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MT-149180: add basic ipc/extcon mechanism to send usb events from the stm through the kernel #41

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MT-149180: add basic ipc/extcon mechanism to send usb events from the stm through the kernel #41

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77d47dc
extcon: Add STM32 SPI IPC driver
Overdr0ne Jun 1, 2026
a564014
arm64: configs: Enable STM32 SPI IPC extcon driver
Overdr0ne Jun 1, 2026
f2093d1
arm64: dts: freescale: Add STM32 SPI IPC and extcon nodes
Overdr0ne Jun 1, 2026
4aec1db
extcon: Kconfig: select CRC8 and improve stm32-ipc help description
Overdr0ne Jun 3, 2026
ed4c861
extcon: stm32-ipc: remove unused GPIO header
Overdr0ne Jun 3, 2026
24dc94a
extcon: stm32-ipc: fallback to safe disconnected state error
Overdr0ne Jun 3, 2026
764a575
extcon: stm32-ipc: Use dev_dbg in threaded IRQ to avoid log flooding
Overdr0ne Jun 3, 2026
0c4f171
extcon: stm32-ipc: create per-device debugfs to avoid collisions
Overdr0ne Jun 3, 2026
887f157
extcon: stm32-ipc: implement CRC-8/length validation on SPI packets
Overdr0ne Jun 3, 2026
225b1c2
extcon: stm32-ipc: replace magic numbers with enum and defines
Overdr0ne Jun 3, 2026
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28 changes: 22 additions & 6 deletions arch/arm64/boot/dts/freescale/mt-connect.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -495,15 +495,29 @@
};

&ecspi2 {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi2>;
pinctrl-0 = <&pinctrl_ecspi2 &pinctrl_stm_ipc>;
cs-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
status = "okay";

spidev1: spi@0 {
stm_ipc: stm32-ipc@0 {
compatible = "multitracks,stm32-spi-ipc";
reg = <0>;
compatible = "rohm,dh2228fv";
spi-max-frequency = <500000>;
spi-max-frequency = <10000000>;
interrupt-parent = <&gpio2>;
interrupts = <11 IRQ_TYPE_EDGE_FALLING>;

usb1_connector: connector-usb1 {
compatible = "multitracks,stm32-usb-connector";
port-id = <0>;
};

usb2_connector: connector-usb2 {
compatible = "multitracks,stm32-usb-connector";
port-id = <1>;
};
};
};

Expand All @@ -520,6 +534,7 @@
};

&usbotg1 {
extcon = <&usb1_connector>;
hnp-disable;
srp-disable;
adp-disable;
Expand All @@ -533,6 +548,7 @@
};

&usbotg2 {
extcon = <&usb2_connector>;
hnp-disable;
srp-disable;
adp-disable;
Expand Down Expand Up @@ -710,7 +726,7 @@
>;
};

pinctrl_typec1: typec1grp {
pinctrl_stm_ipc: stmipcgrp {
fsl,pins = <
MX8MM_IOMUXC_SD1_STROBE_GPIO2_IO11 0x159
>;
Expand Down
1 change: 1 addition & 0 deletions arch/arm64/configs/mt_connect_defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -652,6 +652,7 @@ CONFIG_FSL_QIXIS=y
CONFIG_SOC_TI=y
CONFIG_EXTCON_PTN5150=m
CONFIG_EXTCON_USB_GPIO=y
CONFIG_EXTCON_STM32_SPI_IPC=y
CONFIG_IIO=y
CONFIG_FXLS8962AF_I2C=m
CONFIG_IIO_ST_ACCEL_3AXIS=m
Expand Down
9 changes: 9 additions & 0 deletions drivers/extcon/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -176,6 +176,15 @@ config EXTCON_USB_GPIO
Say Y here to enable GPIO based USB cable detection extcon support.
Used typically if GPIO is used for USB ID pin detection.

config EXTCON_STM32_SPI_IPC
tristate "STM32 SPI IPC and Virtual Extcon support"
depends on SPI
select CRC8
Comment on lines +179 to +182
help
Say Y here to enable the STM32 SPI IPC and Virtual Extcon driver,
which handles USB connection/cable event notifications reported
by an external STM32 co-processor over SPI.

config EXTCON_USBC_CROS_EC
tristate "ChromeOS Embedded Controller EXTCON support"
depends on CROS_EC
Expand Down
1 change: 1 addition & 0 deletions drivers/extcon/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -23,5 +23,6 @@ obj-$(CONFIG_EXTCON_QCOM_SPMI_MISC) += extcon-qcom-spmi-misc.o
obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o
obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o
obj-$(CONFIG_EXTCON_USB_GPIO) += extcon-usb-gpio.o
obj-$(CONFIG_EXTCON_STM32_SPI_IPC) += extcon-stm32-ipc.o
obj-$(CONFIG_EXTCON_USBC_CROS_EC) += extcon-usbc-cros-ec.o
obj-$(CONFIG_EXTCON_USBC_TUSB320) += extcon-usbc-tusb320.o
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