Merge branch 'newsoc/axiado' into soc/newsoc

Support for the AX3000 SoC, from Harshit Shah <hshah@axiado.com>:

The AX3000 is a multi-core system-on-chip featuring four ARM Cortex-A53
cores, secure vault, hardware firewall, and AI acceleration engines. This
initial support enables basic bring-up of the SoC and evaluation platform
with CPU, timer, UART, and I3C functionality.

The series begins by adding the "axiado" vendor prefix and compatible
strings for the SoC and board. It then introduces the device tree files
and minimal ARCH_AXIADO platform support in arm64.

* newsoc/axiado:
  MAINTAINERS: Add entry for Axiado
  arm64: defconfig: enable the Axiado family
  arm64: dts: axiado: Add initial support for AX3000 SoC and eval board
  arm64: add Axiado SoC family
  dt-bindings: i3c: cdns: add Axiado AX3000 I3C controller
  dt-bindings: serial: cdns: add Axiado AX3000 UART controller
  dt-bindings: gpio: cdns: add Axiado AX3000 GPIO variant
  dt-bindings: gpio: cdns: convert to YAML
  dt-bindings: arm: axiado: add AX3000 EVK compatible strings
  dt-bindings: vendor-prefixes: Add Axiado Corporation

Author: arndb

Documentation/devicetree/bindings/arm/axiado.yaml

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/axiado.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Axiado Platforms
+
+maintainers:
+  - Harshit Shah <hshah@axiado.com>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: AX3000 based boards
+        items:
+          - enum:
+              - axiado,ax3000-evk       # Axiado AX3000 Evaluation Board
+          - const: axiado,ax3000       # Axiado AX3000 SoC
+
+additionalProperties: true

Documentation/devicetree/bindings/gpio/cdns,gpio.txt

@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/cdns,gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence GPIO Controller
+
+maintainers:
+  - Jan Kotas <jank@cadence.com>
+
+properties:
+  compatible:
+    oneOf:
+      - const: cdns,gpio-r1p02
+      - items:
+          - enum:
+              - axiado,ax3000-gpio
+          - const: cdns,gpio-r1p02
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  ngpios:
+    minimum: 1
+    maximum: 32
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+    description: |
+      - First cell is the GPIO line number.
+      - Second cell is flags as defined in <dt-bindings/gpio/gpio.h>,
+        only GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW supported.
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 2
+    description: |
+      - First cell is the GPIO line number used as IRQ.
+      - Second cell is the trigger type, as defined in
+        <dt-bindings/interrupt-controller/irq.h>.
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - gpio-controller
+  - "#gpio-cells"
+
+if:
+  required: [interrupt-controller]
+then:
+  required:
+    - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    gpio0: gpio-controller@fd060000 {
+        compatible = "cdns,gpio-r1p02";
+        reg = <0xfd060000 0x1000>;
+        clocks = <&gpio_clk>;
+
+        interrupt-parent = <&gic>;
+        interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
+
+        gpio-controller;
+        #gpio-cells = <2>;
+
+        interrupt-controller;
+        #interrupt-cells = <2>;
+    };

Documentation/devicetree/bindings/gpio/cdns,gpio.yaml

@@ -14,7 +14,12 @@ allOf:
 
 properties:
   compatible:
-    const: cdns,i3c-master
+    oneOf:
+      - const: cdns,i3c-master
+      - items:
+          - enum:
+              - axiado,ax3000-i3c
+          - const: cdns,i3c-master
 
   reg:
     maxItems: 1

Documentation/devicetree/bindings/i3c/cdns,i3c-master.yaml

@@ -16,9 +16,10 @@ properties:
         items:
           - const: xlnx,xuartps
           - const: cdns,uart-r1p8
-      - description: UART controller for Zynq Ultrascale+ MPSoC
-        items:
-          - const: xlnx,zynqmp-uart
+      - items:
+          - enum:
+              - axiado,ax3000-uart
+              - xlnx,zynqmp-uart
           - const: cdns,uart-r1p12
 
   reg:

Documentation/devicetree/bindings/serial/cdns,uart.yaml

@@ -200,6 +200,8 @@ patternProperties:
     description: Shanghai Awinic Technology Co., Ltd.
   "^axentia,.*":
     description: Axentia Technologies AB
+  "^axiado,.*":
+    description: Axiado Corporation
   "^axis,.*":
     description: Axis Communications AB
   "^azoteq,.*":

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -2413,6 +2413,14 @@ F:	arch/arm/boot/dts/aspeed/
 F:	arch/arm/mach-aspeed/
 N:	aspeed
 
+ARM/AXIADO ARCHITECTURE
+M:	Harshit Shah <hshah@axiado.com>
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/arm/axiado.yaml
+F:	arch/arm64/boot/dts/axiado/
+N:	axiado
+
 ARM/AXM LSI SOC
 M:	Krzysztof Kozlowski <krzk@kernel.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)

MAINTAINERS

@@ -40,6 +40,12 @@ config ARCH_APPLE
 	  This enables support for Apple's in-house ARM SoC family, such
 	  as the Apple M1.
 
+config ARCH_AXIADO
+	bool "Axiado SoC Family"
+	select GPIOLIB
+	help
+	  This enables support for Axiado SoC family like AX3000
+
 menuconfig ARCH_BCM
 	bool "Broadcom SoC Support"
 

arch/arm64/Kconfig.platforms

@@ -9,6 +9,7 @@ subdir-y += amlogic
 subdir-y += apm
 subdir-y += apple
 subdir-y += arm
+subdir-y += axiado
 subdir-y += bitmain
 subdir-y += blaize
 subdir-y += broadcom

arch/arm64/boot/dts/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_AXIADO) += ax3000-evk.dtb