linux-kernel - Re: Chipidea ULPI driver

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Message-ID: <20150910144349.GH8982@saruman.tx.rr.com>
Date:	Thu, 10 Sep 2015 09:43:49 -0500
From:	Felipe Balbi <balbi@...com>
To:	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>
CC:	Peter Chen <peter.chen@...escale.com>,
	"balbi@...com" <balbi@...com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Greg Kroah-Hartman (gregkh@...uxfoundation.org)" 
	<gregkh@...uxfoundation.org>, "kishon@...com" <kishon@...com>,
	Punnaiah Choudary Kalluri <punnaia@...inx.com>
Subject: Re: Chipidea ULPI driver

(break your lines at 80-characters)

On Thu, Sep 10, 2015 at 12:44:58PM +0000, Subbaraya Sundeep Bhatta wrote:
> Hi Peter,
> 
> We are using NOP transceiver driver for USB3320 ULPI PHY with ChipIdea
> controller.
> 
> Recently we found that one of the boards (zedboard) requires PHY
> register access to set VBUS.
> 
> Note that our local driver we had before migrating to ChipIdea driver
> calls otg_ulpi_create with flags  ULPI_OTG_DRVVBUS |
> ULPI_OTG_DRVVBUS_EXT so that VBUS is enabled at initialization.
> 
> Can you please let me know how to do this with ChipIdea case? I see
> the following solutions:
> 
> 1. Write ULPI driver for USB3320 similar to tusb1210.

this

> 2. Write ci_hdrc_zynq.c which does PHY access required for Zynq.

not this

-- 
balbi

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