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Commit 2f397216 authored by Linus Walleij's avatar Linus Walleij Committed by Linus Torvalds
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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: default avatarLinus 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 41c93088

drivers/rtc/rtc-pl031.c

+1 −2
Original line number Diff line number Diff line
@@ -339,8 +339,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id) 
	dev_dbg(&adev->dev, "revision = 0x%01x\n", ldata->hw_revision);



	/* Enable the clockwatch on ST Variants */

	if ((ldata->hw_designer == AMBA_VENDOR_ST) &&

	    (ldata->hw_revision > 1))

	if (ldata->hw_designer == AMBA_VENDOR_ST)

		writel(readl(ldata->base + RTC_CR) | RTC_CR_CWEN,

		       ldata->base + RTC_CR);