linux-kernel - [PATCH 2/3] arm64: dts: bitmain: Add reset controller support for BM1880 SoC

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Date:   Thu, 25 Apr 2019 18:25:07 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     p.zabel@...gutronix.de, robh+dt@...nel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        haitao.suo@...main.com, darren.tsao@...main.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 2/3] arm64: dts: bitmain: Add reset controller support for BM1880 SoC

Add reset controller support for Bitmain BM1880 SoC. This SoC has two
reset controllers, each controlling reset lines of different peripherals.
This commit also adds reset support to UART peripherals.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 arch/arm64/boot/dts/bitmain/bm1880.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/bitmain/bm1880.dtsi b/arch/arm64/boot/dts/bitmain/bm1880.dtsi
index fdfdc65d29ef..37ecb760a2d2 100644
--- a/arch/arm64/boot/dts/bitmain/bm1880.dtsi
+++ b/arch/arm64/boot/dts/bitmain/bm1880.dtsi
@@ -5,6 +5,7 @@
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/reset/bitmain,bm1880-reset.h>
 
 / {
 	compatible = "bitmain,bm1880";
@@ -92,6 +93,18 @@
 				compatible = "bitmain,bm1880-pinctrl";
 				reg = <0x50 0x4B0>;
 			};
+
+			clk_rst: reset-controller@800 {
+				compatible = "bitmain,bm1880-reset";
+				reg = <0x800 0x8>;
+				#reset-cells = <1>;
+			};
+
+			rst: reset-controller@C00 {
+				compatible = "bitmain,bm1880-reset";
+				reg = <0xC00 0x8>;
+				#reset-cells = <1>;
+			};
 		};
 
 		uart0: serial@...18000 {
@@ -100,6 +113,7 @@
 			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
+			resets = <&rst BM1880_RST_UART0_1_CLK>;
 			status = "disabled";
 		};
 
@@ -109,6 +123,7 @@
 			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
+			resets = <&rst BM1880_RST_UART0_1_ACLK>;
 			status = "disabled";
 		};
 
@@ -118,6 +133,7 @@
 			interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
+			resets = <&rst BM1880_RST_UART2_3_CLK>;
 			status = "disabled";
 		};
 
@@ -127,6 +143,7 @@
 			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
+			resets = <&rst BM1880_RST_UART2_3_ACLK>;
 			status = "disabled";
 		};
 	};
-- 
2.17.1