pieeprom-2025-02-11: 2712: CM5 no-wifi stability improvements (latest)

firmware-2712/release-notes.md

@@ -1,5 +1,78 @@
 # Raspberry Pi5 bootloader EEPROM release notes
 
+## 2025-02-11: CM5 no-Wifi stability improvements (latest)
+
+* recovery: Walk partitions to delete recovery.bin
+  Previously, recovery.bin would fail to delete itself
+  if the bootrom loaded recovery.bin where there are multiple FAT
+  partitions and the first partition does not contain recovery.bin
+  Update the rename code to walk the partition table to find
+  the recovery.bin file to delete.
+* pi5: Add config filter for simple boot variable expressions (experimental)
+  Add support for a new bootloader/config.txt conditional filter
+  which tests the partition, boot_count and boot_arg1 variables.
+  Syntax (no spaces):
+  ARG boot_arg1, boot_count or partition (EEPROM config stage only)
+  [ARG=VALUE]      selected if (ARG == VALUE)
+  [ARG&MASK]       selected if ((ARG & VALUE) != 0))
+  [ARG&MASK=VALUE] selected if ((ARG & MASK) == VALUE)
+  [ARG<VALUE]      selected if (ARG < VALUE)
+  [ARG>VALUE]      selected if (ARG > VALUE)
+  where VALUE and MASK are unsigned integer constants and ARG
+  corresponds to the value in the reset register before the
+  config file is parsed.
+* pi5: Add a boot-count bootloader variable (experimental)
+  Store the boot-count in a reset register and increment just
+  before the boot-order state-machine. The boot-count variable
+  is visible via device-tree /proc/device-tree/chosen/bootloader/count
+  and can be read/set via vcmailbox
+  GET: sudo vcmailbox 0x0003008d 4 4 0
+  SET to N: sudo vcmailbox 0x0003808d 4 4 N
+* pi5: Add user-defined reboot argument (boot_arg1) (experimental)
+  Add support for a user-defined boot parameter stored in a reset-safe
+  scratch register on BCM2712.  This is visible via device-tree at
+  /proc/device-tree/chosen/bootloader/arg1 and via vcmailboxes
+  GET arg1: sudo vcmailbox 0x0003008c 8 8 1 0
+  SET arg1 to 42: sudo vcmailbox 0x0003808c 8 8 1 42
+  or via config.txt
+  set_reboot_arg1=42
+  The variable is NOT cleared automatically and will persist until
+  a power-on-reset.
+* Enable overriding of high partition numbers
+  Previously, the PARTITION=N bootloader config setting would only
+  be used at power on reset or if the partition number passed to
+  reboot was zero.
+  Change the behaviour so that the bootloader config PARTITION
+  property can override the reboot partition number if the reboot
+  parameter is > 31.
+* Disable WiFi PMIC output on CM5 modules without WiFi
+  Disable the 3.7V WiFi power supply on CM5 modules which do not have a
+  WiFi module fitted. This fixes some stability issues where a CM5
+  would shutdown due to a spurious over-voltage condition on the
+  non-connected WiFi power supply.
+* Add memory barrier to the mbox handler
+  Firmware issue 1944 reports receiving kernel warnings about firmware
+  requests where the status return code is 0. This should not be
+  possible, as handle_mbox_property always sets the top bit of the return
+  code, with the bottom bit indicating success or failure. If the firmware
+  had died, the firmware driver would report a timeout due to the lack of
+  a mailbox interrupt, and that isn't happening.
+  See: https://github.com/raspberrypi/firmware/issues/1944
+* support dts files with size-cells of 2
+  DTS files with a top-level #size-cells of 2 make a lot of sense for
+  systems with a lot of RAM, but the firmware is currently inconsistent
+  in its support for that. Fix up the other cases to honor #size-cells
+  and #address-cells.
+* Disable SDIO2 for CM5s without WiFi
+  It has been observed that CM5s without WiFi hang on reboot. To prevent
+  that, disable the sdio2 node on those devices.
+  See: https://github.com/raspberrypi/linux/issues/6647
+* arm_dt: Use dtoverlay_enable_node
+  Convert the open-coded DT node status changes to use the new dtoverlay
+  method dtoverlay_enable_node.
+* dtoverlay: Add dtoverlay_enable_node
+  Add a helper function for setting the status of a node.
+
 ## 2025-01-27: Walk the partition table if the requested partition is not bootable (latest)
 
 * Walk the partition table if the requested partition is not bootable