mtd/html/faq general.xml,1.1,1.2

[jwboyer at infradead.org]

Update of /home/cvs/mtd/html/faq
In directory phoenix.infradead.org:/tmp/cvs-serv12014/faq

Modified Files:
	general.xml 
Log Message:
Add FAQ about parts that power on locked

Index: general.xml
===================================================================
RCS file: /home/cvs/mtd/html/faq/general.xml,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- general.xml	12 Mar 2005 13:48:22 -0000	1.1
+++ general.xml	31 Mar 2006 14:57:32 -0000	1.2
@@ -51,6 +51,26 @@
 	same flash chips have to wait.  So callers have to call unpoint() soon
 	after to release the chip again.</p>
 
+	<h3>I keep getting errors whenever I try to write or erase to my MTD device</h3>
+	<p>Some NOR chips power on with all of the eraseblocks in a locked state.
+	The MTD layer doesn't unlock these devices by default.  If you are 
+	accessing these devices from userspace, you can use the flash_unlock tool
+	to unlock the MTD device(s).  If you are using the MTD device as a
+	write-able root filesystem you will either need to have the boot loader
+	unlock the eraseblocks before booting the kernel, or add code to the MTD
+	map driver for your board to unlock them.</p>
+
+	<p>Some chips that are known to have this behavior:</p>
+	<table cellpadding="5" cellspacing="0" border="1">
+	<tr><td>Manufacturer</td>
+	<td>Intel</td>
+	</tr>
+
+	<tr><td>Part Number</td>
+	<td>28FxxxP30</td>
+	</tr>
+	</table>
+
 	<INCLUDE file="../inc/footer.tmpl" />
 </PAGE>