clocksource/drivers/arm_global_timer: Fix maximum prescaler value

[ Upstream commit b34b9547cee41575a4fddf390f615570759dc999 ]

The prescaler in the "Global Timer Control Register bit assignments" is
documented to use bits [15:8], which means that the maximum prescaler
register value is 0xff.

Fixes: 171b45a4a70e ("clocksource/drivers/arm_global_timer: Implement rate compensation whenever source clock changes")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20240218174138.1942418-2-martin.blumenstingl@googlemail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clocksource/arm_global_timer.c b/drivers/clocksource/arm_global_timer.c
index 44a61dc6f93208c897f1379cbb1371191d29d7b4..e1c773bb55359c630a4d8623fe2076506509c71a 100644 (file)
--- a/drivers/clocksource/arm_global_timer.c
+++ b/drivers/clocksource/arm_global_timer.c
@@ -32,7 +32,7 @@
 #define GT_CONTROL_IRQ_ENABLE          BIT(2)  /* banked */
 #define GT_CONTROL_AUTO_INC            BIT(3)  /* banked */
 #define GT_CONTROL_PRESCALER_SHIFT      8
-#define GT_CONTROL_PRESCALER_MAX        0xF
+#define GT_CONTROL_PRESCALER_MAX        0xFF
 #define GT_CONTROL_PRESCALER_MASK       (GT_CONTROL_PRESCALER_MAX << \
                                         GT_CONTROL_PRESCALER_SHIFT)