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Date:	Wed, 25 Nov 2015 22:16:32 -0700
From:	Joshua Henderson <joshua.henderson@...rochip.com>
To:	Rob Herring <robh@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, <linux-mips@...ux-mips.org>,
	Andrei Pistirica <andrei.pistirica@...rochip.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH 12/14] DEVICETREE: Add bindings for PIC32 SDHC host
 controller

Hi Rob,

On 11/22/2015 2:57 PM, Rob Herring wrote:
> On Fri, Nov 20, 2015 at 05:17:24PM -0700, Joshua Henderson wrote:
>> From: Andrei Pistirica <andrei.pistirica@...rochip.com>
>>
>> Document the devicetree bindings for the SDHC peripheral found on
>> Microchip PIC32 class devices.
>>
>> Signed-off-by: Andrei Pistirica <andrei.pistirica@...rochip.com>
>> Signed-off-by: Joshua Henderson <joshua.henderson@...rochip.com>
>> ---
>>  .../devicetree/bindings/mmc/sdhci-pic32.txt        |   24 ++++++++++++++++++++
>>  1 file changed, 24 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-pic32.txt
>>
>> diff --git a/Documentation/devicetree/bindings/mmc/sdhci-pic32.txt b/Documentation/devicetree/bindings/mmc/sdhci-pic32.txt
>> new file mode 100644
>> index 0000000..f16388c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mmc/sdhci-pic32.txt
>> @@ -0,0 +1,24 @@
>> +* Microchip PIC32 SDHCI Controller
>> +
>> +This file documents differences between the core properties in mmc.txt
>> +and the properties used by the sdhci-pic32 driver.
>> +
>> +Required properties:
>> +- compatible: Should be "microchip,pic32-sdhci"
>> +- reg: Should contain registers location and length
>> +- interrupts: Should contain interrupt
>> +- pinctrl: Should contain pinctrl for data and command lines
>> +
>> +Optional properties:
>> +- no-1-8-v: 1.8V voltage selection not supported
> 
> There's a standard property for this one.
> 

Correct.  This is indeed a standard property that should not be here.  There is currently discussion to avoid using this property anyway.

>> +- piomode: disable DMA support
> 
> Proably this one too IIRC.
> 

We will be dropping this.  There are other ways to accomplish the same thing outside of DT.

Josh


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