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usb: common: add API to get if the platform supports TPL 

The TPL (Targeted Peripheral List) is used for targeted hosts
(non-PC hosts), and it can be used at USB OTG & EH certification
and some specific products which need white list.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2014-08-19 09:51:55 +08:00 committed by Greg Kroah-Hartman
parent 9bd0181c74
commit 05f8b35a62
2 changed files with 20 additions and 0 deletions
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15
drivers/usb/common/usb-common.c
View File

@ -139,6 +139,21 @@ enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np)
}
EXPORT_SYMBOL_GPL(of_usb_get_maximum_speed);
/**
* of_usb_host_tpl_support - to get if Targeted Peripheral List is supported
* for given targeted hosts (non-PC hosts)
* @np: Pointer to the given device_node
*
* The function gets if the targeted hosts support TPL or not
*/
bool of_usb_host_tpl_support(struct device_node *np)
{
if (of_find_property(np, "tpl-support", NULL))
return true;
return false;
}
EXPORT_SYMBOL_GPL(of_usb_host_tpl_support);
#endif
MODULE_LICENSE("GPL");

5
include/linux/usb/of.h
View File

@ -14,6 +14,7 @@
#if IS_ENABLED(CONFIG_OF)
enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np);
enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np);
bool of_usb_host_tpl_support(struct device_node *np);
#else
static inline enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
{
@ -25,6 +26,10 @@ of_usb_get_maximum_speed(struct device_node *np)
{
return USB_SPEED_UNKNOWN;
}
static inline bool of_usb_host_tpl_support(struct device_node *np)
{
return false;
}
#endif
#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT)