From patchwork Thu Apr 21 20:36:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Gerlach X-Patchwork-Id: 12822403 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D19C1C433EF for ; Thu, 21 Apr 2022 20:39:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=2a1Z73zzm13IMkiyE4uuCIQulkfKViiD/O988QEAapI=; b=pXB3wLxwXCvSfG aXSxHpIjgQkpBKMyTCSJRUTDuCQg7jOSOdG6j8TRjX50ITVz4Dj0BgNYM8cMF3mowbfgnNEzsuOPz 23J9x+7G8lMTI9RLZut8JgOs7cHrVusvet4VOX5fVC/kFFPQGKhP7d6Faz79dkpA8jxjb0bNJ1EIv zBWCmh1OGgJF48ytBONsL4z+4ZqNwoLwgNlezJRdshKyXugnhuaYJn6u2yZs6d3L1FU2u9zN9I4he MRFe71yW1+PYmBTVx2QIZ43fMXj52hZB87yPr8pNxJqCVAKraiYea2AQjuw5xUktPQO6g8XfqgOnO JhQGlsajpjwFqg/j29hw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nhdZM-00Ev8E-A0; Thu, 21 Apr 2022 20:38:28 +0000 Received: from fllv0015.ext.ti.com ([198.47.19.141]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nhdYq-00Euud-7y for linux-arm-kernel@lists.infradead.org; Thu, 21 Apr 2022 20:37:58 +0000 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 23LKbl9D086295; Thu, 21 Apr 2022 15:37:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1650573467; bh=fiIGiZ2hCyION5BKmzCgCDBVNqXIdGRylYKYLQZ5tjg=; h=From:To:CC:Subject:Date; b=tdQQwhBMXubbrpNpRi5aup6zXYw77wXf43qAwE1c62V00dPpRsZoww+ETAF8FRRXZ c0z5iNuW9a1W3molTOqcKvFn/h4F3w8O8+rOdNuIFa1iSqmoc57zctuXDGPZv0IMqO tR2PeBYSfDtYkGZdX0n2a9zRaxiEc5UtqC2gisU8= Received: from DLEE105.ent.ti.com (dlee105.ent.ti.com [157.170.170.35]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 23LKblZC003126 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 21 Apr 2022 15:37:47 -0500 Received: from DLEE106.ent.ti.com (157.170.170.36) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Thu, 21 Apr 2022 15:37:46 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE106.ent.ti.com (157.170.170.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Thu, 21 Apr 2022 15:37:46 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 23LKbka2012875; Thu, 21 Apr 2022 15:37:46 -0500 From: Dave Gerlach To: Rob Herring , Santosh Shilimkar , Krzysztof Kozlowski , Tero Kristo , Nishanth Menon CC: , , , Vignesh Raghavendra , Dave Gerlach Subject: [PATCH 0/6] firmware: ti_sci: Introduce system suspend support Date: Thu, 21 Apr 2022 15:36:53 -0500 Message-ID: <20220421203659.27853-1-d-gerlach@ti.com> X-Mailer: git-send-email 2.35.0 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220421_133756_405329_672147FB X-CRM114-Status: GOOD ( 13.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, This series introduces necessary ti_sci driver functionality in preparation of supporting DeepSleep mode for suspend to mem on TI K3 AM62 [1]. This series applies on top of [2], which is also required for proper system suspend operation. Deep Sleep mode is described in section "5.2.4.4 DeepSleep" of the AM62 Technical Reference Manual: https://www.ti.com/lit/pdf/spruiv7 The kernel triggers entry to Deep Sleep mode through the mem suspend transition with the following: * Use a TF-A binary that supports PSCI_SYSTEM_SUSPEND call, which is enabled by the pending patches here [3]. This causes system to use PSCI system suspend as last step of mem sleep. * The firmware requires that the OS sends a TISCI_MSG_PREPARE_SLEEP message in order to provide details about suspend, so we must add the ability to send this message. (Patch 3) * A memory carveout address must be provided to the firmware using the above message, which is passed through device tree to the driver. (Patches 1 and 4) * System must load firmware to a specific location before Deep Sleep is entered, and this is accomplished using an lpm memory region in device tree to indicate where this firmware should be loaded, and also a "ti,lpm-firmware-name" property to indicate the name of the firmware to load. The ti_sci driver checks in its suspend handler to see if the firmware has been loaded and if not, loads it. (Patches 2 and 5) * Finally, the ti_sci driver must actually send TISCI_MSG_PREPARE_SLEEP message to firmware with the above information included, which it does during the driver suspend handler when PM_MEM_SUSPEND is the determined state being entered. (Patch 6) This is tested on am625-sk using a ramdisk with all devices disabled apart from cpu0, main_uart0, dmsc, and secure_proxy_main. Regards, Dave [1] https://lore.kernel.org/lkml/20220225120239.1303821-1-vigneshr@ti.com/ [2] https://lore.kernel.org/lkml/20220412192138.31189-1-d-gerlach@ti.com/ [3] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/14714/3 Dave Gerlach (6): dt-bindings: ti,sci: Add ti,ctx-memory-region property dt-bindings: ti,sci: Add lpm region and ti,lpm-firmware-name firmware: ti_sci: Introduce Power Management Ops firmware: ti_sci: Introduce ti,ctx-memory-region for reserved LPM memory firmware: ti_sci: Use dt provided fw name and address to load at suspend time firmware: ti_sci: Introduce prepare system suspend call .../bindings/arm/keystone/ti,sci.yaml | 30 ++- drivers/firmware/ti_sci.c | 207 +++++++++++++++++- drivers/firmware/ti_sci.h | 32 ++- include/linux/soc/ti/ti_sci_protocol.h | 6 + 4 files changed, 269 insertions(+), 6 deletions(-)