[U-Boot] Targets with xHCI but without DM_USB

[Bin Meng]

Hi Vignesh,

On Thu, Jun 29, 2017 at 2:41 PM, Vignesh R <vigneshr at ti.com> wrote:
> Hi Stefan,
>
> On Thursday 29 June 2017 11:15 AM, Stefan Roese wrote:
>> Hi,
>>
>> as you might have noticed, Bin Meng is currently greatly improving
>> the U-Boot xHCI support. While doing this, he noticed that some
>> additions are more complex and especially ugly to add, since some
>> users of the xHCI support have not enabled CONFIG_DM_USB. This
>> adds ugly #ifdef's, which we really would like to avoid. Because
>> of this we checked, which boards exactly are using xHCI without
>> DM_USB enabled. Here a complete list of all the boards:
>>
>> ls1012ardb_qspi_SECURE_BOOT
>> ls1021atwr_nor_SECURE_BOOT
>> am43xx_hs_evm
>> am57xx_hs_evm
>> ls1021aqds_nand
>> ls1021atwr_nor
>> ls1021atwr_qspi
>> cm_t43
>> ls1021atwr_nor_lpuart
>> ls1021aqds_sdcard_qspi
>> k2hk_hs_evm
>> am43xx_evm
>> ls1021aqds_qspi
>> am57xx_evm_nodt
>> k2g_hs_evm
>> ls1021atwr_sdcard_qspi
>> am43xx_evm_ethboot
>> ls1021aqds_sdcard_ifc
>> k2l_evm
>> am43xx_evm_usbhost_boot
>> am43xx_evm_qspiboot
>> k2g_evm
>> am57xx_evm
>> ls1021atwr_sdcard_ifc
>> cl-som-am57x
>> k2hk_evm
>> k2e_evm
>> ls1021atwr_sdcard_ifc_SECURE_BOOT
>> ls1021aqds_nor_SECURE_BOOT
>> k2e_hs_evm
>
> For TI platforms, there is some work needed to convert xhci-dwc3,
> xhci-omap and xhci-keystone to DM (under drivers/usb/host)
>
> But the bigger concern of enabling DM_USB is with gadget framework,
> which is not DM compliant yet. There is a significant amount work[1][2]
> there before dwc3 gadget can be moved to DM and we can enable DM_USB.
>
> [1]https://lists.denx.de/pipermail/u-boot/2017-June/296081.html
> [2]https://lists.denx.de/pipermail/u-boot/2017-June/295370.html

I thought gadget and host support are separate, so host support like
xHCI can be moved to DM without affecting gadget support, no? Are they
sharing some codes?

Other board maintainers, your comments are welcome.

Regards,
Bin