<p>Martin Roth has uploaded this change for <strong>review</strong>.</p><p><a href="https://review.coreboot.org/26950">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">mainboard/google/kahlee: Use 66MHz SPI clock for fast read<br><br>Looking at the 100MHz signal, we were violating the timing requirements.<br>66MHz still isn't great, but it's a good tradeoff between improving<br>the signal and losing boot speed time.<br><br>This slows down the boot time by about 20mS.<br><br>BUG=b:109583457<br>TEST=Boot grunt, look at signal on scope<br><br>Change-Id: I7ce70c992822dd17c5877226e74c1890660768c6<br>Signed-off-by: Martin Roth <martinroth@google.com><br>---<br>M src/mainboard/google/kahlee/bootblock/bootblock.c<br>1 file changed, 1 insertion(+), 1 deletion(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://review.coreboot.org:29418/coreboot refs/changes/50/26950/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/src/mainboard/google/kahlee/bootblock/bootblock.c b/src/mainboard/google/kahlee/bootblock/bootblock.c</span><br><span>index 8f124b3..7e6524d 100644</span><br><span>--- a/src/mainboard/google/kahlee/bootblock/bootblock.c</span><br><span>+++ b/src/mainboard/google/kahlee/bootblock/bootblock.c</span><br><span>@@ -44,7 +44,7 @@</span><br><span> </span><br><span>     /* Set SPI speeds before verstage. Needed for TPM */</span><br><span>         sb_set_spi100(SPI_SPEED_33M,            /* Normal */</span><br><span style="color: hsl(0, 100%, 40%);">-                    SPI_SPEED_100M,         /* Fast   */</span><br><span style="color: hsl(120, 100%, 40%);">+                  SPI_SPEED_66M,          /* Fast   */</span><br><span>                         SPI_SPEED_66M,          /* AltIO  */</span><br><span>                         SPI_SPEED_66M);         /* TPM    */</span><br><span> </span><br><span></span><br></pre><p>To view, visit <a href="https://review.coreboot.org/26950">change 26950</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/26950"/><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: newchange </div>
<div style="display:none"> Gerrit-Change-Id: I7ce70c992822dd17c5877226e74c1890660768c6 </div>
<div style="display:none"> Gerrit-Change-Number: 26950 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: Martin Roth <martinroth@google.com> </div>