From patchwork Mon Dec 17 04:04:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 10732717 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ED56F14E5 for ; Mon, 17 Dec 2018 04:07:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DB03D29743 for ; Mon, 17 Dec 2018 04:07:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CA9BF29D17; Mon, 17 Dec 2018 04:07:05 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 730F229743 for ; Mon, 17 Dec 2018 04:07:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7rT1MpP+5AgHoIWPODjyKKo9J4FIWmWVgykJzggN3cY=; b=B9lE4jCVK596i9 9xaWFtpWaVrMQJx6ca1hXKLBpu4oHDEnBwgrrcVH/yhz+d+vnZYTkgGavVLDWSvXtleuoWp3GYmFG N4SN4yx6QtBE0w7NSCDpFPJNyhNJ4wdh1IAQMjnQhxakkHxkB5CGvOTyxEodBelhqgikwPhD23gGN TflSqRG4KicUGIGs5VM4svSSmJduR691pfEBu1QBdnwqA3EavmNuBEZOkAf2m4aDhnVUJavRjMaEa ftKnCnbBmgZ/Zbvq6h4wXtEnpEEomk4fUYVeOHKep3p9FBFTw//CHn1miohudRs/jLslNQXrr7+fF +wLxO3XSxudpsjfvF2FQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gYkBI-0001nz-Fd; Mon, 17 Dec 2018 04:07:00 +0000 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76] helo=wens.csie.org) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gYk9v-0000FG-9Z for linux-arm-kernel@lists.infradead.org; Mon, 17 Dec 2018 04:05:44 +0000 Received: by wens.csie.org (Postfix, from userid 1000) id 5F2015FD13; Mon, 17 Dec 2018 12:05:03 +0800 (CST) From: Chen-Yu Tsai To: Marcel Holtmann , Johan Hedberg , Rob Herring , Mark Rutland , Maxime Ripard Subject: [PATCH v3 05/15] Bluetooth: hci_bcm: Handle deferred probing for the clock supply Date: Mon, 17 Dec 2018 12:04:39 +0800 Message-Id: <20181217040449.31437-6-wens@csie.org> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20181217040449.31437-1-wens@csie.org> References: <20181217040449.31437-1-wens@csie.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181216_200536_061148_A80DC1F4 X-CRM114-Status: GOOD ( 10.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ondrej Jirman , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, Chen-Yu Tsai , Loic Poulain , linux-arm-kernel@lists.infradead.org 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 On some systems that actually have the bluetooth controller wired up with an extra clock signal, it's possible the bluetooth controller probes before the clock provider. clk_get would return a defer probe error, which was not handled by this driver. Handle this properly, so that these systems can work reliably. Tested-by: Ondrej Jirman Signed-off-by: Chen-Yu Tsai --- drivers/bluetooth/hci_bcm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index ddbd8c6a0ceb..800132369134 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -907,6 +907,10 @@ static int bcm_get_resources(struct bcm_device *dev) dev->clk = devm_clk_get(dev->dev, NULL); + /* Handle deferred probing */ + if (dev->clk == ERR_PTR(-EPROBE_DEFER)) + return PTR_ERR(dev->clk); + dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", GPIOD_OUT_LOW); if (IS_ERR(dev->device_wakeup))