drivers: timer: Disable prescalar for TI DM Timer

The timer count calculations are done with the assumption that the prescalar is disabled. When using u-boot's SPL as an early boot stage, the omap timer driver enables the prescalar leaving this driver to calculate incorrect counts. So explicitly disable the prescalar to match the driver expectation. Signed-off-by: Abe Kohandel <[email protected]>
yishai1999 · Nov 27, 2024 · 5d5407e · 5d5407e
1 parent db290a6
commit 5d5407e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/timer/ti_dmtimer.c b/drivers/timer/ti_dmtimer.c
@@ -138,6 +138,9 @@ static int sys_clock_driver_init(void)
 
 	IRQ_CONNECT(TIMER_IRQ_NUM, TIMER_IRQ_PRIO, ti_dmtimer_isr, NULL, TIMER_IRQ_FLAGS);
 
+	/* Disable prescalar */
+	TI_DM_TIMER_WRITE(0, TCLR, PRE);
+
 	/* Select autoreload mode */
 	TI_DM_TIMER_WRITE(1, TCLR, AR);