<p>Patrick Rudolph has uploaded this change for <strong>review</strong>.</p><p><a href="https://review.coreboot.org/23585">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">libpayload/drivers/nvram: Add function to write RTC<br><br>Add a function to set the RTC to provided struct tm.<br><br>Change-Id: I17b4c1ee0dcc649738ac6a7400b087d07213eaf0<br>Signed-off-by: Patrick Rudolph <siro@das-labor.org><br>---<br>M payloads/libpayload/drivers/nvram.c<br>M payloads/libpayload/include/libpayload.h<br>2 files changed, 52 insertions(+), 0 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://review.coreboot.org:29418/coreboot refs/changes/85/23585/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/payloads/libpayload/drivers/nvram.c b/payloads/libpayload/drivers/nvram.c</span><br><span>index 9d3a9cd..6e2ebdc 100644</span><br><span>--- a/payloads/libpayload/drivers/nvram.c</span><br><span>+++ b/payloads/libpayload/drivers/nvram.c</span><br><span>@@ -160,3 +160,54 @@</span><br><span>    if (time->tm_year < 80)</span><br><span>                time->tm_year += 100;</span><br><span> }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/**</span><br><span style="color: hsl(120, 100%, 40%);">+ * Write the current time and date to the RTC</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * @param time A pointer to a broken-down time structure</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+void rtc_write_clock(struct tm *time)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+      u16 timeout = 10000;</span><br><span style="color: hsl(120, 100%, 40%);">+  u8 statusB;</span><br><span style="color: hsl(120, 100%, 40%);">+   u8 reg8;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+    while (nvram_updating())</span><br><span style="color: hsl(120, 100%, 40%);">+              if (!timeout--)</span><br><span style="color: hsl(120, 100%, 40%);">+                       return;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+     statusB = nvram_read(NVRAM_RTC_STATUSB);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+    if (time->tm_year > 100)</span><br><span style="color: hsl(120, 100%, 40%);">+                time->tm_year -= 100;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+    if (!(statusB & 0x04)) {</span><br><span style="color: hsl(120, 100%, 40%);">+          nvram_write(dec2bcd(time->tm_mon + 1), NVRAM_RTC_MONTH);</span><br><span style="color: hsl(120, 100%, 40%);">+           nvram_write(dec2bcd(time->tm_sec), NVRAM_RTC_SECONDS);</span><br><span style="color: hsl(120, 100%, 40%);">+             nvram_write(dec2bcd(time->tm_min), NVRAM_RTC_MINUTES);</span><br><span style="color: hsl(120, 100%, 40%);">+             nvram_write(dec2bcd(time->tm_mday), NVRAM_RTC_DAY);</span><br><span style="color: hsl(120, 100%, 40%);">+                if (!(statusB & 0x02)) {</span><br><span style="color: hsl(120, 100%, 40%);">+                  if (time->tm_hour > 12)</span><br><span style="color: hsl(120, 100%, 40%);">+                         reg8 = dec2bcd(time->tm_hour - 12) | 0x80;</span><br><span style="color: hsl(120, 100%, 40%);">+                 else</span><br><span style="color: hsl(120, 100%, 40%);">+                          reg8 = dec2bcd(time->tm_hour);</span><br><span style="color: hsl(120, 100%, 40%);">+             } else</span><br><span style="color: hsl(120, 100%, 40%);">+                        reg8 = dec2bcd(time->tm_hour);</span><br><span style="color: hsl(120, 100%, 40%);">+             nvram_write(reg8, NVRAM_RTC_HOURS);</span><br><span style="color: hsl(120, 100%, 40%);">+           nvram_write(dec2bcd(time->tm_year), NVRAM_RTC_YEAR);</span><br><span style="color: hsl(120, 100%, 40%);">+       } else {</span><br><span style="color: hsl(120, 100%, 40%);">+              nvram_write(time->tm_mon + 1, NVRAM_RTC_MONTH);</span><br><span style="color: hsl(120, 100%, 40%);">+            nvram_write(time->tm_sec, NVRAM_RTC_SECONDS);</span><br><span style="color: hsl(120, 100%, 40%);">+              nvram_write(time->tm_min, NVRAM_RTC_MINUTES);</span><br><span style="color: hsl(120, 100%, 40%);">+              nvram_write(time->tm_mday, NVRAM_RTC_DAY);</span><br><span style="color: hsl(120, 100%, 40%);">+         if (!(statusB & 0x02)) {</span><br><span style="color: hsl(120, 100%, 40%);">+                  if (time->tm_hour > 12)</span><br><span style="color: hsl(120, 100%, 40%);">+                         reg8 = (time->tm_hour - 12) | 0x80;</span><br><span style="color: hsl(120, 100%, 40%);">+                        else</span><br><span style="color: hsl(120, 100%, 40%);">+                          reg8 = time->tm_hour;</span><br><span style="color: hsl(120, 100%, 40%);">+              } else</span><br><span style="color: hsl(120, 100%, 40%);">+                        reg8 = time->tm_hour;</span><br><span style="color: hsl(120, 100%, 40%);">+              nvram_write(reg8, NVRAM_RTC_HOURS);</span><br><span style="color: hsl(120, 100%, 40%);">+           nvram_write(time->tm_year, NVRAM_RTC_YEAR);</span><br><span style="color: hsl(120, 100%, 40%);">+        }</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span>diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h</span><br><span>index 23226f3..5671efd 100644</span><br><span>--- a/payloads/libpayload/include/libpayload.h</span><br><span>+++ b/payloads/libpayload/include/libpayload.h</span><br><span>@@ -125,6 +125,7 @@</span><br><span> void nvram_write(u8 val, u8 addr);</span><br><span> int nvram_updating(void);</span><br><span> void rtc_read_clock(struct tm *tm);</span><br><span style="color: hsl(120, 100%, 40%);">+void rtc_write_clock(struct tm *tm);</span><br><span> /** @} */</span><br><span> </span><br><span> /**</span><br><span></span><br></pre><p>To view, visit <a href="https://review.coreboot.org/23585">change 23585</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/23585"/><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: I17b4c1ee0dcc649738ac6a7400b087d07213eaf0 </div>
<div style="display:none"> Gerrit-Change-Number: 23585 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: Patrick Rudolph <siro@das-labor.org> </div>