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tty: serial: msm_serial: document DT alias

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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 <frank.rowand@sonymobile.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Frank Rowand 2014-11-14 14:07:15 -08:00 • committed by Greg Kroah-Hartman
parent 7920408b0c
commit bbac3297c6
1 changed files with 44 additions and 19 deletions
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29
Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
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@ -27,9 +27,14 @@ Optional properties:
- dmas: Should contain dma specifiers for transmit and receive channels - dmas: Should contain dma specifiers for transmit and receive channels
- dma-names: Should contain "tx" for transmit and "rx" for 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: Examples:
A uartdm v1.4 device with dma capabilities. - A uartdm v1.4 device with dma capabilities.
serial@f991e000 { serial@f991e000 {
compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm"; compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
@ -41,7 +46,7 @@ serial@f991e000 {
dma-names = "tx", "rx"; 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 { serial@19c40000 {
compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm"; compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm";
@ -51,3 +56,23 @@ serial@19c40000 {
clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>; clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>;
clock-names = "core", "iface"; 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";
};