From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Sat, 28 Jan 2017 15:10:40 +0000 (+0200)
Subject: pwm: lpss: Allow duty cycle to be 0
X-Git-Tag: v4.11-rc1~40^2^2~13
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=b5c050c719922901891bdd8580d224e2a0035db5;p=linux-block.git

pwm: lpss: Allow duty cycle to be 0

A duty cycle is represented by values [0..<period>] which reflects [0%..100%].
0% of the duty cycle means always off (logical "0") on output. Allow this in
the driver.

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 8642feeb8abd..ffa01ab907a6 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -107,8 +107,6 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm,
 
 	base_unit = DIV_ROUND_CLOSEST_ULL(freq, c);
 
-	if (duty_ns <= 0)
-		duty_ns = 1;
 	on_time_div = 255ULL * duty_ns;
 	do_div(on_time_div, period_ns);
 	on_time_div = 255ULL - on_time_div;