From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Subject: Re: PCF857x and 16-bit GPIO expanders Date: Wed, 18 Sep 2013 19:18:04 +0200 Message-ID: <2356541.62QktiIBr5@avalon> References: <20130917190732.GD15645@radagast> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Linus Walleij Cc: Felipe Balbi , George Cherian , Laurent Pinchart , Kuninori Morimoto , "linux-gpio@vger.kernel.org" , Linux Kernel Mailing List , Linux OMAP Mailing List List-Id: linux-omap@vger.kernel.org On Wednesday 18 September 2013 13:16:27 Linus Walleij wrote: > On Tue, Sep 17, 2013 at 9:07 PM, Felipe Balbi wrote: > > has anyone ever successfully using gpio-pcf857x.c driver with 16-bit > > gpio expanders ? We're having some issues here where toggling the last > > gpio pin (gpio 15) on a PCF8575 device causes platform to hang and I > > can't come up with any explanation of why would it hang... > > Bouncing the question to George, Laurent and Kuninori... I've got a board with a PCF8575 chip, but it uses I/Os 8 to 14 only as far as I know. I can try toggling I/O 15, but that will need to wait until next week as I'm currently travelling without access to the hardware. -- Regards, Laurent Pinchart