<p>Seunghwan Kim <strong>uploaded patch set #2</strong> to this change.</p><p><a href="https://review.coreboot.org/28439">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">mb/google/poppy/variants/nautilus: Bump VCC_SA voltage offset 75mV<br><br>Nautilus-Wifi with m3 AP got a halt issue during CTS test.<br><br>Nautilus-Wifi was FCS with Celeron AP first and also its PCB/BOM was<br>validated only with Celeron. Since Celeron deos not support turbo<br>boost mode, its steady power demend and lower CPU frequency may not<br>reflect the potential noise hidden inside the board.<br><br>Bumping VCC_SA voltage offset 75mV confirmed works to mitigate the<br>potential noise coupling to VCC_GT/SA, and we verified this change<br>makes this issue go away on Nautilus-Wifi board.<br><br>Nautilus-LTE doesn't show this issue, since it has 10L PCB, will have<br>better grounding and less noise/ripple than 8L PCB.<br><br>BUG=b:111417632<br>BRANCH=poppy<br>TEST=Verified CTS test pass without an issue.<br><br>Change-Id: Id13fcc36a5b6ed42620c66f57a7303f30bff1a50<br>Signed-off-by: Seunghwan Kim <sh_.kim@samsung.com><br>---<br>M src/mainboard/google/poppy/romstage.c<br>M src/mainboard/google/poppy/variants/baseboard/include/baseboard/variants.h<br>M src/mainboard/google/poppy/variants/nautilus/Makefile.inc<br>M src/mainboard/google/poppy/variants/nautilus/mainboard.c<br>M src/mainboard/google/poppy/variants/nautilus/memory.c<br>A src/mainboard/google/poppy/variants/nautilus/sku.c<br>6 files changed, 78 insertions(+), 21 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://review.coreboot.org:29418/coreboot refs/changes/39/28439/2</pre><p>To view, visit <a href="https://review.coreboot.org/28439">change 28439</a>. To unsubscribe, or for help writing mail filters, visit <a href="https://review.coreboot.org/settings">settings</a>.</p><div itemscope itemtype="http://schema.org/EmailMessage"><div itemscope itemprop="action" itemtype="http://schema.org/ViewAction"><link itemprop="url" href="https://review.coreboot.org/28439"/><meta itemprop="name" content="View Change"/></div></div>

<div style="display:none"> Gerrit-Project: coreboot </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-MessageType: newpatchset </div>
<div style="display:none"> Gerrit-Change-Id: Id13fcc36a5b6ed42620c66f57a7303f30bff1a50 </div>
<div style="display:none"> Gerrit-Change-Number: 28439 </div>
<div style="display:none"> Gerrit-PatchSet: 2 </div>
<div style="display:none"> Gerrit-Owner: Seunghwan Kim <sh_.kim@samsung.com> </div>
<div style="display:none"> Gerrit-Reviewer: Furquan Shaikh <furquan@google.com> </div>
<div style="display:none"> Gerrit-Reviewer: Marx Wang <marx.wang@intel.com> </div>
<div style="display:none"> Gerrit-Reviewer: build bot (Jenkins) <no-reply@coreboot.org> </div>