Change in coreboot[master]: mb/google/dedede/var/kracko: Add LTE modem support

[Tony Huang (Code Review)]

Tony Huang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/52204 )

Change subject: mb/google/dedede/var/kracko: Add LTE modem support
......................................................................

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

Add LTE modem to devicetree
Configure GPIO control for LTE modem

BUG=b:178092096
TEST=Built image and verified with command modem status

Change-Id: Id8f483e1132a08500fbe950711cc84197ce40b12
Signed-off-by: Tony Huang 
---
A src/mainboard/google/dedede/variants/kracko/Makefile.inc
A src/mainboard/google/dedede/variants/kracko/gpio.c
M src/mainboard/google/dedede/variants/kracko/overridetree.cb
A src/mainboard/google/dedede/variants/kracko/variant.c
4 files changed, 68 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/04/52204/1

diff --git a/src/mainboard/google/dedede/variants/kracko/Makefile.inc b/src/mainboard/google/dedede/variants/kracko/Makefile.inc
new file mode 100644
index 0000000..fd60a18
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/kracko/Makefile.inc
@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+
+ramstage-y += gpio.c
+
+smm-y += variant.c
diff --git a/src/mainboard/google/dedede/variants/kracko/gpio.c b/src/mainboard/google/dedede/variants/kracko/gpio.c
new file mode 100644
index 0000000..ca89730
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/kracko/gpio.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+
+/* Pad configuration in ramstage*/
+static const struct pad_config gpio_table[] = {
+	/* A10 : WWAN_EN */
+	PAD_CFG_GPO(GPP_A10, 1, PWROK),
+
+	/* B7  : PCIE_CLKREQ2_N ==> WWAN_SAR_DETECT_ODL*/
+	PAD_CFG_GPO(GPP_B7, 1, DEEP),
+
+	/* D0  : WWAN_HOST_WAKE ==> WWAN_WDISABLE_L */
+	PAD_CFG_GPO(GPP_D0, 1, DEEP),
+
+	/* H17 : WWAN_RST_L */
+	PAD_CFG_GPO(GPP_H17, 0, PLTRST),
+};
+
+const struct pad_config *variant_override_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(gpio_table);
+	return gpio_table;
+}
diff --git a/src/mainboard/google/dedede/variants/kracko/overridetree.cb b/src/mainboard/google/dedede/variants/kracko/overridetree.cb
index 99517bd..66fb274 100644
--- a/src/mainboard/google/dedede/variants/kracko/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/kracko/overridetree.cb
@@ -55,6 +55,16 @@
    		chip drivers/usb/acpi
    			device usb 0.0 on
    				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 2.3 on end
+					end
+					chip drivers/usb/acpi
    					register "desc" = ""UFCamera""
    					register "type" = "UPC_TYPE_INTERNAL"
    					device usb 2.5 on end
@@ -64,6 +74,11 @@
    					register "type" = "UPC_TYPE_INTERNAL"
    					device usb 2.6 on end
    				end
+					chip drivers/usb/acpi
+						register "desc" = ""LTE""
+						register "type" = "UPC_TYPE_INTERNAL"
+						device usb 3.3 on end
+					end
    			end
    		end
    	end # USB xHCI
diff --git a/src/mainboard/google/dedede/variants/kracko/variant.c b/src/mainboard/google/dedede/variants/kracko/variant.c
new file mode 100644
index 0000000..22caa06
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/kracko/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();
+}