Re: [PATCH v2 2/4] usb: xhci: xhci-plat: Add support for Broadcom STB SoC's

Mathias Nyman
2020-03-31T09:35:06Z

On 27.3.2020 22.47, Al Cooper wrote:
> Add support for Broadcom STB SoC's to the xhci platform driver
>
> Signed-off-by: Al Cooper <alcooperx@gmail.com>
> ---
> drivers/usb/host/xhci-brcm.c | 16 ++++++++++++++++
> drivers/usb/host/xhci-brcm.h | 16 ++++++++++++++++
> drivers/usb/host/xhci-plat.c | 11 +++++++++++
> 3 files changed, 43 insertions(+)
> create mode 100644 drivers/usb/host/xhci-brcm.c
> create mode 100644 drivers/usb/host/xhci-brcm.h
>
> diff --git a/drivers/usb/host/xhci-brcm.c b/drivers/usb/host/xhci-brcm.c
> new file mode 100644
> index 000000000000..bf8c0bfd1780
> --- /dev/null
> +++ b/drivers/usb/host/xhci-brcm.c
> @@ -0,0 +1,16 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (c) 2018, Broadcom */
> +
> +#include <linux/usb.h>
> +#include <linux/usb/hcd.h>
> +
> +#include "xhci.h"
> +
> +int xhci_plat_brcm_init_quirk(struct usb_hcd *hcd)
> +{
> + struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> +
> + xhci->quirks |= XHCI_RESET_ON_RESUME;
> + return 0;
> +}
> +

If there's nothing else than one quirk flag needed for Broadcom STB Soc
it would be simpler to add it directly to the xhci_plat_brcm structure.

No need to add xhci-brcm.c or xhci-brcm.h files, or any xhci Makfile or Kconfig
changes

> diff --git a/drivers/usb/host/xhci-brcm.h b/drivers/usb/host/xhci-brcm.h
> new file mode 100644
> index 000000000000..e64800fae4d5
> --- /dev/null
> +++ b/drivers/usb/host/xhci-brcm.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/* Copyright (c) 2018, Broadcom */
> +
> +#ifndef _XHCI_BRCM_H
> +#define _XHCI_BRCM_H
> +
> +#if IS_ENABLED(CONFIG_USB_XHCI_BRCM)
> +int xhci_plat_brcm_init_quirk(struct usb_hcd *hcd);
> +#else
> +static inline int xhci_plat_brcm_init_quirk(struct usb_hcd *hcd)
> +{
> + return 0;
> +}
> +#endif
> +#endif /* _XHCI_BRCM_H */
> +
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index 315b4552693c..3e90a1207803 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -22,6 +22,7 @@
>
> #include "xhci.h"
> #include "xhci-plat.h"
> +#include "xhci-brcm.h"
> #include "xhci-mvebu.h"
> #include "xhci-rcar.h"
>
> @@ -112,6 +113,10 @@ static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
> SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V3)
> };
>
> +static const struct xhci_plat_priv xhci_plat_brcm = {
> + .init_quirk = xhci_plat_brcm_init_quirk,
> +};
> +

So something like this instead:

static const struct xhci_plat_priv xhci_plat_brcm = {
.quirks = XHCI_RESET_ON_RESUME,
};

-Mathias