From patchwork Thu Oct 1 10:52:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Grygorii Strashko X-Patchwork-Id: 11811293 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4528D6CA for ; Thu, 1 Oct 2020 10:54:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23A3B2085B for ; Thu, 1 Oct 2020 10:54:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="QlBMJAg2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732290AbgJAKyC (ORCPT ); Thu, 1 Oct 2020 06:54:02 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:34148 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731131AbgJAKxo (ORCPT ); Thu, 1 Oct 2020 06:53:44 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 091ArfJE098013; Thu, 1 Oct 2020 05:53:41 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1601549621; bh=idzDZS3t19L8wRQZKa6Vh6pC95NRUb0c9lKcadtfYiI=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=QlBMJAg2BpzzS8ZobF6HUul6iL4geeFKkrHT5xNn2EjZyXo83zoBwaIy2jMLMUSIM d7aX3bQ6pIlIm8hJflyUxaSG5Iwz0BOAA2IZKNsmmk5J16KmJ/HeNNyjthnkKeHahV BNWMX3uvyNWFbAfRCY+XrbOEba510pWjRkmPWv5k= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 091Arf0Y049910 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 1 Oct 2020 05:53:41 -0500 Received: from DLEE114.ent.ti.com (157.170.170.25) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 1 Oct 2020 05:53:40 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 1 Oct 2020 05:53:40 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 091ArdwG072524; Thu, 1 Oct 2020 05:53:40 -0500 From: Grygorii Strashko To: "David S. Miller" , , Jakub Kicinski , Vignesh Raghavendra CC: Sekhar Nori , , , Murali Karicheri , Grygorii Strashko Subject: [PATCH net-next 6/8] net: ethernet: ti: am65-cpsw: keep active if cpts enabled Date: Thu, 1 Oct 2020 13:52:56 +0300 Message-ID: <20201001105258.2139-7-grygorii.strashko@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201001105258.2139-1-grygorii.strashko@ti.com> References: <20201001105258.2139-1-grygorii.strashko@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Some K3 CPSW NUSS instances can lose context after PM runtime ON->OFF->ON transition depending on integration (including all submodules: CPTS, MDIO, etc), like J721E Main CPSW (CPSW9G). In case CPTS is enabled it's initialized during probe and does not expect to be reset. Hence, keep K3 CPSW active by forbidding PM runtime if CPTS is enabled. Signed-off-by: Grygorii Strashko --- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index fecaf6b8270f..0bc0eec46709 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -1727,6 +1727,13 @@ static int am65_cpsw_init_cpts(struct am65_cpsw_common *common) return ret; } common->cpts = cpts; + /* Forbid PM runtime if CPTS is running. + * K3 CPSWxG modules may completely lose context during ON->OFF + * transitions depending on integration. + * AM65x/J721E MCU CPSW2G: false + * J721E MAIN_CPSW9G: true + */ + pm_runtime_forbid(dev); return 0; }