(kernel-rolling) can: Add Phytium CAN controller support

Documentation/devicetree/bindings/net/can/phytium,can.yaml

@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/phytium,can.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title:
+  Phytium CAN controller
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+properties:
+  compatible:
+    enum:
+      - phytium,can
+      - phytium,canfd
+
+  reg:
+    maxItems: 1
+    description: Should contain the controller registers location and length
+
+  interrupts:
+    maxItems: 1
+    description: Should contain IRQ line for the controller
+
+  clocks:
+    maxItems: 1
+    description: Input clock used by the controller
+
+  clock-names:
+    maxItems: 1
+    description: Input clock name, should be "can_clk"
+    const: can_clk
+
+  tx-fifo-depth:
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    description: Indicates the length of TX FIFO
+
+  rx-fifo-depth:
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    description: Indicates the length of RX FIFO
+
+  extend_brp:
+    description: |
+      Indicates to apply the extend BRP parameter of bit timming for
+      early version of CAN controller
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - tx-fifo-depth
+  - rx-fifo-depth
+
+allOf:
+  - $ref: can-controller.yaml#
+
+examples:
+  - |
+
+    can0: can@2800a000 {
+      compatible = "phytium,canfd";
+      reg = <0x0 0x2800a000 0x0 0x1000>;
+      interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&sysclk_600mhz>;
+      clock-names = "can_clk";
+      tx-fifo-depth = <64>;
+      rx-fifo-depth = <64>;
+    };

drivers/net/can/Kconfig

@@ -222,6 +222,7 @@ source "drivers/net/can/ifi_canfd/Kconfig"
 source "drivers/net/can/m_can/Kconfig"
 source "drivers/net/can/mscan/Kconfig"
 source "drivers/net/can/peak_canfd/Kconfig"
+source "drivers/net/can/phytium/Kconfig"
 source "drivers/net/can/rcar/Kconfig"
 source "drivers/net/can/sja1000/Kconfig"
 source "drivers/net/can/softing/Kconfig"

drivers/net/can/Makefile

@@ -31,5 +31,5 @@ obj-$(CONFIG_CAN_SJA1000)	+= sja1000/
 obj-$(CONFIG_CAN_SUN4I)		+= sun4i_can.o
 obj-$(CONFIG_CAN_TI_HECC)	+= ti_hecc.o
 obj-$(CONFIG_CAN_XILINXCAN)	+= xilinx_can.o
-
+obj-$(CONFIG_CAN_PHYTIUM)	+= phytium/
 subdir-ccflags-$(CONFIG_CAN_DEBUG_DEVICES) += -DDEBUG

drivers/net/can/phytium/Kconfig

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menuconfig CAN_PHYTIUM
+	tristate "Phytium CAN support"
+	help
+	  Say Y here if you want support for Phytium CAN controller framework.
+	  This is common support for devices that embed the Phytium CAN IP.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called phytium_can.
+
+if CAN_PHYTIUM
+
+config CAN_PHYTIUM_PLATFORM
+	tristate "Phytium CAN support for io-mapped devices"
+	depends on HAS_IOMEM
+	help
+	  Say Y here is you want to support for IO Mapped Phytium CAN controller.
+	  This support is for devices that have the Phytium CAN controller IP
+	  embedded into the device and the IP is IO Mapped to the processor.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called phytium_can_platform.
+
+config CAN_PHYTIUM_PCI
+	tristate "Phytium CAN support for PCI devices"
+	depends on PCI
+	help
+	  Say Y here is you want to support for Phytium CAN controller connected
+	  to the PCI bus. This support is for devices that have the Phytium CAN
+	  controller IP embedded into a PCI device.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called phytium_can_pci.
+endif

drivers/net/can/phytium/Makefile

@@ -0,0 +1,8 @@
+#
+# Makefile for the Phytium CAN controller drivers.
+#
+#
+
+obj-$(CONFIG_CAN_PHYTIUM) += phytium_can.o
+obj-$(CONFIG_CAN_PHYTIUM_PLATFORM) += phytium_can_platform.o
+obj-$(CONFIG_CAN_PHYTIUM_PCI) += phytium_can_pci.o