linux-kernel - [PATCH v4 6/10] dt-bindings: pwm: update bindings for MT7628 SoC

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Message-ID: <1566265225-27452-7-git-send-email-sam.shih@mediatek.com>
Date:   Tue, 20 Aug 2019 09:40:21 +0800
From:   Sam Shih <sam.shih@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Thierry Reding <thierry.reding@...il.com>
CC:     Ryder Lee <ryder.lee@...iatek.com>,
        John Crispin <john@...ozen.org>, <linux-pwm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        sam shih <sam.shih@...iatek.com>
Subject: [PATCH v4 6/10] dt-bindings: pwm: update bindings for MT7628 SoC

From: sam shih <sam.shih@...iatek.com>

This updates bindings for MT7628 pwm controller.

Signed-off-by: Sam Shih <sam.shih@...iatek.com>
---
 Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
index ea95b490a913..bd644ba85762 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
@@ -20,6 +20,10 @@ Required properties:
  - pinctrl-0: One property must exist for each entry in pinctrl-names.
    See pinctrl/pinctrl-bindings.txt for details of the property values.
  - num-pwms: the number of PWM channels.
+
+ Optional properties:
+ - clock-frequency: fix clock frequency, this is only used in MT7628 SoC
+                    for period calculation. This SoC has no complex clock tree.
 
 Example:
 	pwm0: pwm@...06000 {
-- 
2.17.1