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authorLinus Walleij <linus.walleij@linaro.org>2012-04-12 12:49:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-12 13:12:12 -0700
commit2f3972168353d355854d6381f1f360ce83b723e5 (patch)
tree78d1013f792083ca34925fba1ae30e71c7bbd1d5 /drivers/rtc
parent41c93088127df2579e8ca64010929ec9e41d5543 (diff)
downloadblackbird-op-linux-2f3972168353d355854d6381f1f360ce83b723e5.tar.gz
blackbird-op-linux-2f3972168353d355854d6381f1f360ce83b723e5.zip
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>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-pl031.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 692de7360e94..684ef4bbfce4 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -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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