linux-kernel - Re: [PATCH v1 4/4] usb: host: add xhci-exynos module

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Date:   Mon, 7 Mar 2022 11:07:04 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Daehwan Jung <dh10.jung@...sung.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     "open list:USB XHCI DRIVER" <linux-usb@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Howard Yen <howardyen@...gle.com>,
        Jack Pham <jackp@...eaurora.org>,
        Puma Hsu <pumahsu@...gle.com>,
        "J . Avila" <elavila@...gle.com>,
        "chihhao . chen" <chihhao.chen@...iatek.com>, sc.suh@...sung.com,
        cpgs@...sung.com, cpgsproxy5@...sung.com
Subject: Re: [PATCH v1 4/4] usb: host: add xhci-exynos module

On 04/03/2022 07:23, Daehwan Jung wrote:
> Signed-off-by: Daehwan Jung <dh10.jung@...sung.com>

+Cc Randy,
I guess here is the rest of the patches.

> ---
>  drivers/usb/host/xhci-exynos.c | 2025 ++++++++++++++++++++++++++++++++
>  drivers/usb/host/xhci-exynos.h |  150 +++
>  2 files changed, 2175 insertions(+)
>  create mode 100644 drivers/usb/host/xhci-exynos.c
>  create mode 100644 drivers/usb/host/xhci-exynos.h
> 
> diff --git a/drivers/usb/host/xhci-exynos.c b/drivers/usb/host/xhci-exynos.c
> new file mode 100644
> index 000000000000..3913c48d4b20
> --- /dev/null
> +++ b/drivers/usb/host/xhci-exynos.c
> @@ -0,0 +1,2025 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * xhci-exynos.c - xHCI host controller driver platform Bus Glue for Exynos.
> + *
> + * Copyright (C) 2022 Samsung Electronics Incorporated - http://www.samsung.com
> + * Author: Daehwan Jung <dh10.jung@...sung.com>
> + *
> + * A lot of code borrowed from the Linux xHCI driver.

> + */
> +
> +#include <linux/clk.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/usb/phy.h>
> +#include <linux/slab.h>
> +#include <linux/phy/phy.h>
> +#include <linux/acpi.h>
> +#include <linux/usb/of.h>
> +#ifdef CONFIG_SND_EXYNOS_USB_AUDIO

This does not exist.

Please do not add dead code to Linux kernel.

> +#include "../../../sound/usb/exynos_usb_audio.h"
> +#include <linux/types.h>
> +#include "xhci-trace.h"
> +#endif
> +
> +#include "../core/hub.h"
> +#include "../core/phy.h"
> +#include "xhci.h"
> +#include "xhci-plat.h"
> +#include "xhci-mvebu.h"
> +#include "xhci-rcar.h"
> +#include "../dwc3/dwc3-exynos.h"
> +#include "../dwc3/exynos-otg.h"

No, how XHCI is related to dwc3? What if different block provides XHCI,
not DWC3?

> +#include "xhci-exynos.h"
> +#include <soc/samsung/exynos-cpupm.h>

This does not exist and does not even compile.

Please do not send code which does not compile... Also, just in case -
do not send code which compiles but does not work. :)


Best regards,
Krzysztof