linux-kernel - [PATCH v3 08/10] pwm: add push-pull mode support

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Date:   Thu, 22 Feb 2018 14:01:19 +0200
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <thierry.reding@...il.com>, <shc_work@...l.ru>, <kgene@...nel.org>,
        <krzk@...nel.org>, <linux@...linux.org.uk>,
        <mturquette@...libre.com>, <sboyd@...eaurora.org>,
        <jani.nikula@...ux.intel.com>, <joonas.lahtinen@...ux.intel.com>,
        <rodrigo.vivi@...el.com>, <airlied@...ux.ie>, <kamil@...as.org>,
        <b.zolnierkie@...sung.com>, <jdelvare@...e.com>,
        <linux@...ck-us.net>, <dmitry.torokhov@...il.com>,
        <rpurdie@...ys.net>, <jacek.anaszewski@...il.com>, <pavel@....cz>,
        <mchehab@...nel.org>, <sean@...s.org>, <lee.jones@...aro.org>,
        <daniel.thompson@...aro.org>, <jingoohan1@...il.com>,
        <milo.kim@...com>, <robh+dt@...nel.org>, <mark.rutland@....com>,
        <corbet@....net>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...e-electrons.com>
CC:     <linux-pwm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <intel-gfx@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-hwmon@...r.kernel.org>,
        <linux-input@...r.kernel.org>, <linux-leds@...r.kernel.org>,
        <linux-media@...r.kernel.org>, <linux-fbdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v3 08/10] pwm: add push-pull mode support

Add push-pull mode support. In push-pull mode the channels' outputs have
same polarities and the edges are complementary delayed for one period.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 include/linux/pwm.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 0ba416ab2772..765d760ef82d 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -29,11 +29,14 @@ enum pwm_polarity {
  * PWM modes
  * @PWM_MODE_NORMAL_BIT: PWM has one output
  * @PWM_MODE_COMPLEMENTARY_BIT: PWM has 2 outputs with opposite polarities
+ * @PWM_MODE_PUSH_PULL_BIT: PWM has 2 outputs with same polarities and the edges
+ * are complementary delayed for one period
  * @PWM_MODE_CNT: PWM modes count
  */
 enum {
 	PWM_MODE_NORMAL_BIT,
 	PWM_MODE_COMPLEMENTARY_BIT,
+	PWM_MODE_PUSH_PULL_BIT,
 	PWM_MODE_CNT,
 };
 
@@ -481,7 +484,11 @@ static inline bool pwm_caps_valid(struct pwm_caps caps)
 
 static inline const char * const pwm_mode_desc(unsigned long mode)
 {
-	static const char * const modes[] = { "normal", "complementary"	};
+	static const char * const modes[] = {
+		"normal",
+		"complementary",
+		"push-pull",
+	};
 
 	if (!pwm_mode_valid(mode))
 		return "invalid";
-- 
2.7.4