linux-kernel - Re: [PATCH 3/3] ARM: dts: imx6q-evi: Fix onboard hub reset line

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Date:	Fri, 12 Aug 2016 11:11:58 +0800
From:	Peter Chen <hzpeterchen@...il.com>
To:	Joshua Clayton <stillcompiling@...il.com>
Cc:	Shawn Guo <shawnguo@...nel.org>, gregkh@...uxfoundation.org,
	stern@...land.harvard.edu, ulf.hansson@...aro.org,
	broonie@...nel.org, sre@...nel.org, robh+dt@...nel.org,
	dbaryshkov@...il.com, dwmw3@...radead.org, k.kozlowski@...sung.com,
	linux-arm-kernel@...ts.infradead.org, p.zabel@...gutronix.de,
	devicetree@...r.kernel.org, pawel.moll@....com,
	mark.rutland@....com, linux-usb@...r.kernel.org, arnd@...db.de,
	s.hauer@...gutronix.de, mail@...iej.szmigiero.name,
	troy.kisky@...ndarydevices.com, festevam@...il.com,
	oscar@...andei.net, stephen.boyd@...aro.org,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	mka@...omium.org
Subject: Re: [PATCH 3/3] ARM: dts: imx6q-evi: Fix onboard hub reset line

On Thu, Aug 11, 2016 at 09:40:32AM -0700, Joshua Clayton wrote:
> Previously the onboard hub was made to work by treating its
> reset gpio as a regulator enable.
> Get rid of that kludge now that pwseq has added reset gpio support
> Move pin muxing the hub reset pin into the usbh1 group
> 
> Signed-off-by: Joshua Clayton <stillcompiling@...il.com>
> ---
>  arch/arm/boot/dts/imx6q-evi.dts | 25 +++++++------------------
>  1 file changed, 7 insertions(+), 18 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/imx6q-evi.dts b/arch/arm/boot/dts/imx6q-evi.dts
> index 4fa5601..49c6f61 100644
> --- a/arch/arm/boot/dts/imx6q-evi.dts
> +++ b/arch/arm/boot/dts/imx6q-evi.dts
> @@ -54,18 +54,6 @@
>  		reg = <0x10000000 0x40000000>;
>  	};
>  
> -	reg_usbh1_vbus: regulator-usbhubreset {
> -		compatible = "regulator-fixed";
> -		regulator-name = "usbh1_vbus";
> -		regulator-min-microvolt = <5000000>;
> -		regulator-max-microvolt = <5000000>;
> -		enable-active-high;
> -		startup-delay-us = <2>;
> -		pinctrl-names = "default";
> -		pinctrl-0 = <&pinctrl_usbh1_hubreset>;
> -		gpio = <&gpio7 12 GPIO_ACTIVE_HIGH>;
> -	};
> -
>  	reg_usb_otg_vbus: regulator-usbotgvbus {
>  		compatible = "regulator-fixed";
>  		regulator-name = "usb_otg_vbus";
> @@ -204,12 +192,18 @@
>  };
>  
>  &usbh1 {
> -	vbus-supply = <&reg_usbh1_vbus>;
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_usbh1>;
>  	dr_mode = "host";
>  	disable-over-current;
>  	status = "okay";
> +
> +	usb2415host: hub@1 {
> +		compatible = "usb424,2513";
> +		reg = <1>;
> +		reset-gpios = <&gpio7 12 GPIO_ACTIVE_LOW>;
> +		reset-duration-us = <3000>;
> +	};
>  };
>  
>  &usbotg {
> @@ -467,11 +461,6 @@
>  			MX6QDL_PAD_GPIO_3__USB_H1_OC 0x1b0b0
>  			/* usbh1_b OC */

This comment should be for above pin, do you mind I change it in
this patch?

>  			MX6QDL_PAD_GPIO_0__GPIO1_IO00 0x1b0b0
> -		>;
> -	};
> -
> -	pinctrl_usbh1_hubreset: usbh1hubresetgrp {
> -		fsl,pins = <
>  			MX6QDL_PAD_GPIO_17__GPIO7_IO12 0x1b0b0
>  		>;
>  	};

This changes remind me that I need to change the same thing for udoo
board.

-- 

Best Regards,
Peter Chen