devicetree@...r.kernel.org>,
	Linux Arm Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linaro Patches <patches@...aro.org>
Subject: Re: [RESEND PATCH] ARM: dts: bcm28155-ap: Fix Card Detection GPIO

On Wed, Jan 8, 2014 at 3:38 PM, Christian Daudt <bcm@...thebug.org> wrote:
> On Tue, Jan 7, 2014 at 10:53 AM, Tim Kryger <tim.kryger@...aro.org> wrote:
>> The board schematic states that the "SD_CARD_DET_N gets pulled to GND
>> when card is inserted" so the polarity has been updated to active low.
>>
>> Polarity is now specified with a GPIO define instead of a magic number.
>>
>> Signed-off-by: Tim Kryger <tim.kryger@...aro.org>
>> Reviewed-by: Matt Porter <matt.porter@...aro.org>
>> ---
>>  arch/arm/boot/dts/bcm28155-ap.dts | 4 +++-
>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boot/dts/bcm28155-ap.dts b/arch/arm/boot/dts/bcm28155-ap.dts
>> index 08e47c2..27dd110 100644
>> --- a/arch/arm/boot/dts/bcm28155-ap.dts
>> +++ b/arch/arm/boot/dts/bcm28155-ap.dts
>> @@ -13,6 +13,8 @@
>>
>>  /dts-v1/;
>>
>> +#include <dt-bindings/gpio/gpio.h>
>> +
>>  #include "bcm11351.dtsi"
>>
>>  / {
>> @@ -40,7 +42,7 @@
>>
>>         sdio4: sdio@...b0000 {
>>                 max-frequency = <48000000>;
>> -               cd-gpios = <&gpio 14 0>;
>> +               cd-gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
>>                 status = "okay";
>>         };
>>  };
>> --
>> 1.8.0.1
>>
> Tim,
>  Does bcm11351-brt not also suffer from the same bug? If it does can
> you pls update the patch to also fix it?
>
>  Thanks,
>    csd

The BRT and AP boards are similar so it may have the same problem but
I don't have a BRT and wouldn't be able to test any changes to its DTS
file.

-Tim
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