[PATCH] ARM64: juno: disable NOR flash node by default

[olof@lixom.net (Olof Johansson)]

On Wed, Oct 28, 2015 at 10:39:55AM +0100, Linus Walleij wrote:
> After discussing on the mailing list it turns out that
> accessing the flash memory from the kernel can disrupt CPU
> sleep states and CPU hotplugging, so let's disable this
> DT node by default. Setups that want to access the flash
> can modify this entry to enable the flash again.
> 
> Quoting Sudeep Holla: "the firmware assumes the flash is
> always in read mode while Linux leaves NOR flash in
> "read id" mode after initialization."
> 
> Reported-by: Sudeep Holla <sudeep.holla@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Sudeep Holla <sudeep.holla@arm.com>
> Cc: Liviu Dudau <Liviu.Dudau@arm.com>
> Cc: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Leif Lindholm <leif.lindholm@arm.com>
> Cc: Ryan Harkin <ryan.harkin@linaro.org>
> Fixes: 5078f77e1443 "ARM64: juno: add NOR flash to device tree"
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ARM SoC folks: please apply this as a fix for the upcoming v4.4
> merge window, directly to the branch where the original commit
> resides (appears to be directly on the for-next branch or
> something).

Applied, thanks.


-Olof