linux-kernel - [RFC PATCH v2 2/6] dt-bindings: pwm: document the PWM no-flag

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Message-Id: <20200405192246.3741784-3-oleksandr.suvorov@toradex.com>
Date:   Sun,  5 Apr 2020 22:22:42 +0300
From:   Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
To:     devicetree@...r.kernel.org
Cc:     Paul Barker <pbarker@...sulko.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Igor Opaniuk <igor.opaniuk@...adex.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Oleksandr Suvorov <oleksandr.suvorov@...adex.com>,
        Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
Subject: [RFC PATCH v2 2/6] dt-bindings: pwm: document the PWM no-flag

Add the description of PWM_NOFLAGS flag property.

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
---

Changes in v2:
- add the example of PWM_NOFLAGS usage;
- Use PWM_NOFLAGS instead of PWM_POLARITY_NORMAL to avoid possible
  conflict with enum pwm_polarity in <linux/pwm.h>. Also, this name
  reflects the sense of the original value more precisely.

 Documentation/devicetree/bindings/pwm/pwm.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm.txt b/Documentation/devicetree/bindings/pwm/pwm.txt
index 084886bd721e..7f0bbda127c4 100644
--- a/Documentation/devicetree/bindings/pwm/pwm.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm.txt
@@ -45,7 +45,8 @@ period in nanoseconds.
 
 Optionally, the pwm-specifier can encode a number of flags (defined in
 <dt-bindings/pwm/pwm.h>) in a third cell:
-- PWM_POLARITY_INVERTED: invert the PWM signal polarity
+- PWM_NOFLAGS: no modification flags.
+- PWM_POLARITY_INVERTED: invert the PWM signal polarity.
 
 Example with optional PWM specifier for inverse polarity
 
@@ -54,6 +55,14 @@ Example with optional PWM specifier for inverse polarity
 		pwm-names = "backlight";
 	};
 
+	vibrator {
+		[...]
+		pwms = <&pwm1 0 10000000 PWM_POLARITY_INVERTED>,
+			   <&pwm2 0 10000000 PWM_NOFLAGS>;
+		pwm-names = "enable", "direction";
+		[...]
+	};
+
 2) PWM controller nodes
 -----------------------
 
-- 
2.24.1