From patchwork Mon Aug 12 08:37:18 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Mack X-Patchwork-Id: 2842885 Return-Path: X-Original-To: patchwork-linux-arm@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 51C0CBF546 for ; Mon, 12 Aug 2013 08:40:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3643120150 for ; Mon, 12 Aug 2013 08:40:41 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 57E97201BB for ; Mon, 12 Aug 2013 08:40:39 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V8nes-0006dS-U2; Mon, 12 Aug 2013 08:39:24 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1V8neO-0001yc-Qx; Mon, 12 Aug 2013 08:38:52 +0000 Received: from svenfoo.org ([82.94.215.22] helo=mail.zonque.de) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V8ndo-0001pd-4v for linux-arm-kernel@lists.infradead.org; Mon, 12 Aug 2013 08:38:17 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.zonque.de (Postfix) with ESMTP id 72CD6C555B; Mon, 12 Aug 2013 10:37:33 +0200 (CEST) Received: from mail.zonque.de ([127.0.0.1]) by localhost (rambrand.bugwerft.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0_inLmiXtQo2; Mon, 12 Aug 2013 10:37:33 +0200 (CEST) Received: from tamtam.fritz.box (p5DDC63EC.dip0.t-ipconnect.de [93.220.99.236]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.zonque.de (Postfix) with ESMTPSA id B7ABCC5561; Mon, 12 Aug 2013 10:37:32 +0200 (CEST) From: Daniel Mack To: haojian.zhuang@linaro.org, eric.y.miao@gmail.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH 5/5] ARM: pxa: ssp: add pxa_ssp_request_of() Date: Mon, 12 Aug 2013 10:37:18 +0200 Message-Id: <1376296638-19804-6-git-send-email-zonque@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1376296638-19804-1-git-send-email-zonque@gmail.com> References: <1376296638-19804-1-git-send-email-zonque@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130812_043816_329256_7203D857 X-CRM114-Status: GOOD ( 12.38 ) X-Spam-Score: -0.2 (/) Cc: devicetree@vger.kernel.org, arnd@arndb.de, s.neumann@raumfeld.com, Daniel Mack , broonie@kernel.org, rmk+kernel@arm.linux.org.uk X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=unavailable 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 Add a function to lookup ssp devices from device tree. This way, users can reference the ssp devices in order to register to them. Signed-off-by: Daniel Mack --- arch/arm/plat-pxa/ssp.c | 25 +++++++++++++++++++++++++ include/linux/pxa2xx_ssp.h | 11 +++++++++++ 2 files changed, 36 insertions(+) diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c index f266135..c83f27b 100644 --- a/arch/arm/plat-pxa/ssp.c +++ b/arch/arm/plat-pxa/ssp.c @@ -62,6 +62,30 @@ struct ssp_device *pxa_ssp_request(int port, const char *label) } EXPORT_SYMBOL(pxa_ssp_request); +struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node, + const char *label) +{ + struct ssp_device *ssp = NULL; + + mutex_lock(&ssp_lock); + + list_for_each_entry(ssp, &ssp_list, node) { + if (ssp->of_node == of_node && ssp->use_count == 0) { + ssp->use_count++; + ssp->label = label; + break; + } + } + + mutex_unlock(&ssp_lock); + + if (&ssp->node == &ssp_list) + return NULL; + + return ssp; +} +EXPORT_SYMBOL(pxa_ssp_request_of); + void pxa_ssp_free(struct ssp_device *ssp) { mutex_lock(&ssp_lock); @@ -185,6 +209,7 @@ static int pxa_ssp_probe(struct platform_device *pdev) } ssp->use_count = 0; + ssp->of_node = dev->of_node; mutex_lock(&ssp_lock); list_add(&ssp->node, &ssp_list); diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h index 467cc63..4944420 100644 --- a/include/linux/pxa2xx_ssp.h +++ b/include/linux/pxa2xx_ssp.h @@ -21,6 +21,8 @@ #include #include +#include + /* * SSP Serial Port Registers @@ -190,6 +192,8 @@ struct ssp_device { int irq; int drcmr_rx; int drcmr_tx; + + struct device_node *of_node; }; /** @@ -218,11 +222,18 @@ static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg) #ifdef CONFIG_ARCH_PXA struct ssp_device *pxa_ssp_request(int port, const char *label); void pxa_ssp_free(struct ssp_device *); +struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node, + const char *label); #else static inline struct ssp_device *pxa_ssp_request(int port, const char *label) { return NULL; } +static inline struct ssp_device *pxa_ssp_request_of(const struct device_node *n, + const char *name) +{ + return NULL; +} static inline void pxa_ssp_free(struct ssp_device *ssp) {} #endif