diff options
| author | Kan Yan <kyan@google.com> | 2016-06-30 13:46:56 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-08-11 22:30:34 +0200 |
| commit | 7f3ecedd776dc41a4d5dbaab8ef8146b8ba38ae3 (patch) | |
| tree | 6c4cf567361e6f3e0fedd7c6506add52a736fed3 | |
| parent | 785ff1b7dbbaa276c4ce9fc1663736e1647886c1 (diff) | |
| download | coreboot-7f3ecedd776dc41a4d5dbaab8ef8146b8ba38ae3.tar.xz | |
soc/qualcomm/ipq40xx: Reduce the delay in I2C.
3ms delay was found in testing to be sufficient for
qup_i2c_write_fifo_flush(), but 1 additional ms was added to give
additional headroom.
Change the Delay from 10ms to 4ms.
BUG=b:28942403
TEST=Boot up Gale board and the TPM functions normally.
BRANCH=None
Change-Id: I6821e2a101cc44e11d74eb6a6215aa9b848ae8c6
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: d93520fab15c5695ea18db21d0f3b24a108f204d
Original-Change-Id: I202f5b8a1ef62bb039c56ba5a25b48b205cf4a67
Original-Signed-off-by: Kan Yan <kyan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/357961
Original-Reviewed-by: Suresh Rajashekara <sureshraj@chromium.org>
Original-Reviewed-by: SARAVANAKUMAR SUDALAI <ssudalai@qti.qualcomm.com>
Reviewed-on: https://review.coreboot.org/16126
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
| -rw-r--r-- | src/soc/qualcomm/ipq40xx/qup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/soc/qualcomm/ipq40xx/qup.c b/src/soc/qualcomm/ipq40xx/qup.c index d2c1f282b6..9276e145bb 100644 --- a/src/soc/qualcomm/ipq40xx/qup.c +++ b/src/soc/qualcomm/ipq40xx/qup.c @@ -175,7 +175,7 @@ static inline qup_return_t qup_i2c_write_fifo_flush(blsp_qup_id_t id) qup_write32(QUP_ADDR(id, QUP_OPERATIONAL), OUTPUT_SERVICE_FLAG); - mdelay(10); /* TPM seems to need this */ + mdelay(4); /* TPM seems to need this */ ret = qup_fifo_wait_while(id, OUTPUT_FIFO_NOT_EMPTY); if (ret) |