On 8/14/20 1:00 AM, Jeremy Linton wrote:
This set creates a basic thermal zone, which reads the
SOC temp via a direct register read in AML. It also
adds an active cooling policy using a GPIO pin for fan
control that can optionally be enabled/disabled by the
user from the BDS.
With the fan enabled it should be possible to see the
soc temp like:
# sensors
acpitz-acpi-0
Adapter: ACPI interface
temp1: +57.6C (crit = +90.0C)
and the fan state may be read/cycled with:
/sys/bus/acpi/devices/PNP0C06:00/PNP0C0B:00/physical_node/thermal_cooling/cur_state
Cc: Leif Lindholm <l...@nuviainc.com>
Cc: Pete Batard <p...@akeo.ie>
Cc: Andrei Warkentin <awarken...@vmware.com>
Cc: Ard Biesheuvel <ard.biesheu...@arm.com>
Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahm...@arm.com>
Jeremy Linton (3):
Platform/RaspberryPi4: Add a basic thermal zone
Platform/RaspberryPi4: Create ACPI fan object
Platform/RaspberryPi: Add entry for user fan control
I like this code a lot. It is very helpful to have working sample AML
code that implements a thermal zone. Could you elaborate on the
additional components that are needed for this? Is this a standard cape
(or whatever rpi calls it)? I assume the fan just switches between 0 and
max rpm depending on the actual temp wrt the trip point?
Platform/RaspberryPi/AcpiTables/Dsdt.asl | 31 ++++++++
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 55 ++++++++++++++
.../RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf | 3 +
.../RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni | 5 ++
.../RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr | 17 +++++
.../RaspberryPi/Drivers/ConfigDxe/SsdtThermal.asl | 83 ++++++++++++++++++++++
Platform/RaspberryPi/Include/ConfigVars.h | 4 ++
Platform/RaspberryPi/RPi3/RPi3.dsc | 5 ++
Platform/RaspberryPi/RPi4/RPi4.dsc | 8 +++
Platform/RaspberryPi/RaspberryPi.dec | 1 +
.../Bcm27xx/Include/IndustryStandard/Bcm2711.h | 2 +
11 files changed, 214 insertions(+)
create mode 100644 Platform/RaspberryPi/Drivers/ConfigDxe/SsdtThermal.asl
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