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Message-ID: <20210527165636.939-1-vigneshr@ti.com>
Date: Thu, 27 May 2021 22:26:36 +0530
From: Vignesh Raghavendra <vigneshr@...com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>
CC: Vignesh Raghavendra <vigneshr@...com>,
<linux-serial@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH] dt-bindings: serial: Move omap-serial.txt to YAML schema
Convert serial-omap.txt to YAML schema for better checks and documentation.
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
---
.../bindings/serial/omap_serial.txt | 40 ------
.../bindings/serial/ti,omap4-uart.yaml | 116 ++++++++++++++++++
2 files changed, 116 insertions(+), 40 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/serial/omap_serial.txt
create mode 100644 Documentation/devicetree/bindings/serial/ti,omap4-uart.yaml
diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt
deleted file mode 100644
index c2db8cabf2ab..000000000000
--- a/Documentation/devicetree/bindings/serial/omap_serial.txt
+++ /dev/null
@@ -1,40 +0,0 @@
-OMAP UART controller
-
-Required properties:
-- compatible : should be "ti,am64-uart", "ti,am654-uart" for AM64 controllers
-- compatible : should be "ti,j721e-uart", "ti,am654-uart" for J721E controllers
-- compatible : should be "ti,am654-uart" for AM654 controllers
-- compatible : should be "ti,omap2-uart" for OMAP2 controllers
-- compatible : should be "ti,omap3-uart" for OMAP3 controllers
-- compatible : should be "ti,omap4-uart" for OMAP4 controllers
-- compatible : should be "ti,am4372-uart" for AM437x controllers
-- compatible : should be "ti,am3352-uart" for AM335x controllers
-- compatible : should be "ti,dra742-uart" for DRA7x controllers
-- reg : address and length of the register space
-- interrupts or interrupts-extended : Should contain the uart interrupt
- specifier or both the interrupt
- controller phandle and interrupt
- specifier.
-- ti,hwmods : Must be "uart<n>", n being the instance number (1-based)
-
-Optional properties:
-- clock-frequency : frequency of the clock input to the UART
-- dmas : DMA specifier, consisting of a phandle to the DMA controller
- node and a DMA channel number.
-- dma-names : "rx" for receive channel, "tx" for transmit channel.
-- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
-- rs485-rts-active-high: drive RTS high when sending (default is low).
-- clocks: phandle to the functional clock as per
- Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-Example:
-
- uart4: serial@...42000 {
- compatible = "ti,omap3-uart";
- reg = <0x49042000 0x400>;
- interrupts = <80>;
- dmas = <&sdma 81 &sdma 82>;
- dma-names = "tx", "rx";
- ti,hwmods = "uart4";
- clock-frequency = <48000000>;
- };
diff --git a/Documentation/devicetree/bindings/serial/ti,omap4-uart.yaml b/Documentation/devicetree/bindings/serial/ti,omap4-uart.yaml
new file mode 100644
index 000000000000..b3e426c24a9e
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/ti,omap4-uart.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/ti,omap4-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for 8250 compliant UARTs on TI's OMAP and K3 SoCs
+
+maintainers:
+ - Vignesh Raghavendra <vigneshr@...com>
+
+allOf:
+ - $ref: /schemas/serial/serial.yaml#
+ - $ref: /schemas/serial/rs485.yaml#
+
+properties:
+ compatible:
+ oneOf:
+ - enum:
+ - ti,am3352-uart
+ - ti,am4372-uart
+ - ti,am654-uart
+ - ti,dra742-uart
+ - ti,omap2-uart
+ - ti,omap3-uart
+ - ti,omap4-uart
+ - items:
+ - enum:
+ - ti,am64-uart
+ - ti,j721e-uart
+ - const: ti,am654-uart
+
+ ti,hwmods:
+ description:
+ Must be "uart<n>", n being the instance number (1-based)
+ This property is applicable only on legacy platforms mainly omap2/3
+ and ti81xx and should not be used on other platforms.
+ $ref: /schemas/types.yaml#/definitions/string
+ deprecated: true
+
+ dmas:
+ minItems: 1
+ maxItems: 2
+
+ dma-names:
+ items:
+ - const: tx
+ - const: rx
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 2
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ const: fclk
+
+ reg-shift:
+ const: 2
+ reg-io-width:
+ const: 4
+
+ rts-gpios: true
+ cts-gpios: true
+ dtr-gpios: true
+ dsr-gpios: true
+ rng-gpios: true
+ dcd-gpios: true
+ rs485-rts-delay: true
+ rs485-rts-active-low: true
+ rs485-rx-during-tx: true
+ rs485-rts-active-high: true
+ linux,rs485-enabled-at-boot-time: true
+ rts-gpio: true
+ power-domains: true
+ clock-frequency: true
+ current-speed: true
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+additionalProperties: false
+
+if:
+ properties:
+ compatible:
+ oneOf:
+ - const: ti,omap2-uart
+ - const: ti,omap3-uart
+ - const: ti,omap4-uart
+
+then:
+ properties:
+ ti,hwmods:
+ items:
+ - pattern: "^uart([1-9])$"
+
+else:
+ properties:
+ ti,hwmods: false
+
+examples:
+ - |
+ uart4: serial@...42000 {
+ compatible = "ti,omap3-uart";
+ reg = <0x49042000 0x400>;
+ interrupts = <80>;
+ clock-frequency = <48000000>;
+ };
--
2.31.1
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