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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 C2387C432C0 for ; Tue, 19 Nov 2019 05:32:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9941C21823 for ; Tue, 19 Nov 2019 05:32:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574141526; bh=bps7aspVj9ihpI9mgbBFifMa6gO24Le9UKHhslhfgzc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eGtXv/JNjXlLWLmSXkdMaooHgiLEUXy7dnK6GJIk9T8NXAs09kjyj3SarOVKKLJus cDVIGowF8oHJDTtJaMMZ5mcWy/3nRRTTihwLHY5yzY2zUzA4c7tP/3uxhf1QXoxz3Z I3q2h8w3n1RnsPdLZesHnNm/P3U0CTwKIKnrKGsE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729352AbfKSFcF (ORCPT ); Tue, 19 Nov 2019 00:32:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:52052 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727811AbfKSFcC (ORCPT ); Tue, 19 Nov 2019 00:32:02 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9316A208C3; Tue, 19 Nov 2019 05:32:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574141522; bh=bps7aspVj9ihpI9mgbBFifMa6gO24Le9UKHhslhfgzc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rsq9rnAiqADhhdmdQFohQvfzB5k0OrRsaY3CNomQRUXCBQ0aMCqnQ//uAkmakdgti xo3R9QkVHws1IQLQ70cGGR0RAX2bvYbkfjKus7E/XrcqUxDSeEo/hCDITdCSgqvtts se77CTZaurGeBchLFSOCCdif2JTp24i2QXmQCK5E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oleksij Rempel , Shawn Guo , Sasha Levin Subject: [PATCH 4.19 182/422] ARM: imx6: register pm_power_off handler if "fsl,pmic-stby-poweroff" is set Date: Tue, 19 Nov 2019 06:16:19 +0100 Message-Id: <20191119051410.265926410@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191119051400.261610025@linuxfoundation.org> References: <20191119051400.261610025@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oleksij Rempel [ Upstream commit 8148d2136002da2e2887caf6a07bbd9c033f14f3 ] One of the Freescale recommended sequences for power off with external PMIC is the following: ... 3. SoC is programming PMIC for power off when standby is asserted. 4. In CCM STOP mode, Standby is asserted, PMIC gates SoC supplies. See: http://www.nxp.com/assets/documents/data/en/reference-manuals/IMX6DQRM.pdf page 5083 This patch implements step 4. of this sequence. Signed-off-by: Oleksij Rempel Signed-off-by: Shawn Guo Signed-off-by: Sasha Levin --- arch/arm/mach-imx/pm-imx6.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c index b08e407d8d96f..529f4b5bbd3a7 100644 --- a/arch/arm/mach-imx/pm-imx6.c +++ b/arch/arm/mach-imx/pm-imx6.c @@ -618,6 +618,28 @@ static void __init imx6_pm_common_init(const struct imx6_pm_socdata IMX6Q_GPR1_GINT); } +static void imx6_pm_stby_poweroff(void) +{ + imx6_set_lpm(STOP_POWER_OFF); + imx6q_suspend_finish(0); + + mdelay(1000); + + pr_emerg("Unable to poweroff system\n"); +} + +static int imx6_pm_stby_poweroff_probe(void) +{ + if (pm_power_off) { + pr_warn("%s: pm_power_off already claimed %p %pf!\n", + __func__, pm_power_off, pm_power_off); + return -EBUSY; + } + + pm_power_off = imx6_pm_stby_poweroff; + return 0; +} + void __init imx6_pm_ccm_init(const char *ccm_compat) { struct device_node *np; @@ -634,6 +656,9 @@ void __init imx6_pm_ccm_init(const char *ccm_compat) val = readl_relaxed(ccm_base + CLPCR); val &= ~BM_CLPCR_LPM; writel_relaxed(val, ccm_base + CLPCR); + + if (of_property_read_bool(np, "fsl,pmic-stby-poweroff")) + imx6_pm_stby_poweroff_probe(); } void __init imx6q_pm_init(void) -- 2.20.1