diff options
| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2012-12-03 20:07:05 +0100 |
|---|---|---|
| committer |   Felipe Balbi <balbi@ti.com> | 2013-01-10 12:38:52 +0200 |
| commit | 8f900a9a6e2691441ad763952d640ac44220e5dc (patch) | |
| tree | 5f00b9cba299d1dfa035bf3dc13cb1029e39381a /include/linux/usb/composite.h | |
| parent | usb: gadget: mass_storage: remove >= 0 check for unsigned type (diff) | |
| download | linux-dev-8f900a9a6e2691441ad763952d640ac44220e5dc.tar.xz linux-dev-8f900a9a6e2691441ad763952d640ac44220e5dc.zip | |
usb: gadget: consider link speed for bMaxPower
The USB 2.0 specification says that bMaxPower is the maximum power
consumption expressed in 2 mA units and the USB 3.0 specification says
that it is expressed in 8 mA units.
This patch renames bMaxPower to MaxPower and the various /2 and *2 are
removed. Before reporting the config descriptor, the proper value is
computer based on the speed, all in-tree users are updated. MaxPower is
also increased to u16 so we can store the nokia gadget value which is
larger than the max value allowed for u8.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'include/linux/usb/composite.h')
| -rw-r--r-- | include/linux/usb/composite.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index b09c37e04a91..dc512c9432d7 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -184,7 +184,8 @@ int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f, * @bConfigurationValue: Copied into configuration descriptor. * @iConfiguration: Copied into configuration descriptor. * @bmAttributes: Copied into configuration descriptor. - * @bMaxPower: Copied into configuration descriptor. + * @MaxPower: Power consumtion in mA. Used to compute bMaxPower in the + * configuration descriptor after considering the bus speed. * @cdev: assigned by @usb_add_config() before calling @bind(); this is * the device associated with this configuration. * @@ -230,7 +231,7 @@ struct usb_configuration { u8 bConfigurationValue; u8 iConfiguration; u8 bmAttributes; - u8 bMaxPower; + u16 MaxPower; struct usb_composite_dev *cdev; |