Merge tag 'rpi-2025.07-rc1' of https://source.denx.de/u-boot/custodians/u-boot-raspberrypi

Updates for RPi for 2025.07:

- copy over uart clock-frequency in DT
- always set fdt_addr with firmware-provided FDT address
- Set bootm_size to 512MB
- Drop fdt_high and initrd_high
- Update environment to support booti and large initrd

board/raspberrypi/rpi/rpi.c

@@ -359,9 +359,6 @@ static void set_fdtfile(void)
  */
 static void set_fdt_addr(void)
 {
-	if (env_get("fdt_addr"))
-		return;
-
 	if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 		return;
 
@@ -602,6 +599,9 @@ void  update_fdt_from_fw(void *fdt, void *fw_fdt)
 
 	/* Bluetooth device address as provided by the firmware */
 	copy_property(fdt, fw_fdt, "/soc/serial@7e201000/bluetooth", "local-bd-address");
+
+	/* copy uart clk as provided by the firmware */
+	copy_property(fdt, fw_fdt, "/clocks/clk-uart", "clock-frequency");
 }
 
 int ft_board_setup(void *blob, struct bd_info *bd)

board/raspberrypi/rpi/rpi.env

@@ -48,30 +48,33 @@ dfu_alt_info+=zImage fat 0 1
  *
  * scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't
  * conflict with something else. Reserving 1M for each of them at
- * 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty.
+ * 0x05400000-0x05500000 and 0x05500000-0x05600000 should be plenty.
  *
  * On ARM, both the DTB and any possible initrd must be loaded such that they
  * fit inside the lowmem mapping in Linux. In practice, this usually means not
  * more than ~700M away from the start of the kernel image but this number can
  * be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line
  * parameter given to the kernel. So reserving memory from low to high
- * satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for
- * the DTB leaves rest of the free RAM to the initrd starting at 0x02700000.
- * Even with the smallest possible CPU-GPU memory split of the CPU getting
- * only 64M, the remaining 25M starting at 0x02700000 should allow quite
- * large initrds before they start colliding with U-Boot.
+ * satisfies this constraint again. Reserving 1M at 0x05600000-0x05700000 for
+ * the DTB leaves rest of the free RAM to the initrd starting at 0x05700000.
+ * This means that the board must have at least 128MB of RAM available to
+ * U-Boot, more if the initrd is large.
+ *
+ * For compressed kernels, the maximum size is just under 32MB, with an area for
+ * decompression at 0x02000000 with space for 52MB, which is plenty for current
+ * kernels.
+ *
+ * limit bootm_size to 512MB so that all boot images stay within the bottom
+ * 512MB of memory
  */
-#ifdef CONFIG_ARM64
-fdt_high=ffffffffffffffff
-initrd_high=ffffffffffffffff
-#else
-fdt_high=ffffffff
-initrd_high=ffffffff
-#endif
+bootm_size=0x20000000
+
 kernel_addr_r=0x00080000
-scriptaddr=0x02400000
-pxefile_addr_r=0x02500000
-fdt_addr_r=0x02600000
-ramdisk_addr_r=0x02700000
+kernel_comp_addr_r=0x02000000
+kernel_comp_size=0x03400000
+scriptaddr=0x05400000
+pxefile_addr_r=0x05500000
+fdt_addr_r=0x05600000
+ramdisk_addr_r=0x05700000
 
 boot_targets=mmc usb pxe dhcp