diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-01 16:33:53 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-01 16:33:53 -0800 |
| commit | 7b05d3b37437f8d50a75545a0fd56ee585c58821 (patch) | |
| tree | 6fcc08874c05fa3d8b274d2569c0fe620f790360 /Documentation/devicetree/bindings/usb | |
| parent | 71e41bbb43794e0fe4ce3b766d713e222ccfb5ea (diff) | |
| parent | d3d8425a21ed1b14bc896f827ee495e06bff2504 (diff) | |
Merge tag 'usb-ci-v4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next
Peter writes:
- Add platform interface to choose ttctrl.ttha
- Some tiny improvements
Diffstat (limited to 'Documentation/devicetree/bindings/usb')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index 781296bfbe4f..1084e2bcbe1c 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt @@ -2,7 +2,14 @@ Required properties: - compatible: should be one of: + "fsl,imx23-usb" "fsl,imx27-usb" + "fsl,imx28-usb" + "fsl,imx6q-usb" + "fsl,imx6sl-usb" + "fsl,imx6sx-usb" + "fsl,imx6ul-usb" + "fsl,imx7d-usb" "lsi,zevio-usb" "qcom,ci-hdrc" "chipidea,usb2" @@ -53,6 +60,22 @@ Optional properties: be specified. - phy-clkgate-delay-us: the delay time (us) between putting the PHY into low power mode and gating the PHY clock. +- non-zero-ttctrl-ttha: after setting this property, the value of register + ttctrl.ttha will be 0x7f; if not, the value will be 0x0, this is the default + value. It needs to be very carefully for setting this property, it is + recommended that consult with your IC engineer before setting this value. + On the most of chipidea platforms, the "usage_tt" flag at RTL is 0, so this + property only affects siTD. + If this property is not set, the max packet size is 1023 bytes, and if + the total of packet size for pervious transactions are more than 256 bytes, + it can't accept any transactions within this frame. The use case is single + transaction, but higher frame rate. + If this property is set, the max packet size is 188 bytes, it can handle + more transactions than above case, it can accept transactions until it + considers the left room size within frame is less than 188 bytes, software + needs to make sure it does not send more than 90% + maximum_periodic_data_per_frame. The use case is multiple transactions, but + less frame rate. i.mx specific properties - fsl,usbmisc: phandler of non-core register device, with one |