linux-kernel - Re: [PATCH] gpio: Renesas R-Car GPIO driver V3

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Message-ID: <CANqRtoQWKSQYRJDryhMi793jRuODp5gSXY3d3O2CyuRG13eY6A@mail.gmail.com>
Date:	Thu, 28 Mar 2013 00:46:56 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-sh@...r.kernel.org,
	grant.likely@...retlab.ca, horms@...ge.net.au,
	laurent.pinchart@...asonboard.com
Subject: Re: [PATCH] gpio: Renesas R-Car GPIO driver V3

On Thu, Mar 28, 2013 at 12:16 AM, Linus Walleij
<linus.walleij@...aro.org> wrote:
> On Tue, Mar 26, 2013 at 1:23 AM, Magnus Damm <magnus.damm@...il.com> wrote:
>
>> From: Magnus Damm <damm@...nsource.se>
>>
>> This patch is V3 of a GPIO driver for the R-Car series of
>> SoCs from Renesas. This driver is designed to be reusable
>> between multiple SoCs that share the same basic building block,
>> but so far it has only been used on R-Car H1 (r8a7779).
>>
>> Each driver instance handles 32 GPIOs with individually
>> maskable IRQs. The driver operates on a single I/O memory
>> range and the 32 GPIOs are hooked up a single interrupt.
>>
>> In the case of R-Car H1 either external IRQ pins or GPIOs
>> with interrupts can be used for on-board interupts. For
>> external IRQs 4 pins are supported, and in the case of GPIO
>> there are 202 GPIOS as 202 interrupts hooked up via 6 driver
>> instances and to the GIC and the Cortex-A9 Quad.
>>
>> At this point this driver is interfacing as a regular
>> platform device driver. In the future DT support will be
>> submitted as an incremental feature patch.
>>
>> Signed-off-by: Magnus Damm <damm@...nsource.se>
>
> Gorgeous driver.
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Thanks! This particular GPIO hardware block hasn't been around for so
long so it's still not spoiled by special cases like the PFC or INTC
stuff.

Cheers,

/ magnus
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