<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p><font face="sans-serif" size="2">Tested-by: Matt Spinler
<a class="moz-txt-link-abbreviated" href="mailto:mspinler@linux.vnet.ibm.com">mspinler@linux.vnet.ibm.com</a></font></p>
<br>
<div class="moz-cite-prefix">On 7/27/2017 5:16 AM, Andrew Jeffery
wrote:<br>
</div>
<blockquote cite="mid:20170727101647.26960-3-andrew@aj.id.au"
type="cite">
<pre wrap="">For the AST2500 and compatible watchdog controllers the external reset
signal can be configured for push-pull or open-drain drive types, and in
the case of open-drain driving, active low or high.
Signed-off-by: Andrew Jeffery <a class="moz-txt-link-rfc2396E" href="mailto:andrew@aj.id.au"><andrew@aj.id.au></a>
---
Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
index f526b003b2e0..7aa885f620ef 100644
--- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
@@ -36,10 +36,18 @@ Optional properties:
- aspeed,interrupt: If property is present then interrupt CPU.
If not specified then don't interrupt CPU.
+ - aspeed,alt-boot: If property is present then boot from alternate block.
- aspeed,external-signal: If property is present then signal is sent to
external reset counter (only WDT1 and WDT2). If not
specified no external signal is sent.
- - aspeed,alt-boot: If property is present then boot from alternate block.
+ - aspeed,ext-pulse-duration: External signal pulse duration in microseconds
+
+Optional properties for AST2500-compatible watchdogs:
+ - aspeed,ext-push-pull: If aspeed,external-signal is present, set the pin's
+ drive type to push-pull. The default is open-drain.
+ - aspeed,ext-active-high: If aspeed,external-signal is present and and the pin
+ is configured as push-pull, then set the pulse
+ polarity to active-high. The default is active-low.
Example:
</pre>
</blockquote>
<br>
</body>
</html>