From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Subject: Re: [PATCH v2 07/12] ARM: imx6q: add config-on-boot gpios Date: Tue, 22 May 2012 06:20:16 +0200 Message-ID: <201205220620.17109.marex@denx.de> References: <1337592237-5090-1-git-send-email-richard.zhao@freescale.com> <201205220525.39660.marex@denx.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Shawn Guo Cc: Richard Zhao , linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, B29397-KZfg59tc24xl57MIdRCFDg@public.gmane.org, B20596-KZfg59tc24xl57MIdRCFDg@public.gmane.org, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, alexander.shishkin-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org, dong.aisheng-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org, linuxzsc-MeMPY/F8WlbQT0dZR+AlfA@public.gmane.org, Rob Herring , Grant Likely List-Id: devicetree@vger.kernel.org Dear Shawn Guo, > On 22 May 2012 11:25, Marek Vasut wrote: > > Dear Shawn Guo, > > > >> Apart from my comments below, we really need to know Rob and Grant's > >> opinion on this. > > > > Hm ... so why don't you actually write per-board driver ? :-) That'd > > handle every single board very well, you'd configure the GPIOs there, > > every single additional necessary thing that has to be configured would > > sink there too etc. > > I'm not completely sure about how the per-board driver looks like > exactly. Can you have some code demonstrating it? Well such per-board driver would handle the board-specific init, like configuring the hub GPIO (as Richard has to do so on mx6q) or flick some other GPIOs, configure registers etc. You can not depend on a bootloader to do such init for you, even though the bootloader should do it and should do it right. > > Regards, > Shawn Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html