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From 890eafaa914317b2a67a4b0df9c3a5ea04d88f05 Mon Sep 17 00:00:00 2001
From: Matt DeVillier <matt.devillier@gmail.com>
Date: Fri, 18 Jul 2025 14:24:05 -0500
Subject: [PATCH 41/41] mb/lenovo/t480(s): Enable TBT support
Select the discrete TBT controller driver, and configure the necessary
GPIOs for the Alpine Ridge TBT controller to be fully functional.
Update the documentation w/r/t TBT functionality.
TEST=build/boot Lenovo T480, boot Linux, verify all TBT-related PCI
devices populated, lower USB-C port works for USB data and PCIe.
Change-Id: Ie5586fa72ed6819b9d1c37373c21605d39bad7b4
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
---
Documentation/mainboard/lenovo/skylake.md | 3 +--
src/mainboard/lenovo/sklkbl_thinkpad/Kconfig | 2 ++
src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c | 8 ++++----
.../lenovo/sklkbl_thinkpad/variants/t480s/gpio.c | 8 ++++----
4 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/Documentation/mainboard/lenovo/skylake.md b/Documentation/mainboard/lenovo/skylake.md
index 64e075e2cd..352d91b3ef 100644
--- a/Documentation/mainboard/lenovo/skylake.md
+++ b/Documentation/mainboard/lenovo/skylake.md
@@ -193,8 +193,6 @@ binaries if only flashing the `bios` region.
## Known Issues
-- Alpine Ridge Thunderbolt 3 controller does not work
- - Lower (right) USB-C port only works for charging/DP alt mode, not USB/PCIe data
- Some Fn+F{1-12} keys aren't handled correctly
- Nvidia dGPU is finicky
- Needs option ROM
@@ -206,6 +204,7 @@ binaries if only flashing the `bios` region.
## Verified Working
+- Alpine Ridge Thunderbolt 3 controller
- Integrated graphics init with libgfxinit
- video output: internal (eDP), miniDP
- ACPI support
diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig b/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig
index d69d94f638..c60b85af08 100644
--- a/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig
+++ b/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig
@@ -33,6 +33,7 @@ config BOARD_LENOVO_T480
bool
select BOARD_LENOVO_SKLKBL_THINKPAD_COMMON
select SOC_INTEL_KABYLAKE
+ select DRIVERS_INTEL_DTBT
select MEC1653_HAS_DEBUG_UNLOCK
select VARIANT_HAS_DGPU
@@ -40,6 +41,7 @@ config BOARD_LENOVO_T480S
bool
select BOARD_LENOVO_SKLKBL_THINKPAD_COMMON
select SOC_INTEL_KABYLAKE
+ select DRIVERS_INTEL_DTBT
select VARIANT_HAS_DGPU
config BOARD_LENOVO_T580
diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c
index f337843fd9..ffd2841e49 100644
--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c
+++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c
@@ -86,7 +86,7 @@ static const struct pad_config gpio_table[] = {
PAD_NC(GPP_C18, NONE),
PAD_NC(GPP_C19, NONE),
PAD_CFG_GPO(GPP_C20, 0, DEEP), /* EPRIVACY_ON */
- PAD_CFG_GPO(GPP_C21, 0, DEEP), /* TBT_FORCE_PWR */
+ PAD_CFG_GPO(GPP_C21, 1, PLTRST), /* TBT_FORCE_PWR */
PAD_CFG_GPI_SCI(GPP_C22, NONE, DEEP, EDGE_SINGLE, INVERT), /* -EC_SCI */
PAD_CFG_GPI_SCI(GPP_C23, NONE, DEEP, EDGE_SINGLE, INVERT), /* -EC_WAKE */
@@ -191,9 +191,9 @@ static const struct pad_config gpio_table[] = {
PAD_NC(GPP_G1, NONE),
PAD_NC(GPP_G2, NONE),
PAD_NC(GPP_G3, NONE),
- PAD_CFG_GPO(GPP_G4, 0, DEEP), /* TBT_RTD3_PWR_EN */
- PAD_CFG_GPO(GPP_G5, 0, DEEP), /* TBT_FORCE_USB_PWR */
- PAD_CFG_GPO(GPP_G6, 0, DEEP), /* -TBT_PERST */
+ PAD_CFG_GPO(GPP_G4, 1, PLTRST), /* TBT_RTD3_PWR_EN */
+ PAD_CFG_GPO(GPP_G5, 1, PLTRST), /* TBT_FORCE_USB_PWR */
+ PAD_CFG_GPO(GPP_G6, 1, PLTRST), /* -TBT_PERST */
PAD_CFG_GPI_SCI(GPP_G7, NONE, DEEP, LEVEL, INVERT), /* -TBT_PCIE_WAKE */
};
diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c
index 4f1c57390d..c24c1abb07 100644
--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c
+++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c
@@ -82,7 +82,7 @@ static const struct pad_config gpio_table[] = {
PAD_NC(GPP_C18, NONE),
PAD_NC(GPP_C19, NONE),
PAD_CFG_GPO(GPP_C20, 0, DEEP), /* EPRIVACY_ON */
- PAD_CFG_GPO(GPP_C21, 0, DEEP), /* TBT_FORCE_PWR */
+ PAD_CFG_GPO(GPP_C21, 1, PLTRST), /* TBT_FORCE_PWR */
PAD_CFG_GPI_SCI(GPP_C22, NONE, DEEP, EDGE_SINGLE, INVERT), /* -EC_SCI */
PAD_CFG_GPI_SCI(GPP_C23, NONE, DEEP, EDGE_SINGLE, INVERT), /* -EC_WAKE */
@@ -187,9 +187,9 @@ static const struct pad_config gpio_table[] = {
PAD_NC(GPP_G1, NONE),
PAD_NC(GPP_G2, NONE),
PAD_NC(GPP_G3, NONE),
- PAD_CFG_GPO(GPP_G4, 0, DEEP), /* TBT_RTD3_PWR_EN */
- PAD_CFG_GPO(GPP_G5, 0, DEEP), /* TBT_FORCE_USB_PWR */
- PAD_CFG_GPO(GPP_G6, 0, DEEP), /* -TBT_PERST */
+ PAD_CFG_GPO(GPP_G4, 1, PLTRST), /* TBT_RTD3_PWR_EN */
+ PAD_CFG_GPO(GPP_G5, 1, PLTRST), /* TBT_FORCE_USB_PWR */
+ PAD_CFG_GPO(GPP_G6, 1, PLTRST), /* -TBT_PERST */
PAD_CFG_GPI_SCI(GPP_G7, NONE, DEEP, LEVEL, INVERT), /* -TBT_PCIE_WAKE */
};
--
2.47.3
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