linux-kernel - Re: [PATCH 3/7] usb: phy: tegra: Get PHY mode using DT

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Date:	Tue, 19 Mar 2013 13:58:31 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Venu Byravarasu <vbyravarasu@...dia.com>
CC:	gregkh@...uxfoundation.org, stern@...land.harvard.edu,
	balbi@...com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 3/7] usb: phy: tegra: Get PHY mode using DT

On 03/18/2013 06:29 AM, Venu Byravarasu wrote:
> Added a new PHY mode to support OTG.
> Obtained Tegra USB PHY mode using DT property.

> diff --git a/drivers/usb/phy/tegra_usb_phy.c b/drivers/usb/phy/tegra_usb_phy.c

> @@ -713,6 +712,16 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
>  	else
>  		phy->is_ulpi_phy = true;
>  
> +	err = of_property_match_string(np, "dr_mode", "otg");
> +	if (err < 0) {
> +		err = of_property_match_string(np, "dr_mode", "gadget");
> +		if (err < 0)

The binding says the 3 legal values for this property are "host",
"peripheral", or "otg". This agrees with the usage in
Documentation/devicetree/bindings/usb/fsl-usb.txt and
drivers/usb/host/fsl-mph-dr-of.c. So, "gadget" is not something the code
should be checking for.

I'm sure I pointed this out before.
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