Fixes spurious timeouts which have been seen during testing SPI_SUNXI driver. The false timeouts disappear when number of bits reduced to 10 in workaround.
The false timeouts are caused by timer backward jumps.
Signed-off-by: Oskari Lemmela oskari@lemmela.net --- arch/arm/cpu/armv8/generic_timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv8/generic_timer.c b/arch/arm/cpu/armv8/generic_timer.c index c1706dcec1..2e06ee4ed2 100644 --- a/arch/arm/cpu/armv8/generic_timer.c +++ b/arch/arm/cpu/armv8/generic_timer.c @@ -66,7 +66,7 @@ unsigned long timer_read_counter(void) isb(); do { asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct)); - } while (((cntpct + 1) & GENMASK(10, 0)) <= 1); + } while (((cntpct + 1) & GENMASK(9, 0)) <= 1);
return cntpct; }