From patchwork Wed Apr 29 13:59:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shobhit Kumar X-Patchwork-Id: 466061 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 412C814032C for ; Thu, 30 Apr 2015 00:00:45 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423148AbbD2OA2 (ORCPT ); Wed, 29 Apr 2015 10:00:28 -0400 Received: from mga11.intel.com ([192.55.52.93]:31178 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423147AbbD2OAZ (ORCPT ); Wed, 29 Apr 2015 10:00:25 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 29 Apr 2015 07:00:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,671,1422950400"; d="scan'208";a="717790896" Received: from sanandax-mobl.iind.intel.com (HELO skumar40-ivm.gar.corp.intel.com) ([10.223.178.100]) by fmsmga002.fm.intel.com with ESMTP; 29 Apr 2015 07:00:15 -0700 From: Shobhit Kumar To: intel-gfx , linux-kernel , linux-gpio , linux-pwm , dri-devel Cc: Linus Walleij , Alexandre Courbot , Daniel Vetter , David Airlie , Samuel Ortiz , Thierry Reding , Jani Nikula , Lee Jones , Povilas Staniulis , Chih-Wei Huang , Shobhit Kumar Subject: [PATCH 1/8] drivers/gpio/gpiolib: Add support for removing registered consumer lookup table Date: Wed, 29 Apr 2015 19:29:58 +0530 Message-Id: <1430316005-16480-2-git-send-email-shobhit.kumar@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1430316005-16480-1-git-send-email-shobhit.kumar@intel.com> References: <1430316005-16480-1-git-send-email-shobhit.kumar@intel.com> Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org In case we unload and load a driver module again that is registering a lookup table, without this it will result in multiple entries. Provide an option to remove the lookup table on driver unload v2: Ccing maintainers Cc: Samuel Ortiz Cc: Linus Walleij Cc: Alexandre Courbot Cc: Thierry Reding Reviewed-by: Alexandre Courbot Signed-off-by: Shobhit Kumar Reviewed-by: Linus Walleij --- drivers/gpio/gpiolib.c | 13 +++++++++++++ include/linux/gpio/machine.h | 1 + 2 files changed, 14 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 59eaa23..2420af9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1658,6 +1658,19 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table) mutex_unlock(&gpio_lookup_lock); } +/** + * gpiod_remove_lookup_table() - unregister GPIO device consumers + * @table: table of consumers to unregister + */ +void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) +{ + mutex_lock(&gpio_lookup_lock); + + list_del(&table->list); + + mutex_unlock(&gpio_lookup_lock); +} + static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, unsigned int idx, enum gpio_lookup_flags *flags) diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h index e270614..c0d712d 100644 --- a/include/linux/gpio/machine.h +++ b/include/linux/gpio/machine.h @@ -57,5 +57,6 @@ struct gpiod_lookup_table { } void gpiod_add_lookup_table(struct gpiod_lookup_table *table); +void gpiod_remove_lookup_table(struct gpiod_lookup_table *table); #endif /* __LINUX_GPIO_MACHINE_H */