From patchwork Tue Mar 30 11:01:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12172293 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 B7AE7C433E0 for ; Tue, 30 Mar 2021 11:04:16 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B89E61989 for ; Tue, 30 Mar 2021 11:04:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B89E61989 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: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:List-Owner; bh=XJQPt8TeuDaBiiZLvSz7yQ47iYyoxe5pNyRiufESrYE=; b=quGf2YWU1BZiWex59BZ1tl56I L0bLQfEHwfe9UQZiwgikfB+NhQldgXHaJvy9QUVKO/JAJWHtRx/B5vtmbxoW7bmEwERoM+dxoDRWl Vljtq4k81WBurZmJoeFxdS7MyCK/6+cp6A4zUpg2+oVBcslFEZsj25DjQV2G1UAs+bPaaPoQGSmvV O+tsdTj6IEXOzHbiUGXO9pMverSWLbhnVfPPkqbf0y/YdhhZoDO9Dh6hKu2mGal1DJ5lDGHNU1mXX YcaFOLW4ZsTdlubeg3gaayD70YM+FvJti3LvKmTzB2Nq3og4gkaAbUsxGLZx/Xv6+u7EYnFvM5Mgd PxTQbsb0A==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lRCAQ-003VYo-9D; Tue, 30 Mar 2021 11:04:14 +0000 Received: from fllv0015.ext.ti.com ([198.47.19.141]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lRC8J-003Uyc-75 for linux-phy@lists.infradead.org; Tue, 30 Mar 2021 11:02:14 +0000 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 12UB1xNs058344; Tue, 30 Mar 2021 06:01:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1617102119; bh=dyOe3pqXIdf8j+8HvSMwBv/J0i5wdpG3jbV9aLdsIZ0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=dpclOnoD9zx3RN8v4H9CDxycMI+napWi9w1izugPIuLVBtcUcq0uOtc3oYgHpo4d+ H78oySkiebWh98uX060DO1yEVvGGwwqMNZIzslEwGfCWk8p9yUIHo2eFyxad9pQFjk Pv1jfoiZSetmOzzACiHdgQaTu72J7AFvEDD/v2eQ= Received: from DLEE104.ent.ti.com (dlee104.ent.ti.com [157.170.170.34]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 12UB1xkL023018 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 30 Mar 2021 06:01:59 -0500 Received: from DLEE113.ent.ti.com (157.170.170.24) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Tue, 30 Mar 2021 06:01:59 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE113.ent.ti.com (157.170.170.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Tue, 30 Mar 2021 06:01:59 -0500 Received: from a0393678-ssd.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12UB1dcn094447; Tue, 30 Mar 2021 06:01:56 -0500 From: Kishon Vijay Abraham I To: Kishon Vijay Abraham I , Vinod Koul , Philipp Zabel CC: Swapnil Jakhade , , , Lokesh Vutla Subject: [PATCH v2 5/5] phy: cadence-torrent: Add delay for PIPE clock to be stable Date: Tue, 30 Mar 2021 16:31:38 +0530 Message-ID: <20210330110138.24356-6-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210330110138.24356-1-kishon@ti.com> References: <20210330110138.24356-1-kishon@ti.com> 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-20210330_120203_883166_84408251 X-CRM114-Status: UNSURE ( 8.92 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org The Torrent spec specifies delay of 660.5us after phy_reset is asserted by the controller. To be on the safe side provide a delay of 5ms to 10ms in ->phy_on() callback where the SERDES is already configured in bootloader. Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/cadence/phy-cadence-torrent.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index ff8bb4b724c0..0477e7beebbf 100644 --- a/drivers/phy/cadence/phy-cadence-torrent.c +++ b/drivers/phy/cadence/phy-cadence-torrent.c @@ -371,7 +371,16 @@ static const struct phy_ops cdns_torrent_phy_ops = { .owner = THIS_MODULE, }; +static int cdns_torrent_noop_phy_on(struct phy *phy) +{ + /* Give 5ms to 10ms delay for the PIPE clock to be stable */ + usleep_range(5000, 10000); + + return 0; +} + static const struct phy_ops noop_ops = { + .power_on = cdns_torrent_noop_phy_on, .owner = THIS_MODULE, };