7 files changed, 173 insertions, 6 deletions
diff --git a/src/mainboard/acer/g43t-am3/Kconfig b/src/mainboard/acer/g43t-am3/Kconfig
index 1d4fd53f97..34d191f4d5 100644
--- a/src/mainboard/acer/g43t-am3/Kconfig
+++ b/src/mainboard/acer/g43t-am3/Kconfig
@@ -9,7 +9,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select SOUTHBRIDGE_INTEL_I82801JX
 	select SUPERIO_ITE_IT8720F
 	select HAVE_ACPI_TABLES
-	select BOARD_ROMSIZE_KB_2048
+	select BOARD_ROMSIZE_KB_2048 if BOARD_ACER_G43T_AM3
 	select PCIEXP_ASPM
 	select PCIEXP_CLK_PM
 	select HAVE_OPTION_TABLE
@@ -22,12 +22,19 @@ config BOARD_SPECIFIC_OPTIONS
 
 config VGA_BIOS_ID
 	string
-	default "8086,2e22"
+	default "8086,2e22" if BOARD_ACER_G43T_AM3
 
 config MAINBOARD_DIR
 	default "acer/g43t-am3"
 
+config VARIANT_DIR
+	default "g43t-am3" if BOARD_ACER_G43T_AM3
+
 config MAINBOARD_PART_NUMBER
-	default "G43T-AM3"
+	default "G43T-AM3" if BOARD_ACER_G43T_AM3
+
+config OVERRIDE_DEVICETREE
+	string
+	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
 endif # BOARD_ACER_G43T_AM3
diff --git a/src/mainboard/acer/g43t-am3/Makefile.mk b/src/mainboard/acer/g43t-am3/Makefile.mk
index ede8d87e92..3e28ba4982 100644
--- a/src/mainboard/acer/g43t-am3/Makefile.mk
+++ b/src/mainboard/acer/g43t-am3/Makefile.mk
@@ -1,9 +1,11 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 ramstage-y += cstates.c
-romstage-y += gpio.c
+romstage-y += variants/$(VARIANT_DIR)/gpio.c
 
-bootblock-y += early_init.c
-romstage-y += early_init.c
+bootblock-y += variants/$(VARIANT_DIR)/early_init.c
+romstage-y += variants/$(VARIANT_DIR)/early_init.c
 
 ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
+
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include
diff --git a/src/mainboard/acer/g43t-am3/variants/g43t-am3/data.vbt b/src/mainboard/acer/g43t-am3/variants/g43t-am3/data.vbt
new file mode 100644
index 0000000000..646adbae1b
--- /dev/null
+++ b/src/mainboard/acer/g43t-am3/variants/g43t-am3/data.vbt
diff --git a/src/mainboard/acer/g43t-am3/variants/g43t-am3/early_init.c b/src/mainboard/acer/g43t-am3/variants/g43t-am3/early_init.c
new file mode 100644
index 0000000000..b34ab4651b
--- /dev/null
+++ b/src/mainboard/acer/g43t-am3/variants/g43t-am3/early_init.c
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <bootblock_common.h>
+#include <southbridge/intel/i82801jx/i82801jx.h>
+#include <northbridge/intel/x4x/x4x.h>
+#include <superio/ite/common/ite.h>
+#include <superio/ite/it8720f/it8720f.h>
+
+#define GPIO_DEV PNP_DEV(0x2e, IT8720F_GPIO)
+
+void bootblock_mainboard_early_init(void)
+{
+	/* Set up GPIOs on Super I/O. */
+	ite_reg_write(GPIO_DEV, 0x25, 0x00); // GPIO set 1
+	ite_reg_write(GPIO_DEV, 0x26, 0x0c); // GPIO set 2
+	ite_reg_write(GPIO_DEV, 0x27, 0x70); // GPIO set 3
+	ite_reg_write(GPIO_DEV, 0x28, 0x40); // GPIO set 4
+	ite_reg_write(GPIO_DEV, 0x29, 0x00); // GPIO set 5
+
+	/* Enable 3VSB during Suspend-to-RAM */
+	ite_enable_3vsbsw(GPIO_DEV);
+
+	/* Delay PWROK2 after 3VSBSW# during resume from Suspend-to-RAM */
+	ite_delay_pwrgd3(GPIO_DEV);
+}
+
+void mb_get_spd_map(u8 spd_map[4])
+{
+	spd_map[0] = 0x50;
+	spd_map[1] = 0x51;
+	spd_map[2] = 0x52;
+	spd_map[3] = 0x53;
+}
diff --git a/src/mainboard/acer/g43t-am3/variants/g43t-am3/gpio.c b/src/mainboard/acer/g43t-am3/variants/g43t-am3/gpio.c
new file mode 100644
index 0000000000..38239baf79
--- /dev/null
+++ b/src/mainboard/acer/g43t-am3/variants/g43t-am3/gpio.c
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <southbridge/intel/common/gpio.h>
+
+static const struct pch_gpio_set1 pch_gpio_set1_mode = {
+	.gpio0 = GPIO_MODE_GPIO,
+	.gpio1 = GPIO_MODE_GPIO,
+	.gpio6 = GPIO_MODE_GPIO,
+	.gpio7 = GPIO_MODE_GPIO,
+	.gpio8 = GPIO_MODE_GPIO,
+	.gpio9 = GPIO_MODE_GPIO,
+	.gpio13 = GPIO_MODE_GPIO,
+	.gpio14 = GPIO_MODE_GPIO,
+	.gpio17 = GPIO_MODE_GPIO,
+	.gpio18 = GPIO_MODE_GPIO,
+	.gpio20 = GPIO_MODE_GPIO,
+	.gpio27 = GPIO_MODE_GPIO,
+	.gpio28 = GPIO_MODE_GPIO,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_direction = {
+	.gpio0 = GPIO_DIR_INPUT,
+	.gpio1 = GPIO_DIR_INPUT,
+	.gpio6 = GPIO_DIR_INPUT,
+	.gpio7 = GPIO_DIR_INPUT,
+	.gpio8 = GPIO_DIR_INPUT,
+	.gpio9 = GPIO_DIR_OUTPUT,
+	.gpio13 = GPIO_DIR_INPUT,
+	.gpio14 = GPIO_DIR_INPUT,
+	.gpio17 = GPIO_DIR_INPUT,
+	.gpio18 = GPIO_DIR_OUTPUT,
+	.gpio20 = GPIO_DIR_OUTPUT,
+	.gpio27 = GPIO_DIR_OUTPUT,
+	.gpio28 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_level = {
+	.gpio9  = GPIO_LEVEL_HIGH,
+	.gpio18 = GPIO_LEVEL_HIGH,
+	.gpio20 = GPIO_LEVEL_LOW,
+	.gpio27 = GPIO_LEVEL_LOW,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_invert = {
+	.gpio6  = GPIO_INVERT,
+	.gpio13 = GPIO_INVERT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_blink = {
+	.gpio18 = GPIO_BLINK,
+
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_mode = {
+	.gpio32  = GPIO_MODE_GPIO,
+	.gpio33  = GPIO_MODE_GPIO,
+	.gpio34  = GPIO_MODE_GPIO,
+	.gpio35  = GPIO_MODE_NATIVE,
+	.gpio36  = GPIO_MODE_NATIVE,
+	.gpio37  = GPIO_MODE_NATIVE,
+	.gpio38  = GPIO_MODE_NATIVE,
+	.gpio39  = GPIO_MODE_NATIVE,
+	.gpio48 = GPIO_MODE_NATIVE,
+	.gpio49 = GPIO_MODE_GPIO,
+	.gpio56 = GPIO_MODE_GPIO,
+	.gpio57 = GPIO_MODE_GPIO,
+	.gpio58 = GPIO_MODE_NATIVE,
+	.gpio60 = GPIO_MODE_GPIO,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_direction = {
+	.gpio32 = GPIO_DIR_OUTPUT,
+	.gpio33 = GPIO_DIR_INPUT,
+	.gpio34 = GPIO_DIR_INPUT,
+	.gpio49 = GPIO_DIR_OUTPUT,
+	.gpio56 = GPIO_DIR_INPUT,
+	.gpio57 = GPIO_DIR_INPUT,
+	.gpio60 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_level = {
+	.gpio32 = GPIO_LEVEL_HIGH,
+	.gpio49 = GPIO_LEVEL_HIGH,
+	.gpio60 = GPIO_LEVEL_LOW,
+};
+
+const struct pch_gpio_map mainboard_gpio_map = {
+	.set1 = {
+		.mode		= &pch_gpio_set1_mode,
+		.direction	= &pch_gpio_set1_direction,
+		.level		= &pch_gpio_set1_level,
+		.blink		= &pch_gpio_set1_blink,
+		.invert		= &pch_gpio_set1_invert,
+	},
+	.set2 = {
+		.mode		= &pch_gpio_set2_mode,
+		.direction	= &pch_gpio_set2_direction,
+		.level		= &pch_gpio_set2_level,
+	},
+
+};
diff --git a/src/mainboard/acer/g43t-am3/variants/g43t-am3/include/acpi/superio.asl b/src/mainboard/acer/g43t-am3/variants/g43t-am3/include/acpi/superio.asl
new file mode 100644
index 0000000000..9f3900b86c
--- /dev/null
+++ b/src/mainboard/acer/g43t-am3/variants/g43t-am3/include/acpi/superio.asl
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#undef SUPERIO_DEV
+#undef SUPERIO_PNP_BASE
+#undef IT8720F_SHOW_SP1
+#undef IT8720F_SHOW_SP2
+#undef IT8720F_SHOW_EC
+#undef IT8720F_SHOW_KBCK
+#undef IT8720F_SHOW_KBCM
+#undef IT8720F_SHOW_GPIO
+#undef IT8720F_SHOW_CIR
+#define SUPERIO_DEV		SIO0
+#define SUPERIO_PNP_BASE	0x2e
+#define IT8720F_SHOW_EC		1
+#define IT8720F_SHOW_KBCK	1
+#define IT8720F_SHOW_KBCM	1
+#define IT8720F_SHOW_GPIO	1
+#include <superio/ite/it8720f/acpi/superio.asl>
diff --git a/src/mainboard/acer/g43t-am3/variants/g43t-am3/overridetree.cb b/src/mainboard/acer/g43t-am3/variants/g43t-am3/overridetree.cb
new file mode 100644
index 0000000000..01ab8251f5
--- /dev/null
+++ b/src/mainboard/acer/g43t-am3/variants/g43t-am3/overridetree.cb
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+chip northbridge/intel/x4x		# Northbridge
+	device domain 0 on		# PCI domain
+	end
+end