drivers/rtc/rtc-pl031.c: enable clock on all ST variants
The ST variants of the PL031 all require bit 26 in the control register to be set before they work properly. Discovered this when testing on the Nomadik board where it would suprisingly just stand still. Signed-off-by: NLinus Walleij <linus.walleij@linaro.org> Cc: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> Cc: Alessandro Rubini <rubini@unipv.it> Cc: <stable@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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