From ed14d36498c8d15be098df4af9ca324f96e9de74 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Mon, 21 Feb 2022 17:28:16 +0100
Subject: [PATCH] pwm: rcar: Simplify multiplication/shift logic
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- Remove the superfluous cast; the multiplication will yield a 64-bit
result due to the "100ULL" anyway,
- "a * (1 << b)" == "a << b".
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
drivers/pwm/pwm-rcar.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c
index b437192380e23..55f46d09602b1 100644
--- a/drivers/pwm/pwm-rcar.c
+++ b/drivers/pwm/pwm-rcar.c
@@ -110,7 +110,7 @@ static int rcar_pwm_set_counter(struct rcar_pwm_chip *rp, int div, int duty_ns,
unsigned long clk_rate = clk_get_rate(rp->clk);
u32 cyc, ph;
- one_cycle = (unsigned long long)NSEC_PER_SEC * 100ULL * (1 << div);
+ one_cycle = NSEC_PER_SEC * 100ULL << div;
do_div(one_cycle, clk_rate);
tmp = period_ns * 100ULL;