On Saturday 25 May 2013, Adrien Vergé wrote:
> On OMAP4 platforms, EHCI HCD needs the physical layer signalling
> activated, along with the NOP USB Transceiver driver. Otherwise, the
> kernel boots without registering any USB device.
This does not actually sound like a critical error: If a user forgets
to enable a driver, that driver will not be loaded. Of course the
kernel should not just crash when a non-essential driver is missing,
and it should not fail to build, but your description sounds harmless.
Am I missing something?
> This patch applies to Linux 3.10-rc2.
>
> Signed-off-by: Adrien Vergé <adrienve...@gmail.com>
> ---
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index de94f26..47959d7 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -44,6 +44,8 @@ endif # USB_XHCI_HCD
> config USB_EHCI_HCD
> tristate "EHCI HCD (USB 2.0) support"
This is the wrong place: it should be in USB_EHCI_HCD_OMAP
if any.
> depends on USB_ARCH_HAS_EHCI
> + select USB_PHY if ARCH_OMAP4
> + select NOP_USB_XCEIV if ARCH_OMAP4
> ---help---
> The Enhanced Host Controller Interface (EHCI) is standard for USB
> 2.0
> "high speed" (480 Mbit/sec, 60 Mbyte/sec) host controller hardware.
'select'ing USB_PHY sounds wrong too, I think you mean 'depends on'.
Also note that Roger Quadros has just removed the 'select NOP_USB_XCEIV'
there, I think you should coordinate with him.
Arnd
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