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pieeprom-2025-06-29: 2712: Check for SD card overcurrent on Pi5 and Pi500 (latest)

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* board_info: Use the Ethernet PHY address probed by the bootloader
  Use the Ethernet PHY address supplied by the bootloader in
  preference to the static configurations defined in start4.elf
* pi5: Fix overwrite of cache EEPROM config in secure-boot mode
  See: https://github.com/raspberrypi/rpi-eeprom/issues/719
* Check for SD card overcurrent on Pi5, Pi500 and Pi4
  Before booting, the bootloader now checks the SD power switch
  overcurrent signal. The overcurrent signal occurs if the SD
  card is damaged and has a short circuit which will cause it to
  get hot.
  If an over-current condition is detected the bootloader
  switches off power to the SD card and waits five seconds before
  probing the SD card again. This error is displayed on the
  diagnostic screen, the UART and the activity LED (1 long, 2 short)
  flashes.
  The check can be switched to a non-blocking warning  by setting
  SD_OVERCURRENT_CHECK=0 in the bootloader config.
* Add a new error code pattern for SD overcurrent
  Add a new error pattern (1 long, 2 short) to signal SD card
  overcurrent.
* Enable RTC wakeup from POWER_OFF_ON_HALT=0
* Improve HAT+ current handling
  In shipping firmware, the current_supply value is only being used in the
  case of a normal (non-stacked) HAT+, but that is unnecessarily
  restrictive. Also, the presence of MODE0 and MODE1 power HATs is not
  reflected in the value of max_current.
  See: https://github.com/raspberrypi/linux/pull/6678
This commit is contained in:
Tim Gover
2025-06-30 10:20:03 +01:00
committed by Tim Gover
parent 20deeae5ea
commit 54f04c2209
3 changed files with 30 additions and 0 deletions
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firmware-2712/release-notes.md
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# Raspberry Pi5 bootloader EEPROM release notes # Raspberry Pi5 bootloader EEPROM release notes
## 2025-06-29: Check for SD card overcurrent on Pi5 and Pi500 (latest)
* board_info: Use the Ethernet PHY address probed by the bootloader
Use the Ethernet PHY address supplied by the bootloader in
preference to the static configurations defined in start4.elf
* pi5: Fix overwrite of cache EEPROM config in secure-boot mode
See: https://github.com/raspberrypi/rpi-eeprom/issues/719
* Check for SD card overcurrent on Pi5, Pi500 and Pi4
Before booting, the bootloader now checks the SD power switch
overcurrent signal. The overcurrent signal occurs if the SD
card is damaged and has a short circuit which will cause it to
get hot.
If an over-current condition is detected the bootloader
switches off power to the SD card and waits five seconds before
probing the SD card again. This error is displayed on the
diagnostic screen, the UART and the activity LED (1 long, 2 short)
flashes.
The check can be switched to a non-blocking warning by setting
SD_OVERCURRENT_CHECK=0 in the bootloader config.
* Add a new error code pattern for SD overcurrent
Add a new error pattern (1 long, 2 short) to signal SD card
overcurrent.
* Enable RTC wakeup from POWER_OFF_ON_HALT=0
* Improve HAT+ current handling
In shipping firmware, the current_supply value is only being used in the
case of a normal (non-stacked) HAT+, but that is unnecessarily
restrictive. Also, the presence of MODE0 and MODE1 power HATs is not
reflected in the value of max_current.
See: https://github.com/raspberrypi/linux/pull/6678
## 2025-06-20: Add support for a bootloader watchdog (latest) ## 2025-06-20: Add support for a bootloader watchdog (latest)
* Add support for a bootloader watchdog * Add support for a bootloader watchdog