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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 51089FA372C for ; Fri, 8 Nov 2019 11:45:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C06922478 for ; Fri, 8 Nov 2019 11:45:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573213507; bh=vn/21sVwQ2K1AtlyTNj8Njl/NzU1TgIYkZgxejPPKHE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=R6/8+gZWRv75WNWx30atD4cOY0Gbi4LiUYp9ELA98Ao6XH3daZLD/ACs4k2Znfghi lwtPlJkLeBhr7wdlNfGWpRLLzDSVjlQorxK1LMYTFAelIXK0AQnediRiJ9d8hoC+bT EVtJuJ2PEWQ5MZWhK95N1ipit9IipS6jLTXegSD4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388235AbfKHLpF (ORCPT ); Fri, 8 Nov 2019 06:45:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:59940 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390961AbfKHLoz (ORCPT ); Fri, 8 Nov 2019 06:44:55 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B8CE7222C4; Fri, 8 Nov 2019 11:44:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573213495; bh=vn/21sVwQ2K1AtlyTNj8Njl/NzU1TgIYkZgxejPPKHE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vD4+ovqqFXfJd4l0LXE4QMGLbo/Dz9FesLqM8l0eNAFnKMHjD4alMUimShBse8zWp cTOCnlINONnzEo0SpvXuK69DWFEr1502hDr5j5XTwyE9VeWqBqpFllrM9UQsayvEII EYKiapC1BYcwzJbDmA+cc6J7rRRE3sS3PDS67LT8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Oleksij Rempel , Shawn Guo , Sasha Levin Subject: [PATCH AUTOSEL 4.14 073/103] ARM: imx6: register pm_power_off handler if "fsl,pmic-stby-poweroff" is set Date: Fri, 8 Nov 2019 06:42:38 -0500 Message-Id: <20191108114310.14363-73-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191108114310.14363-1-sashal@kernel.org> References: <20191108114310.14363-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 ecdf071653d4d..6078bcc9f594a 100644 --- a/arch/arm/mach-imx/pm-imx6.c +++ b/arch/arm/mach-imx/pm-imx6.c @@ -604,6 +604,28 @@ 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; @@ -620,6 +642,9 @@ 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