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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/i2c/i2c-aspeed.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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+Device tree configuration for the I2C busses on the AST24XX, AST25XX, and AST26XX SoCs.
+
+Required Properties:
+- #address-cells : should be 1
+- #size-cells : should be 0
+- reg : address offset and range of bus
+- compatible : should be "aspeed,ast2400-i2c-bus"
+ or "aspeed,ast2500-i2c-bus"
+ or "aspeed,ast2600-i2c-bus"
+- clocks : root clock of bus, should reference the APB
+ clock in the second cell
+- resets : phandle to reset controller with the reset number in
+ the second cell
+- interrupts : interrupt number
+
+Optional Properties:
+- bus-frequency : frequency of the bus clock in Hz defaults to 100 kHz when not
+ specified
+- multi-master : states that there is another master active on this bus.
+
+Example:
+
+i2c {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x1e78a000 0x1000>;
+
+ i2c_ic: interrupt-controller@0 {
+ #interrupt-cells = <1>;
+ compatible = "aspeed,ast2400-i2c-ic";
+ reg = <0x0 0x40>;
+ interrupts = <12>;
+ interrupt-controller;
+ };
+
+ i2c0: i2c-bus@40 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #interrupt-cells = <1>;
+ reg = <0x40 0x40>;
+ compatible = "aspeed,ast2400-i2c-bus";
+ clocks = <&syscon ASPEED_CLK_APB>;
+ resets = <&syscon ASPEED_RESET_I2C>;
+ bus-frequency = <100000>;
+ interrupts = <0>;
+ interrupt-parent = <&i2c_ic>;
+ };
+};