linux-kernel - Re: [PATCH 2/2] usb: gadget: udc: atmel: convert to use GPIO descriptors

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Message-ID: <20180207164315.GJ2580@rfolt0960.corp.atmel.com>
Date:   Wed, 7 Feb 2018 17:43:15 +0100
From:   Ludovic Desroches <ludovic.desroches@...rochip.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     Ludovic Desroches <ludovic.desroches@...rochip.com>,
        <linux-usb@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Felipe Balbi <balbi@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] usb: gadget: udc: atmel: convert to use GPIO
 descriptors

On Wed, Feb 07, 2018 at 02:55:35PM +0100, Linus Walleij wrote:
> On Thu, Feb 1, 2018 at 10:34 AM, Ludovic Desroches
> <ludovic.desroches@...rochip.com> wrote:
> 
> > Use GPIO descriptors instead of relying on the old method.
> > Include irq.h header since it is needed and was indirectly
> > included through of_gpio.h.
> >
> > Signed-off-by: Ludovic Desroches <ludovic.desroches@...rochip.com>
> 
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> 
> Thank you for doing gpiod conversions. Making the world
> a better place!

Thanks, I wish it would be so easy!

I will send a v2 because I have the same issue that the one pointed by
Andy about the gpiod conversion for the lcd driver.

- udc->vbus_pin = devm_gpiod_get_optional(&pdev->dev, "atmel,vbus", GPIOD_IN);
+ udc->vbus_pin = devm_gpiod_get(&pdev->dev, "atmel,vbus", GPIOD_IN);
+ if (IS_ERR(udc->vbus_pin))
+ 	udc->vbus_pin = NULL;

I am not sure if I should prefer devm_gpiod_get_optional or
devm_gpiod_get.

Regards

Ludovic