linux-kernel - Re: [PATCH 2/2] USB: ehci-s5p: Add to get interrupt from DT

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Message-ID: <50DB5B80.50801@mvista.com>
Date:	Wed, 26 Dec 2012 23:18:08 +0300
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Dongjin Kim <tobetter@...il.com>
CC:	linux-samsung-soc@...r.kernel.org,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] USB: ehci-s5p: Add to get interrupt from DT

Hello.

On 12/26/2012 09:42 PM, Dongjin Kim wrote:

> This patch support to get interrupt resource from device tree as well as
> platform device if ehci node is defined in device tree and it's irq is
> described.

> Signed-off-by: Dongjin Kim <tobetter@...il.com>
> ---
>  drivers/usb/host/ehci-s5p.c |    8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)

> diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
> index 319dcfa..0fc5e5e 100644
> --- a/drivers/usb/host/ehci-s5p.c
> +++ b/drivers/usb/host/ehci-s5p.c
> @@ -16,6 +16,7 @@
>  #include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/of_gpio.h>
> +#include <linux/of_irq.h>
>  #include <linux/platform_data/usb-ehci-s5p.h>
>  #include <plat/usb-phy.h>
>  
> @@ -156,7 +157,12 @@ static int s5p_ehci_probe(struct platform_device *pdev)
>  		goto fail_io;
>  	}
>  
> -	irq = platform_get_irq(pdev, 0);
> +	if (pdev->dev.of_node)
> +		irq = irq_of_parse_and_map(pdev->dev.of_node, 0);

   platform_get_irq() should still work for device tree based platform devices.
I don't see the point on the patch?

> +	else {
> +		irq = platform_get_irq(pdev, 0);
> +	}

   Hm, why {} out of the blue? Both arms of *if* are single-stratement.

> +

   No need for empty line here.

>  	if (!irq) {
>  		dev_err(&pdev->dev, "Failed to get IRQ\n");
>  		err = -ENODEV;

WBR, Sergei

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