Change in coreboot[master]: mb/google/dedede/var/cret: Support LTE module

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/51844 )

Change subject: mb/google/dedede/var/cret: Support LTE module
......................................................................

mb/google/dedede/var/cret: Support LTE module

Add LTE module support into devicetree and associated GPIO configuration.

BUG=b:183774169
BRANCH=dedede
TEST=Build the cret board.

Signed-off-by: Dtrain Hsu 
Change-Id: I14684bb30e46bf845a401649f56b16b60db379e8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51844
Tested-by: build bot (Jenkins) 
Reviewed-by: Karthik Ramasubramanian 
---
M src/mainboard/google/dedede/variants/cret/Makefile.inc
M src/mainboard/google/dedede/variants/cret/gpio.c
M src/mainboard/google/dedede/variants/cret/overridetree.cb
A src/mainboard/google/dedede/variants/cret/variant.c
4 files changed, 40 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Karthik Ramasubramanian: Looks good to me, approved

diff --git a/src/mainboard/google/dedede/variants/cret/Makefile.inc b/src/mainboard/google/dedede/variants/cret/Makefile.inc
index eb2c9bc..fd60a18 100644
--- a/src/mainboard/google/dedede/variants/cret/Makefile.inc
+++ b/src/mainboard/google/dedede/variants/cret/Makefile.inc
@@ -1,3 +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/cret/gpio.c b/src/mainboard/google/dedede/variants/cret/gpio.c
index cb56221..3dd15ef 100644
--- a/src/mainboard/google/dedede/variants/cret/gpio.c
+++ b/src/mainboard/google/dedede/variants/cret/gpio.c
@@ -5,6 +5,8 @@

/* Pad configuration in ramstage */
 static const struct pad_config override_gpio_table[] = {
+	/* A10 : WWAN_EN */
+	PAD_CFG_GPO(GPP_A10, 1, PWROK),
    /* C12 : AP_PEN_DET_ODL  ==> NC */
    PAD_NC(GPP_C12, UP_20K),
    /* C18 : AP_I2C_EMR_SDA */
@@ -13,6 +15,8 @@
    PAD_NC(GPP_C19, NONE),
    /* C22 : UART2_RTS_N ==> NC */
    PAD_NC(GPP_C22, UP_20K),
+	/* D0  : WWAN_HOST_WAKE ==> WWAN_WDISABLE_L */
+	PAD_CFG_GPO(GPP_D0, 1, DEEP),
    /* D12 : WCAM_RST_L ==> NC */
    PAD_NC(GPP_D12, NONE),
    /* D14 : EN_PP1200_CAMERA ==> NC */
@@ -23,6 +27,8 @@
    PAD_NC(GPP_D19, NONE),
    /* D20 : WWAN_WLAN_COEX2 ==> NC */
    PAD_NC(GPP_D20, NONE),
+	/* D21 : WWAN_WLAN_COEX3 ==> NC */
+	PAD_NC(GPP_D21, NONE),
    /* E0  : CLK_24M_UCAM ==> NC */
    PAD_NC(GPP_E0, NONE),
    /* E2  : CLK_24M_WCAM ==> NC */
@@ -33,6 +39,8 @@
    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),
    /* G0  : SD_CMD ==> NC */
    PAD_NC(GPP_G0, NONE),
    /* G1  : SD_DATA0 ==> NC */
diff --git a/src/mainboard/google/dedede/variants/cret/overridetree.cb b/src/mainboard/google/dedede/variants/cret/overridetree.cb
index 45e7afb..0cf3bdf 100644
--- a/src/mainboard/google/dedede/variants/cret/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/cret/overridetree.cb
@@ -75,6 +75,13 @@
    				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" = "10"
+						register "enable_gpio" =
+							"ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10)"
+						register "enable_delay_ms" = "20"
    					device usb 3.3 on end
    				end
    			end
diff --git a/src/mainboard/google/dedede/variants/cret/variant.c b/src/mainboard/google/dedede/variants/cret/variant.c
new file mode 100644
index 0000000..2540fc7
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/cret/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(10);
+	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();
+}