From patchwork Wed May 16 11:36:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 10403643 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 56A14601C8 for ; Wed, 16 May 2018 11:39:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 451F528578 for ; Wed, 16 May 2018 11:39:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 381A22863B; Wed, 16 May 2018 11:39:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7E78C28578 for ; Wed, 16 May 2018 11:39:23 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id D73402673A4; Wed, 16 May 2018 13:39:14 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 7B0A2267365; Wed, 16 May 2018 13:39:11 +0200 (CEST) Received: from mail-wr0-f196.google.com (mail-wr0-f196.google.com [209.85.128.196]) by alsa0.perex.cz (Postfix) with ESMTP id 920A526707F for ; Wed, 16 May 2018 13:39:09 +0200 (CEST) Received: by mail-wr0-f196.google.com with SMTP id g21-v6so560845wrb.8 for ; Wed, 16 May 2018 04:39:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=orK3jueeD8iKHAfbK5diacUPArijIBIe08XpYi0WLvQ=; b=QdR4wsqtI2+tyCn+geUPjY5TXTtrJIPqA+e6ezV2Jh0xD95sG0RxXFz398XHZAA/X9 m4Xz0DxRp6GThbGqkeBFgu4zt6mQTnHsCPXDPmDHapsl1qiL21FBInsZNFu9QrYxORok 93G8j4hqBjG9X7XOIutmrda7FpF4zUlCglydg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=orK3jueeD8iKHAfbK5diacUPArijIBIe08XpYi0WLvQ=; b=XGDlr8xsrJ4MqI2wkUwmJtJOXSpo7BHRpEct3lPuvuOY2OyhFFIfAxt22AfjxXTXf4 /mtORxjxzSDIxF4CEscG8Y2SfZfiitcKjekJqGBowtxoEHArQRB20N+4xkDMKZ/RSZKK 20BmRxoI+s6mBEskIaQsbJYwp9K7iTmBpxcY5oxKvblAjeHhaaRV577Y3+vCaaE8g70R Axahd8ugQ2h+JsGMC9QtZKThYKqvk4nLwOdaWijiohYEF9Pl8qZj687TAR6SXZTXylb0 dUnNQ7dPds+B7+B0MBHUrfcRKUciEwXpT9sYwKQ4o3yP310E0heQPn/pXH5sI7tH9RHY K8RQ== X-Gm-Message-State: ALKqPwc8szsOLJG7ceL4//RnkzEaeLEpwisSO9MlNXee6L8DYBp71fPP 1IN6iXGHFRWf2zsW2tW8UNYnsw== X-Google-Smtp-Source: AB8JxZoO5JriTfuuLrZYeCwZVhP//7EcIa3X2/3nwrHD5FQQFjZUI9rY6RdNSJpuEcLOM3r6JF6DXg== X-Received: by 2002:adf:c613:: with SMTP id n19-v6mr492643wrg.177.1526470749102; Wed, 16 May 2018 04:39:09 -0700 (PDT) Received: from localhost.localdomain (cpc90716-aztw32-2-0-cust92.18-1.cable.virginm.net. [86.26.100.93]) by smtp.gmail.com with ESMTPSA id k126-v6sm4504263wmd.45.2018.05.16.04.39.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 16 May 2018 04:39:08 -0700 (PDT) From: Srinivas Kandagatla To: gregkh@linuxfoundation.org Date: Wed, 16 May 2018 12:36:36 +0100 Message-Id: <20180516113642.28136-2-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180516113642.28136-1-srinivas.kandagatla@linaro.org> References: <20180516113642.28136-1-srinivas.kandagatla@linaro.org> Cc: alsa-devel@alsa-project.org, Srinivas Kandagatla , linux-kernel@vger.kernel.org Subject: [alsa-devel] [PATCH 1/7] slimbus: core: add of_slim_device_get() helper X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP On SLIMBus controllers like Qcom NGD(non ported device), controller can request logical address once the remote side is powered, having a helper function like this to explicitly enumerate the bus is helpful. Also codec drivers which are taking to interface device would need such a helper too. Signed-off-by: Srinivas Kandagatla --- drivers/slimbus/core.c | 39 +++++++++++++++++++++++++++++++++++++++ include/linux/slimbus.h | 2 ++ 2 files changed, 41 insertions(+) diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c index 7ddfc675b131..88248a4ecad9 100644 --- a/drivers/slimbus/core.c +++ b/drivers/slimbus/core.c @@ -356,6 +356,45 @@ struct slim_device *slim_get_device(struct slim_controller *ctrl, } EXPORT_SYMBOL_GPL(slim_get_device); +static int of_slim_match_dev(struct device *dev, void *data) +{ + struct device_node *np = data; + struct slim_device *sbdev = to_slim_device(dev); + + return (sbdev->dev.of_node == np); +} + +static struct slim_device *of_find_slim_device(struct slim_controller *ctrl, + struct device_node *np) +{ + struct slim_device *sbdev; + struct device *dev; + + dev = device_find_child(ctrl->dev, np, of_slim_match_dev); + if (dev) { + sbdev = to_slim_device(dev); + return sbdev; + } + + return NULL; +} + +/** + * of_slim_get_device() - get handle to a device using dt node. + * + * @ctrl: Controller on which this device will be added/queried + * @np: node pointer to device + * + * Return: pointer to a device if it has already reported. Creates a new + * device and returns pointer to it if the device has not yet enumerated. + */ +struct slim_device *of_slim_get_device(struct slim_controller *ctrl, + struct device_node *np) +{ + return of_find_slim_device(ctrl, np); +} +EXPORT_SYMBOL_GPL(of_slim_get_device); + static int slim_device_alloc_laddr(struct slim_device *sbdev, bool report_present) { diff --git a/include/linux/slimbus.h b/include/linux/slimbus.h index c36cf121d2cd..efa36a852dc3 100644 --- a/include/linux/slimbus.h +++ b/include/linux/slimbus.h @@ -138,6 +138,8 @@ static inline void slim_set_devicedata(struct slim_device *dev, void *data) dev_set_drvdata(&dev->dev, data); } +struct slim_device *of_slim_get_device(struct slim_controller *ctrl, + struct device_node *np); struct slim_device *slim_get_device(struct slim_controller *ctrl, struct slim_eaddr *e_addr); int slim_get_logical_addr(struct slim_device *sbdev);