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doc: dt-binding: ci-hdrc-usb2: improve property description

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Improve the description of properties "tx-burst-size-dword"
and "rx-burst-size-dword".

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shanw Guo <shawnguo@kernel.org>
This commit is contained in:
Peter Chen 2015-10-13 17:18:22 +08:00
parent 5cb377c52f
commit c532e74c4b
1 changed files with 6 additions and 2 deletions
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8
Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
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@ -41,11 +41,15 @@ Optional properties:
- 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.
bus, the value of this property will only take effect if property
"ahb-burst-config" is set to 0, if this property is missing the reset
default of the hardware implementation will be used.
- 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.
the value of this property will only take effect if property
"ahb-burst-config" is set to 0, if this property is missing the reset
default of the hardware implementation will be used.
- extcon: phandles to external connector devices. First phandle should point to
external connector, which provide "USB" cable events, the second should point
to external connector device, which provide "USB-HOST" cable events. If one