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/freebsd/sys/contrib/device-tree/Bindings/i2c/
H A Di2c-arb-gpio-challenge.txt1 GPIO-based I2C Arbitration Using a Challenge & Response Mechanism
6 In many cases using GPIOs to arbitrate is not needed and a design can use
7 the standard I2C multi-master rules. Using GPIOs is generally useful in
20 All masters on the bus have a 'bus claim' line which is an output that the
21 others can see. These are all active low with pull-ups enabled. We'll
24 - OUR_CLAIM: output from us signaling to other hosts that we want the bus
25 - THEIR_CLAIMS: output from others signaling that they want the bus
31 Let's say we want to claim the bus. We:
38 5. If not, back off, release the claim and wait for a few more milliseconds.
43 - compatible: i2c-arb-gpio-challenge
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/freebsd/sys/contrib/device-tree/src/arm/samsung/
H A Dexynos5250-snow-common.dtsi1 // SPDX-License-Identifier: GPL-2.0
8 #include <dt-bindings/gpio/gpio.h>
9 #include <dt-bindings/clock/maxim,max77686.h>
10 #include <dt-bindings/interrupt-controller/irq.h>
11 #include <dt-bindings/input/input.h>
12 #include <dt-bindings/sound/samsung-i2
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/freebsd/sys/contrib/device-tree/src/arm/nxp/imx/
H A Dimx6q-cm-fx6.dts6 * This file is dual-licensed: you can use it either under the terms
38 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
44 /dts-v1/;
45 #include <dt-bindings/gpio/gpio.h>
46 #include <dt-bindings/sound/fsl-imx-audmux.h>
50 model = "CompuLab CM-FX6";
51 compatible = "compulab,cm-fx6", "fsl,imx6q";
59 compatible = "gpio-leds";
61 heartbeat-led {
63 gpios = <&gpio2 31 0>;
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