[PATCH v3 0/3] arm64: dts: rockchip: Update Radxa E52C support

[PATCH v3 0/3] arm64: dts: rockchip: Update Radxa E52C support

[Chukun Pan]

Changed from v3:
  Add vcc_3v3_pmu label to vcc_3v3_s3

Changed from v2:
  Remove merged patches
  Remove VCC_3V3_PMU for Radxa E52C (new)
  Update pinctrl names for Radxa E52C (new)
  Update commit message for disabling display subsystem

Chukun Pan (3):
  arm64: dts: rockchip: disable display subsystem for Radxa E52C
  arm64: dts: rockchip: remove vcc_3v3_pmu regulator for Radxa E52C
  arm64: dts: rockchip: update pinctrl names for Radxa E52C

 .../boot/dts/rockchip/rk3582-radxa-e52c.dts   | 30 ++++++++-----------
 1 file changed, 12 insertions(+), 18 deletions(-)

-- 
2.25.1

[PATCH v3 1/3] arm64: dts: rockchip: disable display subsystem for Radxa E52C

[Chukun Pan]

The Radxa E52C SBC do not have HDMI output, so disable
the display subsystem to avoid the following error log:

*ERROR* No available vop found for display-subsystem.

Fixes: 9be4171219b6 ("arm64: dts: rockchip: Add Radxa E52C")
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
---
 arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
index 48ddc43e2ab5..1883bd183396 100644
--- a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
@@ -207,6 +207,10 @@ &cpu_l3 {
 	cpu-supply = <&vdd_cpu_lit_s0>;
 };
 
+&display_subsystem {
+	status = "disabled";
+};
+
 &i2c0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c0m2_xfer>;
-- 
2.25.1

Re: [PATCH v3 1/3] arm64: dts: rockchip: disable display subsystem for Radxa E52C

[Heiko Stübner]

Am Montag, 1. September 2025, 12:00:25 Mitteleuropäische Sommerzeit schrieb Chukun Pan:
> The Radxa E52C SBC do not have HDMI output, so disable
> the display subsystem to avoid the following error log:
> 
> *ERROR* No available vop found for display-subsystem.
> 
> Fixes: 9be4171219b6 ("arm64: dts: rockchip: Add Radxa E52C")
> Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>

I'm torn on the approach vs. just removing the error line in the driver.

Returning -ENODEV from rockchip_drm_platform_of_probe() is correct,
but the error log could just be a debug one instead.

Because running a system without active vops is obviously fine.


Heiko

> ---
>  arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
> index 48ddc43e2ab5..1883bd183396 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
> @@ -207,6 +207,10 @@ &cpu_l3 {
>  	cpu-supply = <&vdd_cpu_lit_s0>;
>  };
>  
> +&display_subsystem {
> +	status = "disabled";
> +};
> +
>  &i2c0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&i2c0m2_xfer>;
> 

Re: [PATCH v3 1/3] arm64: dts: rockchip: disable display subsystem for Radxa E52C

[Chukun Pan]

Hi,

> I'm torn on the approach vs. just removing the error line in the driver.
>
> Returning -ENODEV from rockchip_drm_platform_of_probe() is correct,
> but the error log could just be a debug one instead.
>
> Because running a system without active vops is obviously fine.

We have disabled the display subsystem in the device tree for some
rk3328/rk3568 SBC. Not sure if drm allows silencing this log, I'll
try to send a patch.

Thanks,
Chukun

[PATCH v3 2/3] arm64: dts: rockchip: remove vcc_3v3_pmu regulator for Radxa E52C

[Chukun Pan]

According to Radxa E52C Schematic V1.2 [1] page 5, vcc_3v3_pmu
is directly connected to vcc_3v3_s3 via a 0 ohm resistor.
The vcc_3v3_pmu is not a new regulator, so remove it.

[1] https://dl.radxa.com/e/e52c/hw/radxa_e52c_v1.2_schematic.pdf

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
---
 arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
index 1883bd183396..302a30e423ad 100644
--- a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
@@ -98,16 +98,6 @@ vcc_1v1_nldo_s3: regulator-1v1 {
 		vin-supply = <&vcc_sysin>;
 	};
 
-	vcc_3v3_pmu: regulator-3v3-0 {
-		compatible = "regulator-fixed";
-		regulator-name = "vcc_3v3_pmu";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		vin-supply = <&vcc_3v3_s3>;
-	};
-
 	vcc_3v3_s0: regulator-3v3-1 {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc_3v3_s0";
@@ -542,7 +532,7 @@ regulator-state-mem {
 				};
 			};
 
-			vcc_3v3_s3: dcdc-reg8 {
+			vcc_3v3_s3: vcc_3v3_pmu: dcdc-reg8 {
 				regulator-name = "vcc_3v3_s3";
 				regulator-always-on;
 				regulator-boot-on;
-- 
2.25.1

[PATCH v3 3/3] arm64: dts: rockchip: update pinctrl names for Radxa E52C

[Chukun Pan]

Updated the pinctrl names of the user key and power LED according
to the schematic. Also updated the nodenames of other pinctrls.

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
---
 arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
index 302a30e423ad..5d000b9e49a8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts
@@ -42,7 +42,7 @@ button-0 {
 	keys-1 {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
-		pinctrl-0 = <&btn_0>;
+		pinctrl-0 = <&pwm15_ir_m1>;
 
 		button-1 {
 			label = "User";
@@ -55,7 +55,7 @@ button-1 {
 	leds-0 {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
-		pinctrl-0 = <&led_0>;
+		pinctrl-0 = <&power_led>;
 
 		led-0 {
 			color = <LED_COLOR_ID_GREEN>;
@@ -306,13 +306,13 @@ &pcie2x1l2 {
 
 &pinctrl {
 	keys {
-		btn_0: button-0 {
+		pwm15_ir_m1: pwm15-ir-m1 {
 			rockchip,pins = <4 RK_PB3 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
 
 	leds {
-		led_0: led-0 {
+		power_led: power-led {
 			rockchip,pins = <3 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
@@ -328,19 +328,19 @@ pcie20x1_2_perstn_m0: pcie-2 {
 	};
 
 	regulators {
-		vcc_5v0_pwren_h: regulator-5v0-1 {
+		vcc_5v0_pwren_h: vcc-5v0-pwren-h {
 			rockchip,pins = <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
 
 	rtc {
-		rtc_int_l: rtc-0 {
+		rtc_int_l: rtc-int-l {
 			rockchip,pins = <0 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
 
 	usb {
-		usb_otg_pwren_h: regulator-5v0-0 {
+		usb_otg_pwren_h: usb-otg-pwren-h {
 			rockchip,pins = <0 RK_PD4 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
-- 
2.25.1

Re: [PATCH v3 0/3] arm64: dts: rockchip: Update Radxa E52C support

[Chukun Pan]

Hi,

> Changed from v3:
>   Add vcc_3v3_pmu label to vcc_3v3_s3

Are there any issues with this series of patches?

Thanks,
Chukun

Re: (subset) [PATCH v3 0/3] arm64: dts: rockchip: Update Radxa E52C support

[Heiko Stuebner]

On Mon, 01 Sep 2025 18:00:24 +0800, Chukun Pan wrote:
> Changed from v3:
>   Add vcc_3v3_pmu label to vcc_3v3_s3
> 
> Changed from v2:
>   Remove merged patches
>   Remove VCC_3V3_PMU for Radxa E52C (new)
>   Update pinctrl names for Radxa E52C (new)
>   Update commit message for disabling display subsystem
> 
> [...]

Applied, thanks!

[2/3] arm64: dts: rockchip: remove vcc_3v3_pmu regulator for Radxa E52C
      commit: 3edb9c95ffa60c029074804c39b35103a9fb4bfd
[3/3] arm64: dts: rockchip: update pinctrl names for Radxa E52C
      commit: cf311ff5e7b27c267c05279e26546fe74f46e5da

Best regards,
-- 
Heiko Stuebner <heiko@sntech.de>