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| author | Furquan Shaikh <furquan@google.com> | 2019-04-29 14:09:17 -0700 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2019-05-01 02:18:31 +0000 |
| commit | 4c8726574cb36fe0e836bc32fbd453f8770a2ff0 (patch) | |
| tree | 6a873d1f5c1ba5c25149ccc72d9367eea0622d1e /src/soc/intel | |
| parent | 517eda5ca48014ae53315f3afa731be7f39a20f6 (diff) | |
| download | coreboot-4c8726574cb36fe0e836bc32fbd453f8770a2ff0.tar.xz | |
soc/intel/common: Set RX_DISABLE for pads configured as NC
For GPIO pads that are configured as no-connect (PAD_NC), setting it
as GPI (with Rx enabled) leads to GPE0_STS being set
incorrectly. Though this is not an issue in practice (GPE0_EN is not
set, so no events triggered), it can confuse users when debugging GPE
related issues.
This change configures PAD_NC to have Rx disabled along with Tx to
ensure that it does not end up setting GPE0_STS bits for unwanted
GPIO pads.
P.S.: IOSSTATE config does not have a TxDRxD setting, so leaving that
configuration as is.
BUG=b:129235068
TEST=Verified that GPE0_STS bits are not set for pads that are marked
as PAD_NC.
Change-Id: I726cc7b86a94e7449352cd8a8806d4d775c593dc
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32514
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/gpio_defs.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/gpio_defs.h b/src/soc/intel/common/block/include/intelblocks/gpio_defs.h index 0ad3e5c32a..91d8f00a89 100644 --- a/src/soc/intel/common/block/include/intelblocks/gpio_defs.h +++ b/src/soc/intel/common/block/include/intelblocks/gpio_defs.h @@ -264,10 +264,16 @@ PAD_CFG0_TRIG_##trig | PAD_CFG0_RX_POL_NONE, \ PAD_PULL(pull) | PAD_CFG1_GPIO_DRIVER | PAD_IOSSTATE(TxDRxE)) -/* No Connect configuration for unused pad. - * NC should be GPI with Term as PU20K, PD20K, NONE depending upon default Term +/* + * No Connect configuration for unused pad. + * Both TX and RX are disabled. RX disabling is done to avoid unnecessary + * setting of GPI_STS. */ -#define PAD_NC(pad, pull) PAD_CFG_GPI(pad, pull, DEEP) +#define PAD_NC(pad, pull) \ + _PAD_CFG_STRUCT(pad, \ + PAD_FUNC(GPIO) | PAD_RESET(DEEP) | \ + PAD_CFG0_TX_DISABLE | PAD_CFG0_RX_DISABLE, \ + PAD_PULL(pull) | PAD_IOSSTATE(TxDRxE)) #if CONFIG(SOC_INTEL_COMMON_BLOCK_GPIO_LEGACY_MACROS) |