Squashed 'dts/upstream/' content from commit aaba2d45dc2a
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diff --git a/Bindings/serial/st,stm32-uart.yaml b/Bindings/serial/st,stm32-uart.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+maintainers:
+ - Erwan Le Ray <erwan.leray@foss.st.com>
+
+title: STMicroelectronics STM32 USART
+
+properties:
+ compatible:
+ enum:
+ - st,stm32-uart
+ - st,stm32f7-uart
+ - st,stm32h7-uart
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ label:
+ description: label associated with this uart
+
+ st,hw-flow-ctrl:
+ description: enable hardware flow control (deprecated)
+ $ref: /schemas/types.yaml#/definitions/flag
+
+ rx-tx-swap: true
+
+ dmas:
+ minItems: 1
+ maxItems: 2
+
+ dma-names:
+ items:
+ enum: [ rx, tx ]
+ minItems: 1
+ maxItems: 2
+
+# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts'
+# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow
+# control instead of dedicated pins.
+#
+# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or
+# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design.
+ cts-gpios: true
+ rts-gpios: true
+
+ wakeup-source: true
+
+ rx-threshold:
+ description:
+ If value is set to 1, RX FIFO threshold is disabled.
+ enum: [1, 2, 4, 8, 12, 14, 16]
+ default: 8
+
+ tx-threshold:
+ description:
+ If value is set to 1, TX FIFO threshold is disabled.
+ enum: [1, 2, 4, 8, 12, 14, 16]
+ default: 8
+
+allOf:
+ - $ref: rs485.yaml#
+ - $ref: serial.yaml#
+ - if:
+ required:
+ - st,hw-flow-ctrl
+ then:
+ properties:
+ cts-gpios: false
+ rts-gpios: false
+ - if:
+ properties:
+ compatible:
+ const: st,stm32-uart
+ then:
+ properties:
+ rx-tx-swap: false
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - st,stm32-uart
+ - st,stm32f7-uart
+ then:
+ properties:
+ rx-threshold: false
+ tx-threshold: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/stm32mp1-clks.h>
+ usart1: serial@40011000 {
+ compatible = "st,stm32h7-uart";
+ reg = <0x40011000 0x400>;
+ interrupts = <37>;
+ clocks = <&rcc 0 164>;
+ dmas = <&dma2 2 4 0x414 0x0>,
+ <&dma2 7 4 0x414 0x0>;
+ dma-names = "rx", "tx";
+ rx-threshold = <4>;
+ tx-threshold = <4>;
+ rs485-rts-active-low;
+ };
+
+...