mb/google/dedede/var/sasuke: Add LTE modem support

This change enables LTE modem for sasuke.
- Add LTE modem device into devicetree
- Add GPIO control for LTE modem power on and off

BUG=177177967
TEST=Built and verified modem device existence with lsusb

Change-Id: I34ba8ab00b73f24d1786ab014e9981b172a63a27
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49163
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/dedede/variants/sasuke/Makefile.inc

@@ -1,3 +1,5 @@
 ## SPDX-License-Identifier: GPL-2.0-or-later
 
 ramstage-y += gpio.c
+
+smm-y += variant.c

src/mainboard/google/dedede/variants/sasuke/gpio.c

@@ -5,9 +5,13 @@
 
 /* Pad configuration in ramstage*/
 static const struct pad_config gpio_table[] = {
+	/* A10 : WWAN_EN */
+	PAD_CFG_GPO(GPP_A10, 0, PLTRST),
 	/* A11 : TOUCH_RPT_EN ==> NC */
 	PAD_NC(GPP_A11, NONE),
 
+	/* B7  : PCIE_CLKREQ2_N ==> WWAN_SAR_DETECT_ODL*/
+	PAD_CFG_GPI_IRQ_WAKE(GPP_B7, NONE, DEEP, LEVEL, INVERT),
 	/* B8  : WLAN_CLKREQ_ODL ==> NC */
 	PAD_NC(GPP_B8, NONE),
 
@@ -16,6 +20,8 @@ static const struct pad_config gpio_table[] = {
 	/* C19 : AP_I2C_EMR_SCL ==> NC */
 	PAD_NC(GPP_C19, NONE),
 
+	/* D0  : WWAN_HOST_WAKE ==> WWAN_WDISABLE_L */
+	PAD_CFG_GPO(GPP_D0, 1, DEEP),
 	/* D1  : WLAN_PERST_L ==> NC */
 	PAD_NC(GPP_D1, NONE),
 	/* D3  : WLAN_PCIE_WAKE_ODL ==> NC */
@@ -53,6 +59,8 @@ static const struct pad_config gpio_table[] = {
 	PAD_NC(GPP_H6, NONE),
 	/* H7  : AP_I2C_CAM_SCL ==> NC */
 	PAD_NC(GPP_H7, NONE),
+	/* H17 : WWAN_RST_L */
+	PAD_CFG_GPO(GPP_H17, 1, PLTRST),
 
 	/* S2  : DMIC1_CLK ==> NC */
 	PAD_NC(GPP_S2, NONE),

src/mainboard/google/dedede/variants/sasuke/overridetree.cb

@@ -97,6 +97,16 @@ chip soc/intel/jasperlake
 						register "enable_delay_ms" = "20"
 						device usb 2.5 on end
 					end
+					chip drivers/usb/acpi
+						register "desc" = ""LTE""
+						register "type" = "UPC_TYPE_INTERNAL"
+						register "has_power_resource" = "1"
+						register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_H17)"
+						register "reset_off_delay_ms" = "20"
+						register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10)"
+						register "enable_delay_ms" = "20"
+						device usb 3.3 on end
+					end
 				end
 			end
 		end # USB xHCI

src/mainboard/google/dedede/variants/sasuke/variant.c

@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpi.h>
+#include <baseboard/variants.h>
+#include <delay.h>
+#include <gpio.h>
+
+static void power_off_lte_module(void)
+{
+	gpio_output(GPP_H17, 0);
+	mdelay(20);
+	gpio_output(GPP_A10, 0);
+}
+
+void variant_smi_sleep(u8 slp_typ)
+{
+	/*
+	 * Once the FW_CONFIG is provisioned, power off LTE module only under
+	 * the situation where it is stuffed.
+	 */
+	if (slp_typ == ACPI_S5)
+		power_off_lte_module();
+}