From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753198AbaCLM75 (ORCPT ); Wed, 12 Mar 2014 08:59:57 -0400 Received: from mail-we0-f172.google.com ([74.125.82.172]:55428 "EHLO mail-we0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751843AbaCLM7z (ORCPT ); Wed, 12 Mar 2014 08:59:55 -0400 Message-ID: <53205A46.6000304@gmail.com> Date: Wed, 12 Mar 2014 13:59:50 +0100 From: Boris BREZILLON User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Jean-Jacques Hiblot , nicolas.ferre@atmel.com CC: plagnioj@jcrosoft.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, gregory.clement@free-electrons.com, devicetree@vger.kernel.org, thomas.petazzoni@free-electrons.com, alexandre.belloni@free-electrons.com Subject: Re: [PATCH v5 3/9] at91: pinctrl: don't request GPIOs used for interrupts but lock them as IRQ References: <1393841162-25339-1-git-send-email-jjhiblot@traphandler.com> <1393841162-25339-4-git-send-email-jjhiblot@traphandler.com> In-Reply-To: <1393841162-25339-4-git-send-email-jjhiblot@traphandler.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi JJ, IIRC this patch was necessary for the DM9000 device, which is not defined in this series anymore. And, correct me if I'm wrong, but there's still a discussion about how this should be fixed properly (https://lkml.org/lkml/2014/2/25/388). As a result, shouldn't we remove this patch from this series ? Best Regards, Boris Le 03/03/2014 11:05, Jean-Jacques Hiblot a écrit : > During the xlate stage of the DT interrupt parsing, the at91 pinctrl driver > requests the GPIOs that are described as interrupt sources. This prevents a > driver to request the gpio later to get its electrical value. > This patch replaces the gpio_request with a gpio_lock_as_irq to prevent the > gpio to be set as an ouput while allowing a subsequent gpio_request to succeed > > Signed-off-by: Jean-Jacques Hiblot > --- > drivers/pinctrl/pinctrl-at91.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c > index d990e33..db55b96 100644 > --- a/drivers/pinctrl/pinctrl-at91.c > +++ b/drivers/pinctrl/pinctrl-at91.c > @@ -1478,18 +1478,17 @@ static int at91_gpio_irq_domain_xlate(struct irq_domain *d, > { > struct at91_gpio_chip *at91_gpio = d->host_data; > int ret; > - int pin = at91_gpio->chip.base + intspec[0]; > > if (WARN_ON(intsize < 2)) > return -EINVAL; > *out_hwirq = intspec[0]; > *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; > > - ret = gpio_request(pin, ctrlr->full_name); > + ret = gpio_lock_as_irq(&at91_gpio->chip, intspec[0]); > if (ret) > return ret; > > - ret = gpio_direction_input(pin); > + ret = at91_gpio_direction_input(&at91_gpio->chip, intspec[0]); > if (ret) > return ret; >