summaryrefslogtreecommitdiff
path: root/SOURCES/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch
blob: d3dfe92c5b8ab09864a749bf0d9fe596dad4257c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
From patchwork Sun Oct 25 14:01:44 2020
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Adam Sampson <ats@offog.org>
X-Patchwork-Id: 11855267
Return-Path: 
 <SRS0=8R9C=EA=lists.infradead.org=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@kernel.org>
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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH,
	DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,
	MAILING_LIST_MULTI,SIGNED_OFF_BY,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 D1D99C388F7
	for <linux-arm-kernel@archiver.kernel.org>;
 Sun, 25 Oct 2020 14:04:02 +0000 (UTC)
Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134])
	(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 539B92225E
	for <linux-arm-kernel@archiver.kernel.org>;
 Sun, 25 Oct 2020 14:04:02 +0000 (UTC)
Authentication-Results: mail.kernel.org;
	dkim=pass (2048-bit key) header.d=lists.infradead.org
 header.i=@lists.infradead.org header.b="pKL4zMU1"
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 539B92225E
Authentication-Results: mail.kernel.org;
 dmarc=fail (p=none dis=none) header.from=offog.org
Authentication-Results: mail.kernel.org;
 spf=none
 smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
	d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding:
	Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive:
	List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject: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=Smw7tRUwTAlV9zXVX1uVl3+PN3QebXDyiZrExxBSCPU=; b=pKL4zMU1LMKGyGrnNBuRIJVlPn
	yMf8/tMv8w7BT/mMtZkxY22WUlN4IpqNLAx1mdiIa5VUVbVpdsXYWYdSWaUvJe24nyJi8NycxIoO8
	168UTytxMlzI5F18yr9bXZ79rSRW+/P0zQbb+OQPMPbJPNb1RusFtve8WGNCkqlOWUOpiVQqPFPJ9
	hGhOsDJhXjep7y7HNpu7+UBYvZInmOOrAS079WoEc1jX4u6zDXt0ox24r0Fcc8wnVpsWpGxPhb0xZ
	uZtguJOo2ItQdeT/6OfafjzV15qXfPGK+148ny4vyOvgHNvJX88R6RBIxqUdvQzoh10GTlb76K45i
	Gfx5ufkA==;
Received: from localhost ([::1] helo=merlin.infradead.org)
	by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux))
	id 1kWgb2-0000uB-6w; Sun, 25 Oct 2020 14:02:08 +0000
Received: from a-painless.mh.aa.net.uk ([2001:8b0:0:30::51]
 helo=alt.a-painless.mh.aa.net.uk)
 by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux))
 id 1kWgaz-0000tq-Kq
 for linux-arm-kernel@lists.infradead.org; Sun, 25 Oct 2020 14:02:06 +0000
Received: from cartman.offog.org ([2001:8b0:83b:b53f::a])
 by a-painless.mh.aa.net.uk with esmtps
 (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92)
 (envelope-from <ats@offog.org>)
 id 1kWgay-0001oV-R0; Sun, 25 Oct 2020 14:02:04 +0000
Received: from ats by cartman.offog.org with local (Exim 4.94)
 (envelope-from <ats@offog.org>)
 id 1kWgao-0007UQ-4s; Sun, 25 Oct 2020 14:01:54 +0000
From: Adam Sampson <ats@offog.org>
To: linux-sunxi@googlegroups.com, devicetree@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: sun7i: pcduino3-nano: enable RGMII RX/TX delay on
 PHY
Date: Sun, 25 Oct 2020 14:01:44 +0000
Message-Id: <20201025140144.28693-1-ats@offog.org>
X-Mailer: git-send-email 2.29.1
MIME-Version: 1.0
X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 
X-CRM114-CacheID: sfid-20201025_100205_812453_7FAF68C8 
X-CRM114-Status: GOOD (  13.85  )
X-BeenThere: linux-arm-kernel@lists.infradead.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <linux-arm-kernel.lists.infradead.org>
List-Unsubscribe: 
 <http://lists.infradead.org/mailman/options/linux-arm-kernel>,
 <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/>
List-Post: <mailto:linux-arm-kernel@lists.infradead.org>
List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help>
List-Subscribe: 
 <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>,
 <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe>
Cc: Adam Sampson <ats@offog.org>
Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org>
Errors-To: 
 linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org

The RX/TX delays for the Ethernet PHY on the Linksprite pcDuino 3 Nano
are configured in hardware, using resistors that are populated to pull
the RTL8211E's RXDLY/TXDLY pins low or high as needed.

phy-mode should be set to rgmii-id to reflect this. Previously it was
set to rgmii, which used to work but now results in the delays being
disabled again as a result of the bugfix in commit bbc4d71d6354 ("net:
phy: realtek: fix rtl8211e rx/tx delay config").

Tested on two pcDuino 3 Nano boards purchased in 2015. Without this fix,
Ethernet works unreliably on one board and doesn't work at all on the
other.

Fixes: 061035d456c9 ("ARM: dts: sun7i: Add dts file for pcDuino 3 Nano board")
Signed-off-by: Adam Sampson <ats@offog.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts
index fce2f7fcd084..bf38c66c1815 100644
--- a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts
+++ b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Adam Sampson <ats@offog.org>
+ * Copyright 2015-2020 Adam Sampson <ats@offog.org>
  *
  * This file is dual-licensed: you can use it either under the terms
  * of the GPL or the X11 license, at your option. Note that this dual
@@ -115,7 +115,7 @@ &gmac {
 	pinctrl-names = "default";
 	pinctrl-0 = <&gmac_rgmii_pins>;
 	phy-handle = <&phy1>;
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	status = "okay";
 };