linux-kernel - [PATCH 1/2] ARC: [plat-axs10x]: DTS: Add reset controller node to manage ethernet reset

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Date:   Tue, 14 Nov 2017 17:32:13 +0300
From:   Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
To:     linux-snps-arc@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Subject: [PATCH 1/2] ARC: [plat-axs10x]: DTS: Add reset controller node to manage ethernet reset

DW ethernet controller on axs10x hangs sometimes after SW reset, so
add reset node to make possible to reset DW ethernet controller HW.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
---
 arch/arc/boot/dts/axs10x_mb.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
index e114000..74d070c 100644
--- a/arch/arc/boot/dts/axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/axs10x_mb.dtsi
@@ -16,6 +16,12 @@
 		ranges = <0x00000000 0x0 0xe0000000 0x10000000>;
 		interrupt-parent = <&mb_intc>;
 
+		creg_rst: reset-controller@...20 {
+			compatible = "snps,axs10x-reset";
+			#reset-cells = <1>;
+			reg = <0x11220 0x4>;
+		};
+
 		i2sclk: i2sclk@...a0 {
 			compatible = "snps,axs10x-i2s-pll-clock";
 			reg = <0x100a0 0x10>;
@@ -73,6 +79,8 @@
 			clocks = <&apbclk>;
 			clock-names = "stmmaceth";
 			max-speed = <100>;
+			resets = <&creg_rst 5>;
+			reset-names = "stmmaceth";
 		};
 
 		ehci@...0000 {
-- 
2.9.3