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/linux-6.12.1/Documentation/devicetree/bindings/i2c/
Dallwinner,sun6i-a31-p2wi.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/i2c/allwinner,sun6i-a31-p2wi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Allwinner A31 P2WI (Push/Pull 2 Wires Interface)
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
14 - $ref: /schemas/i2c/i2c-controller.yaml#
18 const: allwinner,sun6i-a31-p2wi
32 clock-frequency:
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/linux-6.12.1/arch/arm/boot/dts/allwinner/
Dsun6i-a31.dtsi4 * Maxime Ripard <maxime.ripard@free-electrons.com>
6 * This file is dual-licensed: you can use it either under the terms
45 #include <dt-bindings/interrupt-controller/arm-gic.h>
46 #include <dt-bindings/thermal/thermal.h>
48 #include <dt-bindings/clock/sun6i-a31-ccu.h>
49 #include <dt-bindings/clock/sun6i-rtc.h>
50 #include <dt-bindings/reset/sun6i-a31-ccu.h>
53 interrupt-parent = <&gic>;
54 #address-cells = <1>;
55 #size-cells = <1>;
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Dsun6i-a31-mele-a1000g-quad.dts4 * This file is dual-licensed: you can use it either under the terms
43 /dts-v1/;
44 #include "sun6i-a31.dtsi"
45 #include "sunxi-common-regulators.dtsi"
47 #include <dt-bindings/gpio/gpio.h>
51 compatible = "mele,a1000g-quad", "allwinner,sun6i-a31";
58 stdout-path = "serial0:115200n8";
62 compatible = "gpio-leds";
67 default-state = "on";
73 cpu-supply = <&reg_dcdc3>;
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Dsun6i-a31-m9.dts4 * This file is dual-licensed: you can use it either under the terms
43 /dts-v1/;
44 #include "sun6i-a31.dtsi"
45 #include "sunxi-common-regulators.dtsi"
47 #include <dt-bindings/gpio/gpio.h>
51 compatible = "mele,m9", "allwinner,sun6i-a31";
58 stdout-path = "serial0:115200n8";
62 compatible = "gpio-leds";
67 default-state = "on";
73 cpu-supply = <&reg_dcdc3>;
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Dsun6i-a31-hummingbird.dts4 * Maxime Ripard <maxime.ripard@free-electrons.com>
6 * This file is dual-licensed: you can use it either under the terms
45 /dts-v1/;
46 #include "sun6i-a31.dtsi"
47 #include "sunxi-common-regulators.dtsi"
49 #include <dt-bindings/gpio/gpio.h>
52 model = "Merrii A31 Hummingbird";
53 compatible = "merrii,a31-hummingbird", "allwinner,sun6i-a31";
62 stdout-path = "serial0:115200n8";
65 hdmi-connector {
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/linux-6.12.1/drivers/i2c/busses/
Di2c-sun6i-p2wi.c2 * P2WI (Push-Pull Two Wire Interface) bus driver.
4 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
10 * The P2WI controller looks like an SMBus controller which only supports byte
13 * - it supports only one target device, and thus drop the address field
14 * - it adds a parity bit every 8bits of data
15 * - only one read access is required to read a byte (instead of a write
17 * - there's no Ack bit after each byte transfer
34 /* P2WI registers */
66 #define P2WI_DLEN_DATA_LENGTH(v) ((v - 1) & 0x7)
84 struct p2wi { struct
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