diff options
| author | Peter Chen <peter.chen@freescale.com> | 2016-02-19 17:26:15 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-05 12:05:01 -0800 |
| commit | 69bec725985324e79b1c47ea287815ac4ddb0521 (patch) | |
| tree | f6fbc0e6440facdafada6f45af9ec5754190d730 /include/linux/usb/of.h | |
| parent | d883f52e1f6d2eca8378e3795f333c1396943873 (diff) | |
USB: core: let USB device know device node
Although most of USB devices are hot-plug's, there are still some devices
are hard wired on the board, eg, for HSIC and SSIC interface USB devices.
If these kinds of USB devices are multiple functions, and they can supply
other interfaces like i2c, gpios for other devices, we may need to
describe these at device tree.
In this commit, it uses "reg" in dts as physical port number to match
the phyiscal port number decided by USB core, if they are the same,
then the device node is for the device we are creating for USB core.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb/of.h')
| -rw-r--r-- | include/linux/usb/of.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h index 974bce93aa28..de3237fce6b2 100644 --- a/include/linux/usb/of.h +++ b/include/linux/usb/of.h @@ -16,6 +16,8 @@ enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *phy_np); bool of_usb_host_tpl_support(struct device_node *np); int of_usb_update_otg_caps(struct device_node *np, struct usb_otg_caps *otg_caps); +struct device_node *usb_of_get_child_node(struct device_node *parent, + int portnum); #else static inline enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *phy_np) @@ -31,6 +33,11 @@ static inline int of_usb_update_otg_caps(struct device_node *np, { return 0; } +static inline struct device_node *usb_of_get_child_node + (struct device_node *parent, int portnum) +{ + return NULL; +} #endif #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT) |