Add driver for ehci in Sunplus SP7021

index 80eebc1..6c2faf3 100644
@@ -17947,6 +17947,12 @@ L:	[email protected]
 S:	Maintained
 F:	drivers/net/ethernet/dlink/sundance.c
 
+SUNPLUS USB EHCI DRIVER
+M:	Vincent Shih <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	drivers/usb/host/ehci-sunplus.c
+
 SUPERH
 M:	Yoshinori Sato <[email protected]>
 M:	Rich Felker <[email protected]>

index c4736d1..9728d3b 100644
@@ -339,6 +339,17 @@ config USB_OCTEON_EHCI
 	  USB 2.0 device support.  All CN6XXX based chips with USB are
 	  supported.
 
+config USB_EHCI_SUNPLUS
+	tristate "EHCI support for Sunplus USB controller"
+	depends on SOC_SP7021
+	select NVMEM_SUNPLUS_OCOTP
+	help
+	  Enables support for the on-chip EHCI controller in Sunplus
+	  SoCs. It supports 32-bit AHB/AXI config bus and 64-bit AXI
+	  data bus.
+	  This driver can also be built as a module. If so, the module
+	  will be called ehci-sunplus.
+
 endif # USB_EHCI_HCD
 
 config USB_OXU210HP_HCD

index 171de4d..7e9b5f1 100644
@@ -46,6 +46,7 @@ obj-$(CONFIG_USB_EHCI_HCD_STI)	+= ehci-st.o
 obj-$(CONFIG_USB_EHCI_EXYNOS)	+= ehci-exynos.o
 obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
 obj-$(CONFIG_USB_EHCI_BRCMSTB)	+= ehci-brcm.o
+obj-$(CONFIG_USB_EHCI_SUNPLUS)	+= ehci-sunplus.o
 
 obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
 obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o

new file mode 100644
index 0000000..e492f7a
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) Sunplus Co., Ltd. 2021
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/sunplus,sp7021-usb-ehci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sunplus SP7021 EHCI Device Tree bindings for ehci0/ehci1
+
+maintainers:
+  - Vincent Shih <[email protected]>
+
+allOf:
+  - $ref: usb-hcd.yaml#
+
+properties:
+  compatible:
+    enum:
+      - sunplus,sp7021-usb-ehci0
+      - sunplus,sp7021-usb-ehci1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: usbc_clk
+      - const: uphy_clk
+
+  resets:
+    maxItems: 2
+
+  reset-names:
+    items:
+      - const: usbc_rst
+      - const: uphy_rst
+
+  reg:
+    items:
+      - description: USBC register region
+      - description: UPHY register region
+      - description: MOON4 register region
+
+  reg-names:
+    items:
+      - const: usbc
+      - const: uphy
+      - const: moon4
+
+  interrupts:
+    maxItems: 1
+
+  nvmem-cell-names:
+    description: names corresponding to the nvmem cells of disconnect voltage
+    const: disc_vol
+
+  nvmem-cells:
+    description: nvmem cell address of disconnect voltage
+    maxItems: 1
+
+  port-num:
+    description:  identify ehci0 (port0) and ehci1 (port1)
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+  - reg
+  - reg-names
+  - interrupts
+  - nvmem-cell-names
+  - nvmem-cells
+  - port-num
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    sp_ehci0: usb@9c102100 {
+      compatible = "sunplus,sp7021-usb-ehci";
+      clocks = <&clkc 0x3a>, <&clkc 0x3d>;
+      clock-names = "usbc_clk", "uphy_clk";
+      resets = <&rstc 0x2a>, <&rstc 0x2d>;
+      reset-names = "usbc_rst", "uphy_rst";
+      reg = <0x9c102100 0x68>, <0x9c004a80 0x80>, <0x9c000200 0x80>;
+      reg-names = "usbc", "uphy", "moon4";
+      interrupt-parent = <&intc>;
+      interrupts = <14 IRQ_TYPE_LEVEL_HIGH>;
+      nvmem-cell-names = "disc_vol";
+      nvmem-cells = <&disc_vol>;
+      port-num = <0>;
+    };
+...

index 6c2faf3..49702c4 100644
@@ -17951,6 +17951,7 @@ SUNPLUS USB EHCI DRIVER
 M:	Vincent Shih <[email protected]>
 L:	[email protected]
 S:	Maintained
+F:	Documentation/devicetree/bindings/nvmem/sunplus,sp7021-ocotp.yaml
 F:	drivers/usb/host/ehci-sunplus.c
 
 SUPERH