linux-kernel - [PATCH v4 7/9] pwm: add push-pull mode support

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Message-ID: <1522321835-6460-8-git-send-email-claudiu.beznea@microchip.com>
Date:   Thu, 29 Mar 2018 14:10:33 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <thierry.reding@...il.com>, <shc_work@...l.ru>,
        <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>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v4 7/9] 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>
---
 drivers/pwm/core.c  | 1 +
 include/linux/pwm.h | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 59a9df9120de..5fde2e685ca7 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -348,6 +348,7 @@ const char *pwm_mode_desc(struct pwm_device *pwm, unsigned long mode)
 		"invalid",
 		"normal",
 		"complementary",
+		"push-pull",
 	};
 
 	if (!pwm_mode_valid(pwm, mode))
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index c4aa997489f3..9a99d5659331 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -29,11 +29,14 @@ enum pwm_polarity {
  * PWM modes capabilities
  * @PWMC_MODE_NORMAL_BIT: PWM has one output
  * @PWMC_MODE_COMPLEMENTARY_BIT: PWM has 2 outputs with opposite polarities
+ * @PWMC_MODE_PUSH_PULL_BIT: PWM has 2 outputs with same polarities and the
+ * edges are complementary delayed for one period
  * @PWMC_MODE_CNT: PWM modes count
  */
 enum {
 	PWMC_MODE_NORMAL_BIT,
 	PWMC_MODE_COMPLEMENTARY_BIT,
+	PWMC_MODE_PUSH_PULL_BIT,
 	PWMC_MODE_CNT,
 };
 
-- 
2.7.4