From 4df7e9a13953f95c3970d7a1fa97f8bc16f83a37 Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Thu, 8 Aug 2019 10:51:38 +0200 Subject: [PATCH] dt-bindings: serial: meson-uart: convert to yaml Now that we have the DT validation in place, let's convert the device tree bindings for the Amlogic UART Serial controller over to a YAML schemas. Reviewed-by: Rob Herring Reviewed-by: Martin Blumenstingl Signed-off-by: Neil Armstrong Signed-off-by: Rob Herring --- .../bindings/serial/amlogic,meson-uart.txt | 38 ---------- .../bindings/serial/amlogic,meson-uart.yaml | 73 +++++++++++++++++++ 2 files changed, 73 insertions(+), 38 deletions(-) delete mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt create mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt deleted file mode 100644 index c06c045126fc..000000000000 --- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt +++ /dev/null @@ -1,38 +0,0 @@ -Amlogic Meson SoC UART Serial Interface -======================================= - -The Amlogic Meson SoC UART Serial Interface is present on a large range -of SoCs, and can be present either in the "Always-On" power domain or the -"Everything-Else" power domain. - -The particularity of the "Always-On" Serial Interface is that the hardware -is active since power-on and does not need any clock gating and is usable -as very early serial console. - -Required properties: -- compatible : compatible: value should be different for each SoC family as : - - Meson6 : "amlogic,meson6-uart" - - Meson8 : "amlogic,meson8-uart" - - Meson8b : "amlogic,meson8b-uart" - - GX (GXBB, GXL, GXM) : "amlogic,meson-gx-uart" - eventually followed by : "amlogic,meson-ao-uart" if this UART interface - is in the "Always-On" power domain. -- reg : offset and length of the register set for the device. -- interrupts : identifier to the device interrupt -- clocks : a list of phandle + clock-specifier pairs, one for each - entry in clock names. -- clock-names : - * "xtal" for external xtal clock identifier - * "pclk" for the bus core clock, either the clk81 clock or the gate clock - * "baud" for the source of the baudrate generator, can be either the xtal - or the pclk. - -e.g. -uart_A: serial@84c0 { - compatible = "amlogic,meson-gx-uart"; - reg = <0x0 0x84c0 0x0 0x14>; - interrupts = ; - /* Use xtal as baud rate clock source */ - clocks = <&xtal>, <&clkc CLKID_UART0>, <&xtal>; - clock-names = "xtal", "pclk", "baud"; -}; diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml new file mode 100644 index 000000000000..214fe8beddc3 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml @@ -0,0 +1,73 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2019 BayLibre, SAS +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/serial/amlogic,meson-uart.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Amlogic Meson SoC UART Serial Interface + +maintainers: + - Neil Armstrong + +description: | + The Amlogic Meson SoC UART Serial Interface is present on a large range + of SoCs, and can be present either in the "Always-On" power domain or the + "Everything-Else" power domain. + + The particularity of the "Always-On" Serial Interface is that the hardware + is active since power-on and does not need any clock gating and is usable + as very early serial console. + +properties: + compatible: + oneOf: + - description: Always-on power domain UART controller + items: + - enum: + - amlogic,meson6-uart + - amlogic,meson8-uart + - amlogic,meson8b-uart + - amlogic,meson-gx-uart + - const: amlogic,meson-ao-uart + - description: Everything-Else power domain UART controller + enum: + - amlogic,meson6-uart + - amlogic,meson8-uart + - amlogic,meson8b-uart + - amlogic,meson-gx-uart + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: external xtal clock identifier + - description: the bus core clock, either the clk81 clock or the gate clock + - description: the source of the baudrate generator, can be either the xtal or the pclk + + clock-names: + items: + - const: xtal + - const: pclk + - const: baud + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + +examples: + - | + serial@84c0 { + compatible = "amlogic,meson-gx-uart"; + reg = <0x84c0 0x14>; + interrupts = <26>; + clocks = <&xtal>, <&pclk>, <&xtal>; + clock-names = "xtal", "pclk", "baud"; + };