From patchwork Tue Jul 28 09:02:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bruno Thomsen X-Patchwork-Id: 1337659 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=rvoGdSXC; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BG9fb1w4mz9sSt for ; Tue, 28 Jul 2020 19:02:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728362AbgG1JCO (ORCPT ); Tue, 28 Jul 2020 05:02:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728325AbgG1JCN (ORCPT ); Tue, 28 Jul 2020 05:02:13 -0400 Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 206ECC061794 for ; Tue, 28 Jul 2020 02:02:13 -0700 (PDT) Received: by mail-lj1-x244.google.com with SMTP id v4so10622253ljd.0 for ; Tue, 28 Jul 2020 02:02:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Zn4g1GhYdlCyctZ7NV2DdklRVZWr/tORWNWKAWMPXxc=; b=rvoGdSXC448vO2LRRAbusNfN+Zp/O3so+sZ7ywUaTe2qU1sbEmNK9pJzIrL7FyHy+o UTX8IcjJQuYzAr2E/0/J1SceNhyzH13vhzdiHZYGLVOoCNge73Be3JyTdxCjD5rXhcTs L0prP4ZIlKU+GaPzQ1XVt8s2DZ3iRRYA1YetlFpgjAFxIlOVqTGohFSoKk3MmkPcGCh6 GQwKTYkGVwGvTB7ceNy9WxFL7MkpkYoEuSJaMWmlQbD94G1E8iZmQf6ERDheDYQf0kSM FIIs7NWsOjE91ElxWPSq3N+nHghPMjhK/uT8wtM7pMi7UxxVMg4yArwBAQKiEqJ+v2mi fH3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Zn4g1GhYdlCyctZ7NV2DdklRVZWr/tORWNWKAWMPXxc=; b=VrvYgGbdTzUWHpDe248wthtj8d0djSTfHvV9tPY0JVlqLK0Lhlt52Tz6arpCaWcn9t yTG1Vk11GtBEZBM5n9gYVR2GnKjpJTh34Yjp2vBQ9JKU05Y8WN54L+C7eV9D1VOYiDw3 GVem44/BiGKdZvgpuXWpaFB/j0P6wQEwIH3mkDxQAZP3fpEH2HPyZdxORg4ilXrBIHRz LXAnfzFa52rXdeZF50pgjbiAGkKLBwjvAj70B0tr9aMc2SukcK8yqcJ/j268+Kpn3oyr G1ZL9YWjqU5rW1y6uxfdv99UOUdbnJNWWgZ/+YWNHivDpngq8KvRtMP732AeQkbsGdX+ Frvw== X-Gm-Message-State: AOAM530BM27NFzivTQX6MWmE5DSHpNcRd9d0N1wTMP5dxjPA/oQptHwC 2kQ0xtnBJKyQDKUK0pJftIofAMtEiknKaQ== X-Google-Smtp-Source: ABdhPJwZzxMoLecCDxo2pjfHsKMpYDLlr2NeeEX26jRIe5jjmOirUGBJtSpewcK8eUZ2xk09VOM+Gw== X-Received: by 2002:a2e:91da:: with SMTP id u26mr12443822ljg.311.1595926927547; Tue, 28 Jul 2020 02:02:07 -0700 (PDT) Received: from xps13.kamstrup.dk ([185.181.22.4]) by smtp.googlemail.com with ESMTPSA id h21sm2836352ljk.31.2020.07.28.02.02.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jul 2020 02:02:06 -0700 (PDT) From: Bruno Thomsen To: netdev Cc: Bruno Thomsen , Andrew Lunn , Fabio Estevam , Florian Fainelli , Russell King - ARM Linux , Heiner Kallweit , Lars Alex Pedersen , Bruno Thomsen Subject: [PATCH 1/2] net: mdiobus: reset deassert delay Date: Tue, 28 Jul 2020 11:02:02 +0200 Message-Id: <20200728090203.17313-1-bruno.thomsen@gmail.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The current reset logic only has a delay during assert. This reuses the delay value as deassert delay to ensure PHYs are ready for commands. Delays are typically needed when external hardware slows down reset release with a RC network. This solution does not need any new device tree bindings. It also improves handling of long delays (>20ms) by using the generic fsleep() for selecting appropriate delay function. Signed-off-by: Bruno Thomsen --- drivers/net/phy/mdio_bus.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) base-commit: 92ed301919932f777713b9172e525674157e983d diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 6ceee82b2839..84d5ab07fe16 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -627,8 +627,9 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner) bus->reset_gpiod = gpiod; gpiod_set_value_cansleep(gpiod, 1); - udelay(bus->reset_delay_us); + fsleep(bus->reset_delay_us); gpiod_set_value_cansleep(gpiod, 0); + fsleep(bus->reset_delay_us); } if (bus->reset) {