[PATCH 2/5] dt-bindings: serial: uartlite: Add properties for synthesis-time parameters
From: Sean Anderson <hidden>
Date: 2021-07-23 22:32:11
Also in:
linux-devicetree
Subsystem:
open firmware and flattened device tree bindings, the rest, tty layer and serial drivers · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
The uartlite device is a "soft" device. Many parameters, such as baud rate, data bits, and the presence of a parity bit are configured before synthesis and may not be changed (or discovered) at runtime. However, we must know what these settings are in order to properly calculate the uart timeout (and to inform the user about the actual baud of the uart). These properties are present for out-of-tree bindings generated by Xilinx's tools. However, they are also (mostly) present in in-tree bindings. I chose current-speed over xlnx,baudrate primarily because it seemed to be used by more existing bindings. Signed-off-by: Sean Anderson <redacted> --- .../bindings/serial/xlnx,opb-uartlite.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml
index 4ef29784ae97..28859e70e60f 100644
--- a/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml
+++ b/Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml@@ -32,13 +32,49 @@ properties: clock-names: const: s_axi_aclk + current-speed: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + The fixed baud rate that the device was configured for. + + xlnx,data-bits: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [5, 6, 7, 8] + default: 8 + description: + The fixed number of data bits that the device was configured for. + + xlnx,use-parity: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + default: 0 + description: + Whether parity checking was enabled when the device was configured. + + xlnx,odd-parity: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + description: + Whether odd parity was configured. + required: - compatible - reg - interrupts + - current-speed + - xlnx,data-bits + - xlnx,use-parity allOf: - $ref: /schemas/serial.yaml# + - if: + properties: + xlnx,use-parity: + contains: + const: 1 + then: + required: + - xlnx,odd-parity additionalProperties: true
@@ -49,5 +85,8 @@ examples: reg = <0x800c0000 0x10000>; interrupts = <0x0 0x6e 0x1>; port-number = <0>; + current-speed = <115200>; + xlnx,data-bits = <8>; + xlnx,use-parity = <0>; }; ...
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2.25.1