From patchwork Tue May 5 09:32:48 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shobhit Kumar X-Patchwork-Id: 467990 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 09309140777 for ; Tue, 5 May 2015 19:33:05 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031582AbbEEJdD (ORCPT ); Tue, 5 May 2015 05:33:03 -0400 Received: from mga14.intel.com ([192.55.52.115]:5996 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030978AbbEEJdB (ORCPT ); Tue, 5 May 2015 05:33:01 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP; 05 May 2015 02:32:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,372,1427785200"; d="scan'208";a="566442039" Received: from unknown (HELO skumar40-ivm.gar.corp.intel.com) ([10.106.9.24]) by orsmga003.jf.intel.com with ESMTP; 05 May 2015 02:32:53 -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] gpiolib: Add support for removing registered consumer lookup table Date: Tue, 5 May 2015 15:02:48 +0530 Message-Id: <1430818368-26790-1-git-send-email-shobhit.kumar@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1430316005-16480-2-git-send-email-shobhit.kumar@intel.com> References: <1430316005-16480-2-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 v3: Correct the subject line (Lee jones) Cc: Samuel Ortiz Cc: Linus Walleij Cc: Alexandre Courbot Cc: Thierry Reding Reviewed-by: Alexandre Courbot Signed-off-by: Shobhit Kumar --- 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 */