ROM code on AM437x does not support writing to L2C-310 power control
register. The L2C driver, however, tries writing to this register for
all revisions >= r3p0.
This leads to a warning dump on boot which leads most users to believe
that L2 cache is non-functional.
Since the problem is understood, and cannot be addressed through software,
replace the warning with a pr_info() while maintaining the WARN_ON() for
other truly unexpected scenarios.
Reported-by: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Sekhar Nori <nsekhar@xxxxxx>
---
arch/arm/mach-omap2/omap4-common.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
index 326cd98..9139729 100644
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -188,6 +188,10 @@ static void omap4_l2c310_write_sec(unsigned long val, unsigned reg)
smc_op = OMAP4_MON_L2X0_PREFETCH_INDEX;
break;
+ case L310_POWER_CTRL:
+ pr_info_once("OMAP L2C310: ROM does not support power control setting\n");
+ return;
+
default:
WARN_ONCE(1, "OMAP L2C310: ignoring write to reg 0x%x\n", reg);
return;
--
1.7.10.1
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