linux-kernel - Re: [PATCH v1] arch: arm64: dts: meson: a1: add assigned-clocks for usb node

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Date: Thu, 1 Feb 2024 15:30:33 +0000
From: Alexey Romanov <avromanov@...utedevices.com>
To: "robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>, "neil.armstrong@...aro.org"
	<neil.armstrong@...aro.org>, "khilman@...libre.com" <khilman@...libre.com>,
	"jbrunet@...libre.com" <jbrunet@...libre.com>,
	"martin.blumenstingl@...glemail.com" <martin.blumenstingl@...glemail.com>
CC: "linux-amlogic@...ts.infradead.org" <linux-amlogic@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, kernel <kernel@...rdevices.ru>,
	Dmitry Rokosov <ddrokosov@...utedevices.com>
Subject: Re: [PATCH v1] arch: arm64: dts: meson: a1: add assigned-clocks for
 usb node

Hello! Ping.

On Wed, Jan 24, 2024 at 04:06:23PM +0300, Alexey Romanov wrote:
> To ensure proper functionality of USB, it is necessary to use
> the rate of 64000000 for CLKID_USB_BUS. For instance, adb may
> not function correctly without this setting. This information
> has been derived from the vendor SDK.
> 
> Signed-off-by: Alexey Romanov <avromanov@...utedevices.com>
> Signed-off-by: Dmitry Rokosov <ddrokosov@...utedevices.com>
> ---
>  arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> index cf150f568335..b9fd69112535 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> @@ -668,6 +668,8 @@ usb: usb@...04400 {
>  				 <&clkc_periphs CLKID_USB_BUS>,
>  				 <&clkc_periphs CLKID_USB_CTRL_IN>;
>  			clock-names = "usb_ctrl", "usb_bus", "xtal_usb_ctrl";
> +			assigned-clocks = <&clkc_periphs CLKID_USB_BUS>;
> +			assigned-clock-rates = <64000000>;
>  			resets = <&reset RESET_USBCTRL>;
>  			reset-name = "usb_ctrl";
>  
> -- 
> 2.34.1
> 

-- 
Thank you,
Alexey