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=unavailable 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 359FEC3F2CD for ; Tue, 3 Mar 2020 02:50:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ECD752166E for ; Tue, 3 Mar 2020 02:50:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583203859; bh=JWZ9FwWt1KKnILBTWu7vLkJhY59MMHT8tRRn+QvVnhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=PDYUEp0Q+US192HiyE7y1dkPDEkQK1Dl/IYCFui8QCxvUf2SsXNKLDfTe2F+9QNJf c8jJqXJjHbTa8JeJSWsI9sFqN3+Y6RVwY9E0JEvnmS2K4ODb+e/Ltg7Mv61jy4ZUUi RzaTaKd1l5C/So2W2MqPD2ITy7c8RPOxIERwGXMY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729219AbgCCCug (ORCPT ); Mon, 2 Mar 2020 21:50:36 -0500 Received: from mail.kernel.org ([198.145.29.99]:47576 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729202AbgCCCue (ORCPT ); Mon, 2 Mar 2020 21:50:34 -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 23248246DD; Tue, 3 Mar 2020 02:50:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583203834; bh=JWZ9FwWt1KKnILBTWu7vLkJhY59MMHT8tRRn+QvVnhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D1yc3m6UGhu+EgkElVLLBAhd7I6Cmg29F8sxaZjVYbAmgTB1Y0fWlmU7xCI+gy1MT om0ve+plIAFT9pFXVHYIvVl2Wwtg0IG45OerYexBlLdkPyHOd3ZdbSNxBGDRZALIHV TnUmornTzEgQ/JlbIMINIq/UFh5DsF7xaus0BRSE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Marek Vasut , "David S . Miller" , Lukas Wunner , Petr Stetiar , YueHaibing , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 09/11] net: ks8851-ml: Fix 16-bit IO operation Date: Mon, 2 Mar 2020 21:50:19 -0500 Message-Id: <20200303025021.10754-9-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200303025021.10754-1-sashal@kernel.org> References: <20200303025021.10754-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Marek Vasut [ Upstream commit 58292104832fef6cb4a89f736012c0e0724c3442 ] The Micrel KSZ8851-16MLLI datasheet DS00002357B page 12 states that BE[3:0] signals are active high. This contradicts the measurements of the behavior of the actual chip, where these signals behave as active low. For example, to read the CIDER register, the bus must expose 0xc0c0 during the address phase, which means BE[3:0]=4'b1100. Signed-off-by: Marek Vasut Cc: David S. Miller Cc: Lukas Wunner Cc: Petr Stetiar Cc: YueHaibing Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/micrel/ks8851_mll.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c index 20356976b9772..d94e151cff12b 100644 --- a/drivers/net/ethernet/micrel/ks8851_mll.c +++ b/drivers/net/ethernet/micrel/ks8851_mll.c @@ -484,7 +484,7 @@ static int msg_enable; static u16 ks_rdreg16(struct ks_net *ks, int offset) { - ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02)); + ks->cmd_reg_cache = (u16)offset | ((BE3 | BE2) >> (offset & 0x02)); iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); return ioread16(ks->hw_addr); } @@ -499,7 +499,7 @@ static u16 ks_rdreg16(struct ks_net *ks, int offset) static void ks_wrreg16(struct ks_net *ks, int offset, u16 value) { - ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02)); + ks->cmd_reg_cache = (u16)offset | ((BE3 | BE2) >> (offset & 0x02)); iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); iowrite16(value, ks->hw_addr); } -- 2.20.1