diff options
| author | Reka Norman <rekanorman@google.com> | 2022-07-01 11:14:43 +1000 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-07-04 14:04:18 +0000 |
| commit | 42dae32e6ca7c832a197b9f7345c44976beb1322 (patch) | |
| tree | 7ef57ecb24fb79768c41690a9ea1f699134ceb2c /src/mainboard/google/brya/variants/baseboard | |
| parent | 5d9b8a96327cde7e6c0f2db4380af1c8f67512d8 (diff) | |
mb/google/nissa: Lock PLT_RST_L pin
There is a requirement that the TPM RST signal cannot be asserted by
software. On nissa this is PLT_RST_L, so lock this pin to prevent it
being reconfigured as a GPIO.
BUG=b:216671701
TEST=Try to change GPP_B13 from the kernel:
$ echo 677 > /sys/class/gpio/export
$ echo out > /sys/class/gpio/gpio677/direction
$ echo 0 > /sys/class/gpio/gpio677/value
$ echo 1 > /sys/class/gpio/gpio677/value
GSC console doesn't show "PLT_RST_L ASSERTED" / "PLT_RST_L DEASSERTED"
Change-Id: Id5d64b4b028e4f63c4acb05cd8632d0642866688
Signed-off-by: Reka Norman <rekanorman@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65591
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Diffstat (limited to 'src/mainboard/google/brya/variants/baseboard')
| -rw-r--r-- | src/mainboard/google/brya/variants/baseboard/nissa/gpio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mainboard/google/brya/variants/baseboard/nissa/gpio.c b/src/mainboard/google/brya/variants/baseboard/nissa/gpio.c index df1793d0ed..6591a6cd02 100644 --- a/src/mainboard/google/brya/variants/baseboard/nissa/gpio.c +++ b/src/mainboard/google/brya/variants/baseboard/nissa/gpio.c @@ -78,7 +78,7 @@ static const struct pad_config gpio_table[] = { /* 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), + PAD_CFG_NF_LOCK(GPP_B13, NONE, NF1, LOCK_CONFIG), /* B14 : SPKR ==> GPP_B14_STRAP */ PAD_NC_LOCK(GPP_B14, NONE, LOCK_CONFIG), /* B15 : NC */ |