linux-kernel - Re: [PATCH V4 3/3] soc/tegra: pmc: Add support for IO pads power state and voltage

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Date:	Wed, 11 May 2016 20:59:08 +0100
From:	Jon Hunter <jonathanh@...dia.com>
To:	Laxman Dewangan <ldewangan@...dia.com>, <thierry.reding@...il.com>,
	<airlied@...ux.ie>, <swarren@...dotorg.org>, <gnurou@...il.com>
CC:	<dri-devel@...ts.freedesktop.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 3/3] soc/tegra: pmc: Add support for IO pads power
 state and voltage


On 11/05/16 18:22, Laxman Dewangan wrote:
> 
> On Wednesday 11 May 2016 09:05 PM, Jon Hunter wrote:
>> On 11/05/16 14:28, Laxman Dewangan wrote:
>>> On Sunday 08 May 2016 05:43 PM, Jon Hunter wrote:
>>>> On 06/05/16 16:32, Laxman Dewangan wrote:
>>>>> On Friday 06 May 2016 08:07 PM, Jon Hunter wrote:
>>>>>> On 06/05/16 11:45, Laxman Dewangan wrote:
>>>>>> +
>>>>>> +    /* Last entry */
>>>>>> +    TEGRA_IO_PAD_MAX,
>>>>>> Nit should these be TEGRA_IO_PADS_xxx?
>>>>> Because this was name of single pad and hence I said TEGRA_IO_PAD_XXX.
>>>> Aren't these used to set the voltage level and power state for the
>>>> entire group of IOs? Confused :-(
>>> One IO pad can have multiple IO pins.
>>> IO Pad control the power state and voltage of all pins belongs to that
>>> IO pad.
>> Ugh ... I remember for xusb there was something similar we the Tegra
>> docs used pad to imply multiple. However, in general pad == pin == ball
>> or at least should.
> 
> when we say sddmc3 IO pads, we deal with all signal pins of sdmm3.

Right but now you are saying io-pads and not io-pad. Yes io-pads would
mean more than one, but IMO io-pad implies singular. Anyway, enough
bike-shedding ...

Jon