linux-kernel - RE: [Patch v1] AM35xx: Craneboard: Add USB EHCI support

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Date:	Mon, 22 Nov 2010 14:25:48 +0530
From:	"Srinath R" <srinath@...tralsolutions.com>
To:	"'Sergei Shtylyov'" <sshtylyov@...sta.com>
Cc:	<linux-omap@...r.kernel.org>, <nm@...com>,
	<linux@....linux.org.uk>, <umeshk@...tralsolutions.com>,
	<tony@...mide.com>, <nagendra@...tralsolutions.com>,
	<linux-kernel@...r.kernel.org>, <khilman@...prootsystems.com>,
	<jdk@...com>, <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [Patch v1] AM35xx: Craneboard: Add USB EHCI support

Hi Sergei,

Thanks for review, I will modify and resend patch.

With Regards
Srinath

-----Original Message-----
From: Sergei Shtylyov [mailto:sshtylyov@...sta.com] 
Sent: Saturday, November 20, 2010 5:09 PM
To: srinath@...tralsolutions.com
Cc: linux-omap@...r.kernel.org; nm@...com; linux@....linux.org.uk;
umeshk@...tralsolutions.com; tony@...mide.com;
nagendra@...tralsolutions.com; linux-kernel@...r.kernel.org;
khilman@...prootsystems.com; jdk@...com;
linux-arm-kernel@...ts.infradead.org
Subject: Re: [Patch v1] AM35xx: Craneboard: Add USB EHCI support

Hello.

On 19-11-2010 19:07, 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.

> Signed-off-by: Srinath<srinath@...tralsolutions.com>
> ---
>   arch/arm/mach-omap2/board-am3517crane.c |   21 +++++++++++++++++++++
>   1 files changed, 21 insertions(+), 0 deletions(-)

> diff --git a/arch/arm/mach-omap2/board-am3517crane.c
b/arch/arm/mach-omap2/board-am3517crane.c
> index 13ead33..0e1a806 100644
> --- a/arch/arm/mach-omap2/board-am3517crane.c
> +++ b/arch/arm/mach-omap2/board-am3517crane.c
[...]
> @@ -53,10 +55,29 @@ static void __init am3517_crane_init_irq(void)
>   	omap_gpio_init();
>   }
>
> +static struct ehci_hcd_omap_platform_data ehci_pdata __initdata = {
> +	.port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
> +	.port_mode[1] = EHCI_HCD_OMAP_MODE_UNKNOWN,
> +	.port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
> +
> +	.phy_reset  = true,
> +	.reset_gpio_port[0]  = 38,
> +	.reset_gpio_port[1]  = -EINVAL,
> +	.reset_gpio_port[2]  = -EINVAL
> +};
> +
>   static void __init am3517_crane_init(void)
>   {
>   	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
>   	omap_serial_init();
> +
> +	/* Configure GPIO for EHCI port */
> +	omap_mux_init_gpio(35, OMAP_PIN_OUTPUT);
> +	gpio_request(35, "usb_ehci_enable");
> +	gpio_direction_output(35, 1);
> +	gpio_set_value(35, 1);

    There's no need to call gpio_set_value(), as gpio_direction_output() has

already set the GPIO's value.

WBR, Sergei

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