linux-kernel - Re: [PATCH v6 6/8] pinctrl: cygnus: add gpio/pinconf driver

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Date:	Tue, 10 Mar 2015 11:20:43 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Ray Jui <rjui@...adcom.com>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	Christian Daudt <bcm@...thebug.org>,
	Matt Porter <mporter@...aro.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, Paul Bolle <pebolle@...cali.nl>,
	Scott Branden <sbranden@...adcom.com>,
	Dmitry Torokhov <dtor@...gle.com>,
	Anatol Pomazau <anatol@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v6 6/8] pinctrl: cygnus: add gpio/pinconf driver

On Mon, Mar 9, 2015 at 9:45 PM, Ray Jui <rjui@...adcom.com> wrote:

> This adds the initial support of the Broadcom Cygnus GPIO/PINCONF driver
> that supports all 3 GPIO controllers on Cygnus including the ASIU GPIO
> controller, the chipCommonG GPIO controller, and the always-on GPIO
> controller. Basic PINCONF configurations such as bias pull up/down, and
> drive strength are also supported in this driver.
>
> Pins from the ASIU GPIO controller can be individually muxed to GPIO
> function, through interaction with the Cygnus IOMUX controller
>
> Signed-off-by: Ray Jui <rjui@...adcom.com>
> Reviewed-by: Scott Branden <sbranden@...adcom.com>
> Tested-by: Dmitry Torokhov <dtor@...omium.org>

Patch applied! But please look at this:

> +#include <linux/gpio.h>

Doesn't just #include <linux/gpio/driver.h> work?

> +static int __init cygnus_gpio_init(void)
> +{
> +       return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
> +}
> +arch_initcall_sync(cygnus_gpio_init);

arch_initcall_sync() is a bit brutal.

Can you please investigate if you can have this as a normal device_initcall()
utilizing deferred probe if necessary?

Follow-up patches accepted!

Yours,
Linus Walleij
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