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arm64: dts: imx8ulp-evk: Enable LPUART6 for Bluetooth

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Enable lpuart6 with RTS/CTS flow control on the i.MX 8ULP EVK board
and add an NXP 88W8987 Bluetooth companion node to pair the UART
transport with the wireless chip.

i.MX8ULP 9X9 EVK use different lpuart6 pins which used for M.2 bluetooth,
also use the sai6 instead of sai5 for PCM interface on M.2, so need to
update the pin setting in dts.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Sherry Sun 2026-07-20 22:12:14 +08:00 committed by Frank Li
parent 011242de59
commit fdcdcb8dd4
2 changed files with 37 additions and 0 deletions
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17
arch/arm64/boot/dts/freescale/imx8ulp-9x9-evk.dts
View File

@ -75,6 +75,23 @@ MX8ULP_PAD_PTE20__USB1_OC 0x10003
>;
};
&pinctrl_lpuart6 {
fsl,pins = <
MX8ULP_PAD_PTF18__LPUART6_TX 0x3
MX8ULP_PAD_PTF19__LPUART6_RX 0x3
MX8ULP_PAD_PTF16__LPUART6_CTS_B 0x3
MX8ULP_PAD_PTF17__LPUART6_RTS_B 0x3
>;
};
&lpspi5 { /* conflict with lpuart6 PAD_PTF16-19 */
status = "disabled";
};
&sai5 {
status = "disabled";
};
&sai6 {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&pinctrl_sai6>;

20
arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
View File

@ -167,6 +167,17 @@ &lpuart5 {
status = "okay";
};
&lpuart6 {
/* BT */
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lpuart6>;
status = "okay";
bluetooth {
compatible = "nxp,88w8987-bt";
};
};
&lpi2c7 {
#address-cells = <1>;
#size-cells = <0>;
@ -349,6 +360,15 @@ MX8ULP_PAD_PTF15__LPUART5_RX 0x3
>;
};
pinctrl_lpuart6: lpuart6grp {
fsl,pins = <
MX8ULP_PAD_PTE10__LPUART6_TX 0x3
MX8ULP_PAD_PTE11__LPUART6_RX 0x3
MX8ULP_PAD_PTE9__LPUART6_RTS_B 0x3
MX8ULP_PAD_PTE8__LPUART6_CTS_B 0x3
>;
};
pinctrl_lpi2c7: lpi2c7grp {
fsl,pins = <
MX8ULP_PAD_PTE12__LPI2C7_SCL 0x20