From: Peter Chen Date: Fri, 7 Aug 2015 07:08:02 +0000 (+0800) Subject: Doc: usb: ci-hdrc-usb2: add tx(rx)-burst-config-dword for binding doc X-Git-Tag: v4.3-rc1~156^2~34^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bd6e9d115df7fc6f11f3021c6fc05e3eaeb04a32;p=platform%2Fkernel%2Flinux-exynos.git 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 --- diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index d52a747..d71ef07 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>; };