Currently all the power sequencing for FPMCU is done explicitly in
different stages of coreboot. This can all be done by adding ACPI power
resources for FPMCU and clean up the unused code. Here is the expected
power sequence:
PowerUp : Assert EN_PWR_FP -> 3 ms delay -> De-assert FPMCU_RST_ODL
Shutdown : De-assert EN_PWR_FP -> Assert FPMCU_RST_ODL
Reboot : Shutdown -> 200 ms delay -> PowerUp
BUG=None
TEST=Build and boot to OS in Guybrush. Ensure that the FP is able to
unlock the system after the first login attempt. Ensure that the FP is
able to wakeup the system. Observed that the power resource is added
correctly in the FPMCU ACPI object
Name (_PR0, Package (0x01) // _PR0: Power Resources for D0
{
PR01
})
Name (_PR3, Package (0x01) // _PR3: Power Resources for D3hot
{
PR01
})
PowerResource (PR01, 0x00, 0x0000)
{
Method (_STA, 0, NotSerialized) // _STA: Status
{
Return (0x01)
}
Method (_ON, 0, Serialized) // _ON_: Power On
{
\_SB.CTXS (0x0B)
\_SB.STXS (0x20)
\_SB.STXS (0x0B)
}
Method (_OFF, 0, Serialized) // _OFF: Power Off
{
\_SB.CTXS (0x0B)
\_SB.CTXS (0x20)
}
}
Change-Id: I52322eaecf6961ff9a196ca9ab2d58b7d4599d4f
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58705
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>
f8fe39baca