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/Documentation/devicetree/bindings/spi/
Dspi-gpio.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/spi/spi-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: SPI-GPIO devicetree bindings
10 - Rob Herring <robh@kernel.org>
13 This represents a group of 3-n GPIO lines used for bit-banged SPI on
14 dedicated GPIO lines.
17 - $ref: "/schemas/spi/spi-controller.yaml#"
21 const: spi-gpio
[all …]
/Documentation/devicetree/bindings/pinctrl/
Dmarvell,kirkwood-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,88f6180-pinctrl",
8 "marvell,88f6190-pinctrl", "marvell,88f6192-pinctrl",
9 "marvell,88f6281-pinctrl", "marvell,88f6282-pinctrl",
10 "marvell,98dx4122-pinctrl", "marvell,98dx1135-pinctrl"
11 - reg: register specifier of MPP registers
14 It also support the 88f6281-based variant in the 98dx412x Bobcat SoCs.
24 mpp0 0 gpio, nand(io2), spi(cs)
25 mpp1 1 gpo, nand(io3), spi(mosi)
28 mpp4 4 gpio, nand(io6), uart0(rxd), ptp(clk)
[all …]
Dmarvell,armada-370-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,88f6710-pinctrl"
8 - reg: register specifier of MPP registers
16 mpp0 0 gpio, uart0(rxd)
18 mpp2 2 gpio, i2c0(sck), uart0(txd)
19 mpp3 3 gpio, i2c0(sda), uart0(rxd)
20 mpp4 4 gpio, vdd(cpu-pd)
22 mpp6 6 gpio, ge0(txd0), sata0(prsnt), tdm(rst), audio(sdo)
24 mpp8 8 gpio, ge0(txd2), uart0(rts), tdm(drx), audio(bclk)
26 mpp10 10 gpio, ge0(txctl), uart0(cts), tdm(fsync), audio(sdi)
[all …]
Dmarvell,armada-375-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,88f6720-pinctrl"
8 - reg: register specifier of MPP registers
16 mpp0 0 gpio, dev(ad2), spi0(cs1), spi1(cs1)
17 mpp1 1 gpio, dev(ad3), spi0(mosi), spi1(mosi)
18 mpp2 2 gpio, dev(ad4), ptp(evreq), led(c0), audio(sdi)
19 mpp3 3 gpio, dev(ad5), ptp(trig), led(p3), audio(mclk)
20 mpp4 4 gpio, dev(ad6), spi0(miso), spi1(miso)
21 mpp5 5 gpio, dev(ad7), spi0(cs2), spi1(cs2)
22 mpp6 6 gpio, dev(ad0), led(p1), audio(lrclk)
[all …]
Dmarvell,dove-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,dove-pinctrl"
8 - clocks: (optional) phandle of pdma clock
9 - reg: register specifiers of MPP, MPP4, and PMU MPP registers
18 mpp0 0 gpio, pmu, uart2(rts), sdio0(cd), lcd0(pwm), pmu*
19 mpp1 1 gpio, pmu, uart2(cts), sdio0(wp), lcd1(pwm), pmu*
20 mpp2 2 gpio, pmu, uart2(txd), sdio0(buspwr), sata(prsnt),
22 mpp3 3 gpio, pmu, uart2(rxd), sdio0(ledctrl), sata(act),
23 uart1(cts), lcd-spi(cs1), pmu*
24 mpp4 4 gpio, pmu, uart3(rts), sdio1(cd), spi1(miso), pmu*
[all …]
Dmarvell,armada-39x-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,88f6920-pinctrl", "marvell,88f6925-pinctrl" or
8 "marvell,88f6928-pinctrl" depending on the specific variant of the
10 - reg: register specifier of MPP registers
18 mpp0 0 gpio, ua0(rxd)
19 mpp1 1 gpio, ua0(txd)
20 mpp2 2 gpio, i2c0(sck)
21 mpp3 3 gpio, i2c0(sda)
22 mpp4 4 gpio, ua1(txd), ua0(rts), smi(mdc)
23 mpp5 5 gpio, ua1(rxd), ua0(cts), smi(mdio)
[all …]
Dmarvell,armada-38x-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,88f6810-pinctrl", "marvell,88f6820-pinctrl" or
8 "marvell,88f6828-pinctrl" depending on the specific variant of the
10 - reg: register specifier of MPP registers
18 mpp0 0 gpio, ua0(rxd)
19 mpp1 1 gpio, ua0(txd)
20 mpp2 2 gpio, i2c0(sck)
21 mpp3 3 gpio, i2c0(sda)
22 mpp4 4 gpio, ge(mdc), ua1(txd), ua0(rts)
23 mpp5 5 gpio, ge(mdio), ua1(rxd), ua0(cts)
[all …]
Dmarvell,armada-xp-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,mv78230-pinctrl", "marvell,mv78260-pinctrl",
8 "marvell,mv78460-pinctrl"
9 - reg: register specifier of MPP registers
21 mpp0 0 gpio, ge0(txclkout), lcd(d0)
22 mpp1 1 gpio, ge0(txd0), lcd(d1)
23 mpp2 2 gpio, ge0(txd1), lcd(d2)
24 mpp3 3 gpio, ge0(txd2), lcd(d3)
25 mpp4 4 gpio, ge0(txd3), lcd(d4)
26 mpp5 5 gpio, ge0(txctl), lcd(d5)
[all …]
Dmarvell,armada-98dx3236-pinctrl.txt3 Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
7 - compatible: "marvell,98dx3236-pinctrl" or "marvell,98dx4251-pinctrl"
8 - reg: register specifier of MPP registers
14 mpp0 0 gpo, spi0(mosi), dev(ad8)
15 mpp1 1 gpio, spi0(miso), dev(ad9)
17 mpp3 3 gpio, spi0(cs0), dev(ad11)
18 mpp4 4 gpio, spi0(cs1), smi(mdc), dev(cs0)
19 mpp5 5 gpio, pex(rsto), sd0(cmd), dev(bootcs)
21 mpp7 7 gpio, sd0(d0), dev(ale0)
22 mpp8 8 gpio, sd0(d1), dev(ale1)
[all …]
/Documentation/devicetree/bindings/arm/marvell/
Dcp110-system-controller.txt6 giving access to numerous features: clocks, pin-muxing and many other
11 - compatible: must be: "syscon", "simple-mfd";
12 - reg: register area of the CP110 system controller
18 -------
23 - a set of core clocks
24 - a set of gatable clocks
28 - The first cell must be 0 or 1. 0 for the core clocks and 1 for the
30 - The second cell identifies the particular core clock or gatable
34 - Core clocks
35 - 0 0 APLL
[all …]
Dap806-system-controller.txt6 giving access to numerous features: clocks, pin-muxing and many other
11 - compatible: must be: "syscon", "simple-mfd";
12 - reg: register area of the AP806 system controller
18 -------
24 - 0: reference clock of CPU cluster 0
25 - 1: reference clock of CPU cluster 1
26 - 2: fixed PLL at 1200 Mhz
27 - 3: MSS clock, derived from the fixed PLL
31 - compatible: must be one of:
32 * "marvell,ap806-clock"
[all …]
/Documentation/driver-api/
Dspi.rst7 often in the range of 1-20 MHz), a "Master Out, Slave In" (MOSI) data
9 duplex protocol; for each bit shifted out the MOSI line (one per clock)
12 additional chipselect line is usually active-low (nCS); four signals are
24 hardware, which may be as simple as a set of GPIO pins or as complex as
33 board-specific initialization code. A :c:type:`struct spi_driver
46 .. kernel-doc:: include/linux/spi/spi.h
49 .. kernel-doc:: drivers/spi/spi.c
52 .. kernel-doc:: drivers/spi/spi.c
/Documentation/devicetree/bindings/leds/irled/
Dspi-ir-led.txt4 The IR LED switch is connected to the MOSI line of the SPI device and the data
8 - compatible: should be "ir-spi-led".
11 - duty-cycle: 8 bit balue that represents the percentage of one period
13 - led-active-low: boolean value that specifies whether the output is
15 - power-supply: specifies the power source. It can either be a regulator
16 or a gpio which enables a regulator, i.e. a regulator-fixed as
18 Documentation/devicetree/bindings/regulator/fixed-regulator.yaml
23 compatible = "ir-spi-led";
25 spi-max-frequency = <5000000>;
26 power-supply = <&vdd_led>;
[all …]
/Documentation/driver-api/gpio/
Ddrivers-on-gpio.rst2 Subsystem drivers using GPIO
5 Note that standard kernel drivers exist for common GPIO tasks and will provide
6 the right in-kernel and userspace APIs/ABIs for the job, and that these
10 - leds-gpio: drivers/leds/leds-gpio.c will handle LEDs connected to GPIO
13 - ledtrig-gpio: drivers/leds/trigger/ledtrig-gpio.c will provide a LED trigger,
14 i.e. a LED will turn on/off in response to a GPIO line going high or low
15 (and that LED may in turn use the leds-gpio as per above).
17 - gpio-keys: drivers/input/keyboard/gpio_keys.c is used when your GPIO line
20 - gpio-keys-polled: drivers/input/keyboard/gpio_keys_polled.c is used when your
21 GPIO line cannot generate interrupts, so it needs to be periodically polled
[all …]
/Documentation/spi/
Dspi-summary.rst5 02-Feb-2012
8 ------------
15 and parallel data lines with "Master Out, Slave In" (MOSI) or "Master In,
17 clocking modes through which data is exchanged; mode-0 and mode-3 are most
32 - SPI may be used for request/response style device protocols, as with
35 - It may also be used to stream data in either direction (half duplex),
38 - Some devices may use eight bit words. Others may use different word
39 lengths, such as streams of 12-bit or 20-bit digital samples.
41 - Words are usually sent with their most significant bit (MSB) first,
44 - Sometimes SPI is used to daisy-chain devices, like shift registers.
[all …]