From: Anton Blanchard <anton@samba.org>
Subject: Re: [PATCH 05/17] pseries: Enabled the PFO-based RNG accelerator
Date: Thu, 22 Mar 2012 20:55:56 +1100
Message-ID: <20120322205556.054c6169@kryten>
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To: Kent Yoder <key@linux.vnet.ibm.com>
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Hi,

+#if defined(CONFIG_HW_RANDOM_PSERIES) || \
+	defined(CONFIG_HW_RANDOM_PSERIES_MODULE)
+#define OV5_PFO_HW_RNG		0x80	/* PFO Random Number
Generator */ +#else
+#define OV5_PFO_HW_RNG		0x00
+#endif

Milton tipped me off about this. We really don't want to be doing
ibm,client-architecture reboots every time a config option is changed.

Let's just hardwire it on.

Anton