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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 CAEBFC43441 for ; Tue, 27 Nov 2018 07:52:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 94B7320873 for ; Tue, 27 Nov 2018 07:52:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 94B7320873 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729275AbeK0StY (ORCPT ); Tue, 27 Nov 2018 13:49:24 -0500 Received: from metis.ext.pengutronix.de ([85.220.165.71]:41611 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729104AbeK0StY (ORCPT ); Tue, 27 Nov 2018 13:49:24 -0500 Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gRYAM-0002eu-Dd; Tue, 27 Nov 2018 08:52:18 +0100 Received: from [IPv6:2003:c7:71e:feac:c591:f55c:bb67:31f5] (unknown [IPv6:2003:c7:71e:feac:c591:f55c:bb67:31f5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mkl@blackshift.org", Issuer "StartCom Class 1 Client CA" (not verified)) (Authenticated sender: mkl@blackshift.org) by smtp.blackshift.org (Postfix) with ESMTPSA id A98F139686D; Tue, 27 Nov 2018 07:52:15 +0000 (UTC) To: Joakim Zhang , "wg@grandegger.com" , "davem@davemloft.net" Cc: "linux-can@vger.kernel.org" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , dl-linux-imx , Aisheng DONG References: <20181019094326.28185-1-qiangqing.zhang@nxp.com> <24a43a20-7302-c449-06b3-5ee8f6c051a0@pengutronix.de> From: Marc Kleine-Budde Openpgp: preference=signencrypt Autocrypt: addr=mkl@pengutronix.de; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/27/18 8:44 AM, Joakim Zhang wrote: >>> Flexcan will be disabled during suspend if no wakeup function required >>> and enabled after resume accordingly. During this period, we could >>> explicitly disable clocks. >>> >>> Implement Runtime PM which will: >>> 1) Keep device in suspend state (clocks disabled) if it's not openned >>> 2) Make Power Domain framework be able to shutdown the corresponding >>> power domain of this device. >> >> Without CONFIG_PM the device fails to probe: >> >>> [ 214.420606] flexcan 2090000.flexcan: 2090000.flexcan supply xceiver >>> not found, using dummy regulator [ 214.445952] flexcan >>> 2090000.flexcan: Linked as a consumer to regulator.0 [ 214.453448] >>> flexcan 2090000.flexcan: registering netdev failed [ 214.459666] >>> flexcan 2090000.flexcan: Dropping the link to regulator.0 [ >>> 214.472066] flexcan: probe of 2090000.flexcan failed with error -110 > I would sent V2 rebased on patch "can: flexcan: add self wakeup > support", and runtime pm works normally on MX6SX-SDB and MX7D-SDB. > So, could you tell me which board you tested on that causes the > device probe failed? I tested on an imx6dl riotboard (https://elixir.bootlin.com/linux/latest/source/arch/arm/boot/dts/imx6dl-riotboard.dts + patches to enable CAN1) with an external PHY. > And that CONFIG_PM has set in imx_v6_v7_defconfig which config file I used. I disabled CONFIG_PM on purpose. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |