Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753211AbaLAK5A (ORCPT ); Mon, 1 Dec 2014 05:57:00 -0500 Received: from h1.radempa.de ([176.9.142.194]:59051 "EHLO mail.cosmopool.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752758AbaLAK46 (ORCPT ); Mon, 1 Dec 2014 05:56:58 -0500 X-Greylist: delayed 418 seconds by postgrey-1.27 at vger.kernel.org; Mon, 01 Dec 2014 05:56:57 EST From: Harald Geyer To: Richard Weinberger cc: linus.walleij@linaro.org, linux-gpio@vger.kernel.org, javier.martinez@collabora.co.uk, acourbot@nvidia.com, swarren@nvidia.com, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, linux-iio@vger.kernel.org, "linux-kernel@vger.kernel.org" , Harald Geyer Subject: Re: iio: dht11 broken In-reply-to: <547B4464.9090300@nod.at> References: <547B4464.9090300@nod.at> Comments: In-reply-to Richard Weinberger message dated "Sun, 30 Nov 2014 17:23:00 +0100." MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <4120.1417430951.1@stardust.g4.wien.funkfeuer.at> Date: Mon, 01 Dec 2014 11:49:32 +0100 Message-Id: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Richard! Richard Weinberger writes: > Staring with 3.12 gpiolib refuses to set an GPIO used as IRQ into output mode. > see commit d468bf9e (gpio: add API to be strict about GPIO IRQ usage) > The dht driver does this and is therefore not functional. > As the dht11 driver got merged in 3.13 there is a high chance that it > never worked. Well, I'm developing on mxs and there it works on 3.13 and 3.14 at least. (I have it in production using 3.14.18 ATM.) > Harald, are you aware of this issue? I got one report about this issue, but couldn't reproduce it yet and the reporter didn't agree to quoting his messages to kernel mailing lists, so this has been rather low priority on my todo list. Next plan is to see if I can reproduce the issue on sunxi (A10). However anybody able to reproduce this and willing to test patches, would of course push this up on my todo list. Any input from gpiolib people about what the proper fix would be in their opinion, of course is appreciated. I don't think the dht11 driver is doing anything unreasonable per se, so maybe they can clarify how the API is intended to be used? Harald -- 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/