linux-kernel - Re: [PATCH] spi/tegra: add devicetree support

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Message-ID: <BANLkTimi8n-yik5g=f2jhVQPZoKLuWKgHQ@mail.gmail.com>
Date:	Wed, 15 Jun 2011 13:29:11 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Stephen Warren <swarren@...dia.com>
Cc:	"spi-devel-general@...ts.sourceforge.net" 
	<spi-devel-general@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Erik Gilling <konkers@...roid.com>
Subject: Re: [PATCH] spi/tegra: add devicetree support

On Wed, Jun 15, 2011 at 1:25 PM, Stephen Warren <swarren@...dia.com> wrote:
> Grant Likely wrote at Wednesday, June 15, 2011 1:08 PM:
>> Allow the tegra spi driver to obtain populate the spi bus with devices
>
> Remote "obtain"?

heh, oops.

>
>> from the device tree.
>>
>> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
>> ---
>>  .../devicetree/bindings/spi/spi_nvidia.txt         |    5 +++++
>>  drivers/spi/spi-tegra.c                            |   12 ++++++++++++
>>  2 files changed, 17 insertions(+), 0 deletions(-)
>>  create mode 100644 Documentation/devicetree/bindings/spi/spi_nvidia.txt
>>
>> diff --git a/Documentation/devicetree/bindings/spi/spi_nvidia.txt b/Documentation/devicetree/bindings/spi/spi_nvidia.txt
>> new file mode 100644
>> index 0000000..bde450b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/spi_nvidia.txt
>> @@ -0,0 +1,5 @@
>> +NVIDIA Tegra 2 SPI device
>> +
>> +Required properties:
>> +- compatible : should be "nvidia,tegra250-spi".
>> +- gpios : should specify GPIOs used for chipselect.
>
> Are things like reg, interrupts, and other general stuff implicit?
> I notice that fsl-spi.txt does specify those, but spi_altera.txt
> and spi_oc_tiny.txt don't.

yeah, standard properties are pretty much implicit.  I don't bother
writing the words if there isn't much value to them.  I've been
contemplating a tool that will take DT documentation written in a
certain form, and automatically fill in standard properties as needed,
but that's a project for another day.

g.
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