Add qtpy-rp2040 to TinyGo v0.25.0

targets/qtpy-rp2040-boot-stage2.S

@@ -0,0 +1,17 @@
+// Adafruit QT Py RP2040 Stage 2 Bootloader
+
+//
+// This file defines the parameters specific to the flash-chip found
+// on the Adafruit QT Py RP2040.  The generic implementation is in
+// rp2040-boot-stage2.S
+//
+
+#define BOARD_PICO_FLASH_SPI_CLKDIV   4
+#define BOARD_CMD_READ                0xe7
+#define BOARD_QUAD_OK                 1
+#define BOARD_QUAD_ENABLE_STATUS_BYTE 2
+#define BOARD_QUAD_ENABLE_BIT_MASK    2
+#define BOARD_SPLIT_STATUS_WRITE      1
+#define BOARD_WAIT_CYCLES             2
+
+#include "rp2040-boot-stage2.S"

targets/qtpy-rp2040.json

@@ -0,0 +1,11 @@
+{
+    "inherits": [
+        "rp2040"
+    ],
+    "serial-port": ["acm:239a:80f1"],
+    "build-tags": ["qtpy_rp2040"],
+    "linkerscript": "targets/qtpy-rp2040.ld",
+    "extra-files": [
+        "targets/qtpy-rp2040-boot-stage2.S"
+    ]
+}

targets/qtpy-rp2040.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    /* Reserve exactly 256 bytes at start of flash for second stage bootloader */
+    BOOT2_TEXT (rx) : ORIGIN = 0x10000000, LENGTH = 256
+    FLASH_TEXT (rx) : ORIGIN = 0x10000000 + 256, LENGTH = 8192K - 256
+    RAM (rwx)       : ORIGIN = 0x20000000, LENGTH = 256k
+}
+
+INCLUDE "targets/rp2040.ld"