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pieeprom-2024-12-19: 2712: Disable PWM fan at shutdown (POWER_OFF_ON_HALT=0) (latest)

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* Disable fan PWM before shutdown
  Drive the RP1 fan PWM GPIO high before entering the VPU
  sleep (POWER_OFF_ON_HALT=0) to stop the fan spinning.
* Disable fan PWM GPIO between RP1 init and fan probe
  Drive fan PWM GPIO high during early boot to disable the fan
  until it is probed during the device-tree setup stage.
  This stops the spinning at max rpm during network-install.
* arm_dt: enable_uart defaults to 0 on 2712
  The default value of enable_uart on 2712 is 0, regardless of the
  presence of the debug UART cable, so guarantee that the default is
  always set correctly.
This commit is contained in:
Tim Gover
2024-12-19 12:03:39 +00:00
committed by timg236
parent 4ba7cedf18
commit f02f0eaf4e
3 changed files with 14 additions and 0 deletions
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14
firmware-2712/release-notes.md
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@@ -1,5 +1,19 @@
# Raspberry Pi5 bootloader EEPROM release notes
## 2024-12-19: Disable fan PWM before shutdown (latest)
* Disable fan PWM before shutdown
Drive the RP1 fan PWM GPIO high before entering the VPU
sleep (POWER_OFF_ON_HALT=0) to stop the fan spinning.
* Disable fan PWM GPIO between RP1 init and fan probe
Drive fan PWM GPIO high during early boot to disable the fan
until it is probed during the device-tree setup stage.
This stops the spinning at max rpm during network-install.
* arm_dt: enable_uart defaults to 0 on 2712
The default value of enable_uart on 2712 is 0, regardless of the
presence of the debug UART cable, so guarantee that the default is
always set correctly.
## 2024-12-15: Add net install to boot menu (latest)
* Add net install to boot menu