[PATCH 4.9 17/80] usb: Make sure usb/phy/of gets built-in

From: Greg Kroah-Hartman
Date: Thu May 18 2017 - 07:30:57 EST

4.9-stable review patch. If anyone has any objections, please let me know.


From: Alexey Brodkin <Alexey.Brodkin@xxxxxxxxxxxx>

commit 3d6159640da9c9175d1ca42f151fc1a14caded59 upstream.

DWC3 driver uses of_usb_get_phy_mode() which is
implemented in drivers/usb/phy/of.c and in bare minimal
configuration it might not be pulled in kernel binary.

In case of ARC or ARM this could be easily reproduced with
"allnodefconfig" +CONFIG_USB=m +CONFIG_USB_DWC3=m.

On building all ends-up with:
Kernel: arch/arm/boot/Image is ready
Kernel: arch/arm/boot/zImage is ready
Building modules, stage 2.
MODPOST 5 modules
ERROR: "of_usb_get_phy_mode" [drivers/usb/dwc3/dwc3.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

Signed-off-by: Alexey Brodkin <abrodkin@xxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxxxxxx>
Cc: Felix Fietkau <nbd@xxxxxxxx>
Cc: Jeremy Kerr <jk@xxxxxxxxxx>
Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/Makefile | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_USB_PHY) += usb/
obj-$(CONFIG_USB) += usb/
obj-$(CONFIG_PCI) += usb/
obj-$(CONFIG_USB_GADGET) += usb/
+obj-$(CONFIG_OF) += usb/
obj-$(CONFIG_SERIO) += input/serio/
obj-$(CONFIG_GAMEPORT) += input/gameport/
obj-$(CONFIG_INPUT) += input/