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usb: gadget: consider link speed for bMaxPower

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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>
This commit is contained in:
Sebastian Andrzej Siewior
2012-12-03 20:07:05 +01:00
committed by Felipe Balbi
parent 98f3a1b907
commit 8f900a9a6e
5 changed files with 30 additions and 10 deletions
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5
include/linux/usb/composite.h
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@@ -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;