From patchwork Wed Dec 28 22:56:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 9490707 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 9A69162AB0 for ; Wed, 28 Dec 2016 22:59:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 869542623D for ; Wed, 28 Dec 2016 22:59:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7B25626490; Wed, 28 Dec 2016 22:59:34 +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=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 12FE92623D for ; Wed, 28 Dec 2016 22:59:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cMNAo-0001H3-Jb; Wed, 28 Dec 2016 22:58:18 +0000 Received: from mail-pg0-x22d.google.com ([2607:f8b0:400e:c05::22d]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cMNA8-00010Q-Iq for linux-arm-kernel@lists.infradead.org; Wed, 28 Dec 2016 22:57:40 +0000 Received: by mail-pg0-x22d.google.com with SMTP id y62so107846877pgy.1 for ; Wed, 28 Dec 2016 14:57:15 -0800 (PST) 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=dvY89DX/gTxupcZmHNFKKuoEzxS+g7fsnytbgsbXu00=; b=R7Tavrc99fQLygzFsfcWjmyT1YopFGlsMIzjgFwyU2Q/V7ur8vsdQ2gH2SMdgAq43d EDoMVKrDdAVy/ZXHxY4UQ6tGVy8oPZqbl9H+WrRvNcoReMtU+Mn8qCZZcplbLOiyJFzj LygmnEZ9sV5sqRt0zYNFMohZoMvCnjaYhf/Co= 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=dvY89DX/gTxupcZmHNFKKuoEzxS+g7fsnytbgsbXu00=; b=IdL1xHWtz0muTNA+GB18IxyKN6mraKXrY/TmzPl7X7/rvbdcns/6xtcYS3w7PLWqWM uh8zR45gwWAYSbrPdUEC5vtCgr2iCcpeK9Imykh/gFP3QCp89wXRdPUnjR37/fCO/83J nqvUuETRfo7EZWOHYbUFuV3Jx5nCAu79LIXMuni21ZBlTL69gyVpm6LpStz1zdORs36m x9PXoiOXAUU0nf/Ynp0c+Lek3TCuuclpGU8MF2eAHse36LwO9YmBUNDz2XxlwY6N2e6B iLxuKLsJsuaNRHUzxY0FoAidRB+ue7NkTOoOlnNpUkuycU/n61+1PdCiTwMs0DS4l3Gs AGYg== X-Gm-Message-State: AIkVDXKBRP99FNcRR5jIUj9o/eAAz1tInVS8zFVy86dlleYHHnMdfWSBjFBwTPh2gGEw8KBP X-Received: by 10.98.75.75 with SMTP id y72mr31866769pfa.23.1482965835003; Wed, 28 Dec 2016 14:57:15 -0800 (PST) Received: from localhost.localdomain (i-global254.qualcomm.com. [199.106.103.254]) by smtp.gmail.com with ESMTPSA id x4sm100355741pgc.14.2016.12.28.14.57.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 28 Dec 2016 14:57:14 -0800 (PST) From: Stephen Boyd To: linux-usb@vger.kernel.org Subject: [PATCH v6 01/25] of: device: Support loading a module with OF based modalias Date: Wed, 28 Dec 2016 14:56:47 -0800 Message-Id: <20161228225711.698-2-stephen.boyd@linaro.org> X-Mailer: git-send-email 2.10.0.297.gf6727b0 In-Reply-To: <20161228225711.698-1-stephen.boyd@linaro.org> References: <20161228225711.698-1-stephen.boyd@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161228_145736_695921_E72F861F X-CRM114-Status: GOOD ( 12.40 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Felipe Balbi , Arnd Bergmann , Neil Armstrong , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Andersson , devicetree@vger.kernel.org, Peter Chen , Andy Gross , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP In the case of ULPI devices, we want to be able to load the driver before registering the device so that we don't get stuck in a loop waiting for the phy module to appear and failing usb controller probe. Currently we request the ulpi module via the ulpi ids, but in the DT case we might need to request it with the OF based modalias instead. Add a common function that allows anyone to request a module with the OF based modalias. Acked-by: Rob Herring Cc: Signed-off-by: Stephen Boyd --- drivers/of/device.c | 23 +++++++++++++++++++++++ include/linux/of_device.h | 6 ++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/of/device.c b/drivers/of/device.c index fd5cfad7c403..8a22a253a830 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -226,6 +226,29 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) return tsize; } +int of_device_request_module(struct device *dev) +{ + char *str; + ssize_t size; + int ret; + + size = of_device_get_modalias(dev, NULL, 0); + if (size < 0) + return size; + + str = kmalloc(size + 1, GFP_KERNEL); + if (!str) + return -ENOMEM; + + of_device_get_modalias(dev, str, size); + str[size] = '\0'; + ret = request_module(str); + kfree(str); + + return ret; +} +EXPORT_SYMBOL_GPL(of_device_request_module); + /** * of_device_uevent - Display OF related uevent information */ diff --git a/include/linux/of_device.h b/include/linux/of_device.h index cc7dd687a89d..e9afbcc8de12 100644 --- a/include/linux/of_device.h +++ b/include/linux/of_device.h @@ -37,6 +37,7 @@ extern const void *of_device_get_match_data(const struct device *dev); extern ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len); +extern int of_device_request_module(struct device *dev); extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env); extern int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env); @@ -78,6 +79,11 @@ static inline int of_device_get_modalias(struct device *dev, return -ENODEV; } +static inline int of_device_request_module(struct device *dev) +{ + return -ENODEV; +} + static inline int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) {