Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753093Ab3ISINx (ORCPT ); Thu, 19 Sep 2013 04:13:53 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:46330 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751737Ab3ISINu (ORCPT ); Thu, 19 Sep 2013 04:13:50 -0400 Message-ID: <523AB235.1000808@ti.com> Date: Thu, 19 Sep 2013 13:43:41 +0530 From: George Cherian User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: CC: Laurent Pinchart , Linus Walleij , Laurent Pinchart , Kuninori Morimoto , "linux-gpio@vger.kernel.org" , Linux Kernel Mailing List , Linux OMAP Mailing List Subject: Re: PCF857x and 16-bit GPIO expanders References: <20130917190732.GD15645@radagast> <2356541.62QktiIBr5@avalon> <20130918173636.GT21559@radagast> In-Reply-To: <20130918173636.GT21559@radagast> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1411 Lines: 35 On 9/18/2013 11:06 PM, Felipe Balbi wrote: > Hi, > > On Wed, Sep 18, 2013 at 07:18:04PM +0200, Laurent Pinchart wrote: >> 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. > alright, that'd help me a lot :-) Just want to make sure if we're having > a board issue, or PCF8575 is a bit screwy ;-) Is it on dra7x-evm if so which pcf device (i2c address)? The pins i were interested were only 1 and 2 I never tried pin 15. Just tried toggling through sysfs and it works for me. > > Thanks > -- -George -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/