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Message-ID: <20250804080328.2609287-3-markus.stockhausen@gmx.de>
Date: Mon, 4 Aug 2025 04:03:26 -0400
From: Markus Stockhausen <markus.stockhausen@....de>
To: markus.stockhausen@....de,
daniel.lezcano@...aro.org,
tglx@...utronix.de,
linux-kernel@...r.kernel.org,
howels@...thatwemight.be,
bjorn@...k.no
Subject: [PATCH 2/4] clocksource/drivers/timer-rtl-otto: drop set_counter function
The current counter value is a read only register. It will be
reset when writing a new target timer value with rttm_set_period().
rttm_set_counter() is essentially a noop. Drop it.
While this makes rttm_start_timer() and rttm_enable_timer() the
same functions keep both to make the established abstraction layers
for register and control functions active.
Downstream has already tested and confirmed a patch. See
https://github.com/openwrt/openwrt/pull/19468
https://forum.openwrt.org/t/support-for-rtl838x-based-managed-switches/57875/3788
Tested-by: Stephen Howell <howels@...thatwemight.be>
Tested-by: Bjørn Mork <bjorn@...k.no>
Signed-off-by: Markus Stockhausen <markus.stockhausen@....de>
---
drivers/clocksource/timer-rtl-otto.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/clocksource/timer-rtl-otto.c b/drivers/clocksource/timer-rtl-otto.c
index 8be45a11fb8b..48ba1164f3fb 100644
--- a/drivers/clocksource/timer-rtl-otto.c
+++ b/drivers/clocksource/timer-rtl-otto.c
@@ -56,11 +56,6 @@ struct rttm_cs {
};
/* Simple internal register functions */
-static inline void rttm_set_counter(void __iomem *base, unsigned int counter)
-{
- iowrite32(counter, base + RTTM_CNT);
-}
-
static inline unsigned int rttm_get_counter(void __iomem *base)
{
return ioread32(base + RTTM_CNT);
@@ -137,7 +132,6 @@ static void rttm_stop_timer(void __iomem *base)
static void rttm_start_timer(struct timer_of *to, u32 mode)
{
- rttm_set_counter(to->of_base.base, 0);
rttm_enable_timer(to->of_base.base, mode, to->of_clk.rate / RTTM_TICKS_PER_SEC);
}
--
2.47.0
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