| /openbmc/linux/Documentation/devicetree/bindings/i2c/ |
| H A D | i2c-arb-gpio-challenge.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/i2c/i2c-arb-gpio-challenge.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: GPIO-based I2C Arbitration Using a Challenge & Response Mechanism
10 - Doug Anderson <dianders@chromium.org>
11 - Peter Rosin <peda@axentia.se>
17 In many cases using GPIOs to arbitrate is not needed and a design can use the
18 standard I2C multi-master rules. Using GPIOs is generally useful in the case
29 All masters on the bus have a 'bus claim' line which is an output that the
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| /openbmc/linux/drivers/i2c/muxes/ |
| H A D | i2c-arb-gpio-challenge.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * GPIO-based I2C Arbitration Using a Challenge & Response Mechanism
12 #include <linux/i2c-mux.h>
19 * struct i2c_arbitrator_data - Driver data for I2C arbitrator
21 * @our_gpio: GPIO descriptor we'll use to claim.
22 * @their_gpio: GPIO descriptor that the other side will use to claim.
24 * @wait_retry_us: we'll attempt another claim after this many microseconds.
38 * i2c_arbitrator_select - claim the I2C bus
40 * Use the GPIO-based signalling protocol; return -EBUSY if we fail.
47 /* Start a round of trying to claim the bus */ in i2c_arbitrator_select()
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| /openbmc/u-boot/drivers/i2c/muxes/ |
| H A D | i2c-arb-gpio-challenge.c | 1 // SPDX-License-Identifier: GPL-2.0+
29 debug("%s: %s\n", __func__, mux->name); in i2c_arbitrator_deselect()
30 ret = dm_gpio_set_value(&priv->ap_claim, 0); in i2c_arbitrator_deselect()
31 udelay(priv->slew_delay_us); in i2c_arbitrator_deselect()
43 debug("%s: %s\n", __func__, mux->name); in i2c_arbitrator_select()
44 /* Start a round of trying to claim the bus */ in i2c_arbitrator_select()
50 /* Indicate that we want to claim the bus */ in i2c_arbitrator_select()
51 ret = dm_gpio_set_value(&priv->ap_claim, 1); in i2c_arbitrator_select()
54 udelay(priv->slew_delay_us); in i2c_arbitrator_select()
58 while (get_timer(start_retry) < priv->wait_retry_ms) { in i2c_arbitrator_select()
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| /openbmc/u-boot/doc/ |
| H A D | README.i2c | 4 While I2C supports multi-master buses this is difficult to get right.
6 Clock-stretching and the arbitrary time that an I2C transaction can take
8 When one or more masters can be reset independently part-way through a
11 U-Boot provides a scheme based on two 'claim' GPIOs, one driven by the
18 Since U-Boot runs on the AP, the terminology used is 'our' claim GPIO,
19 meaning the AP's, and 'their' claim GPIO, meaning the EC's. This terminology
23 i2c-arb-gpio-challenge for the implementation.
26 each have a 'bus claim' line, which is an output that the other can see.
28 - AP_CLAIM: output from AP, signalling to the EC that the AP wants the bus
29 - EC_CLAIM: output from EC, signalling to the AP that the EC wants the bus
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| /openbmc/linux/arch/arm/boot/dts/samsung/ |
| H A D | exynos5250-snow-common.dtsi | 1 // 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-i2s.h>
30 stdout-path = "serial3:115200n8";
33 gpio-keys {
34 compatible = "gpio-keys";
35 pinctrl-names = "default";
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| /openbmc/linux/arch/arm/boot/dts/allwinner/ |
| H A D | sun8i-r16-bananapi-m2m.dts | 2 * Copyright (c) 2017 Free Electrons <maxime.ripard@free-electrons.com>
4 * This file is dual-licensed: you can use it either under the terms
37 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
43 /dts-v1/;
44 #include "sun8i-a33.dtsi"
46 #include <dt-bindings/gpio/gpio.h>
50 compatible = "sinovoip,bananapi-m2m", "allwinner,sun8i-a33";
61 stdout-path = "serial0:115200n8";
65 compatible = "gpio-leds";
67 led-0 {
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| H A D | sun8i-v40-bananapi-m2-berry.dts | 4 * This file is dual-licensed: you can use it either under the terms
37 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
43 /dts-v1/;
44 #include "sun8i-r40.dtsi"
45 #include "sun8i-r40-cpu-opp.dtsi"
47 #include <dt-bindings/gpio/gpio.h>
51 compatible = "sinovoip,bpi-m2-berry", "allwinner,sun8i-r40";
59 stdout-path = "serial0:115200n8";
63 compatible = "hdmi-connector";
68 remote-endpoint = <&hdmi_out_con>;
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| H A D | sun8i-r40-bananapi-m2-ultra.dts | 2 * Copyright (C) 2017 Chen-Yu Tsai <wens@csie.org>
5 * 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 "sun8i-r40.dtsi"
46 #include "sun8i-r40-cpu-opp.dtsi"
48 #include <dt-bindings/gpio/gpio.h>
51 model = "Banana Pi BPI-M2-Ultra";
52 compatible = "sinovoip,bpi-m2-ultra", "allwinner,sun8i-r40";
60 stdout-path = "serial0:115200n8";
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| /openbmc/u-boot/arch/arm/dts/ |
| H A D | sun8i-r16-bananapi-m2m.dts | 2 * Copyright (c) 2017 Free Electrons <maxime.ripard@free-electrons.com>
4 * This file is dual-licensed: you can use it either under the terms
37 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
43 /dts-v1/;
44 #include "sun8i-a33.dtsi"
46 #include <dt-bindings/gpio/gpio.h>
50 compatible = "sinovoip,bananapi-m2m", "allwinner,sun8i-a33";
61 stdout-path = "serial0:115200n8";
65 compatible = "gpio-leds";
68 label = "bpi-m2m:blue:usr";
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| H A D | exynos5250-snow.dts | 12 /dts-v1/;
13 #include <dt-bindings/gpio/gpio.h>
14 #include <dt-bindings/interrupt-controller/irq.h>
15 #include <dt-bindings/input/input.h>
51 stdout-path = "serial3:115200n8";
59 samsung,bl1-offset = <0x1400>;
60 samsung,bl2-offset = <0x3400>;
61 u-boot-memory = "/memory";
62 u-boot-offset = <0x3e00000 0x100000>;
67 #address-cells = <1>;
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| /openbmc/qemu/hw/misc/macio/ |
| H A D | macio.c | 4 * Copyright (c) 2005-2007 Fabrice Bellard
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
32 #include "hw/qdev-properties.h"
44 * The mac-io has two interfaces to the ESCC. One is called "escc-legacy",
47 * The magic below creates memory aliases to spawn the escc-legacy device
48 * purely by rerouting the respective registers to our escc region. This
56 SysBusDevice *sbd = SYS_BUS_DEVICE(&s->escc); in macio_escc_legacy_setup()
72 memory_region_init(escc_legacy, OBJECT(s), "escc-legacy", 256); in macio_escc_legacy_setup()
75 memory_region_init_alias(port, OBJECT(s), "escc-legacy-port", in macio_escc_legacy_setup()
81 memory_region_add_subregion(&s->bar, 0x12000, escc_legacy); in macio_escc_legacy_setup()
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| /openbmc/linux/drivers/pinctrl/qcom/ |
| H A D | pinctrl-msm.c | 1 // SPDX-License-Identifier: GPL-2.0-only
24 #include <linux/pinctrl/pinconf-generic.h>
32 #include "../pinctrl-utils.h"
34 #include "pinctrl-msm.h"
41 * struct msm_pinctrl - state for a pinctrl-msm device
89 return readl(pctrl->regs[g->tile] + g->name##_reg); \
94 writel(val, pctrl->regs[g->tile] + g->name##_reg); \
106 u32 val = g->intr_ack_high ? BIT(g->intr_status_bit) : 0; in MSM_ACCESSOR()
115 return pctrl->soc->ngroups; in msm_get_groups_count()
123 return pctrl->soc->groups[group].grp.name; in msm_get_group_name()
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| /openbmc/linux/drivers/i2c/busses/ |
| H A D | i2c-s3c2410.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* linux/drivers/i2c/busses/i2c-s3c2410.c
34 #include <linux/platform_data/i2c-s3c2410.h>
116 struct gpio_desc *gpios[2]; member
124 .name = "s3c2410-i2c",
127 .name = "s3c2440-i2c",
130 .name = "s3c2440-hdmiphy-i2c",
140 { .compatible = "samsung,s3c2410-i2c", .data = (void *)0 },
141 { .compatible = "samsung,s3c2440-i2c", .data = (void *)QUIRK_S3C2440 },
142 { .compatible = "samsung,s3c2440-hdmiphy-i2c",
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| /openbmc/linux/ |
| H A D | opengrok0.0.log | 1 2024-12-28 20:09:05.996-0600 FINEST t1171 PendingFileCompleter.doRename: Moved pending as file: '/opengrok/data/xref/openbmc/linux/drivers/staging/media/av7110/video-continue.rst.gz'
2 2024-12-28 20:09:05.942-0600 FINEST t1149 PendingFileCompleter.doRename: Moved pending as file: '/opengrok/data/xref/openbmc/u-boot/arch/sh/config.mk.gz'
3 2024-12-2
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