[PATCH] serial/amba-pl011: move custom pin control to driver

[Shawn Guo]

On Wed, May 23, 2012 at 09:18:46PM +0200, Linus Walleij wrote:
> From: Linus Walleij <linus.walleij at linaro.org>
> 
> We had a boot regression in Ux500 in the merge window because
> two orthogonal pin control schemes for the PL011 were merged
> at the same time:
> 
> - One using the .init() and .exit() hooks into the platform
>   for Ux500 putting the pins into default vs sleep state
>   respectively as the port was started/stopped.
>   commit a09806607fd20bed2f8c41fe22793386790a14aa
>   "ARM: ux500: switch to using pinctrl for uart0"
> 
> - One hogging the default setting at PL011 probe()
>   commit 258e055111d3cde2607e0d04eb91da2f7a59b591
>   "serial: amba-pl011: adopt pinctrl support"
> 
> To get a solution that works for both let's scrap the stuff
> in the platform callbacks, instead have the driver itself
> select default and sleep states when the port is
> started/stopped. Hopefully this works for all clients.
> Platform callbacks are bad for device tree migration anyway,
> so this rids us of another problem in Ux500.
> 
> Cc: linux-serial at vger.kernel.org
> Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> Cc: Shawn Guo <shawn.guo at linaro.org>
> Cc: Russell King <rmk+kernel at arm.linux.org.uk>
> Reported-by: Lee Jones <lee.jones at linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>

On imx28:

Tested-by: Shawn Guo <shawn.guo at linaro.org>