Re: [PATCH v2 3/8] ARM: dts: imx6ulz: Adjust BSH SMM-M2 Wi-Fi and Bluetooth pin settings

[Frank Li]

On Thu, Nov 05, 2026 at 10:41:17AM +0800, Haoning Cheng wrote:
> From: Leonhard Hesse <leonhard.hesse@xxxxxxxx>
>
> Adjustment of wifi and bluetooth REG_ON pin settings.
> Tests have shown that minor changes in drive strength, slew rate
> and speed resulted in the best performance.

It is just GPIO, why strength, slew rate impact performace?

Frank

>
> Signed-off-by: Leonhard Hesse <leonhard.hesse@xxxxxxxx>
> Signed-off-by: Haoning Cheng <Haoning.CHENG@xxxxxxxxxxxx>
> ---
>  arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts b/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts
> index aac211a9f9eb..dabe17222f13 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts
> +++ b/arch/arm/boot/dts/nxp/imx/imx6ulz-bsh-smm-m2.dts
> @@ -125,7 +125,7 @@ MX6UL_PAD_UART3_TX_DATA__UART3_DCE_TX	0x1b0b1
>  			MX6UL_PAD_UART3_RX_DATA__UART3_DCE_RX	0x1b099
>  			MX6UL_PAD_UART3_RTS_B__UART3_DCE_RTS	0x1b0b1
>  			MX6UL_PAD_UART3_CTS_B__UART3_DCE_CTS	0x1b099
> -			MX6UL_PAD_GPIO1_IO01__GPIO1_IO01	0x79		/* BT_REG_ON */
> +			MX6UL_PAD_GPIO1_IO01__GPIO1_IO01	0x100b1		/* BT_REG_ON */
>  			MX6UL_PAD_SD1_CLK__GPIO2_IO17		0x100b1		/* BT_DEV_WAKE out */
>  			MX6UL_PAD_ENET2_TX_EN__GPIO2_IO13	0x1b0b0		/* BT_HOST_WAKE in */
>  		>;
> @@ -146,7 +146,7 @@ MX6UL_PAD_CSI_DATA00__USDHC2_DATA0	0x17059
>  			MX6UL_PAD_CSI_DATA01__USDHC2_DATA1	0x17059
>  			MX6UL_PAD_CSI_DATA02__USDHC2_DATA2	0x17059
>  			MX6UL_PAD_CSI_DATA03__USDHC2_DATA3	0x17059
> -			MX6UL_PAD_SD1_DATA3__GPIO2_IO21		0x79		/* WL_REG_ON */
> +			MX6UL_PAD_SD1_DATA3__GPIO2_IO21		0x3029		/* WL_REG_ON */
>  			MX6UL_PAD_UART2_CTS_B__GPIO1_IO22	0x100b1		/* WL_DEV_WAKE - WiFi_GPIO_4 - WiFi FW UART */
>  			MX6UL_PAD_UART1_CTS_B__GPIO1_IO18	0x1b0b1		/* WL_HOST_WAKE - WIFI_GPIO_0 - OOB IRQ */
>  			MX6UL_PAD_ENET1_RX_EN__OSC32K_32K_OUT	0x4001b031	/* OSC 32Khz wifi clk in */
>
> --
> 2.43.0
>
>