linux-kernel - Re: [PATCH] phy: exynos5-usbdrd: Add facility to toggle vbus gpio on/off

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Date:	Wed, 09 Apr 2014 14:11:34 +0200
From:	Sylwester Nawrocki <s.nawrocki@...sung.com>
To:	Vivek Gautam <gautam.vivek@...sung.com>, kishon@...com
Cc:	linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, gregkh@...uxfoundation.org,
	balbi@...com, kgene.kim@...sung.com, t.figa@...sung.com,
	k.debski@...sung.com, jg1.han@...sung.com
Subject: Re: [PATCH] phy: exynos5-usbdrd: Add facility to toggle vbus gpio
 on/off

Hi Vivek,

On 09/04/14 13:54, Vivek Gautam wrote:
> Adding support to enable/disable VBUS hooked to a gpio
> to enable vbus supply on the port.

Does the GPIO control a fixed voltage regulator ? If so, shouldn't
it be modelled by the regulator API instead ?

> Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
[...]
> +	/* Get required GPIO for vbus */
> +	phy_drd->gpio = of_get_named_gpio(dev->of_node,
> +					  "samsung,vbus-gpio", 0);
> +	if (!gpio_is_valid(phy_drd->gpio))
> +		dev_dbg(dev, "no usbdrd-phy vbus gpio defined\n");
> +
> +	if (devm_gpio_request(dev, phy_drd->gpio, "phydrd_vbus_gpio"))
> +		dev_dbg(dev, "can't request usbdrd-phy vbus gpio %d\n",
> +			phy_drd->gpio);

--
Regards,
Sylwester
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