linux-kernel - Re: [PATCH] arm64: dts imx8mn: Remove non-existent USB OTG2

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Message-ID: <20201008170929.GA6018@kozik-lap>
Date:   Thu, 8 Oct 2020 19:09:29 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Adam Ford <aford173@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, aford@...conembedded.com,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Anson Huang <Anson.Huang@....com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts imx8mn: Remove non-existent USB OTG2

On Thu, Oct 08, 2020 at 10:19:33AM -0500, Adam Ford wrote:
> According to the i.MX8MN TRM, there is only one OTG port.  The
> address for OTG2 is reserved on Nano.
> 
> This patch removes the non-existent OTG2.
> 
> Fixes: 6c3debcbae47 ("arm64: dts: freescale: Add i.MX8MN dtsi support")
> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> index 746faf1cf2fb..ac206e1f2dad 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> @@ -791,21 +791,6 @@ usbmisc1: usbmisc@...40200 {
>  				reg = <0x32e40200 0x200>;
>  			};
>  
> -			usbotg2: usb@...50000 {
> -				compatible = "fsl,imx8mn-usb", "fsl,imx7d-usb";
> -				reg = <0x32e50000 0x200>;
> -				interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
> -				clocks = <&clk IMX8MN_CLK_USB1_CTRL_ROOT>;
> -				clock-names = "usb1_ctrl_root_clk";
> -				assigned-clocks = <&clk IMX8MN_CLK_USB_BUS>,
> -						  <&clk IMX8MN_CLK_USB_CORE_REF>;
> -				assigned-clock-parents = <&clk IMX8MN_SYS_PLL2_500M>,
> -							 <&clk IMX8MN_SYS_PLL1_100M>;
> -				fsl,usbphy = <&usbphynop2>;
> -				fsl,usbmisc = <&usbmisc2 0>;
> -				status = "disabled";
> -			};
> -
>  			usbmisc2: usbmisc@...50200 {
>  				compatible = "fsl,imx8mn-usbmisc", "fsl,imx7d-usbmisc";
>  				#index-cells = <1>;

Good catch but please also remove usbmisc2 and the usbphy nodes.

Best regards,
Krzysztof