Commit 2f397216 authored Apr 12, 2012 by Linus Walleij Committed by Linus Torvalds Apr 12, 2012

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: Linus 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus 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);

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