From patchwork Thu Feb 12 14:24:42 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 439221 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id E02CE1400EA for ; Fri, 13 Feb 2015 01:28:28 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YLuif-0004ML-Vx; Thu, 12 Feb 2015 14:26:17 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YLuhy-0003wm-8m for linux-arm-kernel@lists.infradead.org; Thu, 12 Feb 2015 14:25:36 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1YLuhH-0005Eo-4d; Thu, 12 Feb 2015 15:24:51 +0100 Received: from ukl by dude.hi.pengutronix.de with local (Exim 4.84) (envelope-from ) id 1YLuhG-00053e-Ak; Thu, 12 Feb 2015 15:24:50 +0100 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= To: linux-serial@vger.kernel.org, Greg Kroah-Hartman Subject: [PATCH 5/5] serial: mctrl-gpio: simplify init routine Date: Thu, 12 Feb 2015 15:24:42 +0100 Message-Id: <1423751082-15888-5-git-send-email-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1423751082-15888-1-git-send-email-u.kleine-koenig@pengutronix.de> References: <1423751082-15888-1-git-send-email-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150212_062534_535324_192E76FD X-CRM114-Status: GOOD ( 16.57 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: Alexandre Courbot , Janusz Uzycki , linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, Alexander Shiyan X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org Instead of ignoring errors returned by devm_gpiod_get_index use devm_gpiod_get_index_optional which results in slightly more strict error handling which is good. Also use the fourth parameter to devm_gpiod_get_index_optional to be able to drop the explicit direction setting. Signed-off-by: Uwe Kleine-König --- drivers/tty/serial/serial_mctrl_gpio.c | 29 +++++++++++------------------ 1 file changed, 11 insertions(+), 18 deletions(-) diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index c0381a09f12d..5027db7b5814 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -94,27 +94,20 @@ struct mctrl_gpios *mctrl_gpio_init(struct device *dev, unsigned int idx) return ERR_PTR(-ENOMEM); for (i = 0; i < UART_GPIO_MAX; i++) { - gpios->gpio[i] = devm_gpiod_get_index(dev, - mctrl_gpios_desc[i].name, - idx); - - /* - * The GPIOs are maybe not all filled, - * this is not an error. - */ - if (IS_ERR_OR_NULL(gpios->gpio[i])) - continue; + enum gpiod_flags flags; if (mctrl_gpios_desc[i].dir_out) - err = gpiod_direction_output(gpios->gpio[i], 0); + flags = GPIOD_OUT_LOW; else - err = gpiod_direction_input(gpios->gpio[i]); - if (err) { - dev_dbg(dev, "Unable to set direction for %s GPIO", - mctrl_gpios_desc[i].name); - devm_gpiod_put(dev, gpios->gpio[i]); - gpios->gpio[i] = NULL; - } + flags = GPIOD_IN; + + gpios->gpio[i] = + devm_gpiod_get_index_optional(dev, + mctrl_gpios_desc[i].name, + idx, flags); + + if (IS_ERR(gpios->gpio[i])) + return PTR_ERR(gpios->gpio[i]); } return gpios;