Re: [PATCH 2/4] doc: usb: ci-hdrc-usb2: add property over-current-polarity
From: Joshua Clayton <hidden>
Date: 2016-07-18 15:24:50
Also in:
linux-arm-kernel
Greetings, On 07/18/2016 04:15 AM, Li Jun wrote:
quoted hunk
Adding over-current-polarity to indicate the over current flag is low active or high active. Signed-off-by: Li Jun <redacted> --- Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 2 ++ 1 file changed, 2 insertions(+)diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index 341dc67..c5d35f4 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt@@ -81,6 +81,8 @@ i.mx specific properties - fsl,usbmisc: phandler of non-core register device, with one argument that indicate usb controller index - disable-over-current: disable over current detect +- over-current-polarity: 0 if the over current signal polarity is low active, + 1 if the over current signal polarity is high active. - external-vbus-divider: enables off-chip resistor divider for Vbus Example:
The gpio device bindings already have active low/ active high. Could that be used here? In the imx SPI subsystem, for instance, the developers used gpio rather than MUXED spi chipselect lines for exactly this kind of flexibility. If there is no magic happening in silicon (which would seem to be the case if we can handle inverting polarity in the driver), I would suggest going the gpiod route. Thanks, Joshua -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html