Commit d64dc611 authored Jul 10, 2020 by Uwe Kleine-König Committed by Greg Kroah-Hartman Jul 16, 2020

pwm: jz4740: Fix build failure

When commit 9017dc4fbd59 ("pwm: jz4740: Enhance precision in calculation
of duty cycle") from v5.8-rc1 was backported to v5.4.x its dependency on
commit ce1f9cece057 ("pwm: jz4740: Use clocks from TCU driver") was not
noticed which made the pwm-jz4740 driver fail to build.

As ce1f9cece057 depends on still more rework, just backport a small part
of this commit to make the driver build again. (There is no dependency
on the functionality introduced in ce1f9cece057, just the rate variable
is needed.)

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reported-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent d13a78d1

drivers/pwm/pwm-jz4740.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -92,11 +92,12 @@ static int jz4740_pwm_apply(struct pwm_chip chip, struct pwm_device pwm,
		{
		struct jz4740_pwm_chip *jz4740 = to_jz4740(pwm->chip);
		unsigned long long tmp;
		unsigned long period, duty;
		unsigned long rate, period, duty;
		unsigned int prescaler = 0;
		uint16_t ctrl;

		tmp = (unsigned long long)clk_get_rate(jz4740->clk) * state->period;
		rate = clk_get_rate(jz4740->clk);
		tmp = rate * state->period;
		do_div(tmp, 1000000000);
		period = tmp;