From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kuninori Morimoto Date: Fri, 12 Sep 2014 07:27:15 +0000 Subject: Re: [periperi] How to set default GPIO pin ? Message-Id: <874mwdmh7z.wl%kuninori.morimoto.gx@gmail.com> List-Id: References: <8738cc0vx9.wl%kuninori.morimoto.gx@gmail.com> <2862746.g5u9pdpKDi@avalon> In-Reply-To: <2862746.g5u9pdpKDi@avalon> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Hi Laurent, Linus (Walleij) Thank you for your help > (Moving this thread to linux-sh and linux-arm and CC'ing Linus Walleij) > > On Sunday 31 August 2014 22:08:52 Kuninori Morimoto wrote: > > > > I know we can use "defalt" PFC settings on DT. > > But, how to use "defalt" GPIO pin settings on DT ? > > > > We would like to use GPIO 7-17 as Low output, > > and do nothing after boot. > > From a DT point of view I believe this is supposed to be done by specifying > the output-low or output-high properties in the pinctrl configuration node. > However, these properties are not supported by the PFC driver, and there's no > easy way for the PFC driver to configure GPIOs handled by a different driver > such as the gpio-rcar driver for instance. > > Linus, do you have any hindsight on how this should be implemented ? I'm happy if we can use this "defalt" GPIO on DT. Linus, we need your opinion Best regards --- Kuninori Morimoto