]> git.baikalelectronics.ru Git - kernel.git/commit
ARM: OMAP2+: l2c: squelch warning dump on power control setting
authorSekhar Nori <nsekhar@ti.com>
Mon, 14 Jul 2014 13:13:46 +0000 (18:43 +0530)
committerTony Lindgren <tony@atomide.com>
Mon, 14 Jul 2014 16:24:43 +0000 (09:24 -0700)
commitd04b356fa81c96fb0f64da168a7d6922a7f7ca76
treec56b117a9136ad1b302a54fd8b2f08d9b166669d
parentf3c4ded3454c11b7feb65089f962b516a9b67287
ARM: OMAP2+: l2c: squelch warning dump on power control setting

On OMAP SOCs using PL310 controllers, power_ctrl register is not
accessible from non-secure software even on PL310 versions which
support it. The secure code takes care of setting it up correctly
and power transitions are proven on these devices.

For example, AM437x has L2C-310 version r3p3 and ROM code on that
device 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@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
arch/arm/mach-omap2/omap4-common.c