mt7621-qtn-rgmii: enable RGMII connected Quantenna QV840

Write a magic value to a magic destination.  This might
be specific to the Mitrastar designed ZyXEL WAP6805.

Signed-off-by: Bjørn Mork <bjorn@mork.no>

1 files changed, 45 insertions, 0 deletions

diff --git a/package/kernel/mt7621-qtn-rgmii/Makefile b/package/kernel/mt7621-qtn-rgmii/Makefile
new file mode 100644
index 0000000000..f5587f5363
--- /dev/null
+++ b/package/kernel/mt7621-qtn-rgmii/Makefile
@@ -0,0 +1,45 @@
+#
+# Copyright (C) 2020 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:=mt7621-qtn-rgmii
+PKG_RELEASE:=1
+PKG_LICENSE:=GPL-2.0
+
+PKG_MAINTAINER:=Bjørn Mork <bjorn@mork.no>
+
+include $(INCLUDE_DIR)/package.mk
+
+define KernelPackage/mt7621-qtn-rgmii
+  SECTION:=kernel
+  SUBMENU:=Other modules
+  TITLE:=Enable RGMII connected Quantenna module on MT7621
+  DEPENDS:=@TARGET_ramips_mt7621
+  HIDDEN:=1
+  FILES:=$(PKG_BUILD_DIR)/mt7621-qtn-rgmii.ko
+  AUTOLOAD:=$(call AutoLoad,30,mt7621-qtn-rgmii,1)
+endef
+
+define KernelPackage/mt7621-qtn-rgmii/description
+  Enable RGMII connected Quantenna module on MT7621.
+
+  The Mitrastar designed ZyXEL WAP6805 has a Quantenna QV840
+  module connected to the RGMII pins of the MT7621 SoC. For
+  unknown reasons, it is necessary to change the value of
+  the register at 0x1e110008 from default (usually 0xc000c)
+  to 0x9000c for this connection wo work.
+
+  This driver simply does that without much fuzz.
+endef
+
+define Build/Compile
+        $(KERNEL_MAKE) M=$(PKG_BUILD_DIR) modules
+endef
+
+$(eval $(call KernelPackage,mt7621-qtn-rgmii))