linux-kernel - [tip: timers/clocksource] clocksource/drivers/vf-pit: Encapsulate the macros

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Message-ID: <175883600826.709179.796615245730237115.tip-bot2@tip-bot2>
Date: Thu, 25 Sep 2025 21:33:28 -0000
From: "tip-bot2 for Daniel Lezcano" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: timers/clocksource] clocksource/drivers/vf-pit: Encapsulate the macros

The following commit has been merged into the timers/clocksource branch of tip:

Commit-ID:     1ba63930e72356315e1a664952f52ee340edbbd3
Gitweb:        https://git.kernel.org/tip/1ba63930e72356315e1a664952f52ee340edbbd3
Author:        Daniel Lezcano <daniel.lezcano@...aro.org>
AuthorDate:    Mon, 04 Aug 2025 17:23:28 +02:00
Committer:     Daniel Lezcano <daniel.lezcano@...aro.org>
CommitterDate: Tue, 23 Sep 2025 12:29:22 +02:00

clocksource/drivers/vf-pit: Encapsulate the macros

Pass the base address to the macro, so we can use the macro with
multiple instances of the timer because we deal with different base
address. At the same time, change writes to the register to the
existing corresponding functions.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/20250804152344.1109310-11-daniel.lezcano@linaro.org
---
 drivers/clocksource/timer-vf-pit.c | 34 +++++++++++++++--------------
 1 file changed, 18 insertions(+), 16 deletions(-)

diff --git a/drivers/clocksource/timer-vf-pit.c b/drivers/clocksource/timer-vf-pit.c
index 6a40438..c81c68b 100644
--- a/drivers/clocksource/timer-vf-pit.c
+++ b/drivers/clocksource/timer-vf-pit.c
@@ -16,18 +16,20 @@
 #define PITMCR		0x00
 #define PIT0_OFFSET	0x100
 #define PIT_CH(n)       (PIT0_OFFSET + 0x10 * (n))
-#define PITLDVAL	0x00
+
 #define PITCVAL		0x04
-#define PITTCTRL	0x08
-#define PITTFLG		0x0c
 
 #define PITMCR_MDIS	BIT(1)
 
-#define PITTCTRL_TEN	BIT(0)
-#define PITTCTRL_TIE	BIT(1)
-#define PITCTRL_CHN	BIT(2)
+#define PITLDVAL(__base)	(__base)
+#define PITTCTRL(__base)	((__base) + 0x08)
+
+#define PITTCTRL_TEN			BIT(0)
+#define PITTCTRL_TIE			BIT(1)
+
+#define PITTFLG(__base)	((__base) + 0x0c)
 
-#define PITTFLG_TIF	0x1
+#define PITTFLG_TIF			BIT(0)
 
 struct pit_timer {
 	void __iomem *clksrc_base;
@@ -51,17 +53,17 @@ static inline struct pit_timer *cs_to_pit(struct clocksource *cs)
 
 static inline void pit_timer_enable(struct pit_timer *pit)
 {
-	writel(PITTCTRL_TEN | PITTCTRL_TIE, pit->clkevt_base + PITTCTRL);
+	writel(PITTCTRL_TEN | PITTCTRL_TIE, PITTCTRL(pit->clkevt_base));
 }
 
 static inline void pit_timer_disable(struct pit_timer *pit)
 {
-	writel(0, pit->clkevt_base + PITTCTRL);
+	writel(0, PITTCTRL(pit->clkevt_base));
 }
 
 static inline void pit_irq_acknowledge(struct pit_timer *pit)
 {
-	writel(PITTFLG_TIF, pit->clkevt_base + PITTFLG);
+	writel(PITTFLG_TIF, PITTFLG(pit->clkevt_base));
 }
 
 static u64 notrace pit_read_sched_clock(void)
@@ -92,9 +94,9 @@ static int __init pit_clocksource_init(struct pit_timer *pit, void __iomem *base
 	pit->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
 
 	/* set the max load value and start the clock source counter */
-	writel(0, pit->clksrc_base + PITTCTRL);
-	writel(~0, pit->clksrc_base + PITLDVAL);
-	writel(PITTCTRL_TEN, pit->clksrc_base + PITTCTRL);
+	pit_timer_disable(pit);
+	writel(~0, PITLDVAL(pit->clksrc_base));
+	writel(PITTCTRL_TEN, PITTCTRL(pit->clksrc_base));
 
 	clksrc_base = pit->clksrc_base;
 
@@ -115,7 +117,7 @@ static int pit_set_next_event(unsigned long delta, struct clock_event_device *ce
 	 * hardware requirement.
 	 */
 	pit_timer_disable(pit);
-	writel(delta - 1, pit->clkevt_base + PITLDVAL);
+	writel(delta - 1, PITLDVAL(pit->clkevt_base));
 	pit_timer_enable(pit);
 
 	return 0;
@@ -171,9 +173,9 @@ static int __init pit_clockevent_init(struct pit_timer *pit, void __iomem *base,
 	pit->clkevt_base = base + PIT_CH(3);
 	pit->cycle_per_jiffy = rate / (HZ);
 
-	writel(0, pit->clkevt_base + PITTCTRL);
+	pit_timer_disable(pit);
 
-	writel(PITTFLG_TIF, pit->clkevt_base + PITTFLG);
+	pit_irq_acknowledge(pit);
 
 	BUG_ON(request_irq(irq, pit_timer_interrupt, IRQF_TIMER | IRQF_IRQPOLL,
 			   "VF pit timer", &pit->ced));