linux-kernel - RE: [PATCH v7 3/4] usb: dwc2: assert phy reset when waking up in rk3288 platform

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Date:   Mon, 5 Sep 2016 13:35:56 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Randy Li' <ayaka@...lik.info>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
CC:     "felipe.balbi@...ux.intel.com" <felipe.balbi@...ux.intel.com>,
        "John.Youn@...opsys.com" <John.Youn@...opsys.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "heiko@...ech.de" <heiko@...ech.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-rockchip@...ts.infradead.org" 
        <linux-rockchip@...ts.infradead.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "kishon@...com" <kishon@...com>,
        "randy.li@...k-chips.com" <randy.li@...k-chips.com>
Subject: RE: [PATCH v7 3/4] usb: dwc2: assert phy reset when waking up in
 rk3288 platform

From: Randy Li
> Sent: 03 September 2016 22:55
...
> +			if (of_device_is_compatible(np, "rockchip,rk3288-usb")
> +					&& (NULL != hsotg->phy->ops->reset))
> +				hsotg->phy->ops->reset(hsotg->phy);
> +

Is this the only place ops->reset() is called?
Probably much better to check it first.

			if (hsotg->phy->ops->reset
					&& of_device_is_compatible(np, "rockchip,rk3288-usb")
				hsotg->phy->ops->reset(hsotg->phy);

	David