From 8940756346ec498727acce4dd3fb4659b1fd83d3 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Wed, 21 Jan 2026 19:13:46 +0800 Subject: [PATCH] arm64: dts: imx93-evk/qsb: add m2-pcm-level-shifter-hog to enable BT HFP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For i.MX93 11x11 EVK and 9x9 QSB boards, add the gpio-hog to enable the M.2 PCM pins level shifter connected between soc sai1 interface and M.2 PCM pins so that HFP feature can be supported. Since the HFP is only used at a later stage — after the BT firmware has been downloaded and the BT connection with the remote device has been established — both the pcal6524 expander and sai1 interface are already fully initialized and available by that time. Therefore, using a gpio-hog here will not introduce any probe ordering or dependency issues for the HFP use case. Signed-off-by: Sherry Sun Reviewed-by: Frank Li Reviewed-by: Peng Fan Signed-off-by: Frank Li --- arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts | 6 ++++++ arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts index 8dd5340e8141..acb160d3186c 100644 --- a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts @@ -356,6 +356,12 @@ pcal6524: gpio@22 { #interrupt-cells = <2>; interrupt-parent = <&gpio3>; interrupts = <27 IRQ_TYPE_LEVEL_LOW>; + + m2-pcm-level-shifter-hog { + gpio-hog; + gpios = <19 GPIO_ACTIVE_HIGH>; + output-high; + }; }; pmic@25 { diff --git a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts index 0852067eab2c..11e08673083b 100644 --- a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts +++ b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts @@ -349,6 +349,12 @@ mic-can-sel-hog { gpios = <17 GPIO_ACTIVE_HIGH>; output-low; }; + + m2-pcm-level-shifter-hog { + gpio-hog; + gpios = <19 GPIO_ACTIVE_HIGH>; + output-high; + }; }; pmic@25 {