[PATCH v3 5/7] ARM: pxa: add rtc dummy clock

[Russell King - ARM Linux]

On Fri, Feb 24, 2012 at 12:00:49AM +0800, Haojian Zhuang wrote:
> sa1100-rtc driver could be shared among sa1100/pxa/mmp series silicon.
> Since clk is used in mmp series silicon, add dummy clock support in
> pxa also.
> 
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> ---
>  arch/arm/mach-pxa/pxa25x.c |    1 +
>  arch/arm/mach-pxa/pxa27x.c |    1 +
>  arch/arm/mach-pxa/pxa3xx.c |    1 +
>  arch/arm/mach-pxa/pxa95x.c |    1 +
>  4 files changed, 4 insertions(+), 0 deletions(-)

This is missing changes in arch/arm/mach-pxa/clock.c to prevent clk_enable()
etc oopsing when called with a NULL clock.