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dts: rx: renesas: Add SPI support on RX261 #99740

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dts: rx: renesas: Add SPI support on RX261 #99740

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2ff01d9
dts: renesas: rx: Add dts property node for SPI support on RX261
Nov 18, 2025
dbcc855
boards: renesas: Add SPI support for EK-RX261 board
Nov 18, 2025
6e97968
boards: renesas: Add SPI support for FPB-RX261 board
Nov 18, 2025
98fc517
tests: drivers: spi: Add overlay file for spi_loopback test
Nov 18, 2025
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9 changes: 9 additions & 0 deletions boards/renesas/ek_rx261/ek_rx261-pinctrl.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -11,4 +11,13 @@
<RX_PSEL(RX_PSEL_SCI_6, 11, 0)>; /* RX */
};
};

rspi0_default: rspi0_default {
group1 {
psels = <RX_PSEL(RX_PSEL_PAnPFS_RSPCKA, 10, 5)>,
<RX_PSEL(RX_PSEL_PAnPFS_MOSIA, 10, 6)>,
<RX_PSEL(RX_PSEL_PAnPFS_MISOA, 10, 7)>,
<RX_PSEL(RX_PSEL_PAnPFS_SSLA0, 10, 4)>;
};
};
};
7 changes: 7 additions & 0 deletions boards/renesas/ek_rx261/ek_rx261.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -95,3 +95,10 @@
status = "okay";
};
};

&rspi0 {
pinctrl-0 = <&rspi0_default>;
pinctrl-names = "default";
ssl-assert = <0>;
status = "okay";
};
9 changes: 9 additions & 0 deletions boards/renesas/fpb_rx261/fpb_rx261-pinctrl.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -11,4 +11,13 @@
<RX_PSEL(RX_PSEL_SCI_5, 0xC, 0x2)>; /* RX */
};
};

rspi0_default: rspi0_default {
group1 {
psels = <RX_PSEL(RX_PSEL_PAnPFS_RSPCKA, 10, 5)>,
<RX_PSEL(RX_PSEL_PAnPFS_MOSIA, 10, 6)>,
<RX_PSEL(RX_PSEL_PAnPFS_MISOA, 10, 7)>,
<RX_PSEL(RX_PSEL_PAnPFS_SSLA0, 10, 4)>;
};
};
};
7 changes: 7 additions & 0 deletions boards/renesas/fpb_rx261/fpb_rx261.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -84,3 +84,10 @@
status = "okay";
};
};

&rspi0 {
pinctrl-0 = <&rspi0_default>;
pinctrl-names = "default";
ssl-assert = <0>;
status = "okay";
};
12 changes: 12 additions & 0 deletions dts/rx/renesas/rx261-common.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -509,6 +509,18 @@
interrupt-names = "cmi";
status = "disabled";
};

rspi0: spi@88380 {
compatible = "renesas,rx-rspi";
#address-cells = <1>;
#size-cells = <0>;
reg = <0x00088380 0x100>;
channel = <0>;
clocks = <&pclkb MSTPB 17>;
interrupts = <44 1>, <45 1>, <46 1>, <47 1>;
interrupt-names = "spei", "spri", "spti", "spii";
status = "disabled";
};
};

ofsm: ofsm@ffffff80 {
Expand Down
18 changes: 18 additions & 0 deletions tests/drivers/spi/spi_loopback/boards/ek_rx261.overlay
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
/*
* Copyright (c) 2025 Renesas Electronics Corporation
* SPDX-License-Identifier: Apache-2.0
*/

&rspi0 {
slow@0 {
compatible = "test-spi-loopback-slow";
reg = <0>;
spi-max-frequency = <1000000>;
};

fast@0 {
compatible = "test-spi-loopback-fast";
reg = <0>;
spi-max-frequency = <3000000>;
};
};
18 changes: 18 additions & 0 deletions tests/drivers/spi/spi_loopback/boards/fpb_rx261.overlay
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
/*
* Copyright (c) 2025 Renesas Electronics Corporation
* SPDX-License-Identifier: Apache-2.0
*/

&rspi0 {
slow@0 {
compatible = "test-spi-loopback-slow";
reg = <0>;
spi-max-frequency = <1000000>;
};

fast@0 {
compatible = "test-spi-loopback-fast";
reg = <0>;
spi-max-frequency = <3000000>;
};
};