Re: [PATCH v2 3/3] arm64: dts: amlogic: t7: khadas-vim4: Enable Bluetooth

Neil Armstrong
2026-04-20T08:47:30Z

On 4/16/26 10:54, Ronald Claveau wrote:
> Enable UART C on the Khadas VIM4 board and attach the BCM43438
> compatible Bluetooth controller to it. The node configures the RTS/CTS
> hardware flow control, the associated pinmux, the power supplies (vddao_3v3
> and vddao_1v8), the 32 kHz LPO clock shared with the wifi32k fixed
> clock, and the GPIO lines used for host wakeup, device wakeup and
> shutdown.
>
> Remove clocks and clock-names for UART A, as they are defined in DTSI.

This should be a separate patch.

Neil

>
> Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
> ---
> .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts | 21 +++++++++++++++++++--
> 1 file changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
> index 69d6118ba57e7..8ea7ae609fbd5 100644
> --- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
> +++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
> @@ -250,6 +250,23 @@ &sd_emmc_c {
>
> &uart_a {
> status = "okay";
> - clocks = <&xtal>, <&xtal>, <&xtal>;
> - clock-names = "xtal", "pclk", "baud";
> +};
> +
> +&uart_c {
> + status = "okay";
> + pinctrl-0 = <&uart_c_pins>;
> + pinctrl-names = "default";
> + uart-has-rtscts;
> +
> + bluetooth {
> + compatible = "brcm,bcm43438-bt";
> + shutdown-gpios = <&gpio GPIOX_17 GPIO_ACTIVE_HIGH>;
> + host-wakeup-gpios = <&gpio GPIOX_18 GPIO_ACTIVE_HIGH>;
> + device-wakeup-gpios = <&gpio GPIOX_19 GPIO_ACTIVE_HIGH>;
> + max-speed = <3000000>;
> + clocks = <&wifi32k>;
> + clock-names = "lpo";
> + vbat-supply = <&vddao_3v3>;
> + vddio-supply = <&vddao_1v8>;
> + };
> };
>