diff options
| author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2020-05-05 17:22:23 +0100 |
|---|---|---|
| committer | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2023-01-15 23:35:59 +0000 |
| commit | 2d764813202f7115f8de019d92f175742d8c8a25 (patch) | |
| tree | 58a1019e84256ce4f4f8a0606bf59f108fd1fed4 | |
| parent | b5943605f59a188cad2b560a6a35257865d80110 (diff) | |
doc: usb: ci-hdrc-usb2: Add pinctrl delay variable
After applying a new pin state it is depending on the platform sometimes
appropriate to delay before proceeding. A delay can allow for a peripheral
component, such as a USB Hub to latch and take action based on the
pin-state as presented by the SoC.
This patch introduces a new optional property pin-switch-delay-us. The
delay period will trigger a delay as specified in the DT if and only if
switching pinctrl state, otherwise this variable has no effect.
Cc: Loic Poulain <loic.poulain@linaro.org>
Cc: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index ba51fb1252b9..6b5b9b422ad5 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt @@ -90,6 +90,9 @@ Optional properties: case, the "idle" state needs to pull down the data and strobe pin and the "active" state needs to pull up the strobe pin. - pinctrl-n: alternate pin modes +- pin-switch-delay-us: the optional delay time in (us) to allow for the + application of a pinctrl-n state switch. + i.mx specific properties - fsl,usbmisc: phandler of non-core register device, with one |