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-rw-r--r--arch/arm/plat-omap/dmtimer.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 64f407ee0f4e..08ccf8922520 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -551,6 +551,19 @@ void omap_dm_timer_stop(struct omap_dm_timer *timer)
if (l & OMAP_TIMER_CTRL_ST) {
l &= ~0x1;
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
+ defined(CONFIG_ARCH_OMAP4)
+ /* Readback to make sure write has completed */
+ omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ /*
+ * Wait for functional clock period x 3.5 to make sure that
+ * timer is stopped
+ */
+ udelay(3500000 / clk_get_rate(timer->fclk) + 1);
+ /* Ack possibly pending interrupt */
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG,
+ OMAP_TIMER_INT_OVERFLOW);
+#endif
}
}
EXPORT_SYMBOL_GPL(omap_dm_timer_stop);