mediatek: bpi-r64: use dt-overlay to select SATA or PCIE1

The Bananapi BPi-R64 got a SATA interface which cannot be used at the
same time as the second mPCIe slot. The decission is made by hogging
GPIO 90.
Embed two addtional DT overlay blobs into the image to allow bootloader
selection of either SATA or PCIE1 feature.

Signed-off-by: Daniel Golle <[email protected]>

target/linux/mediatek/Makefile

@@ -6,7 +6,7 @@ ARCH:=arm
 BOARD:=mediatek
 BOARDNAME:=MediaTek Ralink ARM
 SUBTARGETS:=mt7622 mt7623 mt7629
-FEATURES:=squashfs nand separate_ramdisk fpu
+FEATURES:=squashfs nand separate_ramdisk fpu dt-overlay
 
 KERNEL_PATCHVER:=5.4
 KERNEL_TESTING_PATCHVER:=5.10

target/linux/mediatek/image/mt7622.mk

@@ -73,6 +73,7 @@ define Device/bananapi_bpi-r64
   DEVICE_VENDOR := Bananapi
   DEVICE_MODEL := BPi-R64
   DEVICE_DTS := mt7622-bananapi-bpi-r64
+  DEVICE_DTS_OVERLAY := mt7622-bananapi-bpi-r64-pcie1 mt7622-bananapi-bpi-r64-sata
   DEVICE_PACKAGES := kmod-ata-ahci-mtk kmod-btmtkuart kmod-usb3 e2fsprogs mkf2fs f2fsck
   ARTIFACTS := sdcard.img
   IMAGES := sysupgrade.itb

target/linux/mediatek/patches-5.10/900-dts-mt7622-bpi-r64-aliases-for-dtoverlay.patch

@@ -0,0 +1,80 @@
+--- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
++++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
+@@ -279,14 +279,14 @@
+ &pcie1 {
+ 	pinctrl-names = "default";
+ 	pinctrl-0 = <&pcie1_pins>;
+-	status = "okay";
++	status = "disabled";
+ };
+ 
+ &pio {
+ 	/* Attention: GPIO 90 is used to switch between PCIe@1,0 and
+ 	 * SATA functions. i.e. output-high: PCIe, output-low: SATA
+ 	 */
+-	asm_sel {
++	asmsel: asm_sel {
+ 		gpio-hog;
+ 		gpios = <90 GPIO_ACTIVE_HIGH>;
+ 		output-high;
+--- /dev/null
++++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64-sata.dts
+@@ -0,0 +1,31 @@
++/* SPDX-License-Identifier: (GPL-2.0-only OR MIT) */
++
++#include <dt-bindings/gpio/gpio.h>
++
++/dts-v1/;
++/plugin/;
++
++/ {
++	compatible = "bananapi,bpi-r64", "mediatek,mt7622";
++
++	fragment@0 {
++		target = <&asmsel>;
++		__overlay__ {
++			gpios = <90 GPIO_ACTIVE_LOW>;
++		};
++	};
++
++	fragment@1 {
++		target = <&sata>;
++		__overlay__ {
++			status = "okay";
++		};
++	};
++
++	fragment@2 {
++		target = <&sata_phy>;
++		__overlay__ {
++			status = "okay";
++		};
++	};
++};
+--- /dev/null
++++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64-pcie1.dts
+@@ -0,0 +1,24 @@
++/* SPDX-License-Identifier: (GPL-2.0-only OR MIT) */
++
++#include <dt-bindings/gpio/gpio.h>
++
++/dts-v1/;
++/plugin/;
++
++/ {
++	compatible = "bananapi,bpi-r64", "mediatek,mt7622";
++
++	fragment@0 {
++		target = <&asmsel>;
++		__overlay__ {
++			gpios = <90 GPIO_ACTIVE_HIGH>;
++		};
++	};
++
++	fragment@1 {
++		target = <&pcie1>;
++		__overlay__ {
++			status = "okay";
++		};
++	};
++};