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authorYe.Li <Ye.Li@freescale.com>2014-08-20 17:18:24 +0800
committerStefano Babic <sbabic@denx.de>2014-09-09 16:30:40 +0200
commit4aa7ac30a7173934f32db466bd4592cd292e7cc9 (patch)
tree14572029507d437b8ddf842bd1d66c4b2ad233e5
parentdc73cbe7b05851a3ff76beabdc0589d2b3ebb9a3 (diff)
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iMX6: Disable the L2 before chaning the PL310 latency
The Latency parameters of PL310 Tag RAM latency control register and Data RAM Latency control register are set in L2 cache enable. And setting these registers must have PL310 NOT enabled. But when using Plugin mode boot, the PL310 is enabled by bootrom. The patch disables the PL310 before applying this setting. Signed-off-by: Ye.Li <Ye.Li@freescale.com>
-rw-r--r--arch/arm/cpu/armv7/mx6/soc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index ac84a1f..be4bf24 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -430,6 +430,9 @@ void v7_outer_cache_enable(void)
}
#endif
+ /* Must disable the L2 before changing the latency parameters */
+ clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+
writel(0x132, &pl310->pl310_tag_latency_ctrl);
writel(0x132, &pl310->pl310_data_latency_ctrl);