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

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Date:	Wed, 27 Mar 2013 16:16:41 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Magnus Damm <magnus.damm@...il.com>
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 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>

Yours,
Linus Walleij
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