From patchwork Fri Mar 29 02:44:08 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 2363281 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) by patchwork1.kernel.org (Postfix) with ESMTP id EDA273FD40 for ; Fri, 29 Mar 2013 02:57:28 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [IPv6:::1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 61738B29; Fri, 29 Mar 2013 02:47:54 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTP id D606FE34 for ; Fri, 29 Mar 2013 02:47:44 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id BE0962017A for ; Fri, 29 Mar 2013 02:47:40 +0000 (UTC) Received: from ayumi.akashicho.tokyo.vergenet.net (p8120-ipbfp1001kobeminato.hyogo.ocn.ne.jp [118.10.137.120]) by kirsty.vergenet.net (Postfix) with ESMTP id 845AC2C6A82; Fri, 29 Mar 2013 13:46:00 +1100 (EST) Received: by ayumi.akashicho.tokyo.vergenet.net (Postfix, from userid 7100) id 2BAE8EDEA21; Fri, 29 Mar 2013 11:45:58 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Fri, 29 Mar 2013 11:44:08 +0900 Message-Id: <1364525119-31791-320-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1364525119-31791-1-git-send-email-horms+renesas@verge.net.au> References: <1364525119-31791-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-3.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RP_MATCHES_RCVD autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH/RFC 319/390] sh-pfc: Return an error if a pin doesn't support the requested direction X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org From: Laurent Pinchart When setting a pin direction verify that the requested direction is supported, and return an error if it isn't. This requires pin configuration information to be supplied by SoC data. The check is a no-op if the information is not supplied. Signed-off-by: Laurent Pinchart Acked-by: Linus Walleij (cherry picked from commit 6dc9b4550a74cad7daed0be192030983dad44755) Signed-off-by: Simon Horman --- drivers/pinctrl/sh-pfc/pinctrl.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c index 52179bb..aef268b 100644 --- a/drivers/pinctrl/sh-pfc/pinctrl.c +++ b/drivers/pinctrl/sh-pfc/pinctrl.c @@ -218,8 +218,18 @@ static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; unsigned long flags; + unsigned int dir; int ret; + /* Check if the requested direction is supported by the pin. Not all SoC + * provide pin config data, so perform the check conditionally. + */ + if (pin->configs) { + dir = input ? SH_PFC_PIN_CFG_INPUT : SH_PFC_PIN_CFG_OUTPUT; + if (!(pin->configs & dir)) + return -EINVAL; + } + spin_lock_irqsave(&pfc->lock, flags); ret = sh_pfc_config_mux(pfc, pin->enum_id, new_type);