| Message ID | 20170525064925.16867-4-brendanhiggins@google.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Wed, May 24, 2017 at 11:49:23PM -0700, Brendan Higgins wrote: > Added device tree binding documentation for Aspeed I2C busses. > > Signed-off-by: Brendan Higgins <brendanhiggins@google.com> > --- > Changes for v2: > - None > Changes for v3: > - Removed reference to "bus" device tree param > Changes for v4: > - None > Changes for v5: > - None > Changes for v6: > - Replaced the controller property with and interrupt controller, leaving only > the busses in the I2C documentation. > Changes for v7: > - Changed clock-frequency to bus-frequency in device tree > Changes for v8: > - Added multi-master property to device tree > --- > .../devicetree/bindings/i2c/i2c-aspeed.txt | 48 ++++++++++++++++++++++ > 1 file changed, 48 insertions(+) > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-aspeed.txt Acked-by: Rob Herring <robh@kernel.org> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt b/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt new file mode 100644 index 000000000000..bd6480b19535 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-aspeed.txt @@ -0,0 +1,48 @@ +Device tree configuration for the I2C busses on the AST24XX and AST25XX 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" +- clocks : root clock of bus, should reference the APB + clock +- interrupts : interrupt number +- interrupt-parent : interrupt controller for bus, should reference a + aspeed,ast2400-i2c-ic or aspeed,ast2500-i2c-ic + interrupt controller + +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 = <&clk_apb>; + bus-frequency = <100000>; + interrupts = <0>; + interrupt-parent = <&i2c_ic>; + }; +};
Added device tree binding documentation for Aspeed I2C busses. Signed-off-by: Brendan Higgins <brendanhiggins@google.com> --- Changes for v2: - None Changes for v3: - Removed reference to "bus" device tree param Changes for v4: - None Changes for v5: - None Changes for v6: - Replaced the controller property with and interrupt controller, leaving only the busses in the I2C documentation. Changes for v7: - Changed clock-frequency to bus-frequency in device tree Changes for v8: - Added multi-master property to device tree --- .../devicetree/bindings/i2c/i2c-aspeed.txt | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-aspeed.txt