[S] Change in coreboot[master]: mb/google/brya/var/marasov: Turn off camera power during S0ix

[Martin L Roth (Code Review)]

Martin L Roth has submitted this change. ( https://review.coreboot.org/c/coreboot/+/72089 )

Change subject: mb/google/brya/var/marasov: Turn off camera power during S0ix
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mb/google/brya/var/marasov: Turn off camera power during S0ix

Turn off camera power during S0ix to improve power consumption.

BUG=b:265754302
BRANCH=firmware-brya-14505.B
TEST=emerge-brya coreboot chromeos-bootimage

Signed-off-by: Frank Chu 
Change-Id: Ie2b300783adfc1cab30bc897d086a3674436724a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72089
Tested-by: build bot (Jenkins) 
Reviewed-by: Frank Chu 
Reviewed-by: Subrata Banik 
Reviewed-by: Eric Lai 
---
M src/mainboard/google/brya/variants/marasov/Makefile.inc
M src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
A src/mainboard/google/brya/variants/marasov/variant.c
3 files changed, 39 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Frank Chu: Looks good to me, but someone else must approve
  Subrata Banik: Looks good to me, approved
  Eric Lai: Looks good to me, approved

diff --git a/src/mainboard/google/brya/variants/marasov/Makefile.inc b/src/mainboard/google/brya/variants/marasov/Makefile.inc
index 4d25f34e..70f6401 100644
--- a/src/mainboard/google/brya/variants/marasov/Makefile.inc
+++ b/src/mainboard/google/brya/variants/marasov/Makefile.inc
@@ -7,3 +7,5 @@
 romstage-y += memory.c

ramstage-y += gpio.c
+
+ramstage-y += variant.c
diff --git a/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h b/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
index c4fe342..f62197d 100644
--- a/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
+++ b/src/mainboard/google/brya/variants/marasov/include/variant/gpio.h
@@ -5,4 +5,6 @@

#include <baseboard/gpio.h>

+#define CAM_PWR GPP_A17
+
 #endif
diff --git a/src/mainboard/google/brya/variants/marasov/variant.c b/src/mainboard/google/brya/variants/marasov/variant.c
new file mode 100644
index 0000000..dad8a3c
--- /dev/null
+++ b/src/mainboard/google/brya/variants/marasov/variant.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpigen.h>
+#include <baseboard/variants.h>
+#include <variant/gpio.h>
+
+void variant_generate_s0ix_hook(enum s0ix_entry entry)
+{
+	/* Add board-specific MS0X entries */
+	if (entry == S0IX_ENTRY)
+		acpigen_soc_clear_tx_gpio(CAM_PWR);
+	if (entry == S0IX_EXIT)
+		acpigen_soc_set_tx_gpio(CAM_PWR);
+}