Subject: [PATCH v2] ARM: OMAP2+: l2c: squelch warning dump on power control setting

From: [email-masked] (Santosh Shilimkar)
Date: Mon, 14 Jul 2014 10:31:25 -0400

On Monday 14 July 2014 09:13 AM, Sekhar Nori wrote:
> 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 <[email-masked]>
> Tested-by: Felipe Balbi <[email-masked]>
> Signed-off-by: Sekhar Nori <[email-masked]>
> ---
> Only description updated since v1
> 
Thanks for update.
Acked-by: Santosh Shilimkar <[email-masked]>