From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC5F1C43441 for ; Thu, 15 Nov 2018 09:36:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A0090223CB for ; Thu, 15 Nov 2018 09:36:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A0090223CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csie.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-bluetooth-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388196AbeKOTnO (ORCPT ); Thu, 15 Nov 2018 14:43:14 -0500 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76]:46464 "EHLO wens.csie.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728887AbeKOTnL (ORCPT ); Thu, 15 Nov 2018 14:43:11 -0500 Received: by wens.csie.org (Postfix, from userid 1000) id BEE595FCA9; Thu, 15 Nov 2018 17:36:04 +0800 (CST) From: Chen-Yu Tsai To: Marcel Holtmann , Johan Hedberg , Rob Herring , Mark Rutland , Maxime Ripard Cc: Chen-Yu Tsai , Loic Poulain , linux-bluetooth@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 05/15] Bluetooth: hci_bcm: Handle deferred probing for the clock supply Date: Thu, 15 Nov 2018 17:35:53 +0800 Message-Id: <20181115093603.26729-6-wens@csie.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181115093603.26729-1-wens@csie.org> References: <20181115093603.26729-1-wens@csie.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org 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. 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)) -- 2.19.1