From: sylvain.rochet@finsecur.com (Sylvain Rochet)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/3] ARM: at91: dt: at91sam9n12ek: enable udp
Date: Mon, 9 Feb 2015 11:04:04 +0100 [thread overview]
Message-ID: <20150209100404.GA17242@gradator.net> (raw)
In-Reply-To: <1423472572-19824-4-git-send-email-voice.shen@atmel.com>
Hello Bo,
On Mon, Feb 09, 2015 at 05:02:52PM +0800, Bo Shen wrote:
> Enable usb device port on at91sam9n12ek board.
>
> Signed-off-by: Bo Shen <voice.shen@atmel.com>
> ---
>
> arch/arm/boot/dts/at91sam9n12ek.dts | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/at91sam9n12ek.dts b/arch/arm/boot/dts/at91sam9n12ek.dts
> index 13bb24e..3e572e5 100644
> --- a/arch/arm/boot/dts/at91sam9n12ek.dts
> +++ b/arch/arm/boot/dts/at91sam9n12ek.dts
> @@ -120,6 +120,11 @@
> };
> };
>
> + usb1: gadget at f803c000 {
> + atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;
> + status = "okay";
> + };
> +
There is an external resistor divider on PB16, acting like a pull-down
(R22+R23). PB16 reset state is input, pull-up, schmitt trigger, you need
to disable the pull-up in pinctrl this way:
usb1: gadget at f803c000 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_board_usb1>;
?
}
pinctrl ? {
usb1 {
pinctrl_board_usb1: usb1-board {
atmel,pins = <AT91_PIOB 16 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>; /* PB16, no pull up and deglitch */
};
};
};
Sylvain
WARNING: multiple messages have this Message-ID (diff)
From: Sylvain Rochet <sylvain.rochet-ETtyaVkrhkNWk0Htik3J/w@public.gmane.org>
To: Bo Shen <voice.shen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
Cc: balbi-l0cyMroinI0@public.gmane.org,
nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH 3/3] ARM: at91: dt: at91sam9n12ek: enable udp
Date: Mon, 9 Feb 2015 11:04:04 +0100 [thread overview]
Message-ID: <20150209100404.GA17242@gradator.net> (raw)
In-Reply-To: <1423472572-19824-4-git-send-email-voice.shen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
Hello Bo,
On Mon, Feb 09, 2015 at 05:02:52PM +0800, Bo Shen wrote:
> Enable usb device port on at91sam9n12ek board.
>
> Signed-off-by: Bo Shen <voice.shen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
> ---
>
> arch/arm/boot/dts/at91sam9n12ek.dts | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/at91sam9n12ek.dts b/arch/arm/boot/dts/at91sam9n12ek.dts
> index 13bb24e..3e572e5 100644
> --- a/arch/arm/boot/dts/at91sam9n12ek.dts
> +++ b/arch/arm/boot/dts/at91sam9n12ek.dts
> @@ -120,6 +120,11 @@
> };
> };
>
> + usb1: gadget@f803c000 {
> + atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;
> + status = "okay";
> + };
> +
There is an external resistor divider on PB16, acting like a pull-down
(R22+R23). PB16 reset state is input, pull-up, schmitt trigger, you need
to disable the pull-up in pinctrl this way:
usb1: gadget@f803c000 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_board_usb1>;
…
}
pinctrl … {
usb1 {
pinctrl_board_usb1: usb1-board {
atmel,pins = <AT91_PIOB 16 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>; /* PB16, no pull up and deglitch */
};
};
};
Sylvain
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WARNING: multiple messages have this Message-ID (diff)
From: Sylvain Rochet <sylvain.rochet@finsecur.com>
To: Bo Shen <voice.shen@atmel.com>
Cc: balbi@ti.com, nicolas.ferre@atmel.com,
devicetree@vger.kernel.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/3] ARM: at91: dt: at91sam9n12ek: enable udp
Date: Mon, 9 Feb 2015 11:04:04 +0100 [thread overview]
Message-ID: <20150209100404.GA17242@gradator.net> (raw)
In-Reply-To: <1423472572-19824-4-git-send-email-voice.shen@atmel.com>
Hello Bo,
On Mon, Feb 09, 2015 at 05:02:52PM +0800, Bo Shen wrote:
> Enable usb device port on at91sam9n12ek board.
>
> Signed-off-by: Bo Shen <voice.shen@atmel.com>
> ---
>
> arch/arm/boot/dts/at91sam9n12ek.dts | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/at91sam9n12ek.dts b/arch/arm/boot/dts/at91sam9n12ek.dts
> index 13bb24e..3e572e5 100644
> --- a/arch/arm/boot/dts/at91sam9n12ek.dts
> +++ b/arch/arm/boot/dts/at91sam9n12ek.dts
> @@ -120,6 +120,11 @@
> };
> };
>
> + usb1: gadget@f803c000 {
> + atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;
> + status = "okay";
> + };
> +
There is an external resistor divider on PB16, acting like a pull-down
(R22+R23). PB16 reset state is input, pull-up, schmitt trigger, you need
to disable the pull-up in pinctrl this way:
usb1: gadget@f803c000 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_board_usb1>;
…
}
pinctrl … {
usb1 {
pinctrl_board_usb1: usb1-board {
atmel,pins = <AT91_PIOB 16 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>; /* PB16, no pull up and deglitch */
};
};
};
Sylvain
next prev parent reply other threads:[~2015-02-09 10:04 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-09 9:02 [PATCH 0/3] ARM: at91: at91sam9n12ek: enable usb gadget support Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 9:02 ` [PATCH 1/3] USB: gadget: at91_udc: add at91sam9n12 support Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 11:14 ` Alexandre Belloni
2015-02-09 11:14 ` Alexandre Belloni
2015-02-10 1:25 ` Bo Shen
2015-02-10 1:25 ` Bo Shen
2015-02-10 1:25 ` Bo Shen
2015-02-09 9:02 ` [PATCH 2/3] ARM: at91: dt: at91sam9n12: add udp device node Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 9:02 ` [PATCH 3/3] ARM: at91: dt: at91sam9n12ek: enable udp Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 9:02 ` Bo Shen
2015-02-09 10:04 ` Sylvain Rochet [this message]
2015-02-09 10:04 ` Sylvain Rochet
2015-02-09 10:04 ` Sylvain Rochet
2015-02-09 10:23 ` Bo Shen
2015-02-09 10:23 ` Bo Shen
2015-02-09 10:23 ` Bo Shen
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