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Message-ID: <20250507020325.3407521-1-robh@kernel.org>
Date: Tue, 6 May 2025 21:03:21 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Pali Rohár <pali@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jirislaby@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org,
linux-serial@...r.kernel.org,
devicetree@...r.kernel.org
Subject: [PATCH v2] dt-bindings: serial: Convert marvell,armada-3700-uart to DT schema
Convert the Marvell Armada-3700 UART binding to DT schema. It is a
straight-forward conversion.
Drop the long deprecated single interrupt support.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
v2:
- Drop deprecated part of interrupt description
- fix subject
---
.../serial/marvell,armada-3700-uart.yaml | 102 ++++++++++++++++++
.../devicetree/bindings/serial/mvebu-uart.txt | 56 ----------
MAINTAINERS | 2 +-
3 files changed, 103 insertions(+), 57 deletions(-)
create mode 100644 Documentation/devicetree/bindings/serial/marvell,armada-3700-uart.yaml
delete mode 100644 Documentation/devicetree/bindings/serial/mvebu-uart.txt
diff --git a/Documentation/devicetree/bindings/serial/marvell,armada-3700-uart.yaml b/Documentation/devicetree/bindings/serial/marvell,armada-3700-uart.yaml
new file mode 100644
index 000000000000..231e1e9d1d72
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/marvell,armada-3700-uart.yaml
@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/marvell,armada-3700-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell Armada-3700 UART
+
+maintainers:
+ - Pali Rohár <pali@...nel.org>
+
+description:
+ Marvell UART is a non standard UART used in some of Marvell EBU SoCs (e.g.
+ Armada-3700).
+
+properties:
+ compatible:
+ enum:
+ - marvell,armada-3700-uart
+ - marvell,armada-3700-uart-ext
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+ description:
+ UART reference clock used to derive the baud rate. If absent, only fixed
+ baud rate from the bootloader is supported.
+
+ interrupts:
+ minItems: 2
+ items:
+ - description: UART sum interrupt
+ - description: UART TX interrupt
+ - description: UART RX interrupt
+
+ interrupt-names:
+ minItems: 2
+ maxItems: 3
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-names
+
+unevaluatedProperties: false
+
+allOf:
+ - $ref: /schemas/serial.yaml#
+ - if:
+ properties:
+ compatible:
+ const: marvell,armada-3700-uart-ext
+ then:
+ properties:
+ interrupts:
+ maxItems: 2
+
+ interrupt-names:
+ items:
+ - const: uart-tx
+ - const: uart-rx
+ else:
+ properties:
+ interrupts:
+ minItems: 3
+
+ interrupt-names:
+ items:
+ - const: uart-sum
+ - const: uart-tx
+ - const: uart-rx
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ serial@...00 {
+ compatible = "marvell,armada-3700-uart";
+ reg = <0x12000 0x18>;
+ clocks = <&uartclk 0>;
+ interrupts =
+ <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "uart-sum", "uart-tx", "uart-rx";
+ };
+
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ serial@...00 {
+ compatible = "marvell,armada-3700-uart-ext";
+ reg = <0x12200 0x30>;
+ clocks = <&uartclk 1>;
+ interrupts =
+ <GIC_SPI 30 IRQ_TYPE_EDGE_RISING>,
+ <GIC_SPI 31 IRQ_TYPE_EDGE_RISING>;
+ interrupt-names = "uart-tx", "uart-rx";
+ };
diff --git a/Documentation/devicetree/bindings/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
deleted file mode 100644
index a062bbca532c..000000000000
--- a/Documentation/devicetree/bindings/serial/mvebu-uart.txt
+++ /dev/null
@@ -1,56 +0,0 @@
-* Marvell UART : Non standard UART used in some of Marvell EBU SoCs
- e.g., Armada-3700.
-
-Required properties:
-- compatible:
- - "marvell,armada-3700-uart" for the standard variant of the UART
- (32 bytes FIFO, no DMA, level interrupts, 8-bit access to the
- FIFO), called also UART1.
- - "marvell,armada-3700-uart-ext" for the extended variant of the
- UART (128 bytes FIFO, DMA, front interrupts, 8-bit or 32-bit
- accesses to the FIFO), called also UART2.
-- reg: offset and length of the register set for the device.
-- clocks: UART reference clock used to derive the baudrate. If no clock
- is provided (possible only with the "marvell,armada-3700-uart"
- compatible string for backward compatibility), it will only work
- if the baudrate was initialized by the bootloader and no baudrate
- change will then be possible. When provided it should be UART1-clk
- for standard variant of UART and UART2-clk for extended variant
- of UART. TBG clock (with UART TBG divisors d1=d2=1) or xtal clock
- should not be used and are supported only for backward compatibility.
-- interrupts:
- - Must contain three elements for the standard variant of the IP
- (marvell,armada-3700-uart): "uart-sum", "uart-tx" and "uart-rx",
- respectively the UART sum interrupt, the UART TX interrupt and
- UART RX interrupt. A corresponding interrupt-names property must
- be defined.
- - Must contain two elements for the extended variant of the IP
- (marvell,armada-3700-uart-ext): "uart-tx" and "uart-rx",
- respectively the UART TX interrupt and the UART RX interrupt. A
- corresponding interrupt-names property must be defined.
- - For backward compatibility reasons, a single element interrupts
- property is also supported for the standard variant of the IP,
- containing only the UART sum interrupt. This form is deprecated
- and should no longer be used.
-
-Example:
- uart0: serial@...00 {
- compatible = "marvell,armada-3700-uart";
- reg = <0x12000 0x18>;
- clocks = <&uartclk 0>;
- interrupts =
- <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
- interrupt-names = "uart-sum", "uart-tx", "uart-rx";
- };
-
- uart1: serial@...00 {
- compatible = "marvell,armada-3700-uart-ext";
- reg = <0x12200 0x30>;
- clocks = <&uartclk 1>;
- interrupts =
- <GIC_SPI 30 IRQ_TYPE_EDGE_RISING>,
- <GIC_SPI 31 IRQ_TYPE_EDGE_RISING>;
- interrupt-names = "uart-tx", "uart-rx";
- };
diff --git a/MAINTAINERS b/MAINTAINERS
index 96b827049501..8b1306c14380 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14254,7 +14254,7 @@ MARVELL ARMADA 3700 SERIAL DRIVER
M: Pali Rohár <pali@...nel.org>
S: Maintained
F: Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml
-F: Documentation/devicetree/bindings/serial/mvebu-uart.txt
+F: Documentation/devicetree/bindings/serial/marvell,armada-3700-uart.yaml
F: drivers/tty/serial/mvebu-uart.c
MARVELL ARMADA DRM SUPPORT
--
2.47.2
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