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riscv: dts: thead: add basic spi node

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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@pdp7.com>
Signed-off-by: Kanak Shilledar <kanakshilledar@gmail.com>
Signed-off-by: Drew Fustini <drew@pdp7.com>
This commit is contained in:
Kanak Shilledar 2024-07-05 15:04:59 +05:30 • committed by Drew Fustini
parent 8400291e28
commit 32121e1584
4 changed files with 34 additions and 0 deletions
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9
arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
View file

@ -23,6 +23,7 @@
serial3 = &uart3;
serial4 = &uart4;
serial5 = &uart5;
spi0 = &spi0;
};
chosen {
@ -52,6 +53,10 @@
clock-frequency = <198000000>;
};
&spi_clk {
clock-frequency = <396000000>;
};
&uart_sclk {
clock-frequency = <100000000>;
};
@ -79,3 +84,7 @@
&uart0 {
status = "okay";
};
&spi0 {
status = "okay";
};

4
arch/riscv/boot/dts/thead/th1520-lichee-module-4a.dtsi
View file

@ -33,6 +33,10 @@
clock-frequency = <198000000>;
};
&spi_clk {
clock-frequency = <396000000>;
};
&uart_sclk {
clock-frequency = <100000000>;
};

5
arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
View file

@ -20,6 +20,7 @@
serial3 = &uart3;
serial4 = &uart4;
serial5 = &uart5;
spi0 = &spi0;
};
chosen {
@ -30,3 +31,7 @@
&uart0 {
status = "okay";
};
&spi0 {
status = "okay";
};

16
arch/riscv/boot/dts/thead/th1520.dtsi
View file

@ -221,6 +221,12 @@
#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";
@ -264,6 +270,16 @@
<&cpu3_intc 3>, <&cpu3_intc 7>;
};
spi0: spi@ffe700c000 {
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@ffe7014000 {
compatible = "snps,dw-apb-uart";
reg = <0xff 0xe7014000 0x0 0x100>;