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| author | Peter Chen <peter.chen@freescale.com> | 2015-08-07 09:08:02 +0200 |
|---|---|---|
| committer | Peter Chen <peter.chen@freescale.com> | 2015-08-14 04:03:57 +0200 |
| commit | bd6e9d115df7fc6f11f3021c6fc05e3eaeb04a32 (patch) | |
| tree | f5e777afc5387dc7c4dd5aa6db922cf13e308e46 | |
| parent | usb: chipidea: usbmisc_imx: add non-burst setting for imx6 (diff) | |
| download | linux-bd6e9d115df7fc6f11f3021c6fc05e3eaeb04a32.tar.xz linux-bd6e9d115df7fc6f11f3021c6fc05e3eaeb04a32.zip | |
Doc: usb: ci-hdrc-usb2: add tx(rx)-burst-config-dword for binding doc
It is used to override the default setting for burst size, changing
burst size takes effect only when the SBUSCFG.AHBBRST = 0.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
| -rw-r--r-- | Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index d52a747fb859..d71ef07bca5d 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt @@ -37,6 +37,14 @@ Optional properties: property is used to change AHB burst configuration, check the chipidea spec for meaning of each value. If this property is not existed, it will use the reset value. +- tx-burst-size-dword: it is vendor dependent, the tx burst size in dword + (4 bytes), This register represents the maximum length of a the burst + in 32-bit words while moving data from system memory to the USB + bus, changing this value takes effect only the SBUSCFG.AHBBRST is 0. +- rx-burst-size-dword: it is vendor dependent, the rx burst size in dword + (4 bytes), This register represents the maximum length of a the burst + in 32-bit words while moving data from the USB bus to system memory, + changing this value takes effect only the SBUSCFG.AHBBRST is 0. Example: @@ -51,4 +59,6 @@ Example: gadget-itc-setting = <0x4>; /* 4 micro-frames */ /* Incremental burst of unspecified length */ ahb-burst-config = <0x0>; + tx-burst-size-dword = <0x10>; /* 64 bytes */ + rx-burst-size-dword = <0x10>; }; |