[U-Boot] [PATCH] ARM: stm32f7: fix prescaler calculation of timer

[Bo Shen]

As the timer 2 is on APB1 bus, the maximum of clock frequency of APB1 timer
clock is half of SYSCLK. Then to calculate the timer prescaler for timer 2
which need to be divided by 2.

Signed-off-by: Bo Shen <voice.shen at gmail.com>
---
 arch/arm/mach-stm32/stm32f7/timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-stm32/stm32f7/timer.c b/arch/arm/mach-stm32/stm32f7/timer.c
index c15f8bb..b04c101 100644
--- a/arch/arm/mach-stm32/stm32f7/timer.c
+++ b/arch/arm/mach-stm32/stm32f7/timer.c
@@ -26,7 +26,7 @@ int timer_init(void)
 	/* Stop the timer */
 	writel(readl(&gpt1_regs_ptr->cr1) & ~GPT_CR1_CEN, &gpt1_regs_ptr->cr1);
 
-	writel((CONFIG_SYS_CLK_FREQ/CONFIG_SYS_HZ_CLOCK) - 1,
+	writel((CONFIG_SYS_CLK_FREQ / 2 / CONFIG_SYS_HZ_CLOCK) - 1,
 						&gpt1_regs_ptr->psc);
 
 	/* Configure timer for auto-reload */
-- 
2.7.4