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[v2] rtc: brcmstb-waketimer: Set wktmr prescaler

Message ID 1519675798-26720-1-git-send-email-justin.chen@broadcom.com
State Accepted
Headers show
Series [v2] rtc: brcmstb-waketimer: Set wktmr prescaler | expand

Commit Message

Justin Chen Feb. 26, 2018, 8:09 p.m. UTC 
The HW default is one tick per second, however instead of assuming this,
lets make sure the waketimer is actually one tick per second before
arming the alarm.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Justin Chen <justinpopo6@gmail.com>
---
 drivers/rtc/rtc-brcmstb-waketimer.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Alexandre Belloni March 1, 2018, 1:46 p.m. UTC | #1 
On 26/02/2018 at 12:09:58 -0800, Justin Chen wrote:
> The HW default is one tick per second, however instead of assuming this,
> lets make sure the waketimer is actually one tick per second before
> arming the alarm.
> 
> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
> Signed-off-by: Justin Chen <justinpopo6@gmail.com>
> ---
>  drivers/rtc/rtc-brcmstb-waketimer.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
Applied, thanks.
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Patch

diff --git a/drivers/rtc/rtc-brcmstb-waketimer.c b/drivers/rtc/rtc-brcmstb-waketimer.c
index 796ac79..231b2f7 100644
--- a/drivers/rtc/rtc-brcmstb-waketimer.c
+++ b/drivers/rtc/rtc-brcmstb-waketimer.c
@@ -60,6 +60,9 @@  static void brcmstb_waketmr_set_alarm(struct brcmstb_waketmr *timer,
 {
 	brcmstb_waketmr_clear_alarm(timer);
 
+	/* Make sure we are actually counting in seconds */
+	writel_relaxed(timer->rate, timer->base + BRCMSTB_WKTMR_PRESCALER);
+
 	writel_relaxed(secs + 1, timer->base + BRCMSTB_WKTMR_ALARM);
 }