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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/gpio/gpio-ts4900.txt
parentInitial commit. (diff)
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Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+* Technologic Systems I2C-FPGA's GPIO controller bindings
+
+This bindings describes the GPIO controller for Technologic's FPGA core.
+TS-4900's FPGA encodes the GPIO state on 3 bits, whereas the TS-7970's FPGA
+uses 2 bits: it doesn't use a dedicated input bit.
+
+Required properties:
+- compatible: Should be one of the following
+ "technologic,ts4900-gpio"
+ "technologic,ts7970-gpio"
+- reg: Physical base address of the controller and length
+ of memory mapped region.
+- #gpio-cells: Should be two. The first cell is the pin number.
+- gpio-controller: Marks the device node as a gpio controller.
+
+Optional property:
+- ngpios: Number of GPIOs this controller is instantiated with,
+ the default is 32. See gpio.txt for more details.
+
+Example:
+
+&i2c2 {
+ gpio8: gpio@28 {
+ compatible = "technologic,ts4900-gpio";
+ reg = <0x28>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ ngpios = <32>;
+ };
+};