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Merge tag 'ux500-clksrc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into next/drivers

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From Linus Walleij:
Ux500 clocksource updates:
- Use relaxed readl() variant
- Fix a single comment

* tag 'ux500-clksrc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
  clocksource: dbx500-prcmu: comment cleanup
  clocksource: dbx500-prcmu: use relaxed readl variant

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson
2013-06-14 16:50:48 -07:00
parent f54ffe0fef 807eba55f7
commit 0d86331b4c
1 changed files with 5 additions and 6 deletions
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11
drivers/clocksource/clksrc-dbx500-prcmu.c
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@@ -10,7 +10,7 @@
* DBx500-PRCMU Timer * DBx500-PRCMU Timer
* The PRCMU has 5 timers which are available in a always-on * The PRCMU has 5 timers which are available in a always-on
* power domain. We use the Timer 4 for our always-on clock * power domain. We use the Timer 4 for our always-on clock
* source on DB8500 and Timer 3 on DB5500. * source on DB8500.
*/ */
#include <linux/clockchips.h> #include <linux/clockchips.h>
#include <linux/clksrc-dbx500-prcmu.h> #include <linux/clksrc-dbx500-prcmu.h>
@@ -30,15 +30,14 @@
static void __iomem *clksrc_dbx500_timer_base; static void __iomem *clksrc_dbx500_timer_base;
static cycle_t clksrc_dbx500_prcmu_read(struct clocksource *cs) static cycle_t notrace clksrc_dbx500_prcmu_read(struct clocksource *cs)
{ {
void __iomem *base = clksrc_dbx500_timer_base;
u32 count, count2; u32 count, count2;
do { do {
count = readl(clksrc_dbx500_timer_base + count = readl_relaxed(base + PRCMU_TIMER_DOWNCOUNT);
PRCMU_TIMER_DOWNCOUNT); count2 = readl_relaxed(base + PRCMU_TIMER_DOWNCOUNT);
count2 = readl(clksrc_dbx500_timer_base +
PRCMU_TIMER_DOWNCOUNT);
} while (count2 != count); } while (count2 != count);
/* Negate because the timer is a decrementing counter */ /* Negate because the timer is a decrementing counter */