mb/google/volteer: Create Malefor variant

This commit creates a malefor variant for Volteer. The initial settings
override the baseboard was copied from variant ripto. Fine tune GPIO
and memory DQ based on malefor schematics.

BUG=b:150653745
BRANCH=volteer
TEST=emerge-volteer coreboot

Signed-off-by: William Wei <wenxu.wei@bitland.corp-partner.google.com>
Change-Id: Idbeebb13e537287686344740211143df35b7863a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39857
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

6 files changed, 479 insertions, 0 deletions

diff --git a/src/mainboard/google/volteer/variants/malefor/Makefile.inc b/src/mainboard/google/volteer/variants/malefor/Makefile.inc
new file mode 100644
index 0000000000..8a7cbec383
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/malefor/Makefile.inc
@@ -0,0 +1,11 @@
+## SPDX-License-Identifier: GPL-2.0-only
+## This file is part of the coreboot project.
+
+## Memory Options
+SPD_SOURCES = SPD_LPDDR4X_200b_8bank_1Rx16_16Gb_DDP_4267     # 0b0000
+
+romstage-y += memory.c
+
+bootblock-y += gpio.c
+
+ramstage-y += gpio.c
diff --git a/src/mainboard/google/volteer/variants/malefor/gpio.c b/src/mainboard/google/volteer/variants/malefor/gpio.c
new file mode 100644
index 0000000000..71a03e60dc
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/malefor/gpio.c
@@ -0,0 +1,402 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <commonlib/helpers.h>
+
+/* Pad configuration in ramstage */
+/* Leave eSPI pins untouched from default settings */
+static const struct pad_config gpio_table[] = {
+	/* A0 thru A6 come configured out of reset, do not touch */
+	/* A0  : ESPI_IO0 ==> ESPI_IO_0 */
+	/* A1  : ESPI_IO1 ==> ESPI_IO_1 */
+	/* A2  : ESPI_IO2 ==> ESPI_IO_2 */
+	/* A3  : ESPI_IO3 ==> ESPI_IO_3 */
+	/* A4  : ESPI_CS# ==> ESPI_CS_L */
+	/* A5  : ESPI_CLK ==> ESPI_CLK */
+	/* A6  : ESPI_RESET# ==> NC(TP764) */
+	/* A7  : I2S2_SCLK ==> EN_PP3300_TRACKPAD */
+	PAD_CFG_GPO(GPP_A7, 1, DEEP),
+	/* A8  : I2S2_SFRM ==> EN_PP3300_TOUCHSCREEN */
+	PAD_CFG_GPO(GPP_A8, 1, DEEP),
+	/* A9  : I2S2_TXD ==> EC_IN_RW_OD */
+	PAD_CFG_GPI(GPP_A9, NONE, DEEP),
+	/* A10 : I2S2_RXD ==> EN_SPKR_PA */
+	PAD_CFG_GPO(GPP_A10, 1, DEEP),
+	/* A11 : PMC_I2C_SDA ==> SSD_PERST_L */
+	PAD_CFG_GPO(GPP_A11, 1, DEEP),
+	/* A12 : SATAXPCIE1 ==> M2_SSD_PEDET */
+	PAD_CFG_NF(GPP_A12, NONE, DEEP, NF1),
+	/* A13 : PMC_I2C_SCL ==> BT_DISABLE_L */
+	PAD_CFG_GPO(GPP_A13, 1, DEEP),
+	/* A14 : USB_OC1# ==> USB_A0_OC_ODL */
+	PAD_CFG_NF(GPP_A14, NONE, DEEP, NF1),
+	/* A15 : USB_OC2# ==> USB_A1_OC_ODL */
+	PAD_CFG_NF(GPP_A15, NONE, DEEP, NF1),
+	/* A16 : USB_OC3# ==> USB_C0_OC_ODL */
+	PAD_CFG_NF(GPP_A16, NONE, DEEP, NF1),
+	/* A17 : DDSP_HPDC ==> MEM_CH_SEL */
+	PAD_CFG_GPI(GPP_A17, NONE, DEEP),
+	/* A18 : DDSP_HPDB ==> HDMI_HPD */
+	PAD_CFG_NF(GPP_A18, NONE, DEEP, NF1),
+	/* A19 : DDSP_HPD1 ==> USB_C0_DP_HPD */
+	PAD_CFG_NF(GPP_A19, NONE, DEEP, NF1),
+	/* A20 : DDSP_HPD2 ==> USB_C1_DP_HPD */
+	PAD_CFG_NF(GPP_A20, NONE, DEEP, NF1),
+	/* A21 : DDPC_CTRCLK ==> EN_FP_PWR */
+	PAD_CFG_GPO(GPP_A21, 1, DEEP),
+	/* A22 : DDPC_CTRLDATA ==> EN_HDMI_PWR */
+	PAD_CFG_GPO(GPP_A22, 1, DEEP),
+	/* A23 : I2S1_SCLK ==> I2S1_SPKR_SCLK */
+	PAD_CFG_NF(GPP_A23, NONE, DEEP, NF1),
+
+	/* B0  : CORE_VID0 */
+	PAD_CFG_NF(GPP_B0, NONE, DEEP, NF1),
+	/* B1  : CORE_VID1 */
+	PAD_CFG_NF(GPP_B1, NONE, DEEP, NF1),
+	/* B2  : VRALERT# ==> NOT USED */
+	PAD_NC(GPP_B2, NONE),
+	/* B3  : CPU_GP2 ==> PEN_DET_ODL */
+	PAD_CFG_GPI(GPP_B3, NONE, DEEP),
+	/* B4  : CPU_GP3 ==> NC */
+	PAD_NC(GPP_B4, NONE),
+	/* B5  : ISH_I2C0_CVF_SDA ==> NOT USED*/
+	PAD_NC(GPP_B5, NONE),
+	/* B6  : ISH_I2C0_CVF_SCL ==> NOT USED*/
+	PAD_NC(GPP_B6, NONE),
+	/* B7  : ISH_12C1_SDA ==> NOT USED */
+	PAD_NC(GPP_B7, NONE),
+	/* B8  : ISH_I2C1_SCL ==> NOT USED */
+	PAD_NC(GPP_B8, NONE),
+	/* B9  : I2C5_SDA ==> PCH_I2C5_TRACKPAD_SDA */
+	PAD_CFG_NF(GPP_B9, NONE, DEEP, NF1),
+	/* B10 : I2C5_SCL ==> PCH_I2C5_TRACKPAD_SCL */
+	PAD_CFG_NF(GPP_B10, NONE, DEEP, NF1),
+	/* B11 : PMCALERT# ==> PCH_WP_OD */
+	PAD_CFG_GPI_GPIO_DRIVER(GPP_B11, NONE, DEEP),
+	/* B12 : SLP_S0# ==> SLP_S0_L */
+	PAD_CFG_NF(GPP_B12, NONE, DEEP, NF1),
+	/* B13 : PLTRST# ==> PLT_RST_L */
+	PAD_CFG_NF(GPP_B13, NONE, DEEP, NF1),
+	/* B14 : SPKR ==> GPP_B14_STRAP */
+	PAD_NC(GPP_B14, NONE),
+	/* B15 : GSPI0_CS0# ==> PCH_GSPI0_H1_TPM_CS_L */
+	PAD_CFG_NF(GPP_B15, NONE, DEEP, NF1),
+	/* B16 : GSPI0_CLK ==> PCH_GSPI0_H1_TPM_CLK */
+	PAD_CFG_NF(GPP_B16, NONE, DEEP, NF1),
+	/* B17 : GSPI0_MISO ==> PCH_GSPIO_H1_TPM_MISO */
+	PAD_CFG_NF(GPP_B17, NONE, DEEP, NF1),
+	/* B18 : GSPI0_MOSI ==> PCH_GSPI0_H1_TPM_MOSI_STRAP */
+	PAD_CFG_NF(GPP_B18, NONE, DEEP, NF1),
+	/* B19 : GSPI1_CS0# ==> PCH_GSPI1_FPMCU_CS_L */
+	PAD_CFG_NF(GPP_B19, NONE, DEEP, NF1),
+	/* B20 : GSPI1_CLK ==> PCH_GSPI1_FPMCU_CLK */
+	PAD_CFG_NF(GPP_B20, NONE, DEEP, NF1),
+	/* B21 : GSPI1_MISO ==> PCH_GSPI1_FPMCU_MISO */
+	PAD_CFG_NF(GPP_B21, NONE, DEEP, NF1),
+	/* B22 : GSPI1_MOSI ==> PCH_GSPI1_GPMCU_MOSI */
+	PAD_CFG_NF(GPP_B22, NONE, DEEP, NF1),
+	/* B23 : SML1ALERT# ==> GPP_B23_STRAP # */
+	PAD_NC(GPP_B23, NONE),
+
+	/* C0  : SMBCLK ==> EN_PP3300_WLAN */
+	PAD_CFG_GPO(GPP_C0, 1, DEEP),
+	/* C1  : SMBDATA ==> NOT USED */
+	PAD_NC(GPP_C1, NONE),
+	/* C2  : SMBALERT# ==> GPP_C2_STRAP */
+	PAD_NC(GPP_C2, NONE),
+	/* C3  : SML0CLK ==> USB4_SMB_SCL */
+	PAD_CFG_NF(GPP_C3, NONE, DEEP, NF1),
+	/* C4  : SML0DATA ==> USB4_SMB_SDA */
+	PAD_CFG_NF(GPP_C4, NONE, DEEP, NF1),
+	/* C5  : SML0ALERT# ==> USB_SMB_INT_L_BOOT_STRAP0 */
+	PAD_NC(GPP_C5, NONE),
+	/* C6  : SML1CLK ==> EC_PCH_INT_ODL */
+	PAD_CFG_GPI_APIC(GPP_C6, NONE, PLTRST, LEVEL, INVERT),
+	/* C7  : SML1DATA ==> EN_PP5000_PEN */
+	PAD_CFG_GPO(GPP_C7, 1, DEEP),
+	/* C8  : UART0_RXD ==> UART_PCH_RX_DEBUG_TX */
+	PAD_CFG_NF(GPP_C8, NONE, DEEP, NF1),
+	/* C9  : UART0_TXD ==> UART_PCH_TX_DEBUG_RX */
+	PAD_CFG_NF(GPP_C9, NONE, DEEP, NF1),
+	/* C10 : UART0_RTS# ==> USI_RST_L */
+	PAD_CFG_GPO(GPP_C10, 1, DEEP),
+	/* C11 : UART0_CTS# ==> NOT USED */
+	PAD_NC(GPP_C11, NONE),
+	/* C12 : UART1_RXD ==> MEM_STRAP_0 */
+	PAD_CFG_GPI(GPP_C12, NONE, DEEP),
+	/* C13 : UART1_TXD ==> NOT USED */
+	PAD_NC(GPP_C13, NONE),
+	/* C14 : UART1_RTS# ==> MEM_STRAP_2 */
+	PAD_CFG_GPI(GPP_C14, NONE, DEEP),
+	/* C15 : UART1_CTS# ==> MEM_STRAP_1 */
+	PAD_CFG_GPI(GPP_C15, NONE, DEEP),
+	/* C16 : I2C0_SDA ==> PCH_I2C0_1V8_AUDIO_SDA */
+	PAD_CFG_NF(GPP_C16, NONE, DEEP, NF1),
+	/* C17 : I2C0_SCL ==> PCH_I2C0_1V8_AUDIO_SCL */
+	PAD_CFG_NF(GPP_C17, NONE, DEEP, NF1),
+	/* C18 : I2C1_SDA ==> PCH_I2C1_TOUCH_USI_SDA */
+	PAD_CFG_NF(GPP_C18, NONE, DEEP, NF1),
+	/* C19 : I2C1_SCL ==> PCH_I2C1_TOUCH_USI_SCL */
+	PAD_CFG_NF(GPP_C19, NONE, DEEP, NF1),
+	/* C20 : UART2_RXD ==> FPMCU_INT_L */
+	PAD_CFG_GPI_INT(GPP_C20, NONE, PLTRST, LEVEL),
+	/* C21 : UART2_TXD ==> H1_PCH_INT_ODL */
+	PAD_CFG_GPI_APIC(GPP_C21, NONE, PLTRST, LEVEL, INVERT),
+	/* C22 : UART2_RTS# ==> PCH_FPMCU_BOOT0 */
+	PAD_CFG_GPO(GPP_C22, 0, DEEP),
+	/* C23 : UART2_CTS# ==> FPMCU_RST_ODL */
+	PAD_CFG_GPO(GPP_C23, 1, DEEP),
+
+	/* D0  : ISH_GP0 ==> NOT USED */
+	PAD_NC(GPP_D0, NONE),
+	/* D1  : ISH_GP1 ==> NOT USED */
+	PAD_NC(GPP_D1, NONE),
+	/* D2  : ISH_GP2 ==> NOT USED */
+	PAD_NC(GPP_D2, NONE),
+	/* D3  : ISH_GP3 ==> NOT USED */
+	PAD_NC(GPP_D3, NONE),
+	/* D4  : IMGCLKOUT0 ==> NOT USED */
+	PAD_NC(GPP_D4, NONE),
+	/* D5  : SRCCLKREQ0$ ==> SSD_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D5, NONE, DEEP, NF1),
+	/* D6  : SRCCLKREQ1# ==> WLAN_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D6, NONE, DEEP, NF1),
+	/* D7  : SRCCLKREQ2# ==> NOT USED */
+	PAD_NC(GPP_D7, NONE),
+	/* D8  : SRCCLKREQ3# ==> SD_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D8, NONE, DEEP, NF1),
+	/* D9  : ISH_SPI_CS# ==> NOT USED */
+	PAD_NC(GPP_D9, NONE),
+	/* D10 : ISH_SPI_CLK ==> PCH_GSPI2_CVF_CLK_STRAP */
+	PAD_NC(GPP_D10, NONE),
+	/* D11 : ISH_SPI_MISO ==> NOT USED */
+	PAD_NC(GPP_D11, NONE),
+	/* D12 : ISH_SPI_MOSI ==> PCH_GSPI2_CVF_MISO_STRAP */
+	PAD_NC(GPP_D12, NONE),
+	/* D13 : ISH_UART0_RXD ==> UART_ISH_RX_DEBUG_TX */
+	PAD_CFG_NF(GPP_D13, NONE, DEEP, NF1),
+	/* D14 : ISH_UART0_TXD ==> UART_ISH_TX_DEBUG_RX */
+	PAD_CFG_NF(GPP_D14, NONE, DEEP, NF1),
+	/* D15 : ISH_UART0_RTS# ==> MEM_STRAP_3 */
+	PAD_CFG_GPI(GPP_D15, NONE, DEEP),
+	/* D16 : ISH_UART0_CTS# ==> EN_PP3300_SD */
+	PAD_CFG_GPO(GPP_D16, 1, DEEP),
+	/* D17 : ISH_GP4 ==> EN_CVF_PWR */
+	PAD_CFG_GPO(GPP_D17, 1, DEEP),
+	/* D18 : ISH_GP5 ==> NOT USED */
+	PAD_NC(GPP_D18, NONE),
+	/* D19 : I2S_MCLK1 ==> I2S_MCLK1 */
+	PAD_CFG_NF(GPP_D19, NONE, DEEP, NF1),
+
+	/* E0  : SATAXPCIE0 ==> USB_A1_RT_RST_ODL */
+	PAD_CFG_GPO(GPP_E0, 1, DEEP),
+	/* E1  : SPI1_IO2 ==> PEN_DET_ODL */
+	PAD_CFG_GPI_SCI_LOW(GPP_E1, NONE, DEEP, EDGE_SINGLE),
+	/* E2  : SPI1_IO3 ==> WLAN_PCIE_WAKE_ODL */
+	PAD_CFG_GPI(GPP_E2, NONE, DEEP),
+	/* E3  : CPU_GP0 ==> USI_REPORT_EN */
+	PAD_CFG_GPO(GPP_E3, 1, DEEP),
+	/* E4  : SATA_DEVSLP0 ==> M2_SSD_PE_WAKE_ODL */
+	PAD_CFG_GPI(GPP_E4, NONE, DEEP),
+	/* E5  : SATA_DEVSLP1 ==> M2_SSD_DEVSLP_OD */
+	PAD_CFG_NF(GPP_E5, NONE, DEEP, NF1),
+	/* E6  : THC0_SPI1_RST# ==> GPPE6_STRAP */
+	PAD_NC(GPP_E6, NONE),
+	/* E7  : CPU_GP1 ==> USI_INT */
+	PAD_CFG_GPI(GPP_E7, NONE, DEEP),
+	/* E8  : SPI1_CS1# ==> SLP_S0IX */
+	PAD_CFG_GPO(GPP_E8, 0, DEEP),
+	/* E9  : USB2_OC0# ==> USB_C1_OC_ODL */
+	PAD_CFG_NF(GPP_E9, NONE, DEEP, NF1),
+	/* E10 : SPI1_CS# ==> USB_C0_AUXP_DC */
+	PAD_CFG_GPO(GPP_E10, 0, DEEP),
+	/* E11 : SPI1_CLK ==> SD_PE_WAKE_ODL */
+	PAD_CFG_GPI(GPP_E11, NONE, DEEP),
+	/* E12 : SPI1_MISO_IO1 ==> PEN_ALERT_ODL */
+	PAD_CFG_GPI(GPP_E12, NONE, DEEP),
+	/* E13 : SPI1_MOSI_IO0 ==> USB_C0_AUXN_DC */
+	PAD_CFG_GPO(GPP_E13, 0, DEEP),
+	/* E14 : DDPC_HPDA ==> SOC_EDP_HPD */
+	PAD_CFG_NF(GPP_E14, NONE, DEEP, NF1),
+	/* E15 : ISH_GP6 ==> TRACKPAD_INT_ODL */
+	PAD_CFG_GPI_APIC(GPP_E15, NONE, PLTRST, LEVEL, INVERT),
+	/* E16 : ISH_GP7 ==> NOT USED */
+	PAD_NC(GPP_E16, NONE),
+	/* E17 : THC0_SPI1_INT# ==> NOT USED */
+	PAD_NC(GPP_E17, NONE),
+	/* E18 : DDP1_CTRLCLK ==> USB_C0_LSX_SOC_TX */
+	PAD_CFG_NF(GPP_E18, NONE, DEEP, NF4),
+	/* E19 : DDP1_CTRLDATA ==> USB0_C0_LSX_SOC_RX_STRAP */
+	PAD_CFG_NF(GPP_E19, NONE, DEEP, NF4),
+	/* E20 : DDP2_CTRLCLK ==> USB_C1_LSX_SOC_TX */
+	PAD_CFG_NF(GPP_E20, NONE, DEEP, NF4),
+	/* E21 : DDP2_CTRLDATA ==> USB_C1_LSX_SOC_RX_STRAP */
+	PAD_CFG_NF(GPP_E21, NONE, DEEP, NF4),
+	/* E22 : DDPA_CTRLCLK ==> USB_C1_AUXP_DC: Retimer FW drives this pin */
+	PAD_NC(GPP_E22, NONE),
+	/* E23 : DDPA_CTRLDATA ==> USB_C1_AUXN_DC: Retimer FW drives this pin */
+	PAD_NC(GPP_E23, NONE),
+
+	/* F0  : CNV_BRI_DT ==> CNV_BRI_DT_STRAP */
+	PAD_CFG_NF(GPP_F0, NONE, DEEP, NF1),
+	/* F1  : CNV_BRI_RSP ==> NCV_BRI_RSP */
+	PAD_CFG_NF(GPP_F1, UP_20K, DEEP, NF1),
+	/* F2  : I2S2_TXD ==> CNV_RGI_DT_STRAP */
+	PAD_CFG_NF(GPP_F2, NONE, DEEP, NF1),
+	/* F3  : I2S2_RXD ==> CNV_RGI_RSP */
+	PAD_CFG_NF(GPP_F3, UP_20K, DEEP, NF1),
+	/* F4  : CNV_RF_RESET# ==> CNV_RF_RST_L */
+	PAD_CFG_NF(GPP_F4, NONE, DEEP, NF1),
+	/* F5  : MODEM_CLKREQ ==> CNV_CLKREQ0 */
+	PAD_CFG_NF(GPP_F5, NONE, DEEP, NF3),
+	/* F6  : CNV_PA_BLANKING ==> WWAN_WLAN_COEX3 */
+	PAD_CFG_NF(GPP_F6, NONE, DEEP, NF1),
+	/* F7  : GPPF7_STRAP */
+	PAD_NC(GPP_F7, NONE),
+	/* F8  : I2S_MCLK2_INOUT ==> HP_INT_L */
+	PAD_CFG_GPI_APIC(GPP_F8, UP_20K, DEEP, EDGE_BOTH, INVERT),
+	/* F9  : Reserved ==> NC */
+	/* F10 : GPPF10_STRAP */
+	PAD_NC(GPP_F10, DN_20K),
+	/* F11 : THC1_SPI2_CLK ==> NOT USED */
+	PAD_NC(GPP_F11, NONE),
+	/* F12 : GSXDOUT ==> NOT USED */
+	PAD_NC(GPP_F12, NONE),
+	/* F13 : GSXDOUT ==> WiFi_DISABLE_L */
+	PAD_CFG_GPO(GPP_F13, 1, DEEP),
+	/* F14 : GSXDIN ==> NOT USED */
+	PAD_NC(GPP_F14, NONE),
+	/* F15 : GSXSRESET# ==> NOT USED */
+	PAD_NC(GPP_F15, NONE),
+	/* F16 : GSXCLK ==> NOT USED */
+	PAD_NC(GPP_F16, NONE),
+	/* F17 : NOT USED */
+	PAD_NC(GPP_F17, NONE),
+	/* F18 : THC1_SPI2_INT# ==> NOT USED */
+	PAD_NC(GPP_F18, NONE),
+	/* F19 : SRCCLKREQ6# ==> WLAN_INT_L */
+	PAD_CFG_GPI_SCI_LOW(GPP_F19, NONE, DEEP, EDGE_SINGLE),
+	/* F20 : EXT_PWR_GATE# ==> EXT_PWR_GATE_L */
+	PAD_CFG_NF(GPP_F20, NONE, DEEP, NF1),
+	/* F21 : EXT_PWR_GATE2# ==> EXT_PWR_GATE2_L */
+	PAD_CFG_NF(GPP_F21, NONE, DEEP, NF1),
+	/* F22 : VNN_CTRL */
+	PAD_CFG_NF(GPP_F22, NONE, DEEP, NF1),
+	/* F23 : V1P05_CTRL */
+	PAD_CFG_NF(GPP_F23, NONE, DEEP, NF1),
+
+	/* H0  : GPPH0_BOOT_STRAP1 */
+	PAD_NC(GPP_H0, NONE),
+	/* H1  : GPPH1_BOOT_STRAP2 */
+	PAD_NC(GPP_H1, NONE),
+	/* H2  : GPPH2_BOOT_STRAP3 */
+	PAD_NC(GPP_H2, NONE),
+	/* H3  : SX_EXIT_HOLDOFF# ==> SD_PERST_L */
+	PAD_CFG_GPO(GPP_H3, 1, DEEP),
+	/* H4  : I2C2_SDA ==> PCH_I2C2_MISC_SDA */
+	PAD_CFG_NF(GPP_H4, NONE, DEEP, NF1),
+	/* H5  : I2C2_SCL ==> PCH_I2C2_MISC_SCL */
+	PAD_CFG_NF(GPP_H5, NONE, DEEP, NF1),
+	/* H6  : I2C3_SDA ==> NOT USED */
+	PAD_NC(GPP_H6, NONE),
+	/* H7  : I2C3_SCL ==> NOT USED */
+	PAD_NC(GPP_H7, NONE),
+	/* H8  : I2C4_SDA ==> WWAN_WLAN_COEX1 */
+	PAD_CFG_NF(GPP_H8, NONE, DEEP, NF2),
+	/* H9  : I2C4_SCL ==> WWAN_WLAN_COEX2 */
+	PAD_CFG_NF(GPP_H9, NONE, DEEP, NF2),
+	/* H10 : SRCCLKREQ4# ==> USB_C1_RT_FORCE_PWR */
+	PAD_CFG_GPO(GPP_H10, 1, DEEP),
+	/* H11 : SRCCLKREQ5# ==> WLAN_PERST_L */
+	PAD_CFG_GPO(GPP_H11, 1, DEEP),
+	/* H12 : M2_SKT2_CFG0 ==> NOT USED */
+	PAD_NC(GPP_H12, NONE),
+	/* H13 : M2_SKT2_CFG1 # ==> NOT USED */
+	PAD_NC(GPP_H13, NONE),
+	/* H14 : M2_SKT2_CFG2 # ==> NOT SUED */
+	PAD_NC(GPP_H14, NONE),
+	/* H15 : M2_SKT2_CFG3 # ==> NOT USED */
+	PAD_NC(GPP_H15, NONE),
+	/* H16 : DDPB_CTRLCLK ==> DDPB_HDMI_CTRLCLK */
+	PAD_CFG_NF(GPP_H16, NONE, DEEP, NF1),
+	/* H17 : DDPB_CTRLDATA ==> DDPB_HDMI_CTRLDATA */
+	PAD_CFG_NF(GPP_H17, NONE, DEEP, NF1),
+	/* H18 : CPU_C10_GATE# ==> CPU_C10_GATE_L */
+	PAD_CFG_NF(GPP_H18, NONE, DEEP, NF1),
+	/* H19 : TIME_SYNC0 ==> USER_PRES_FP_ODL */
+	PAD_CFG_GPI(GPP_H19, NONE, DEEP),
+	/* H20 : IMGCLKOUT1 ==> EN_MIPI_RCAM_PWR */
+	PAD_CFG_GPO(GPP_H20, 1, PLTRST),
+	/* H21 : IMGCLKOUT2 ==> NOT USED */
+	PAD_NC(GPP_H21, NONE),
+	/* H22 : IMGCLKOUT3 ==> NOT USED */
+	PAD_NC(GPP_H22, NONE),
+	/* H23 : IMGCLKOUT4 ==> NOT USED */
+	PAD_NC(GPP_H23, NONE),
+
+	/* R0 : HDA_BCLK ==> I2S0_HP_SCLK */
+	PAD_CFG_NF(GPP_R0, NONE, DEEP, NF2),
+	/* R1 : HDA_SYNC ==> I2S0_HP_SFRM */
+	PAD_CFG_NF(GPP_R1, NONE, DEEP, NF2),
+	/* R2 : HDA_SDO ==> I2S0_PCH_TX_HP_RX_STRAP */
+	PAD_CFG_NF(GPP_R2, DN_20K, DEEP, NF2),
+	/* R3 : HDA_SDIO ==> I2S0_PCH_RX_HP_TX */
+	PAD_CFG_NF(GPP_R3, NONE, DEEP, NF2),
+	/* R4 : HDA_RST# ==> HDA_RST_L */
+	PAD_CFG_NF(GPP_R4, NONE, DEEP, NF1),
+	/* R5 : HDA_SDI1 ==> I2S1_PCH_RX_SPKR_TX */
+	PAD_CFG_NF(GPP_R5, NONE, DEEP, NF2),
+	/* R6 : I2S1_TXD ==> I2S1_PCH_RX_SPKR_RX */
+	PAD_CFG_NF(GPP_R6, NONE, DEEP, NF2),
+	/* R7 : I2S1_SFRM ==> I2S1_SPKR_SFRM */
+	PAD_CFG_NF(GPP_R7, NONE, DEEP, NF2),
+
+	/* S0 : SNDW0_CLK ==> SNDW0_HP_CLK */
+	PAD_CFG_NF(GPP_S0, NONE, DEEP, NF1),
+	/* S1 : SNDW0_DATA ==> SNDW0_HP_DATA */
+	PAD_CFG_NF(GPP_S1, NONE, DEEP, NF1),
+	/* S2 : SNDW1_CLK ==> SNDW1_SPKR_CLK */
+	PAD_CFG_NF(GPP_S2, NONE, DEEP, NF1),
+	/* S3 : SNDW1_DATA ==> SNDW1_SPKR_DATA */
+	PAD_CFG_NF(GPP_S3, NONE, DEEP, NF1),
+	/* S4 : SNDW2_CLK ==> NOT USED */
+	PAD_NC(GPP_S4, NONE),
+	/* S5 : SNDW2_DATA ==> NOT USED */
+	PAD_NC(GPP_S5, NONE),
+	/* S6 : SNDW3_CLK ==> DMIC_CLK0 */
+	PAD_CFG_NF(GPP_S6, NONE, DEEP, NF2),
+	/* S7 : SNDW3_DATA ==> DMIC_DATA0 */
+	PAD_CFG_NF(GPP_S7, NONE, DEEP, NF2),
+
+	/* GPD0: BATLOW# ==> BATLOW_L */
+	PAD_CFG_NF(GPD0, NONE, DEEP, NF1),
+	/* GPD1: ACPRESENT ==> PCH_ACPRESENT */
+	PAD_CFG_NF(GPD1, NONE, DEEP, NF1),
+	/* GPD2: LAN_WAKE# ==> EC_PCH_WAKE_ODL */
+	PAD_CFG_NF(GPD2, NONE, DEEP, NF1),
+	/* GPD3: PWRBTN# ==> EC_PCH_PWR_BTN_ODL */
+	PAD_CFG_NF(GPD3, NONE, DEEP, NF1),
+	/* GPD4: SLP_S3# ==> SLP_S3_L */
+	PAD_CFG_NF(GPD4, NONE, DEEP, NF1),
+	/* GPD5: SLP_S4# ==> SLP_S4_L */
+	PAD_CFG_NF(GPD5, NONE, DEEP, NF1),
+	/* GPD6: SLP_A# ==> SLP_A_L */
+	PAD_CFG_NF(GPD6, NONE, DEEP, NF1),
+	/* GPD7: GPD7_STRAP */
+	PAD_CFG_GPI(GPD7, DN_20K, DEEP),
+	/* GPD8: SUSCLK ==> PCH_SUSCLK */
+	PAD_CFG_NF(GPD8, NONE, DEEP, NF1),
+	/* GPD9: SLP_WLAN# ==> SLP_WLAN_L */
+	PAD_CFG_NF(GPD9, NONE, DEEP, NF1),
+	/* GPD10: SLP_S5# ==> SLP_S5_L */
+	PAD_CFG_NF(GPD10, NONE, DEEP, NF1),
+	/* GPD11: LANPHYC ==> NC */
+};
+
+const struct pad_config *variant_base_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(gpio_table);
+	return gpio_table;
+}
diff --git a/src/mainboard/google/volteer/variants/malefor/include/variant/ec.h b/src/mainboard/google/volteer/variants/malefor/include/variant/ec.h
new file mode 100644
index 0000000000..33e79711f6
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/malefor/include/variant/ec.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef __VARIANT_EC_H__
+#define __VARIANT_EC_H__
+
+#include <baseboard/ec.h>
+
+#endif
diff --git a/src/mainboard/google/volteer/variants/malefor/include/variant/gpio.h b/src/mainboard/google/volteer/variants/malefor/include/variant/gpio.h
new file mode 100644
index 0000000000..55725ad59a
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/malefor/include/variant/gpio.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef VARIANT_GPIO_H
+#define VARIANT_GPIO_H
+
+#include <baseboard/gpio.h>
+
+/* Copied from baseboard and may need to change for the new variant. */
+
+#endif
diff --git a/src/mainboard/google/volteer/variants/malefor/memory.c b/src/mainboard/google/volteer/variants/malefor/memory.c
new file mode 100644
index 0000000000..75ac762a47
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/malefor/memory.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#include <baseboard/variants.h>
+
+static const struct mb_lpddr4x_cfg malefor_memcfg = {
+	/* DQ byte map */
+	.dq_map = {
+	{  3,  1,  0,  2,  4,  6,  7,  5,   /* Byte 0 */
+	  12, 13, 14, 15,  8,  9, 10, 11 }, /* Byte 1 */
+	{  0,  7,  1,  6,  2,  4,  3,  5,   /* Byte 2 */
+	   8, 15, 14,  9, 13, 10, 12, 11 }, /* Byte 3 */
+	{  3,  2,  0,  1,  4,  5,  6,  7,   /* Byte 4 */
+	  12, 13, 15, 14,  8,  9, 10, 11 }, /* Byte 5 */
+	{  6,  0,  1,  7,  5,  4,  2,  3,   /* Byte 6 */
+	  15, 14,  8,  9, 10, 12, 11, 13 }, /* Byte 7 */
+	{  5,  0,  1,  3,  4,  2,  7,  6,   /* Byte 0 */
+	  11, 14, 13, 12,  8,  9, 15, 10 }, /* Byte 1 */
+	{  3,  4,  2,  5,  0,  6,  1,  7,   /* Byte 2 */
+	  13, 12, 11, 10, 14, 15,  9,  8 }, /* Byte 3 */
+	{  3,  2,  1,  0,  5,  4,  7,  6,   /* Byte 4 */
+	  12, 13, 15, 14,  8, 11,  9, 10 }, /* Byte 5 */
+	{  3,  4,  2,  5,  1,  0,  7,  6,   /* Byte 6 */
+	  15, 14,  9,  8, 12, 10, 11, 13 }  /* Byte 7 */
+	},
+
+	/* DQS CPU<>DRAM map */
+	.dqs_map = {
+	/* Ch 0     1         2         3 */
+	{ 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
+	{ 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }
+	},
+
+	.ect = 0, /* Disable Early Command Training */
+};
+
+const struct mb_lpddr4x_cfg *variant_memory_params(void)
+{
+	return &malefor_memcfg;
+}
diff --git a/src/mainboard/google/volteer/variants/malefor/overridetree.cb b/src/mainboard/google/volteer/variants/malefor/overridetree.cb
new file mode 100644
index 0000000000..32204c58e7
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/malefor/overridetree.cb
@@ -0,0 +1,6 @@
+chip soc/intel/tigerlake
+
+	device domain 0 on
+	end
+
+end