MCP23017 is an IO expander offering 16 input/output port expander with
interrupt output.
On stm32mp135f-dk, only INTA is routed (on PG12), but MCP23017 can mirror
the bank B interrupts on INTA, that's why the property microchip,irq-mirror
is used.
Signed-off-by: Amelie Delaunay <amelie.delaunay@xxxxxxxxxxx>
---
arch/arm/boot/dts/stm32mp135f-dk.dts | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/arm/boot/dts/stm32mp135f-dk.dts b/arch/arm/boot/dts/stm32mp135f-dk.dts
index a87ab067c955..d5fc6462ba33 100644
--- a/arch/arm/boot/dts/stm32mp135f-dk.dts
+++ b/arch/arm/boot/dts/stm32mp135f-dk.dts
@@ -112,6 +112,20 @@ &i2c1 {
/* spare dmas for other usage */
/delete-property/dmas;
/delete-property/dma-names;
+
+ mcp23017: pinctrl@21 {
+ compatible = "microchip,mcp23017";
+ reg = <0x21>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
+ interrupt-parent = <&gpiog>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcp23017_pins_a>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ microchip,irq-mirror;
+ };
};
&i2c5 {
--
2.25.1
