bindings/serial/serial.yaml

1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10   - Rob Herring <robh@kernel.org>
11   - Greg Kroah-Hartman <gregkh@linuxfoundation.org>
18   Each enabled UART may have an optional "serialN" alias in the "aliases" node,
19   where N is the port number (non-negative decimal integer) as printed on the
28   cts-gpios:
32       the UART's CTS line.
34   dcd-gpios:
38       the UART's DCD line.
40   dsr-gpios:
44       the UART's DSR line.
46   dtr-gpios:
50       the UART's DTR line.
52   rng-gpios:
56       the UART's RNG line.
58   rts-gpios:
62       the UART's RTS line.
64   uart-has-rtscts:
67       The presence of this property indicates that the UART has dedicated lines
70       UART hardware and the board wiring.
72   rx-tx-swap:
76   cts-rts-swap:
80   rx-threshold:
85   tx-threshold:
92     - uart-has-rtscts
95     cts-gpios: false
96     rts-gpios: false
104         Serial attached devices shall be a child node of the host UART device
106         device is the only child node of the UART device. The slave device node
114         max-speed:
119             device can support.  For example, a particular board has some
123         current-speed:
127             This should only be present in case a driver has no chance to know
130               * device supports auto-baud
137         - compatible
142   - |
149             compatible = "brcm,bcm4330-bt";
150             interrupt-parent = <&gpio>;