Merge branch 'mse102x-support'

Stefan Wahren says:

====================
add Vertexcom MSE102x support

This patch series adds support for the Vertexcom MSE102x Homeplug GreenPHY
chips [1]. They can be connected either via RGMII, RMII or SPI to a host CPU.
These patches handles only the last one, with an Ethernet over SPI protocol
driver.

The code has been tested only on Raspberry Pi boards, but should work
on other platforms.

Changes in V3:
- drop IF_PORT_HOMEPLUG again, since it's actually not used

Changes in V2:
- improve lock handling for RX & TX path
- add new patch to introduce IF_PORT_HOMEPLUG as suggested by Andrew Lunn
- address all the comments by Jakub Kicinski, Andrew Lunn, Kernel test robot

[1] - http://www.vertexcom.com/p_homeplug_plc_en.html
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/vertexcom-mse102x.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/net/vertexcom-mse102x.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: The Vertexcom MSE102x (SPI) Device Tree Bindings
+
+maintainers:
+  - Stefan Wahren <stefan.wahren@in-tech.com>
+
+description:
+  Vertexcom's MSE102x are a family of HomePlug GreenPHY chips.
+  They can be connected either via RGMII, RMII or SPI to a host CPU.
+
+  In order to use a MSE102x chip as SPI device, it must be defined as
+  a child of an SPI master device in the device tree.
+
+  More information can be found at
+    http://www.vertexcom.com/doc/MSE1022%20Product%20Brief.pdf
+
+allOf:
+  - $ref: ethernet-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - vertexcom,mse1021
+      - vertexcom,mse1022
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  spi-cpha: true
+
+  spi-cpol: true
+
+  spi-max-frequency:
+    minimum: 6000000
+    maximum: 7142857
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - spi-cpha
+  - spi-cpol
+  - spi-max-frequency
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ethernet@0 {
+            compatible = "vertexcom,mse1021";
+            reg = <0>;
+            interrupt-parent = <&gpio>;
+            interrupts = <23 IRQ_TYPE_EDGE_RISING>;
+            spi-cpha;
+            spi-cpol;
+            spi-max-frequency = <7142857>;
+        };
+    };

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1274,6 +1274,8 @@ patternProperties:
     description: Variscite Ltd.
   "^vdl,.*":
     description: Van der Laan b.v.
+  "^vertexcom,.*":
+    description: Vertexcom Technologies, Inc.
   "^via,.*":
     description: VIA Technologies, Inc.
   "^videostrong,.*":

drivers/net/ethernet/Kconfig

@@ -183,6 +183,7 @@ source "drivers/net/ethernet/tehuti/Kconfig"
 source "drivers/net/ethernet/ti/Kconfig"
 source "drivers/net/ethernet/toshiba/Kconfig"
 source "drivers/net/ethernet/tundra/Kconfig"
+source "drivers/net/ethernet/vertexcom/Kconfig"
 source "drivers/net/ethernet/via/Kconfig"
 source "drivers/net/ethernet/wiznet/Kconfig"
 source "drivers/net/ethernet/xilinx/Kconfig"

drivers/net/ethernet/Makefile

@@ -93,6 +93,7 @@ obj-$(CONFIG_NET_VENDOR_TEHUTI) += tehuti/
 obj-$(CONFIG_NET_VENDOR_TI) += ti/
 obj-$(CONFIG_NET_VENDOR_TOSHIBA) += toshiba/
 obj-$(CONFIG_NET_VENDOR_TUNDRA) += tundra/
+obj-$(CONFIG_NET_VENDOR_VERTEXCOM) += vertexcom/
 obj-$(CONFIG_NET_VENDOR_VIA) += via/
 obj-$(CONFIG_NET_VENDOR_WIZNET) += wiznet/
 obj-$(CONFIG_NET_VENDOR_XILINX) += xilinx/

drivers/net/ethernet/vertexcom/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Vertexcom network device configuration
+#
+
+config NET_VENDOR_VERTEXCOM
+	bool "Vertexcom devices"
+	default y
+	help
+	  If you have a network (Ethernet) card belonging to this class, say Y.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Vertexcom cards. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_VERTEXCOM
+
+config MSE102X
+	tristate "Vertexcom MSE102x SPI"
+	depends on SPI
+	help
+	  SPI driver for Vertexcom MSE102x SPI attached network chip.
+
+endif # NET_VENDOR_VERTEXCOM

drivers/net/ethernet/vertexcom/Makefile

+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Vertexcom network device drivers.
+#
+
+obj-$(CONFIG_MSE102X) += mse102x.o