usb: ulpi: Define a *otg_ulpi_create no-op
authorFabio Estevam <fabio.estevam@freescale.com>
Wed, 20 Mar 2013 13:35:44 +0000 (10:35 -0300)
committerFelipe Balbi <balbi@ti.com>
Wed, 20 Mar 2013 15:30:40 +0000 (17:30 +0200)
Building a kernel for imx_v4_v5_defconfig with CONFIG_USB_ULPI disabled, results
in the following error:

arch/arm/mach-imx/built-in.o: In function 'pca100_init':
platform-mx2-emma.c:(.init.text+0x6788): undefined reference to 'otg_ulpi_create'
platform-mx2-emma.c:(.init.text+0x682c): undefined reference to 'mxc_ulpi_access_ops'

Fix this by providing a no-op definition of *otg_ulpi_create for the case when
CONFIG_USB_ULPI is not defined.

Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
include/linux/usb/ulpi.h

index 6f033a415ecb85caa0291a58940922b5d6304419..5c295c26ad37c8d743020ca4bab5996bc52f4df2 100644 (file)
 
 /*-------------------------------------------------------------------------*/
 
+#if IS_ENABLED(CONFIG_USB_ULPI)
 struct usb_phy *otg_ulpi_create(struct usb_phy_io_ops *ops,
                                        unsigned int flags);
+#else
+static inline struct usb_phy *otg_ulpi_create(struct usb_phy_io_ops *ops,
+                                             unsigned int flags)
+{
+       return NULL;
+}
+#endif
 
 #ifdef CONFIG_USB_ULPI_VIEWPORT
 /* access ops for controllers with a viewport register */