From patchwork Thu Apr 24 06:57:39 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yegor Yefremov X-Patchwork-Id: 4045831 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DDF18BFF02 for ; Thu, 24 Apr 2014 06:58:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 049DB20279 for ; Thu, 24 Apr 2014 06:58:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08DFD2024F for ; Thu, 24 Apr 2014 06:58:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751976AbaDXG6I (ORCPT ); Thu, 24 Apr 2014 02:58:08 -0400 Received: from ns.visionsystems.de ([62.145.30.242]:42096 "EHLO mail.visionsystems.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751787AbaDXG6G (ORCPT ); Thu, 24 Apr 2014 02:58:06 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.visionsystems.de (Postfix) with ESMTP id 48B332E4116; Thu, 24 Apr 2014 08:58:05 +0200 (CEST) Received: from mail.visionsystems.de ([127.0.0.1]) by localhost (mail.visionsystems.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 04201-08; Thu, 24 Apr 2014 08:57:51 +0200 (CEST) Received: from visionsystems.de (kallisto.visionsystems.local [192.168.1.3]) by mail.visionsystems.de (Postfix) with ESMTP id 80AA72E4124; Thu, 24 Apr 2014 08:57:51 +0200 (CEST) Received: from development1.visionsystems.local ([192.168.1.36]) by visionsystems.de with Microsoft SMTPSVC(6.0.3790.4675); Thu, 24 Apr 2014 08:57:47 +0200 From: yegorslists@googlemail.com To: linux-gpio@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, tony@atomide.com, linus.walleij@linaro.org, Yegor Yefremov Subject: [PATCH v3] gpio: omap: implement get_direction Date: Thu, 24 Apr 2014 08:57:39 +0200 Message-Id: <1398322659-20008-1-git-send-email-yegorslists@googlemail.com> X-Mailer: git-send-email 1.7.7 X-OriginalArrivalTime: 24 Apr 2014 06:57:47.0796 (UTC) FILETIME=[80329D40:01CF5F8A] X-Virus-Scanned: amavisd-new at visionsystems.de Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Yegor Yefremov This patch implements gpio_chip's get_direction() routine, that lets other drivers get particular GPIOs direction using struct gpio_desc. Signed-off-by: Yegor Yefremov Acked-by: Javier Martinez Canillas Acked-by: Santosh Shilimkar Tested-by: Tony Lindgren Reviewed-by: Kevin Hilman --- Changes: v3: get rid of _get_gpio_direction() (Linus Walleij) v2: rework return value calculation drivers/gpio/gpio-omap.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 19b886c..62c12e4 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #define OFF_MODE 1 @@ -936,6 +937,21 @@ static inline void mpuio_init(struct gpio_bank *bank) /*---------------------------------------------------------------------*/ +static int gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank; + unsigned long flags; + void __iomem *reg; + int dir; + + bank = container_of(chip, struct gpio_bank, chip); + reg = bank->base + bank->regs->direction; + spin_lock_irqsave(&bank->lock, flags); + dir = !!(readl_relaxed(reg) & BIT(offset)); + spin_unlock_irqrestore(&bank->lock, flags); + return dir; +} + static int gpio_input(struct gpio_chip *chip, unsigned offset) { struct gpio_bank *bank; @@ -1092,6 +1108,7 @@ static void omap_gpio_chip_init(struct gpio_bank *bank) */ bank->chip.request = omap_gpio_request; bank->chip.free = omap_gpio_free; + bank->chip.get_direction = gpio_get_direction; bank->chip.direction_input = gpio_input; bank->chip.get = gpio_get; bank->chip.direction_output = gpio_output;