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mb/google/dedede/variants/shotzo: Turn off LAN power in S0ix

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Turn off the LAN power which is controlled by GPP_A10 in S0ix states.
For an USB device, the S0ix hook is needed for the on/off operationas
to take place.

BUG=b:245426120
BRANCH=firmware-dedede-13606.B
TEST=emerge-shotzo coreboot
     check LAN LED off in S0ix states
     check LAN function ok after suspending 500 loops
     check SSDT table has MS0X entry
     Scope (\_SB)
    {
        Method (MS0X, 1, Serialized)
        {
            If ((Arg0 == One))
            {
                \_SB.PCI0.CTXS (0x41)
            }
            Else
            {
                \_SB.PCI0.STXS (0x41)
            }
        }
    }

Change-Id: I3fcab4a73239b4f006839c0c81e9b4cc74047b77
Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67528
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
This commit is contained in:
Tony Huang 2022-09-12 11:00:07 +08:00 • committed by Felix Held
commit c3e36ea20b
2 changed files with 14 additions and 0 deletions
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1
src/mainboard/google/dedede/variants/shotzo/Makefile.inc
View file

@ -1,3 +1,4 @@
## SPDX-License-Identifier: GPL-2.0-or-later
ramstage-y += gpio.c
ramstage-y += variant.c

13
src/mainboard/google/dedede/variants/shotzo/variant.c Normal file
View file

@ -0,0 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpigen.h>
#include <baseboard/variants.h>
#include <variant/gpio.h>
void variant_generate_s0ix_hook(enum s0ix_entry entry)
{
if (entry == S0IX_ENTRY)
acpigen_soc_clear_tx_gpio(GPP_A10);
else if (entry == S0IX_EXIT)
acpigen_soc_set_tx_gpio(GPP_A10);
}