linux-kernel - [PATCH v3 3/6] clocksource/drivers/timer-microchip-pit64b: use 5MHz for clockevent

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Message-ID: <20220304133601.2404086-4-claudiu.beznea@microchip.com>
Date:   Fri, 4 Mar 2022 15:35:58 +0200
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <daniel.lezcano@...aro.org>, <tglx@...utronix.de>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v3 3/6] clocksource/drivers/timer-microchip-pit64b: use 5MHz for clockevent

Use 5MHz clock for clockevent timers. This increases timer's
resolution.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/clocksource/timer-microchip-pit64b.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/timer-microchip-pit64b.c b/drivers/clocksource/timer-microchip-pit64b.c
index 790d2c9b42a7..abce83d2f00b 100644
--- a/drivers/clocksource/timer-microchip-pit64b.c
+++ b/drivers/clocksource/timer-microchip-pit64b.c
@@ -42,8 +42,7 @@
 #define MCHP_PIT64B_LSBMASK		GENMASK_ULL(31, 0)
 #define MCHP_PIT64B_PRES_TO_MODE(p)	(MCHP_PIT64B_MR_PRES & ((p) << 8))
 #define MCHP_PIT64B_MODE_TO_PRES(m)	((MCHP_PIT64B_MR_PRES & (m)) >> 8)
-#define MCHP_PIT64B_DEF_CS_FREQ		5000000UL	/* 5 MHz */
-#define MCHP_PIT64B_DEF_CE_FREQ		32768		/* 32 KHz */
+#define MCHP_PIT64B_DEF_FREQ		5000000UL	/* 5 MHz */
 
 #define MCHP_PIT64B_NAME		"pit64b"
 
@@ -418,7 +417,6 @@ static int __init mchp_pit64b_init_clkevt(struct mchp_pit64b_timer *timer,
 static int __init mchp_pit64b_dt_init_timer(struct device_node *node,
 					    bool clkevt)
 {
-	u32 freq = clkevt ? MCHP_PIT64B_DEF_CE_FREQ : MCHP_PIT64B_DEF_CS_FREQ;
 	struct mchp_pit64b_timer timer;
 	unsigned long clk_rate;
 	u32 irq = 0;
@@ -446,7 +444,7 @@ static int __init mchp_pit64b_dt_init_timer(struct device_node *node,
 	}
 
 	/* Initialize mode (prescaler + SGCK bit). To be used at runtime. */
-	ret = mchp_pit64b_init_mode(&timer, freq);
+	ret = mchp_pit64b_init_mode(&timer, MCHP_PIT64B_DEF_FREQ);
 	if (ret)
 		goto irq_unmap;
 
-- 
2.32.0