linux-kernel - Re: [PATCH v4 2/2] usb: Add support for ACPI identification to xhci-platform

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Date:	Fri, 7 Aug 2015 18:29:05 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Duc Dang <dhdang@....com>
Cc:	Loc Ho <lho@....com>, USB list <linux-usb@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	mathias.nyman@...el.com, Mark Langsdorf <mlangsdo@...hat.com>,
	patches <patches@....com>, Feng Kan <fkan@....com>
Subject: Re: [PATCH v4 2/2] usb: Add support for ACPI identification to
 xhci-platform

On Fri, Aug 07, 2015 at 06:03:36PM -0700, Duc Dang wrote:
> Provide the methods to let ACPI identify the need to use
> xhci-platform. Change the Kconfig files so the
> xhci-plat.o file is selectable during kernel config.
> 
> This has been tested on an ARM64 machine with platform XHCI, an
> x86_64 machine with XHCI, and an x86_64 machine without XHCI.
> There were no regressions or error messages on the machines
> without platform XHCI.
> 
> [dhdang: regenerate the patch over 4.2-rc5]
> Signed-off-by: Mark Langsdorf <mlangsdo@...hat.com>
> Signed-off-by: Duc Dang <dhdang@....com>
> 
> ---
> Changes from v3:
> 	Regenerate the patch over 4.2-rc5
> 	No code change
> 
> Changes from v2
> 	Replaced tristate with a boolean as the driver doesn't
> 		compile as a module
> 	Correct --help-- to ---help---
> 
> Changes from v1
> 	Renamed from "add support for APM X-Gene to xhci-platform"
> 	Removed changes to arm64/Kconfig
> 	Made CONFIG_USB_XHCI_PLATFORM a user selectable config option
> 
>  drivers/usb/host/Kconfig     |  7 ++++++-
>  drivers/usb/host/xhci-plat.c | 11 +++++++++++
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 8afc3c1..96231ee 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -32,7 +32,12 @@ config USB_XHCI_PCI
>         default y
>  
>  config USB_XHCI_PLATFORM
> -	tristate
> +	tristate "xHCI platform driver support"
> +	---help---
> +	  Say 'Y' to enable the support for the xHCI host controller
> +	  as a platform device. Many ARM SoCs provide USB this way.
> +
> +	  If unsure, say 'Y'.
>  
>  config USB_XHCI_MVEBU
>  	tristate "xHCI support for Marvell Armada 375/38x"
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index 5d03f8b..14b40d2 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -19,6 +19,7 @@
>  #include <linux/usb/phy.h>
>  #include <linux/slab.h>
>  #include <linux/usb/xhci_pdriver.h>
> +#include <linux/acpi.h>
>  
>  #include "xhci.h"
>  #include "xhci-mvebu.h"
> @@ -262,6 +263,15 @@ static const struct of_device_id usb_xhci_of_match[] = {
>  MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
>  #endif
>  
> +#ifdef CONFIG_ACPI

You shoudn't need this #ifdef, right?

thanks,

greg k-h
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