From patchwork Fri May 25 14:36:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 10427645 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 C5B5C602D8 for ; Fri, 25 May 2018 14:39:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AAC5428DCB for ; Fri, 25 May 2018 14:39:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9F86C29773; Fri, 25 May 2018 14:39:36 +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=unavailable 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 D1C6628DCB for ; Fri, 25 May 2018 14:39:35 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 813E62676C3; Fri, 25 May 2018 16:38:43 +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 858AA2676A5; Fri, 25 May 2018 16:38:32 +0200 (CEST) Received: from mail-wm0-f65.google.com (mail-wm0-f65.google.com [74.125.82.65]) by alsa0.perex.cz (Postfix) with ESMTP id 7042C267693 for ; Fri, 25 May 2018 16:38:30 +0200 (CEST) Received: by mail-wm0-f65.google.com with SMTP id n10-v6so15198030wmc.1 for ; Fri, 25 May 2018 07:38:30 -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=oUkKrmU5AVMZemQXTuIe+E4X5Oz1OuqiCCPkqRKqp/s=; b=CcxqzJwc//n40W23kF9Cw9s8D2+pdzleCSZXm3Xit1NyfofHmZoGOxN7yjC/WI9LTW rZjc+jM8t428aBjLD+XAahUEiXd9hodH+a9oDhQIdwOyHFfb8qlTu40MPV8ZknDlCRSA QkhwdqBRvfDkij6jH1eh5q8IQ6hmnpB5qomtA= 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=oUkKrmU5AVMZemQXTuIe+E4X5Oz1OuqiCCPkqRKqp/s=; b=mHP8fWWqvtirA5oSJK4dsbqfx6XbIqoJU8fMNXl/95uE0ByQQdrqJmXxZY9fRbmNuZ s4+Z1diRi/9czETx1LvC5bCWVbSPIPAP8nBIhyMKdmnYIzHjCmm0NgHAK8NCxVJUKdk1 XGCExBOrSZ/CQrGU3zOkf37T9zjPtVgu6FTHSVFTNI0wz4KfeFkcqQ6Fcq5Y1f4i+aNn Tv/Z5hgVX0sJ8PWl2/xlBDmpNiAYP6jKC/MO9zn7Bm2nsLTjQfjIpM9YssjZIx5NuJLk NZZlPU/3aWlFh95g2wo+WrNSvXKTTGvvbeL6nX4/pyLaYUc2l+8nKbuyy8GLqELqUDNw lTFw== X-Gm-Message-State: ALKqPwcyV9vMU8GFbjEsOFcy0M8p9sY4jUntUgOWxMPj/ic9bTm2WIcb E6RC2zzhHudp6Sp0My6jRZNVrE3W+7c= X-Google-Smtp-Source: ADUXVKLV99Ct4qlr7FcBjbMpH6vy8AHJHo9FjtJKCQ6uKqV1dX1dIJlSy9eOr+fs5yOeoKHObTLw2g== X-Received: by 2002:a1c:1103:: with SMTP id 3-v6mr1929360wmr.26.1527259110002; Fri, 25 May 2018 07:38:30 -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 r6-v6sm26165729wrg.73.2018.05.25.07.38.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 25 May 2018 07:38:29 -0700 (PDT) From: Srinivas Kandagatla To: Greg Kroah-Hartman Date: Fri, 25 May 2018 15:36:18 +0100 Message-Id: <20180525143618.820-9-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180525143618.820-1-srinivas.kandagatla@linaro.org> References: <20180525143618.820-1-srinivas.kandagatla@linaro.org> Cc: alsa-devel@alsa-project.org, Srinivas Kandagatla , linux-kernel@vger.kernel.org Subject: [alsa-devel] [PATCH v3 8/8] 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 90af9eb26615..63801bcc5e60 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);