[PATCH v4 3/6] dt-bindings: mvebu-uart: document DT bindings for marvell,armada-3700-uart-clock
From: Pali Rohár <pali@kernel.org>
Date: 2021-08-02 14:46:03
Also in:
linux-arm-kernel, linux-serial, lkml
Subsystem:
common clk framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This change adds DT bindings documentation for device nodes with compatible string "marvell,armada-3700-uart-clock". Signed-off-by: Pali Rohár <pali@kernel.org> --- .../bindings/clock/armada3700-uart-clock.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/armada3700-uart-clock.yaml
diff --git a/Documentation/devicetree/bindings/clock/armada3700-uart-clock.yaml b/Documentation/devicetree/bindings/clock/armada3700-uart-clock.yaml
new file mode 100644
index 000000000000..5ef04f3affda
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/armada3700-uart-clock.yaml@@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/marvell,armada-3700-uart-clock# +$schema: http://devicetree.org/meta-schemas/core.yaml# +title: Marvell Armada 3720 UART clocks +properties: + compatible: + const: marvell,armada-3700-uart-clock + reg: + items: + - description: UART Clock Control Register + - description: UART 2 Baud Rate Divisor Register + clocks: + description: | + List of parent clocks suitable for UART from following set: + "TBG-A-P", "TBG-B-P", "TBG-A-S", "TBG-B-S", "xtal" + UART clock can use one from this set and when more are provided + then kernel would choose and configure the most suitable one. + It is suggest to specify at least one TBG clock to achieve + baudrates above 230400 and also to specify clock which bootloader + used for UART (most probably xtal) for smooth boot log on UART. + clock-names: + items: + - const: TBG-A-P + - const: TBG-B-P + - const: TBG-A-S + - const: TBG-B-S + - const: xtal + minItems: 1 + maxItems: 5 + '#clock-cells': + const: 1 +required: + - compatible + - reg + - clocks + - clock-names + - '#clock-cells' +additionalProperties: false +examples: + - | + uartclk: uartclk@12000 { + compatible = "marvell,armada-3700-uart-clock"; + reg = <0x12010 0x4>, <0x12210 0x4>; + clocks = <&tbg 0>, <&tbg 1>, <&tbg 2>, <&tbg 3>, <&xtalclk>; + clock-names = "TBG-A-P", "TBG-B-P", "TBG-A-S", "TBG-B-S", "xtal"; + #clock-cells = <1>; + };
--
2.20.1