From ac40fe537c3b0c9d518466d5735ea17ea2d639ff Mon Sep 17 00:00:00 2001
From: Aaro Koskinen <aaro.koskinen@iki.fi>
Date: Wed, 2 Jan 2019 20:43:01 +0200
Subject: [PATCH] MIPS: OCTEON: mark RGMII interface disabled on OCTEON III
commit edefae94b7b9f10d5efe32dece5a36e9d9ecc29e upstream.
Commit 885872b722b7 ("MIPS: Octeon: Add Octeon III CN7xxx
interface detection") added RGMII interface detection for OCTEON III,
but it results in the following logs:
[ 7.165984] ERROR: Unsupported Octeon model in __cvmx_helper_rgmii_probe
[ 7.173017] ERROR: Unsupported Octeon model in __cvmx_helper_rgmii_probe
The current RGMII routines are valid only for older OCTEONS that
use GMX/ASX hardware blocks. On later chips AGL should be used,
but support for that is missing in the mainline. Until that is added,
mark the interface as disabled.
Fixes: 885872b722b7 ("MIPS: Octeon: Add Octeon III CN7xxx interface detection")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: stable@vger.kernel.org # 4.7+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/cavium-octeon/executive/cvmx-helper.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper.c b/arch/mips/cavium-octeon/executive/cvmx-helper.c
index c683c369bca5..c376f17e142c 100644
--- a/arch/mips/cavium-octeon/executive/cvmx-helper.c
+++ b/arch/mips/cavium-octeon/executive/cvmx-helper.c
@@ -286,7 +286,8 @@ static cvmx_helper_interface_mode_t __cvmx_get_mode_cn7xxx(int interface)
case 3:
return CVMX_HELPER_INTERFACE_MODE_LOOP;
case 4:
- return CVMX_HELPER_INTERFACE_MODE_RGMII;
+ /* TODO: Implement support for AGL (RGMII). */
+ return CVMX_HELPER_INTERFACE_MODE_DISABLED;
default:
return CVMX_HELPER_INTERFACE_MODE_DISABLED;
}