linux-kernel - Re: [PATCH 1/1] arm64: dts: rockchip: remove RTC for Radxa E52C

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Message-ID: <6547200DD4E67155+b1fb1848-2f11-4b3e-b556-9386373d23f1@radxa.com>
Date: Thu, 8 Jan 2026 19:17:23 +0900
From: FUKAUMI Naoki <naoki@...xa.com>
To: Chukun Pan <amadeus@....edu.cn>, Heiko Stuebner <heiko@...ech.de>
Cc: Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/1] arm64: dts: rockchip: remove RTC for Radxa E52C

Hi Chukun,

On 1/8/26 19:00, Chukun Pan wrote:
> According to the Radxa E52C Schematic [1], both the i2c5 bus and the
> hym8563 chip are marked as NC. Remove them to avoid the following log:
> 
> rtc-hym8563 5-0051: could not init device, -110
> rtc-hym8563 5-0051: probe with driver rtc-hym8563 failed with error -110
> 
> [1] https://dl.radxa.com/e/e52c/hw/radxa_e52c_v1.2_schematic.pdf

V1.209 and later should have RTC. What version do you have?

Best regards,

--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.

> Fixes: 9be4171219b6 ("arm64: dts: rockchip: Add Radxa E52C")
> Signed-off-by: Chukun Pan <amadeus@....edu.cn>
> ---
>   .../boot/dts/rockchip/rk3582-radxa-e52c.dts   | 24 -------------------
>   1 file changed, 24 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
> index 854c118418eb..c24ff264cae2 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
> @@ -266,24 +266,6 @@ regulator-state-mem {
>   	};
>   };
>   
> -&i2c5 {
> -	pinctrl-names = "default";
> -	pinctrl-0 = <&i2c5m2_xfer>;
> -	status = "okay";
> -
> -	rtc@51 {
> -		compatible = "haoyu,hym8563";
> -		reg = <0x51>;
> -		#clock-cells = <0>;
> -		clock-output-names = "rtcic_32kout";
> -		interrupt-parent = <&gpio0>;
> -		interrupts = <RK_PB0 IRQ_TYPE_LEVEL_LOW>;
> -		pinctrl-names = "default";
> -		pinctrl-0 = <&rtc_int_l>;
> -		wakeup-source;
> -	};
> -};
> -
>   &pcie2x1l1 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&pcie20x1_1_perstn_m1>;
> @@ -329,12 +311,6 @@ vcc_5v0_pwren_h: vcc-5v0-pwren-h {
>   		};
>   	};
>   
> -	rtc {
> -		rtc_int_l: rtc-int-l {
> -			rockchip,pins = <0 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
> -		};
> -	};
> -
>   	usb {
>   		usb_otg_pwren_h: usb-otg-pwren-h {
>   			rockchip,pins = <0 RK_PD4 RK_FUNC_GPIO &pcfg_pull_none>;