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authorDuncan Laurie <dlaurie@google.com>2020-10-10 00:05:36 +0000
committerPatrick Georgi <pgeorgi@google.com>2020-11-09 07:32:13 +0000
commit44caa1963fb9e3aa0a392223dab3b9c33acdc441 (patch)
tree55972f116bd121b5b4d19e39a10d632b63e83b55 /tests/include
parent74c16d0a8ba76f07b17d0db58071933b7d7f12b6 (diff)
intel/common/pmc: Add functions for IPC mailbox in ACPI
This change adds two functions that provide an IPC mailbox method via ACPI for runtime clock configuration. pmc_acpi_fill_ssdt_ipc_write_method() will provide a method in the SSDT that can be called by other ACPI devices to send an IPC mailbox command. This function is exported because some SOCs override the default PMC device and need to call this function to write the method into the SSDT. pmc_acpi_set_pci_clock() will call the method defined by the previous function to enable or disable the PCIe SRCCLK for a specified root port and clock pin. It can be called by the PCIe root port after turning off power to the attached device. BUG=b:160996445 TEST=boot on volteer device and disassemble the SSDT to ensure that this method exists. Signed-off-by: Duncan Laurie <dlaurie@google.com> Change-Id: I95f5a1ba2bc6905e0f8ce0e8b2342ad1287a23a0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/46259 Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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