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imx: usb: ehci-mx6: document board specific functions

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Document target board specific functions

board_ehci_hcd_init - override usb phy mode
board_ehci_hcd_init - set usb vbus voltage
board_ehci_power - enables/disables usb vbus voltage

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
This commit is contained in:
Adrian Alonso 2015-08-06 15:43:16 -05:00 committed by Marek Vasut
parent e38ff30a55
commit 74f0610eb4
1 changed files with 31 additions and 0 deletions
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31
drivers/usb/host/ehci-mx6.c
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@ -195,16 +195,47 @@ int usb_phy_mode(int port)
return USB_INIT_HOST;
}
/**
* board_ehci_hcd_init - override usb phy mode
* @port: usb host/otg port
*
* Target board specific, override usb_phy_mode.
* When usb-otg is used as usb host port, iomux pad usb_otg_id can be
* left disconnected in this case usb_phy_mode will not be able to identify
* the phy mode that usb port is used.
* Machine file overrides board_usb_phy_mode.
*
* Return: USB_INIT_DEVICE or USB_INIT_HOST
*/
int __weak board_usb_phy_mode(int port)
{
return usb_phy_mode(port);
}
/**
* board_ehci_hcd_init - set usb vbus voltage
* @port: usb otg port
*
* Target board specific, setup iomux pad to setup supply vbus voltage
* for usb otg port. Machine board file overrides board_ehci_hcd_init
*
* Return: 0 Success
*/
int __weak board_ehci_hcd_init(int port)
{
return 0;
}
/**
* board_ehci_power - enables/disables usb vbus voltage
* @port: usb otg port
* @on: on/off vbus voltage
*
* Enables/disables supply vbus voltage for usb otg port.
* Machine board file overrides board_ehci_power
*
* Return: 0 Success
*/
int __weak board_ehci_power(int port, int on)
{
return 0;