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/kernel/linux/linux-5.10/Documentation/devicetree/bindings/gpio/
Draspberrypi,firmware-gpio.txt1 Raspberry Pi GPIO expander
3 The Raspberry Pi 3 GPIO expander is controlled by the VC4 firmware. The
5 GPIO lines on the expander.
7 The Raspberry Pi GPIO expander node must be a child node of the Raspberry Pi
Dgpio-adnp.txt1 Avionic Design N-bit GPIO expander bindings
13 The GPIO expander can optionally be used as an interrupt controller, in
Dgpio-pcf857x.txt44 The I/O expander can detect input state changes, and thus optionally act as
45 an interrupt controller. When the expander interrupt line is connected all the
58 Example: PCF8575 I/O expander node
Dgpio-moxtet.txt1 Turris Mox Moxtet GPIO expander via Moxtet bus
Dgpio-xra1403.txt3 The XRA1403 is an 16-bit GPIO expander with an SPI interface. Features available:
/kernel/linux/linux-5.10/Documentation/devicetree/bindings/pinctrl/
Dpinctrl-sx150x.txt1 SEMTECH SX150x GPIO expander bindings
32 - semtech,probe-reset: Will trigger a reset of the GPIO expander on probe,
35 The GPIO expander can optionally be used as an interrupt controller, in
54 i2c0gpio-expander@20{
/kernel/linux/linux-5.10/arch/arm/boot/dts/
Ddove-sbc-a510.dts46 * SBC-A510 comprises a PCA9555 I2C GPIO expander its GPIO lines connected to
104 * USB port 0 can be powered and monitored by I2C GPIO expander:
122 * - GPIO expander, NXP PCA9555, 0x20
142 /* NXP PCA9555 GPIO expander */
170 * SDIO0 is connected to a MMC/SD/SDIO socket, I2C GPIO expander has
Dimx6qdl-pico-dwarf.dtsi29 io-expander@25 {
Dimx6qdl-pico-nymph.dtsi28 io-expander@25 {
Dvf610-zii-scu4-aib.dts498 gpio5: io-expander@20 {
505 gpio6: io-expander@22 {
556 gpio9: io-expander@20 {
577 gpio7: io-expander@23 {
Darmada-388-clearfog.dtsi115 * PCA9655 GPIO expander, up to 1MHz clock.
133 expander0: gpio-expander@20 {
Dimx7d-pico-dwarf.dts60 pca9554: io-expander@25 {
Darmada-388-helios4.dts154 * PCA9655 GPIO expander, up to 1MHz clock.
160 expander0: gpio-expander@20 {
Dvf610-zii-dev-rev-b.dts326 gpio5: io-expander@20 {
334 gpio6: io-expander@22 {
Dkirkwood-l-50.dts65 gpio2: gpio-expander@20{
79 gpio3: gpio-expander@21{
Dvf610-zii-dev-rev-c.dts277 gpio5: io-expander@18 {
325 gpio7: io-expander@22 {
Darmada-370-seagate-nas-4bay.dts38 /* I2C GPIO expander (PCA9554A) */
Darmada-388-clearfog.dts58 * PCA9655 GPIO expander:
/kernel/linux/linux-5.10/arch/arm/mach-davinci/
DKconfig141 based GPIO expander on that board. This option selected in this
165 prompt "Select peripherals connected to expander on UI board"
170 based GPIO expander on that card. This option selected in this
177 to TCA6416 expander on DA850/OMAP-L138/AM18x EVM UI card
/kernel/linux/linux-5.10/Documentation/hwmon/
Draspberrypi-hwmon.rst9 * Raspberry Pi 3 B (via GPIO on port expander)
/kernel/linux/linux-5.10/Documentation/devicetree/bindings/i2c/
Di2c-arb.txt17 with a NXP pca8574 GPIO expander attached.
/kernel/linux/linux-5.10/Documentation/scsi/
Dlibsas.rst21 * Expander management and exporting expander control
313 - events marked E (expander) if it wants the SAS layer
423 In each expander directory in sysfs, there is a file called
436 2. Open the expander's SMP portal sysfs file in RW mode.
458 expander, and gives expander information, including routing
461 The SMP portal gives you complete control of the expander,
/kernel/linux/linux-5.10/Documentation/devicetree/bindings/leds/
Dleds-pca9532.txt3 The PCA9532 family is SMBus I/O expander optimized for dimming LEDs.
/kernel/linux/linux-5.10/drivers/pinctrl/
DKconfig185 tristate "Microchip MCP23xxx I/O expander"
237 bool "Semtech SX150x I2C GPIO expander pinctrl driver"
268 tristate "STMicroelectronics STMFX GPIO expander pinctrl driver"
276 GPIO expander.
/kernel/linux/linux-5.10/Documentation/leds/
Dleds-lp3944.rst23 DIM modes; it could even be used as a gpio expander but this driver assumes it

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