bcm63xx: add driver for the internal hw trng on bcm6368

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31131 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm63xx/patches-3.3/102-MIPS-BCM63XX-add-support-for-ipsec-clock.patch

@@ -0,0 +1,43 @@
+From 69b21096e25889d7db7cfc159202ef0a16530e6b Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <florian@openwrt.org>
+Date: Wed, 25 Jan 2012 17:39:54 +0100
+Subject: [PATCH 15/63] MIPS: BCM63XX: add support for "ipsec" clock
+
+This module is only available on BCM6368 so far and does not require
+resetting the block.
+
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+---
+ arch/mips/bcm63xx/clk.c |   14 ++++++++++++++
+ 1 files changed, 14 insertions(+), 0 deletions(-)
+
+--- a/arch/mips/bcm63xx/clk.c
++++ b/arch/mips/bcm63xx/clk.c
+@@ -224,6 +224,18 @@ static struct clk clk_xtm = {
+ };
+ 
+ /*
++ * IPsec clock
++ */
++static void ipsec_set(struct clk *clk, int enable)
++{
++	bcm_hwclock_set(CKCTL_6368_IPSEC_EN, enable);
++}
++
++static struct clk clk_ipsec = {
++	.set	= ipsec_set,
++};
++
++/*
+  * Internal peripheral clock
+  */
+ static struct clk clk_periph = {
+@@ -280,6 +292,8 @@ struct clk *clk_get(struct device *dev,
+ 		return &clk_periph;
+ 	if (BCMCPU_IS_6358() && !strcmp(id, "pcm"))
+ 		return &clk_pcm;
++	if (BCMCPU_IS_6368() && !strcmp(id, "ipsec"))
++		return &clk_ipsec;
+ 	return ERR_PTR(-ENOENT);
+ }
+