linux-kernel - Re: [PATCH v2 6/7] arm64: dts: allwinner: a523: Add MCU PRCM CCU node

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Message-ID: <2380002.ElGaqSPkdT@jernej-laptop>
Date: Thu, 11 Sep 2025 20:46:03 +0200
From: Jernej Škrabec <jernej.skrabec@...il.com>
To: Stephen Boyd <sboyd@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
 Jernej Skrabec <jernej@...nel.org>, Samuel Holland <samuel@...lland.org>,
 Chen-Yu Tsai <wens@...nel.org>
Cc: Andre Przywara <andre.przywara@....com>, linux-sunxi@...ts.linux.dev,
 linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/7] arm64: dts: allwinner: a523: Add MCU PRCM CCU node

Dne četrtek, 11. september 2025 ob 19:47:09 Srednjeevropski poletni čas je Chen-Yu Tsai napisal(a):
> From: Chen-Yu Tsai <wens@...e.org>
> 
> Add a device node for the third supported clock controller found in the
> A523 / T527 SoCs. This controller has clocks and resets for the RISC-V
> MCU, and others peripherals possibly meant to operate in low power mode
> driven by the MCU, such as audio interfaces, an audio DSP, and the NPU.
> 
> Reviewed-by: Andre Przywara <andre.przywara@....com>
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej

> ---
> Changes since v1:
> - Enlarged MCU PRCM register range to 0x200
> - Moved "r-ahb" clock to the end of the list and added "r-apb0" clock
> ---
>  .../arm64/boot/dts/allwinner/sun55i-a523.dtsi | 27 +++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
> index 79bd9ce08c7c..f93376372aba 100644
> --- a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
> @@ -4,8 +4,10 @@
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/clock/sun6i-rtc.h>
>  #include <dt-bindings/clock/sun55i-a523-ccu.h>
> +#include <dt-bindings/clock/sun55i-a523-mcu-ccu.h>
>  #include <dt-bindings/clock/sun55i-a523-r-ccu.h>
>  #include <dt-bindings/reset/sun55i-a523-ccu.h>
> +#include <dt-bindings/reset/sun55i-a523-mcu-ccu.h>
>  #include <dt-bindings/reset/sun55i-a523-r-ccu.h>
>  #include <dt-bindings/power/allwinner,sun55i-a523-ppu.h>
>  #include <dt-bindings/power/allwinner,sun55i-a523-pck-600.h>
> @@ -825,6 +827,31 @@ rtc: rtc@...0000 {
>  			clock-names = "bus", "hosc", "ahb";
>  			#clock-cells = <1>;
>  		};
> +
> +		mcu_ccu: clock-controller@...2000 {
> +			compatible = "allwinner,sun55i-a523-mcu-ccu";
> +			reg = <0x7102000 0x200>;
> +			clocks = <&osc24M>,
> +				 <&rtc CLK_OSC32K>,
> +				 <&rtc CLK_IOSC>,
> +				 <&ccu CLK_PLL_AUDIO0_4X>,
> +				 <&ccu CLK_PLL_PERIPH0_300M>,
> +				 <&ccu CLK_DSP>,
> +				 <&ccu CLK_MBUS>,
> +				 <&r_ccu CLK_R_AHB>,
> +				 <&r_ccu CLK_R_APB0>;
> +			clock-names = "hosc",
> +				      "losc",
> +				      "iosc",
> +				      "pll-audio0-4x",
> +				      "pll-periph0-300m",
> +				      "dsp",
> +				      "mbus",
> +				      "r-ahb",
> +				      "r-apb0";
> +			#clock-cells = <1>;
> +			#reset-cells = <1>;
> +		};
>  	};
>  
>  	thermal-zones {
>