Subject: [PATCH 3/5] gpio/omap: Add DT support to GPIO driver

From: [email-masked] (Cousson, Benoit)
Date: Wed, 22 Feb 2012 15:31:19 +0100

On 2/22/2012 3:23 PM, Rob Herring wrote:
> On 02/15/2012 10:04 AM, Benoit Cousson wrote:
>> Adapt the GPIO driver to retrieve information from a DT file.
>>
>> Allocate the irq_base dynamically and rename bank->virtual_irq_start
>> to bank->irq_base.
>> Change irq_base type to int instead of u16 to match irq_alloc_descs
>> output.
>>
>> Add documentation for GPIO properties specific to OMAP.
>>
>> Signed-off-by: Benoit Cousson<[email-masked]>
>> Cc: Tarun Kanti DebBarma<[email-masked]>
>
> One comment below, but otherwise:
>
> Acked-by: Rob Herring<[email-masked]>
>
>> ---
>>   .../devicetree/bindings/gpio/gpio-omap.txt         |   30 +++++
>>   drivers/gpio/gpio-omap.c                           |  121 ++++++++++++++++++--
>>   2 files changed, 142 insertions(+), 9 deletions(-)
>>   create mode 100644 Documentation/devicetree/bindings/gpio/gpio-omap.txt
>>
>> diff --git a/Documentation/devicetree/bindings/gpio/gpio-omap.txt b/Documentation/devicetree/bindings/gpio/gpio-omap.txt
>> new file mode 100644
>> index 0000000..c1b3100
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/gpio/gpio-omap.txt
>> @@ -0,0 +1,30 @@
>> +OMAP GPIO controller bindings
>> +
>> +Required properties:
>> +- compatible:
>> +  - "ti,omap2-gpio" for OMAP2 controllers
>> +  - "ti,omap3-gpio" for OMAP3 controllers
>> +  - "ti,omap4-gpio" for OMAP4 controllers
>> +- #gpio-cells : Should be two.
>> +  - first cell is the pin number
>> +  - second cell is used to specify optional parameters (unused)
>> +- gpio-controller : Marks the device node as a GPIO controller.
>> +- #interrupt-cells : Should be one
>
> There's no level/edge settings for gpios?

That's a good question, because I was wondering as well :-)

I did no see how it was done in other GPIO implementation.

Benoit