linux-kernel - [PATCH v3 1/1] riscv: dts: thead: add basic spi node

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Message-ID: <20240705093503.215787-2-kanakshilledar@gmail.com>
Date: Fri,  5 Jul 2024 15:04:59 +0530
From: Kanak Shilledar <kanakshilledar@...il.com>
To: 
Cc: Kanak Shilledar <kanakshilledar@...il.com>,
	Jisheng Zhang <jszhang@...nel.org>,
	Guo Ren <guoren@...nel.org>,
	Fu Wei <wefu@...hat.com>,
	Conor Dooley <conor@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Drew Fustini <drew@...7.com>
Subject: [PATCH v3 1/1] riscv: dts: thead: add basic spi node

created spi0 node with fixed clock. the spi0 node
uses synopsis designware driver and has the following
compatible "snps,dw-apb-ssi". the spi0 node is connected
to a SPI NOR flash pad which is left unpopulated on the back
side of the board.

Acked-by: Drew Fustini <drew@...7.com>
Signed-off-by: Kanak Shilledar <kanakshilledar@...il.com>
---
Changes in v3:
- Changed the position of "spi" to come after "serial" in
aliases for both the boards.
- Added Acked-by tag.
Changes in v2:
- Separated from a single patch file.
---
 .../boot/dts/thead/th1520-beaglev-ahead.dts      |  9 +++++++++
 .../boot/dts/thead/th1520-lichee-module-4a.dtsi  |  4 ++++
 .../riscv/boot/dts/thead/th1520-lichee-pi-4a.dts |  5 +++++
 arch/riscv/boot/dts/thead/th1520.dtsi            | 16 ++++++++++++++++
 4 files changed, 34 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
index d9b4de9e4757..b4d2e1d69bdb 100644
--- a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
+++ b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
@@ -23,6 +23,7 @@ aliases {
 		serial3 = &uart3;
 		serial4 = &uart4;
 		serial5 = &uart5;
+		spi0 = &spi0;
 	};
 
 	chosen {
@@ -52,6 +53,10 @@ &sdhci_clk {
 	clock-frequency = <198000000>;
 };
 
+&spi_clk {
+	clock-frequency = <396000000>;
+};
+
 &uart_sclk {
 	clock-frequency = <100000000>;
 };
@@ -79,3 +84,7 @@ &sdio0 {
 &uart0 {
 	status = "okay";
 };
+
+&spi0 {
+	status = "okay";
+};
diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-module-4a.dtsi b/arch/riscv/boot/dts/thead/th1520-lichee-module-4a.dtsi
index 1365d3a512a3..6939bd36560c 100644
--- a/arch/riscv/boot/dts/thead/th1520-lichee-module-4a.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520-lichee-module-4a.dtsi
@@ -33,6 +33,10 @@ &sdhci_clk {
 	clock-frequency = <198000000>;
 };
 
+&spi_clk {
+	clock-frequency = <396000000>;
+};
+
 &uart_sclk {
 	clock-frequency = <100000000>;
 };
diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
index 9a3884a73e13..7738d2895c5a 100644
--- a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
+++ b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
@@ -20,6 +20,7 @@ aliases {
 		serial3 = &uart3;
 		serial4 = &uart4;
 		serial5 = &uart5;
+		spi0 = &spi0;
 	};
 
 	chosen {
@@ -30,3 +31,7 @@ chosen {
 &uart0 {
 	status = "okay";
 };
+
+&spi0 {
+	status = "okay";
+};
diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index d2fa25839012..f962de663e7e 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -140,6 +140,12 @@ apb_clk: apb-clk-clock {
 		#clock-cells = <0>;
 	};
 
+	spi_clk: spi-clock {
+		compatible = "fixed-clock";
+		clock-output-names = "spi_clk";
+		#clock-cells = <0>;
+	};
+
 	uart_sclk: uart-sclk-clock {
 		compatible = "fixed-clock";
 		clock-output-names = "uart_sclk";
@@ -183,6 +189,16 @@ clint: timer@...c000000 {
 					      <&cpu3_intc 3>, <&cpu3_intc 7>;
 		};
 
+		spi0: spi@...700c000 {
+			compatible = "thead,th1520-spi", "snps,dw-apb-ssi";
+			reg = <0xff 0xe700c000 0x0 0x1000>;
+			interrupts = <54 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&spi_clk>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
 		uart0: serial@...7014000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0xff 0xe7014000 0x0 0x100>;
-- 
2.45.2