diff options
| author | Franz Schnyder <franz.schnyder@toradex.com> | 2026-03-26 15:37:06 +0100 |
|---|---|---|
| committer | Frank Li <Frank.Li@nxp.com> | 2026-05-05 15:13:20 -0400 |
| commit | a05af625aa2c8e3f837c393df8abe11a6b84078d (patch) | |
| tree | ec97291bfec841fa6ef6f47e6bb59700c44811b3 | |
| parent | 104a391bb6ff4cbb2bc0fafd34bc1bc06150f355 (diff) | |
arm64: dts: freescale: imx95-toradex-smarc: Use gpio-hog for WIFI_UART_EN
On the Toradex SMARC iMX95, the WiFi UART signals are shared with the
JTAG. The WIFI_UART_EN signal is used to select between these
two functions. A GPIO hog is used to select the UART function by
default. This DT file is going to be used by both Linux and the boot
firmware, and the boot firmware will configure the GPIO hog way before
the Linux kernel is booted, therefore there is no actual race condition
between the Linux kernel BT UART driver and GPIO hog probe.
Configure WIFI_UART_EN as a gpio-hog driven high.
Signed-off-by: Franz Schnyder <franz.schnyder@toradex.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
| -rw-r--r-- | arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi index a90edefc5197..8eef26eb0f87 100644 --- a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi +++ b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi @@ -451,6 +451,13 @@ "", "", "SMARC_SDIO_WP"; + + wifi-uart-en-hog { + gpio-hog; + gpios = <12 GPIO_ACTIVE_HIGH>; + line-name = "WIFI_UART_EN"; + output-high; + }; }; embedded-controller@28 { |