mb/google/brya/var/nivviks: Implement WWAN power sequencing

Nissa is using the FM101, which has the following power sequencing
requirements:

Power on: assert WWAN_EN, delay 20 ms, deassert WWAN_RST_L
Power off: assert WWAN_RST_L, delay 20 ms, deassert WWAN_EN

Add a power resource to the USB device, and use wwan_power.asl to
handle the power off sequence.

BUG=b:217092522
TEST=abuild -a -x -c max -p none -t google/brya -b nivviks

Signed-off-by: Reka Norman <rekanorman@google.com>
Change-Id: Ibe1b863a550c6af1ac3eb98f2aaa3db15b149ada
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61694
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>

src/mainboard/google/brya/Kconfig.name

@@ -85,6 +85,7 @@ config BOARD_GOOGLE_NIVVIKS
 	bool "->  Nivviks"
 	select BOARD_GOOGLE_BASEBOARD_NISSA
 	select DRIVERS_INTEL_MIPI_CAMERA
+	select HAVE_WWAN_POWER_SEQUENCE
 
 config BOARD_GOOGLE_NEREID
 	bool "->  Nereid"

src/mainboard/google/brya/variants/nivviks/include/variant/gpio.h

@@ -5,4 +5,8 @@
 
 #include <baseboard/gpio.h>
 
+#define WWAN_FCPO	GPP_D6
+#define WWAN_RST	GPP_F12
+#define T2_OFF_MS	20
+
 #endif

src/mainboard/google/brya/variants/nivviks/overridetree.cb

@@ -281,6 +281,11 @@ chip soc/intel/alderlake
 					chip drivers/usb/acpi
 						register "desc" = ""USB2 WWAN""
 						register "type" = "UPC_TYPE_INTERNAL"
+						register "has_power_resource" = "1"
+						register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_F12)"
+						register "reset_off_delay_ms" = "20"
+						register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D6)"
+						register "enable_delay_ms" = "20"
 						device ref usb2_port4 on
 							probe DB_USB DB_1C_LTE
 						end