| From fba4075b8b42f6bc778148c334fdc92bf4ef95a2 Mon Sep 17 00:00:00 2001 |
| From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com> |
| Date: Wed, 1 Feb 2017 09:42:03 +0100 |
| Subject: [PATCH 011/286] arm64: dts: r8a7796: Use rgmii-txid phy-mode for |
| EthernetAVB |
| |
| Since commit 61fccb2d6274 ("ravb: Add tx and rx clock internal delays mode |
| of APSR") the EthernetAVB driver enables tx and rx clock internal delay |
| modes (TDM and RDM) depending on the phy mode as follows: |
| |
| phy mode | ASPR delay mode |
| -----------+---------------- |
| rgmii-id | TDM and RDM |
| rgmii-rxid | RDM |
| rgmii-txid | TDM |
| |
| And prior to the above commit no internal delay mode settings were |
| implemented for any phy mode. |
| |
| With this and the above change present tx internal delay mode is enabled |
| which has been observed to address failures in the case of 1Gbps |
| communication using the by salvator-x board with the KSZ9031RNX phy. This |
| has been reported to occur with both the r8a7795 (H3) and r8a7796 (M3-W) |
| SoCs. |
| |
| With the above patch present but this patch present tx and rx internal |
| delay modes are enabled; and with the above patch and this present absent |
| no internal delay modes are enabled. In both cases failures have been |
| observed when using 1Gbps communication in the environments described |
| above. |
| |
| Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com> |
| Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com> |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| (cherry picked from commit 325f39010b431f6a1ece74d69f10dcca2329c08d) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| arch/arm64/boot/dts/renesas/r8a7796.dtsi | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi |
| +++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi |
| @@ -483,7 +483,7 @@ |
| "ch24"; |
| clocks = <&cpg CPG_MOD 812>; |
| power-domains = <&sysc R8A7796_PD_ALWAYS_ON>; |
| - phy-mode = "rgmii-id"; |
| + phy-mode = "rgmii-txid"; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| status = "disabled"; |