linux-kernel - Re: [PATCH 4/9] ARM: S3C64XX: add USB host support for mach-real6410

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Message-ID: <AANLkTinvnjpxDeLXQdw7Og-0urC3Ui2p-TEejaqBUZPn@mail.gmail.com>
Date:	Tue, 19 Oct 2010 09:15:46 +0300
From:	Darius Augulis <augulis.darius@...il.com>
To:	Kukjin Kim <kgene.kim@...sung.com>
Cc:	linux-arm-kernel@...ts.infradead.org, paulius.zaleckas@...il.com,
	linux-kernel@...r.kernel.org, ben-linux@...ff.org
Subject: Re: [PATCH 4/9] ARM: S3C64XX: add USB host support for mach-real6410

On Tue, Oct 19, 2010 at 5:41 AM, Kukjin Kim <kgene.kim@...sung.com> wrote:
> Darius Augulis wrote:
>>
>> On Mon, Oct 18, 2010 at 4:39 PM, Kukjin Kim <kgene.kim@...sung.com> wrote:
>> > Darius Augulis wrote:
>> >>
>> >> Add USB host device support for mach-real6410
>> >>
>> >> Signed-off-by: Darius Augulis <augulis.darius@...il.com>
>> >> ---
>> >>  arch/arm/mach-s3c64xx/Kconfig         |    1 +
>> >>  arch/arm/mach-s3c64xx/mach-real6410.c |    1 +
>> >>  2 files changed, 2 insertions(+), 0 deletions(-)
>> >>
>> >> diff --git a/arch/arm/mach-s3c64xx/Kconfig
> b/arch/arm/mach-s3c64xx/Kconfig
>> >> index b706b80..c05ae12 100644
>> >> --- a/arch/arm/mach-s3c64xx/Kconfig
>> >> +++ b/arch/arm/mach-s3c64xx/Kconfig
>> >> @@ -109,6 +109,7 @@ config MACH_REAL6410
>> >>       select S3C_DEV_NAND
>> >>       select SAMSUNG_DEV_ADC
>> >>       select SAMSUNG_DEV_TS
>> >> +     select S3C_DEV_USB_HOST
>> >>       help
>> >>         Machine support for the CoreWind REAL6410
>> >>
>> >> diff --git a/arch/arm/mach-s3c64xx/mach-real6410.c b/arch/arm/mach-
>> >> s3c64xx/mach-real6410.c
>> >> index bad6990..00e7d7e 100644
>> >> --- a/arch/arm/mach-s3c64xx/mach-real6410.c
>> >> +++ b/arch/arm/mach-s3c64xx/mach-real6410.c
>> >> @@ -195,6 +195,7 @@ static struct platform_device *real6410_devices[]
>> >> __initdata = {
>> >>       &s3c_device_nand,
>> >>       &s3c_device_adc,
>> >>       &s3c_device_ts,
>> >> +     &s3c_device_ohci,
>> >>  };
>> >>
>> >>  static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
>> >
>> > No need any gpio configuration for it?
>>
>> No, USB is powered by hardware at startup and does not need any other
>> gpio config.
>>
>
> Hmm...firstly see below...
>
> +-----+        +------ UTMI -------- OTG Device
> | PHY |--------|
> +-----+        +--- Serial I/F 1 --- Host 1.1 (1port)
>
> +---------------+
> |USB Transceiver|-- Serial I/F 2 --- Host 1.1 (1port)
> +---------------+
>
> If you want to use only 1port Host 1.1 through Serial I/F2, your code is ok.
> but want to use 2-port Host 1.1, need to set configuration of PHY
> initialization and clock path for Serial I/F1.
> I meant that.

Clear. Both real6410 and mini6410 have only single USB host connector
and it seems it is connected to Serial I/F 2, because it works with no
additional configuration.

>
> Thanks.
>
> Best regards,
> Kgene.
> --
> Kukjin Kim <kgene.kim@...sung.com>, Senior Engineer,
> SW Solution Development Team, Samsung Electronics Co., Ltd.
>
>
>
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