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Message-ID: <20200818021752.GA2147074@bogus>
Date: Mon, 17 Aug 2020 20:17:52 -0600
From: Rob Herring <robh@...nel.org>
To: Anson Huang <Anson.Huang@....com>
Cc: mturquette@...libre.com, sboyd@...nel.org, shawnguo@...nel.org,
s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
gregkh@...uxfoundation.org, galak@...eaurora.org,
linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-serial@...r.kernel.org, Linux-imx@....com
Subject: Re: [PATCH V2 4/5] dt-bindings: serial: Convert MXS auart to
json-schema
On Wed, Aug 12, 2020 at 04:51:23PM +0800, Anson Huang wrote:
> Convert the MXS auart binding to DT schema format using json-schema.
>
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> changes since V1:
> - update examples to align with i.MX23/i.MX28 clock bindings;
> - add minItem to clocks/clock-names property as i.MX23/i.MX28 have optional clocks
> property with one item.
> ---
> .../devicetree/bindings/serial/fsl-mxs-auart.txt | 53 -------------
> .../devicetree/bindings/serial/fsl-mxs-auart.yaml | 91 ++++++++++++++++++++++
> 2 files changed, 91 insertions(+), 53 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> create mode 100644 Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
>
> diff --git a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> deleted file mode 100644
> index 5c96d41..0000000
> --- a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> +++ /dev/null
> @@ -1,53 +0,0 @@
> -* Freescale MXS Application UART (AUART)
> -
> -Required properties for all SoCs:
> -- compatible : Should be one of fallowing variants:
> - "fsl,imx23-auart" - Freescale i.MX23
> - "fsl,imx28-auart" - Freescale i.MX28
> - "alphascale,asm9260-auart" - Alphascale ASM9260
> -- reg : Address and length of the register set for the device
> -- interrupts : Should contain the auart interrupt numbers
> -- dmas: DMA specifier, consisting of a phandle to DMA controller node
> - and AUART DMA channel ID.
> - Refer to dma.txt and fsl-mxs-dma.txt for details.
> -- dma-names: "rx" for RX channel, "tx" for TX channel.
> -
> -Required properties for "alphascale,asm9260-auart":
> -- clocks : the clocks feeding the watchdog timer. See clock-bindings.txt
> -- clock-names : should be set to
> - "mod" - source for tick counter.
> - "ahb" - ahb gate.
> -
> -Optional properties:
> -- uart-has-rtscts : Indicate the UART has RTS and CTS lines
> - for hardware flow control,
> - it also means you enable the DMA support for this UART.
> -- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD
> - line respectively. It will use specified PIO instead of the peripheral
> - function pin for the USART feature.
> - If unsure, don't specify this property.
> -
> -Example:
> -auart0: serial@...6a000 {
> - compatible = "fsl,imx28-auart", "fsl,imx23-auart";
> - reg = <0x8006a000 0x2000>;
> - interrupts = <112>;
> - dmas = <&dma_apbx 8>, <&dma_apbx 9>;
> - dma-names = "rx", "tx";
> - cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
> - dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
> - dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
> -};
> -
> -Note: Each auart port should have an alias correctly numbered in "aliases"
> -node.
> -
> -Example:
> -
> -aliases {
> - serial0 = &auart0;
> - serial1 = &auart1;
> - serial2 = &auart2;
> - serial3 = &auart3;
> - serial4 = &auart4;
> -};
> diff --git a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
> new file mode 100644
> index 0000000..5c4fa75
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
> @@ -0,0 +1,91 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/serial/fsl-mxs-auart.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale MXS Application UART (AUART)
> +
> +maintainers:
> + - Kumar Gala <galak@...eaurora.org>
Why is Kumar maintainer and that's a really old email address?
> +
> +allOf:
> + - $ref: "serial.yaml"
> +
> +properties:
> + compatible:
> + enum:
> + - fsl,imx23-auart
> + - fsl,imx28-auart
> + - alphascale,asm9260-auart
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + dmas:
> + items:
> + - description: DMA controller phandle and request line for RX
> + - description: DMA controller phandle and request line for TX
> +
> + dma-names:
> + items:
> + - const: rx
> + - const: tx
> +
> + clocks:
> + items:
> + - description: mod clock
> + - description: ahb clock
> + minItems: 1
> +
> + clock-names:
> + items:
> + - const: mod
> + - const: ahb
> + minItems: 1
> +
> + uart-has-rtscts: true
> + rts-gpios: true
> + cts-gpios: true
> + dtr-gpios: true
> + dsr-gpios: true
> + rng-gpios: true
> + dcd-gpios: true
> +
> +if:
> + properties:
> + compatible:
> + contains:
> + enum:
> + - alphascale,asm9260-auart
> +then:
> + required:
> + - clocks
> + - clock-names
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - dmas
> + - dma-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + aliases {
> + serial0 = &auart0;
> + };
> +
> + auart0: serial@...6a000 {
> + compatible = "fsl,imx28-auart";
> + reg = <0x8006a000 0x2000>;
> + interrupts = <112>;
> + dmas = <&dma_apbx 8>, <&dma_apbx 9>;
> + dma-names = "rx", "tx";
> + clocks = <&clks 45>;
> + };
> --
> 2.7.4
>
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