pwm: rcar: Simplify multiplication/shift logic

- 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>

diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c
index b437192..55f46d0 100644 (file)
--- 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;