linux-kernel - [PATCH 1/2] extcon: usb-gpio: Add level trigger support

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Message-Id: <0db99bd509c94ea8a80f633022d15235a99391a9.1489995966.git.baolin.wang@linaro.org>
Date:   Mon, 20 Mar 2017 15:59:41 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     myungjoo.ham@...sung.com, cw00.choi@...sung.com,
        robh+dt@...nel.org, mark.rutland@....com
Cc:     broonie@...nel.org, baolin.wang@...aro.org,
        linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH 1/2] extcon: usb-gpio: Add level trigger support

Now extcon-usb-gpio only supports for GPIO egdge trigger, but VBUS/ID
gpios' detection can be triggered by the level trigger on some platforms.
Thus intoduce one property 'extcon-gpio,level-trigger' to identify this
situation.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 .../devicetree/bindings/extcon/extcon-usb-gpio.txt |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt
index dfc14f7..191504b 100644
--- a/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt
+++ b/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt
@@ -9,6 +9,9 @@ Required properties:
 Either one of id-gpio or vbus-gpio must be present. Both can be present as well.
 - id-gpio: gpio for USB ID pin. See gpio binding.
 - vbus-gpio: gpio for USB VBUS pin.
+- extcon-gpio,level-trigger: Boolean, set this gpio's interrupt flag to
+level trigger. If not specified defaults to false, gpio's interrupt flag
+defaults to edge trigger.
 
 Example: Examples of extcon-usb-gpio node in dra7-evm.dts as listed below:
 	extcon_usb1 {
-- 
1.7.9.5