linux-kernel - [PATCH v6 4/6] pwm: add push-pull mode support

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Message-ID: <1545055368-23338-5-git-send-email-claudiu.beznea@microchip.com>
Date:   Mon, 17 Dec 2018 14:03:26 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <thierry.reding@...il.com>, <corbet@....net>,
        <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <Ludovic.Desroches@...rochip.com>, <robh@...nel.org>
CC:     <linux-pwm@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <Claudiu.Beznea@...rochip.com>
Subject: [PATCH v6 4/6] pwm: add push-pull mode support

From: Claudiu Beznea <claudiu.beznea@...rochip.com>

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>
---
 drivers/pwm/core.c  | 3 +++
 include/linux/pwm.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index eb444ee8d486..f182d1eb564e 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -328,6 +328,9 @@ const char *pwm_get_mode_name(unsigned long modebit)
 	if (modebit == PWM_MODE_BIT(COMPLEMENTARY))
 		return "complementary";
 
+	if (modebit == PWM_MODE_BIT(PUSH_PULL))
+		return "push-pull";
+
 	return "normal";
 }
 
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index abe189d891af..cce29733d44e 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -32,11 +32,14 @@ enum pwm_polarity {
  * PWM modes capabilities
  * @PWM_MODE_NORMAL: PWM has one output
  * @PWM_MODE_COMPLEMENTARY: PWM has 2 outputs with opposite polarities
+ * @PWM_MODE_PUSH_PULL: 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 {
 	PWM_MODE_NORMAL,
 	PWM_MODE_COMPLEMENTARY,
+	PWM_MODE_PUSH_PULL,
 	PWM_MODE_CNT,
 };
 
-- 
2.7.4