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Commit bbac3297 authored by Frank Rowand's avatar Frank Rowand Committed by Greg Kroah-Hartman
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tty: serial: msm_serial: document DT alias 



Update devicetree binding for msm_serial to reflect msm_serial_probe()
getting line id (port number) from the serialN alias.

Signed-off-by: default avatarFrank Rowand <frank.rowand@sonymobile.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7920408b

Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt

+47 −22
Original line number Diff line number Diff line
@@ -27,9 +27,14 @@ Optional properties: 
- dmas: Should contain dma specifiers for transmit and receive channels

- dma-names: Should contain "tx" for transmit and "rx" for receive channels



Note: Aliases may be defined to ensure the correct ordering of the UARTs.

The alias serialN will result in the UART being assigned port N.  If any

serialN alias exists, then an alias must exist for each enabled UART.  The

serialN aliases should be in a .dts file instead of in a .dtsi file.



Examples:



A uartdm v1.4 device with dma capabilities.

- A uartdm v1.4 device with dma capabilities.



	serial@f991e000 {

		compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
@@ -41,7 +46,7 @@ serial@f991e000 { 
		dma-names = "tx", "rx";

	};



A uartdm v1.3 device without dma capabilities and part of a GSBI complex.

- A uartdm v1.3 device without dma capabilities and part of a GSBI complex.



	serial@19c40000 {

		compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm";
@@ -51,3 +56,23 @@ serial@19c40000 { 
		clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>;

		clock-names = "core", "iface";

	};



- serialN alias.



	aliases {

		serial0 = &uarta;

		serial1 = &uartc;

		serial2 = &uartb;

	};



	uarta: serial@12490000 {

		status = "ok";

	};



	uartb: serial@16340000 {

		status = "ok";

	};



	uartc: serial@1a240000 {

		status = "ok";

	};