[U-Boot] [U-Boot, u-boot, 2/2] ARM: beagle_x15: prevent DCAN1 _wait_target_disable failure in kernel

[Tom Rini]

On Thu, Jun 25, 2015 at 10:25:50AM +0300, Roger Quadros wrote:

> If board is booted with transitions happening on DCAN1 pins then
> the following warning is seen in the kernel at boot when the
> hwmod layer initializes.
> 
> "omap_hwmod: dcan1: _wait_target_disable failed"
> 
> This is because DCAN1 module's SWAKEUP mechanism is broken
> and it fails to correctly turn OFF if it sees a transition on the
> DCAN1 pins. Suggested workaround is to keep DCAN1 pins in safe mode
> while enabling/disabling DCAN1 module.
> 
> The hwmod layer enables and disables all modules at boot
> and we have no opportunity to put the DCAN1 pins in safe mode
> at that point.
> 
> DCAN1 is not used by u-boot so it doesn't matter to it if these
> pins are in safe mode. The kernel driver correctly configures
> the right mode when DCAN1 is active.
> 
> Signed-off-by: Roger Quadros <rogerq at ti.com>

With %s/PULLUP/PULL_UP/ based on the DRA7xx patch, applied to
u-boot/master, thanks!

-- 
Tom
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