lkml.org 
[lkml]   [2021]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] clocksource/drivers/timer-mediatek: optimize systimer irq clear flow on Mediatek Socs
Date
1)ensure systimer is enabled before clear and disable interrupt, which only
for systimer in Mediatek Socs.

2)clear any pending timer-irq when shutdown to keep suspend flow clean,
when use systimer as tick-broadcast timer

Change-Id: Ia3eda83324af2fdaf5cbb3569a9bf020a11f8009
Signed-off-by: Fengquan Chen <fengquan.chen@mediatek.com>
---
drivers/clocksource/timer-mediatek.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/clocksource/timer-mediatek.c b/drivers/clocksource/timer-mediatek.c
index 9318edc..9f1f095dc 100644
--- a/drivers/clocksource/timer-mediatek.c
+++ b/drivers/clocksource/timer-mediatek.c
@@ -75,6 +75,7 @@
static void mtk_syst_ack_irq(struct timer_of *to)
{
/* Clear and disable interrupt */
+ writel(SYST_CON_EN, SYST_CON_REG(to));
writel(SYST_CON_IRQ_CLR | SYST_CON_EN, SYST_CON_REG(to));
}

@@ -111,6 +112,9 @@ static int mtk_syst_clkevt_next_event(unsigned long ticks,

static int mtk_syst_clkevt_shutdown(struct clock_event_device *clkevt)
{
+ /* Clear any irq */
+ mtk_syst_ack_irq(to_timer_of(clkevt));
+
/* Disable timer */
writel(0, SYST_CON_REG(to_timer_of(clkevt)));

--
1.8.1.1.dirty
\
 
 \ /
  Last update: 2021-03-02 16:40    [W:0.133 / U:1.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site