From bbac3297c6712f061853e3e11d5e21aa4164968f Mon Sep 17 00:00:00 2001 From: Frank Rowand Date: Fri, 14 Nov 2014 14:07:15 -0800 Subject: 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: Frank Rowand Signed-off-by: Greg Kroah-Hartman --- .../devicetree/bindings/serial/qcom,msm-uartdm.txt | 69 +++++++++++++++------- 1 file changed, 47 insertions(+), 22 deletions(-) (limited to 'Documentation/devicetree/bindings/serial') diff --git a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt index ffa5b784c66e..a2114c217376 100644 --- a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt +++ b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt @@ -27,27 +27,52 @@ 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. - -serial@f991e000 { - compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm"; - reg = <0xf991e000 0x1000>; - interrupts = <0 108 0x0>; - clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>; - clock-names = "core", "iface"; - dmas = <&dma0 0>, <&dma0 1>; - dma-names = "tx", "rx"; -}; - -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"; - reg = <0x19c40000 0x1000>, - <0x19c00000 0x1000>; - interrupts = <0 195 0x0>; - clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>; - clock-names = "core", "iface"; -}; +- A uartdm v1.4 device with dma capabilities. + + serial@f991e000 { + compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm"; + reg = <0xf991e000 0x1000>; + interrupts = <0 108 0x0>; + clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>; + clock-names = "core", "iface"; + dmas = <&dma0 0>, <&dma0 1>; + dma-names = "tx", "rx"; + }; + +- 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"; + reg = <0x19c40000 0x1000>, + <0x19c00000 0x1000>; + interrupts = <0 195 0x0>; + 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"; + }; -- cgit v1.2.3-59-g8ed1b