linux-kernel - [PATCHv3] arm64: dts: stratix10: Add QSPI support for Stratix10

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Date:   Tue, 15 May 2018 17:26:27 -0500
From:   thor.thayer@...ux.intel.com
To:     dinguyen@...nel.org, robh+dt@...nel.org, mark.rutland@....com
Cc:     catalin.marinas@....com, will.deacon@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Thor Thayer <thor.thayer@...ux.intel.com>
Subject: [PATCHv3] arm64: dts: stratix10: Add QSPI support for Stratix10

From: Thor Thayer <thor.thayer@...ux.intel.com>

Add qspi_clock
   The qspi_clk frequency is updated by U-Boot before starting Linux.
Add QSPI interface node.
Add QSPI flash memory child node.
   Setup the QSPI memory in 2 partitions.

Signed-off-by: Thor Thayer <thor.thayer@...ux.intel.com>
---
v2  s/_/-/ in qspi-clk
    rename flash node.
    use partition child node notation
v3  remove unused bus-num node
    use device id from table (n25q00a)
---
 arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi  | 21 +++++++++++++
 .../boot/dts/altera/socfpga_stratix10_socdk.dts    | 35 ++++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi b/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
index e6b059378dc0..d8c94d5ff4b4 100644
--- a/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
+++ b/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
@@ -119,6 +119,12 @@
 				#clock-cells = <0>;
 				compatible = "fixed-clock";
 			};
+
+			qspi_clk: qspi-clk {
+				#clock-cells = <0>;
+				compatible = "fixed-clock";
+				clock-frequency = <200000000>;
+			};
 		};
 
 		gmac0: ethernet@...00000 {
@@ -466,5 +472,20 @@
 				interrupts = <16 4>, <48 4>;
 			};
 		};
+
+		qspi: spi@...d2000 {
+			compatible = "cdns,qspi-nor";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0xff8d2000 0x100>,
+			      <0xff900000 0x100000>;
+			interrupts = <0 3 4>;
+			cdns,fifo-depth = <128>;
+			cdns,fifo-width = <4>;
+			cdns,trigger-address = <0x00000000>;
+			clocks = <&qspi_clk>;
+
+			status = "disabled";
+		};
 	};
 };
diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
index f9b1ef12db48..6edc4fa9fd42 100644
--- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
+++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
@@ -147,3 +147,38 @@
 		reg = <0x68>;
 	};
 };
+
+&qspi {
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "n25q00a";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		m25p,fast-read;
+		cdns,page-size = <256>;
+		cdns,block-size = <16>;
+		cdns,read-delay = <1>;
+		cdns,tshsl-ns = <50>;
+		cdns,tsd2d-ns = <50>;
+		cdns,tchsh-ns = <4>;
+		cdns,tslch-ns = <4>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			qspi_boot: partition@0 {
+				label = "Boot and fpga data";
+				reg = <0x0 0x4000000>;
+			};
+
+			qspi_rootfs: partition@...0000 {
+				label = "Root Filesystem - JFFS2";
+				reg = <0x4000000 0x4000000>;
+			};
+		};
+	};
+};
-- 
2.7.4