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    Subject[PATCH 5.15 041/177] arm64: dts: rockchip: fix audio-supply for Rock Pi 4
    Date
    From: Alex Bee <knaerzche@gmail.com>

    [ Upstream commit 8240e87f16d17a9592c9d67857a3dcdbcb98f10d ]

    As stated in the schematics [1] and [2] P5 the APIO5 domain is supplied
    by RK808-D Buck4, which in our case vcc1v8_codec - i.e. a 1.8 V regulator.

    Currently only white noise comes from the ES8316's output, which - for
    whatever reason - came up only after the the correct switch from i2s0_8ch_bus
    to i2s0_2ch_bus for i2s0's pinctrl was done.

    Fix this by setting the correct regulator for audio-supply.

    [1] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi4_v13_sch_20181112.pdf
    [2] https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi_4c_v12_sch_20200620.pdf

    Fixes: 1b5715c602fd ("arm64: dts: rockchip: add ROCK Pi 4 DTS support")
    Signed-off-by: Alex Bee <knaerzche@gmail.com>
    Link: https://lore.kernel.org/r/20211027143726.165809-1-knaerzche@gmail.com
    Signed-off-by: Heiko Stuebner <heiko@sntech.de>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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 b28888ea9262e..100a769165ef9 100644
    --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
    +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
    @@ -457,7 +457,7 @@ &io_domains {
    status = "okay";

    bt656-supply = <&vcc_3v0>;
    - audio-supply = <&vcc_3v0>;
    + audio-supply = <&vcc1v8_codec>;
    sdmmc-supply = <&vcc_sdio>;
    gpio1830-supply = <&vcc_3v0>;
    };
    --
    2.33.0


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