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Message-Id: <20190626144651.16742-2-daniel.lezcano@linaro.org>
Date: Wed, 26 Jun 2019 16:46:28 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org,
Linus Walleij <linus.walleij@...aro.org>,
Linus Walleij <linusw@...nel.org>,
Imre Kaloz <kaloz@...nwrt.org>,
Krzysztof Halasa <khalasa@...p.pl>,
linux-arm-kernel@...ts.infradead.org (moderated list:ARM/INTEL IXP4XX
ARM ARCHITECTURE)
Subject: [PATCH 02/25] clocksource/drivers/ixp4xx: Implement delay timer
From: Linus Walleij <linus.walleij@...aro.org>
This adds delay timer functionality to the IXP4xx
timer driver.
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
drivers/clocksource/timer-ixp4xx.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/clocksource/timer-ixp4xx.c b/drivers/clocksource/timer-ixp4xx.c
index 5c2190b654cd..9396745e1c17 100644
--- a/drivers/clocksource/timer-ixp4xx.c
+++ b/drivers/clocksource/timer-ixp4xx.c
@@ -75,14 +75,19 @@ to_ixp4xx_timer(struct clock_event_device *evt)
return container_of(evt, struct ixp4xx_timer, clkevt);
}
-static u64 notrace ixp4xx_read_sched_clock(void)
+static unsigned long ixp4xx_read_timer(void)
{
return __raw_readl(local_ixp4xx_timer->base + IXP4XX_OSTS_OFFSET);
}
+static u64 notrace ixp4xx_read_sched_clock(void)
+{
+ return ixp4xx_read_timer();
+}
+
static u64 ixp4xx_clocksource_read(struct clocksource *c)
{
- return __raw_readl(local_ixp4xx_timer->base + IXP4XX_OSTS_OFFSET);
+ return ixp4xx_read_timer();
}
static irqreturn_t ixp4xx_timer_interrupt(int irq, void *dev_id)
@@ -224,6 +229,13 @@ static __init int ixp4xx_timer_register(void __iomem *base,
sched_clock_register(ixp4xx_read_sched_clock, 32, timer_freq);
+#ifdef CONFIG_ARM
+ /* Also use this timer for delays */
+ tmr->delay_timer.read_current_timer = ixp4xx_read_timer;
+ tmr->delay_timer.freq = timer_freq;
+ register_current_timer_delay(&tmr->delay_timer);
+#endif
+
return 0;
}
--
2.17.1
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