usb: musb: fix dependency on transceiver driver
This patch let glue driver return -EPROBE_DEFER if the transceiver
is not readly, so we can support defer probe on musb to fix the
below error on 3.7-rc5 if transceiver drivers are built as module:
[ 19.052490] unable to find transceiver of type USB2 PHY
[ 19.072052] HS USB OTG: no transceiver configured
[ 19.076995] musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -19
[ 19.089355] musb-hdrc: probe of musb-hdrc.0.auto rejects match -19
[ 19.096771] driver: 'musb-omap2430': driver_bound: bound to device 'musb-omap2430'
[ 19.105194] bus: 'platform': really_probe: bound device musb-omap2430 to driver musb-omap2430
[ 19.174407] bus: 'platform': add driver twl4030_usb
[ 19.179656] bus: 'platform': driver_probe_device: matched device twl4030_usb with driver twl4030_usb
[ 19.202270] bus: 'platform': really_probe: probing driver twl4030_usb with device twl4030_usb
[ 19.214172] twl4030_usb twl4030_usb: HW_CONDITIONS 0xc0/192; link 3
[ 19.239624] musb-omap2430 musb-omap2430: musb core is not yet ready
[ 19.246765] twl4030_usb twl4030_usb: Initialized TWL4030 USB module
[ 19.254516] driver: 'twl4030_usb': driver_bound: bound to device 'twl4030_usb'
[ 19.263580] bus: 'platform': really_probe: bound device twl4030_usb to driver twl4030_usb
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: <stable@vger.kernel.org> v3.8
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index 97996af..7c71769d 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -410,6 +410,7 @@
{
void __iomem *reg_base = musb->ctrl_base;
u32 rev;
+ int ret = -ENODEV;
musb->mregs += DA8XX_MENTOR_CORE_OFFSET;
@@ -420,8 +421,10 @@
usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (IS_ERR_OR_NULL(musb->xceiv))
+ if (IS_ERR_OR_NULL(musb->xceiv)) {
+ ret = -EPROBE_DEFER;
goto fail;
+ }
setup_timer(&otg_workaround, otg_timer, (unsigned long)musb);
@@ -441,7 +444,7 @@
musb->isr = da8xx_musb_interrupt;
return 0;
fail:
- return -ENODEV;
+ return ret;
}
static int da8xx_musb_exit(struct musb *musb)