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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 02:21:03 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 02:21:03 +0400
commitacc952c1f373bf3f66cc7a10680eee1762bed40b (patch)
treede1135ffe304f4d8e53d282e5bb1bde5db04e0ae /arch/arm/mach-at91/at91rm9200_time.c
parent57e964e1ae9bd4f699ae1074430bcf81a9a11377 (diff)
parent40ba95fdf158713377d47736b1b3a9d75f4f2515 (diff)
downloadlinux-acc952c1f373bf3f66cc7a10680eee1762bed40b.tar.xz
Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Cleanups on various subarchitectures Cleanup patches for various ARM platforms and some of their associated drivers, the bulk of these is for mach-91. Arnd ended up pulling in the restart branch from Russell in order to fix up some simple but annoying merge conflicts. * tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (44 commits) arm/at91: fix build of stamp9g20 ARM: u300: delete memory.h MAINTAINERS: add maintainer entry for Picochip picoxcell ARM: picoxcell: move io mappings to common.c ARM: picoxcell: don't reserve irq_descs ARM: picoxcell: remove mach/memory.h ARM: at91: delete the pcontrol_g20_defconfig arm/tegra: Remove code that's ifndef CONFIG_ARM_GIC arm/tegra: remove unused defines arm/tegra: fix variable formatting in makefile ARM: davinci: vpif: move code to driver core header from platform ARM: at91/gpio: fix display of number of irq setuped ARM: at91/gpio: drop PIN_BASE ARM: at91/udc: use gpio_is_valid to check the gpio ARM: at91/ohci: use gpio_is_valid to check the gpio ARM: at91/nand: use gpio_is_valid to check the gpio ARM: at91/mmc: use gpio_is_valid to check the gpio ARM: at91/ide: use gpio_is_valid to check the gpio ARM: at91/pata: use gpio_is_valid to check the gpio ARM: at91/soc: use gpio_is_valid to check the gpio ...
Diffstat (limited to 'arch/arm/mach-at91/at91rm9200_time.c')
-rw-r--r--arch/arm/mach-at91/at91rm9200_time.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index 1dd69c85dfec..a028cdf8f974 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -32,6 +32,8 @@ static unsigned long last_crtr;
static u32 irqmask;
static struct clock_event_device clkevt;
+#define RM9200_TIMER_LATCH ((AT91_SLOW_CLOCK + HZ/2) / HZ)
+
/*
* The ST_CRTR is updated asynchronously to the master clock ... but
* the updates as seen by the CPU don't seem to be strictly monotonic.
@@ -74,8 +76,8 @@ static irqreturn_t at91rm9200_timer_interrupt(int irq, void *dev_id)
if (sr & AT91_ST_PITS) {
u32 crtr = read_CRTR();
- while (((crtr - last_crtr) & AT91_ST_CRTV) >= LATCH) {
- last_crtr += LATCH;
+ while (((crtr - last_crtr) & AT91_ST_CRTV) >= RM9200_TIMER_LATCH) {
+ last_crtr += RM9200_TIMER_LATCH;
clkevt.event_handler(&clkevt);
}
return IRQ_HANDLED;
@@ -116,7 +118,7 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
case CLOCK_EVT_MODE_PERIODIC:
/* PIT for periodic irqs; fixed rate of 1/HZ */
irqmask = AT91_ST_PITS;
- at91_sys_write(AT91_ST_PIMR, LATCH);
+ at91_sys_write(AT91_ST_PIMR, RM9200_TIMER_LATCH);
break;
case CLOCK_EVT_MODE_ONESHOT:
/* ALM for oneshot irqs, set by next_event()