diff options
Diffstat (limited to 'drivers/clocksource/bcm_kona_timer.c')
| -rw-r--r-- | drivers/clocksource/bcm_kona_timer.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c index 7e3fd375a627..92f6e4deee74 100644 --- a/drivers/clocksource/bcm_kona_timer.c +++ b/drivers/clocksource/bcm_kona_timer.c @@ -66,10 +66,10 @@ static void kona_timer_disable_and_clear(void __iomem *base) } -static void +static int kona_timer_get_counter(void __iomem *timer_base, uint32_t *msw, uint32_t *lsw) { - int loop_limit = 4; + int loop_limit = 3; /* * Read 64-bit free running counter @@ -83,18 +83,19 @@ kona_timer_get_counter(void __iomem *timer_base, uint32_t *msw, uint32_t *lsw) * if new hi-word is equal to previously read hi-word then stop. */ - while (--loop_limit) { + do { *msw = readl(timer_base + KONA_GPTIMER_STCHI_OFFSET); *lsw = readl(timer_base + KONA_GPTIMER_STCLO_OFFSET); if (*msw == readl(timer_base + KONA_GPTIMER_STCHI_OFFSET)) break; - } + } while (--loop_limit); if (!loop_limit) { pr_err("bcm_kona_timer: getting counter failed.\n"); pr_err(" Timer will be impacted\n"); + return -ETIMEDOUT; } - return; + return 0; } static int kona_timer_set_next_event(unsigned long clc, @@ -112,8 +113,11 @@ static int kona_timer_set_next_event(unsigned long clc, uint32_t lsw, msw; uint32_t reg; + int ret; - kona_timer_get_counter(timers.tmr_regs, &msw, &lsw); + ret = kona_timer_get_counter(timers.tmr_regs, &msw, &lsw); + if (ret) + return ret; /* Load the "next" event tick value */ writel(lsw + clc, timers.tmr_regs + KONA_GPTIMER_STCM0_OFFSET); |