[PATCH] arm64: dts: rockchip: Fix audio-supply for ROCK Pi 4

[Heinrich Schuchardt]

On 10/27/25 01:52, FUKAUMI Naoki wrote:
> This reverts commit 8240e87f16d17 ("arm64: dts: rockchip: fix
> audio-supply for Rock Pi 4").
> 
> Fix the APIO5_VDD power supply to vcc_3v0 as per the schematics[1][2]
> [3][4][5].
> 
> This fixes the SPI-NOR flash probe failure when the blue LED is on[6],
> and the garbled serial console output on Linux.
> 
> The ES8316 headphone and microphone are confirmed to work correctly
> after this fix.
> 
> [1] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4a/ROCK_4A_V1.52_SCH.pdf p.14
> [2] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4ap/radxa_rock_4ap_v1730_schematic.pdf p.14
> [3] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4b/ROCK_4B_v1.52_SCH.pdf p.14
> [4] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/4bp/radxa_rock_4bp_v1730_schematic.pdf p.14
> [5] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/ROCK-4-SE-V1.53-SCH.pdf p.14
> 
> [6]
> => led blue:status off
> => sf probe
> SF: Detected w25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
> => led blue:status on
> => sf probe
> jedec_spi_nor flash at 0: unrecognized JEDEC id bytes: ff, ff, ff
> Failed to initialize SPI flash at 1:0 (error -2)
> 
> Fixes: 7ebfd4f6b52a6 ("arm64: dts: rockchip: add LED for ROCK Pi 4A/B/C/A+/B+")
> Fixes: 8240e87f16d17 ("arm64: dts: rockchip: fix audio-supply for Rock Pi 4")
> Signed-off-by: FUKAUMI Naoki <naoki at radxa.com>
> ---
>   arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
> index 046dbe3290178..fda7ea87e4efc 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
> @@ -516,7 +516,7 @@ &i2s2 {
>   };
>   
>   &io_domains {
> -	audio-supply = <&vcca1v8_codec>;
> +	audio-supply = <&vcc_3v0>;
>   	bt656-supply = <&vcc_3v0>;
>   	gpio1830-supply = <&vcc_3v0>;
>   	sdmmc-supply = <&vcc_sdio>;


U-Boot uses the same device-tree as Linux. I applied the change in 
U-Boot and it fixes the following problems in U-Boot for me:

* The serial console is not usable after the supply voltages are set.
* Early initialization of the video output fails.

Tested-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>