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

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Date:   Mon, 7 Mar 2022 19:26:11 +0900
From:   Jung Daehwan <dh10.jung@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        "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 Mon, Mar 07, 2022 at 11:07:04AM +0100, Krzysztof Kozlowski wrote:
> 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. :)
> 

Hi Krzysztof

I'm sorry to confuse you. But, it's just for reference module to introduce
new feature. That's why I just submitted source code and header without
makefile. It's not going to compiled at all now.

Best Regards,
Jung Deahwan

> 
> Best regards,
> Krzysztof
>