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

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Message-ID: <4CE7B35F.6000704@ru.mvista.com>
Date:	Sat, 20 Nov 2010 14:39:11 +0300
From:	Sergei Shtylyov <sshtylyov@...sta.com>
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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