Re: [PATCH 6/9] arm64: dts: imx8ulp-evk: Enable LPUART6 for Bluetooth
From: Frank Li <hidden>
Date: 2026-07-15 15:17:50
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On Wed, Jul 15, 2026 at 08:33:07PM +0800, Peng Fan (OSS) wrote:
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From: Sherry Sun <redacted> 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 <redacted> Signed-off-by: Peng Fan <peng.fan@nxp.com> --- arch/arm64/boot/dts/freescale/imx8ulp-9x9-evk.dts | 17 +++++++++++++++++ arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 21 +++++++++++++++++++++ 2 files changed, 38 insertions(+)diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-9x9-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-9x9-evk.dts index af8f0d6087f71..71c66c58edc4d 100644 --- a/arch/arm64/boot/dts/freescale/imx8ulp-9x9-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx8ulp-9x9-evk.dts@@ -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>;diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts index 6a92c5ca9a412..66e99cd24040f 100644 --- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts@@ -167,6 +167,18 @@ &lpuart5 { status = "okay"; }; +&lpuart6 { + /* BT */ + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&pinctrl_lpuart6>; + pinctrl-1 = <&pinctrl_lpuart6>;
sleep is the same as default state, are you sure need both? Frank
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+ status = "okay"; + + bluetooth { + compatible = "nxp,88w8987-bt"; + }; +}; + &lpi2c7 { #address-cells = <1>; #size-cells = <0>;@@ -349,6 +361,15 @@ 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 --2.34.1