ramips: add mt7621 hwcrypto engine support

package/lean/mtk-eip93/Makefile

@@ -0,0 +1,57 @@
+#
+# Copyright (C) 2006-2019 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=mtk-eip93
+PKG_RELEASE:=1.2
+
+PKG_SOURCE_URL:=https://github.com/vschagen/mtk-eip93.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_VERSION:=ae6492aba2388de54afa52700fcc21c3a6e6f1ad
+
+MAKE_PATH:=src
+
+include $(INCLUDE_DIR)/package.mk
+
+define KernelPackage/crypto-hw-eip93
+  SECTION:=kernel
+  CATEGORY:=Kernel modules
+  SUBMENU:=Cryptographic API modules
+  DEPENDS:= \
+	@TARGET_ramips_mt7621 \
+	+kmod-crypto-authenc \
+	+kmod-crypto-des \
+	+kmod-crypto-md5 \
+	+kmod-crypto-sha1 \
+	+kmod-crypto-sha256 \
+	@LINUX_5_4
+  KCONFIG:=
+  TITLE:=MTK EIP93 crypto module.
+  FILES:=$(PKG_BUILD_DIR)/src/crypto-hw-eip93.ko
+  AUTOLOAD:=$(call AutoProbe,crypto-hw-eip93)
+endef
+
+define KernelPackage/crypto-hw-eip93/description
+Kernel module to enable EIP-93 Crypto engine as found
+in the Mediatek MT7621 SoC.
+It enables DES/3DES/AES ECB/CBC/CTR and
+IPSEC offload with authenc(hmac(sha1/sha256), aes/cbc/rfc3686)
+endef
+
+MAKE_OPTS:= \
+	$(KERNEL_MAKE_FLAGS) \
+	M="$(PKG_BUILD_DIR)/src"
+
+define Build/Compile
+	$(MAKE) -C "$(LINUX_DIR)" \
+		$(MAKE_OPTS) \
+		modules
+endef
+
+$(eval $(call KernelPackage,crypto-hw-eip93))

target/linux/ramips/dts/mt7621.dtsi

@@ -442,6 +442,14 @@
 		clock-names = "nfi_clk";
 	};
 
+	crypto@1e004000 {
+		compatible = "mediatek,mtk-eip93";
+		reg = <0x1e004000 0x1000>;
+
+		interrupt-parent = <&gic>;
+		interrupts = <GIC_SHARED 19 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
 	ethsys: syscon@1e000000 {
 		compatible = "mediatek,mt7621-ethsys",
 			     "syscon";