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

[Quentin Schulz]

Hi Naoki,

On 10/27/25 1:52 AM, 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>

I came to the same conclusion in 
https://lore.kernel.org/linux-rockchip/20251127-rock-pi-4-io-domain-apio5-v1-1-9cb92793f734@cherry.de/ 
(thanks Jonas for letting me know, should have checked before sending 
the revert :/), so

Reviewed-by: Quentin Schulz <quentin.schulz at cherry.de>

+Cc Heinrich who reported[1] a bug in U-Boot this patch fixes so they 
can give their Tested-by/Reviewed-by if they want to.

[1] 
https://lore.kernel.org/u-boot/e7b7b905-4a6c-4342-b1a5-0ad32a5837cf@gmx.de/

Thanks,
Quentin