diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2015-06-17 21:33:54 +0200 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-07-21 17:39:37 -0600 |
| commit | 15837236386191f2a26706b5ee56cdb4ab28e6d5 (patch) | |
| tree | dd84bb180cbecfe09bbab7bd1950ba7d87485a1b /drivers/usb/musb-new/musb_core.c | |
| parent | fd1bd21bf07d0770bff7b477d501b706dac9987d (diff) | |
musb: Allow musb_platform_enable to return an error code
Allow musb_platform_enable to return an error code and propagate it up to
usb_lowlevel_init().
This allows moving the checks for an external vbus being present to be
moved from platform_init to platform_enable, so that the user can unplug a
charger, plug in a host adapter with a usb-device, do a "usb reset" and
have things working.
This also allows adding a check for the id-pin to platform_enable, so that
it can short circuit the 1s delay in usb_lowlevel_init() when no host cable
is plugged in and thus waiting for a device to show up is useless.
Note that all the changes to code shared with the kernel are wrapped in
the kernel.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/usb/musb-new/musb_core.c')
| -rw-r--r-- | drivers/usb/musb-new/musb_core.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/musb-new/musb_core.c b/drivers/usb/musb-new/musb_core.c index 242cc30b1c..f530af4fb7 100644 --- a/drivers/usb/musb-new/musb_core.c +++ b/drivers/usb/musb-new/musb_core.c @@ -926,10 +926,17 @@ b_host: /* * Program the HDRC to start (enable interrupts, dma, etc.). */ +#ifndef __UBOOT__ void musb_start(struct musb *musb) +#else +int musb_start(struct musb *musb) +#endif { void __iomem *regs = musb->mregs; u8 devctl = musb_readb(regs, MUSB_DEVCTL); +#ifdef __UBOOT__ + int ret; +#endif dev_dbg(musb->controller, "<== devctl %02x\n", devctl); @@ -972,8 +979,21 @@ void musb_start(struct musb *musb) if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) musb->is_active = 1; } + +#ifndef __UBOOT__ musb_platform_enable(musb); +#else + ret = musb_platform_enable(musb); + if (ret) { + musb->is_active = 0; + return ret; + } +#endif musb_writeb(regs, MUSB_DEVCTL, devctl); + +#ifdef __UBOOT__ + return 0; +#endif } |