linux-kernel - Re: [PATCH] ARM: tegra: roth: Add MMC pwrseq to power wifi on

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Date:	Wed, 8 Jul 2015 16:18:48 +0900
From:	Alexandre Courbot <gnurou@...il.com>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Alexandre Courbot <acourbot@...dia.com>,
	Javier Martinez Canillas <javier@...hile0.org>,
	Stephen Warren <swarren@...dotorg.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: tegra: roth: Add MMC pwrseq to power wifi on

Ping Thierry, is this patch good to be merged?

On Mon, Jun 8, 2015 at 5:12 PM, Javier Martinez Canillas
<javier@...hile0.org> wrote:
> Hello Alexandre,
>
> On Mon, Jun 8, 2015 at 9:41 AM, Alexandre Courbot <acourbot@...dia.com> wrote:
>> The wifi chip on roth needs to have its reset deasserted in order to be
>> probed. Add a mmc-pwrseq-simple to allow this to happen and get wifi
>> working at boot time.
>>
>> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
>> ---
>>  arch/arm/boot/dts/tegra114-roth.dts | 6 ++++++
>>  1 file changed, 6 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/tegra114-roth.dts b/arch/arm/boot/dts/tegra114-roth.dts
>> index ea1772a686c2..04762532a178 100644
>> --- a/arch/arm/boot/dts/tegra114-roth.dts
>> +++ b/arch/arm/boot/dts/tegra114-roth.dts
>> @@ -972,6 +972,11 @@
>>                 nvidia,invert-interrupt;
>>         };
>>
>> +       sdhci0_pwrseq: sdhci0_pwrseq {
>> +               compatible = "mmc-pwrseq-simple";
>> +               reset-gpios = <&gpio TEGRA_GPIO(CC, 5) GPIO_ACTIVE_LOW>;
>> +       };
>> +
>>         /* Wifi */
>>         sdhci@...00000 {
>>                 status = "okay";
>> @@ -979,6 +984,7 @@
>>                 broken-cd;
>>                 keep-power-in-suspend;
>>                 cap-sdio-irq;
>> +               mmc-pwrseq = <&sdhci0_pwrseq>;
>>         };
>>
>>         /* SD card */
>
> I'm neither familiar with this board nor have a schematic but the
> patch looks good to me.
>
> Reviewed-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
>
> Best regards,
> Javier
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