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authorMichael Niewöhner <foss@mniewoehner.de>2020-07-19 18:43:27 +0200
committerMichael Niewöhner <c0d3z3r0@review.coreboot.org>2020-08-30 21:10:13 +0000
commitf0b6b30c46049e9849474965c87c83e7540e25dc (patch)
treefa029b677359901f9957126b4c40340323dfb1a0 /src
parent803bd3c68272c61bf18b62de3779aab3f217fe6d (diff)
mb/system76/lemp9: enable TPM
L140CU has a TPM2 connected via SPI. Add the TPM device to the devicetree and enable it. According to Intel doc#615170-001, PIRQ is required for SPI TPM to work. Since the TPM is connected to GPP_A7, enable NF1 (PIRQA#) and set it as TPM interrupt in Kconfig. Note: The PCH maps either LPC TPM or SPI TPM to the same address and handles either LPC or SPI communication transparently. Thus we can use MAINBOARD_HAS_LPC_TPM here, which implements TPM via that address. Tested, but only polling works currently, because there is some upstream issue with the tpm_tis module in current Linux kernels. [1] [1] https://bugzilla.redhat.com/show_bug.cgi?id=1770021 Signed-off-by: Michael Niewöhner <foss@mniewoehner.de> Change-Id: I26d3b396fe1e99368e18fd3a6a9f02e3585b9f6e Reviewed-on: https://review.coreboot.org/c/coreboot/+/43641 Reviewed-by: Felix Singer <felixsinger@posteo.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
-rw-r--r--src/mainboard/system76/lemp9/Kconfig18
-rw-r--r--src/mainboard/system76/lemp9/devicetree.cb8
-rw-r--r--src/mainboard/system76/lemp9/gpio.h4
3 files changed, 14 insertions, 16 deletions
diff --git a/src/mainboard/system76/lemp9/Kconfig b/src/mainboard/system76/lemp9/Kconfig
index 3431de1988..ef7c89af2e 100644
--- a/src/mainboard/system76/lemp9/Kconfig
+++ b/src/mainboard/system76/lemp9/Kconfig
@@ -10,9 +10,8 @@ config BOARD_SPECIFIC_OPTIONS
select GENERIC_SPD_BIN
select INTEL_GMA_HAVE_VBT
select INTEL_LPSS_UART_FOR_CONSOLE
-# Chip select 2 is not yet supported by intel fast_spi
-# select MAINBOARD_HAS_SPI_TPM_CR50
-# select MAINBOARD_HAS_TPM2
+ select MAINBOARD_HAS_LPC_TPM
+ select MAINBOARD_HAS_TPM2
select NO_UART_ON_SUPERIO
select SOC_INTEL_COMETLAKE
select SOC_INTEL_COMMON_BLOCK_HDA
@@ -77,17 +76,12 @@ config VGA_BIOS_ID
string
default "8086,9b41"
+config TPM_PIRQ
+ hex
+ default 0x10 # GPP_A7/PIRQA#
+
config POST_DEVICE
bool
default n
-# Chip select 2 is not yet supported by intel fast_spi
-#config DRIVER_TPM_SPI_BUS
-# hex
-# default 0x0
-#
-#config DRIVER_TPM_SPI_CHIP
-# int
-# default 2
-
endif
diff --git a/src/mainboard/system76/lemp9/devicetree.cb b/src/mainboard/system76/lemp9/devicetree.cb
index 659ca89475..d00f20358a 100644
--- a/src/mainboard/system76/lemp9/devicetree.cb
+++ b/src/mainboard/system76/lemp9/devicetree.cb
@@ -238,12 +238,16 @@ chip soc/intel/cannonlake
device pci 1e.1 off end # UART #1
device pci 1e.2 off end # GSPI #0
device pci 1e.3 off end # GSPI #1
- device pci 1f.0 on end # LPC Interface
+ device pci 1f.0 on # LPC Interface
+ chip drivers/pc80/tpm # TPM
+ device pnp 0c31.0 on end
+ end
+ end
device pci 1f.1 off end # P2SB
device pci 1f.2 off end # Power Management Controller
device pci 1f.3 on end # Intel HDA
device pci 1f.4 on end # SMBus
- device pci 1f.5 on end # PCH SPI
+ device pci 1f.5 on end # PCH SPI
device pci 1f.6 off end # GbE
end
end
diff --git a/src/mainboard/system76/lemp9/gpio.h b/src/mainboard/system76/lemp9/gpio.h
index d06145d1a9..8e86647d52 100644
--- a/src/mainboard/system76/lemp9/gpio.h
+++ b/src/mainboard/system76/lemp9/gpio.h
@@ -76,8 +76,8 @@ static const struct pad_config gpio_table[] = {
PAD_CFG_NF(GPP_A6, NONE, DEEP, NF1),
// GSPI0
- // TODO - TPM_PIRQ#
- PAD_CFG_NC(GPP_A7),
+ // PIRQA# / TPM_PIRQ#
+ PAD_CFG_NF(GPP_A7, NONE, DEEP, NF1),
// LPC
// PM_CLKRUN# with pull-up