diff options
| author | Seunghwan Kim <sh_.kim@samsung.com> | 2018-09-28 17:13:48 +0900 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-10-05 01:40:38 +0000 |
| commit | 00b539452ba44b4cac4b73dd97841ec87ba1d964 (patch) | |
| tree | 9b9f79f61c1bdd90dbc5aa33aa6639476ba0d2ab | |
| parent | 4e6b7907de07c9c7d4b01a6213a8e13e946398cb (diff) | |
| download | coreboot-00b539452ba44b4cac4b73dd97841ec87ba1d964.tar.xz | |
mb/google/poppy/variants/nautilus: Change SlowSlewRate settings for LTE sku
Nautilus-LTE sku shows abnormal reset symptom at high temperature chamber
test, but the root cause is unclear.
Experimentally, setting SlowSlewRate IA/GT/SA to 1/2 improves this abnormal
reset issue, so we would apply it until find root cause of this issue.
BUG=b:117130599
BRANCH=poppy
TEST=Built and passed on reliability test with modified coreboot
Change-Id: I7fa0041989113097e3b283dbcf4ca2a73629fe54
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.com>
Reviewed-on: https://review.coreboot.org/28785
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/mainboard/google/poppy/variants/nautilus/mainboard.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mainboard/google/poppy/variants/nautilus/mainboard.c b/src/mainboard/google/poppy/variants/nautilus/mainboard.c index b9f6314d1b..bacf1a4c32 100644 --- a/src/mainboard/google/poppy/variants/nautilus/mainboard.c +++ b/src/mainboard/google/poppy/variants/nautilus/mainboard.c @@ -86,6 +86,11 @@ void variant_devtree_update(void) cfg->usb2_ports[4].tx_emp_enable = USB2_PRE_EMP_ON; cfg->usb2_ports[4].pre_emp_bias = USB2_BIAS_56MV; cfg->usb2_ports[4].pre_emp_bit = USB2_HALF_BIT_PRE_EMP; + + /* Override SlowSlewRate settings */ + cfg->SlowSlewRateForIa = 0; + cfg->SlowSlewRateForGt = 0; + cfg->SlowSlewRateForSa = 0; break; default: |