diff options
| -rw-r--r-- | drivers/devfreq/m4m-hwmon.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/devfreq/m4m-hwmon.c b/drivers/devfreq/m4m-hwmon.c index ceb99575b67c..51b077119cf3 100644 --- a/drivers/devfreq/m4m-hwmon.c +++ b/drivers/devfreq/m4m-hwmon.c @@ -50,6 +50,9 @@ #define CYC_CNTR_IDX 0 #define WASTED_CYC_CNTR_IDX 1 +/* counter is 28-bit */ +#define CNT_MAX 0x0FFFFFFFU + struct m4m_counter { int idx; u32 event_mask; @@ -144,7 +147,7 @@ static unsigned long _mon_get_count(struct m4m_hwmon *m, } if (ov) - cnt = U32_MAX - start + cur_cnt; + cnt = CNT_MAX - start + cur_cnt; else cnt = cur_cnt - start; @@ -160,7 +163,11 @@ static unsigned long mon_get_count(struct m4m_hwmon *m, static inline void mon_set_limit(struct m4m_hwmon *m, enum request_group grp, unsigned int limit) { - u32 start = U32_MAX - limit; + u32 start; + + if (limit >= CNT_MAX) + limit = CNT_MAX; + start = CNT_MAX - limit; writel_relaxed(start, EVCNTR(m, m->cntr[grp].idx)); m->cntr[grp].last_start = start; |