From patchwork Thu Sep 25 16:07:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Octavian Purdila X-Patchwork-Id: 393383 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id BCA3E1400DD for ; Fri, 26 Sep 2014 02:10:44 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753458AbaIYQKR (ORCPT ); Thu, 25 Sep 2014 12:10:17 -0400 Received: from mga14.intel.com ([192.55.52.115]:36518 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753930AbaIYQKN (ORCPT ); Thu, 25 Sep 2014 12:10:13 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP; 25 Sep 2014 08:58:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,598,1406617200"; d="scan'208";a="596818143" Received: from opurdila-mobl1.rb.intel.com ([10.237.104.117]) by fmsmga001.fm.intel.com with ESMTP; 25 Sep 2014 09:08:01 -0700 From: Octavian Purdila To: gregkh@linuxfoundation.org, linus.walleij@linaro.org, gnurou@gmail.com, wsa@the-dreams.de, sameo@linux.intel.com, lee.jones@linaro.org Cc: arnd@arndb.de, johan@kernel.org, daniel.baluta@intel.com, laurentiu.palcu@intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, Octavian Purdila Subject: [PATCH v6 3/4] gpiolib: add irq_not_threaded flag to gpio_chip Date: Thu, 25 Sep 2014 19:07:33 +0300 Message-Id: <1411661254-5204-4-git-send-email-octavian.purdila@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1411661254-5204-1-git-send-email-octavian.purdila@intel.com> References: <1411661254-5204-1-git-send-email-octavian.purdila@intel.com> Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Some GPIO chips (e.g. the DLN2 USB adapter) have blocking get/set operation but do not need a threaded irq handler. Signed-off-by: Octavian Purdila --- drivers/gpio/gpiolib.c | 2 +- include/linux/gpio/driver.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 15cc0bb..3fa7e73 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -447,7 +447,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_set_lockdep_class(irq, &gpiochip_irq_lock_class); irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler); /* Chips that can sleep need nested thread handlers */ - if (chip->can_sleep) + if (chip->can_sleep && !chip->irq_not_threaded) irq_set_nested_thread(irq, 1); #ifdef CONFIG_ARM set_irq_flags(irq, IRQF_VALID); diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index e78a237..44161ac 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -56,6 +56,8 @@ struct seq_file; * as the chip access may sleep when e.g. reading out the IRQ status * registers. * @exported: flags if the gpiochip is exported for use from sysfs. Private. + * @irq_not_threaded: flag must be set if @can_sleep is set but the + * IRQs don't need to be threaded * * A gpio_chip can help platforms abstract various sources of GPIOs so * they can all be accessed through a common programing interface. @@ -101,6 +103,7 @@ struct gpio_chip { struct gpio_desc *desc; const char *const *names; bool can_sleep; + bool irq_not_threaded; bool exported; #ifdef CONFIG_GPIOLIB_IRQCHIP