linux-kernel - Re: [Patch v4] AM35xx: Craneboard: Add USB EHCI support

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Message-ID: <4D0B5B68.5040706@ru.mvista.com>
Date:	Fri, 17 Dec 2010 15:45:28 +0300
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	srinath@...tralsolutions.com
CC:	linux-omap@...r.kernel.org, jdk@...com, tony@...mide.com,
	linux-kernel@...r.kernel.org, linux@....linux.org.uk,
	linux-arm-kernel@...ts.infradead.org, khilman@...prootsystems.com,
	nm@...com, nagendra@...tralsolutions.com,
	umeshk@...tralsolutions.com, sshtylyov@...sta.com, manjugk@...com
Subject: Re: [Patch v4] AM35xx: Craneboard: Add USB EHCI support

Hello.

On 16-12-2010 18:25, srinath@...tralsolutions.com wrote:

> From: Srinath <srinath@...tralsolutions.com>

> AM3517/05 Craneboard has one EHCI interface on board using port1.

> GPIO35 is used as power enable.
> GPIO38 is used as port1 PHY reset.

> History:
> http://marc.info/?l=linux-omap&w=2&r=1&s=Craneboard%3A+Add+USB+EHCI+support&q=t

> Signed-off-by: Srinath <srinath@...tralsolutions.com>
> ---
>   arch/arm/mach-omap2/board-am3517crane.c |   53 +++++++++++++++++++++++++++++++
>   1 files changed, 53 insertions(+), 0 deletions(-)

> diff --git a/arch/arm/mach-omap2/board-am3517crane.c b/arch/arm/mach-omap2/board-am3517crane.c
> index 8ba4047..1a80175 100644
> --- a/arch/arm/mach-omap2/board-am3517crane.c
> +++ b/arch/arm/mach-omap2/board-am3517crane.c
[...]
> @@ -51,10 +58,56 @@ static void __init am3517_crane_init_irq(void)
[...]
>   static void __init am3517_crane_init(void)
>   {
> +	int ret;
> +
>   	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
>   	omap_serial_init();
> +
> +	/* Configure GPIO for EHCI port */
> +	if (omap_mux_init_gpio(GPIO_USB_NRESET, OMAP_PIN_OUTPUT)) {
> +		pr_err("Can not cofigure mux for GPIO_USB_NRESET %d\n",
> +			GPIO_USB_NRESET);
> +		return;
> +	}
> +
> +	if (omap_mux_init_gpio(GPIO_USB_POWER, OMAP_PIN_OUTPUT)) {
> +		pr_err("Can not cofigure mux for GPIO_USB_POWER %d\n",
> +

    Empty line not needed here...

> +			GPIO_USB_POWER);
> +		return;
> +	}
> +
> +	ret = gpio_request(GPIO_USB_POWER, "usb_ehci_enable");
> +	if (ret < 0) {
> +		pr_err("Cannot request GPIO %d\n", GPIO_USB_POWER);
> +		return;
> +	}
> +
> +	ret = gpio_direction_output(GPIO_USB_POWER, 1);
> +	if (ret < 0)
> +		goto err;
> +
> +

    Too  many empty lines here...

> +	usb_ehci_init(&ehci_pdata);
> +	return;
> +
> +err:

    There's no need for *goto* and label.

> +	gpio_free(GPIO_USB_POWER);
> +	pr_err("Unable to initialize EHCI power\n");
> +	return;
>   }

WBR, Sergei
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