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/openbmc/u-boot/doc/device-tree-bindings/adc/
H A Dst,stm32-adc.txt1 STMicroelectronics STM32 ADC device
3 STM32 ADC is a successive approximation analog-to-digital converter.
4 It has several multiplexed input channels. Conversions can be performed
5 in single, continuous, scan or discontinuous mode. Result of the ADC is
6 stored in a left-aligned or right-aligned 32-bit data register.
10 voltage goes beyond the user-defined, higher or lower thresholds.
12 Each STM32 ADC block can have up to 3 ADC instances.
16 - regular conversion can be done in sequence, running in background
17 - injected conversions have higher priority, and so have the ability to
21 Contents of a stm32 adc root node:
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/openbmc/linux/Documentation/devicetree/bindings/iio/adc/
H A Dst,stm32-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/st,stm32-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 ADC
10 STM32 ADC is a successive approximation analog-to-digital converter.
11 It has several multiplexed input channels. Conversions can be performed
12 in single, continuous, scan or discontinuous mode. Result of the ADC is
13 stored in a left-aligned or right-aligned 32-bit data register.
17 voltage goes beyond the user-defined, higher or lower thresholds.
[all …]
H A Dst,stm32-dfsdm-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/st,stm32-dfsdm-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 DFSDM ADC device driver
10 - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
11 - Olivier Moysan <olivier.moysan@foss.st.com>
14 STM32 DFSDM ADC is a sigma delta analog-to-digital converter dedicated to
17 - Sigma delta modulators (motor control, metering...)
18 - PDM microphones (audio digital microphone)
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H A Dti,am3359-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/ti,am3359-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: TI AM3359 ADC
10 - Miquel Raynal <miquel.raynal@bootlin.com>
15 - enum:
16 - ti,am3359-adc
17 - ti,am4372-adc
18 - items:
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H A Dcosmic,10001-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/cosmic,10001-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Cosmic Circuits CC-10001 ADC
10 - Jonathan Cameron <jic23@kernel.org>
13 Cosmic Circuits 10001 10-bit ADC device.
17 const: cosmic,10001-adc
22 adc-reserved-channels:
25 Bitmask of reserved channels, i.e. channels that cannot be
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H A Datmel,sama9260-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/atmel,sama9260-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: AT91 sama9260 and similar Analog to Digital Converter (ADC)
10 - Alexandre Belloni <alexandre.belloni@bootlin.com>
15 - atmel,at91sam9260-adc
16 - atmel,at91sam9rl-adc
17 - atmel,at91sam9g45-adc
18 - atmel,at91sam9x5-adc
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H A Dadi,ad7124.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/iio/adc/adi,ad7124.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Analog Devices AD7124 ADC device driver
11 - Stefan Popa <stefan.popa@analog.com>
14 Bindings for the Analog Devices AD7124 ADC device. Datasheet can be
16 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7124-8.pdf
21 - adi,ad7124-4
22 - adi,ad7124-8
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H A Daspeed,ast2600-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/aspeed,ast2600-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ADC that forms part of an ASPEED server management processor.
10 - Billy Tsai <billy_tsai@aspeedtech.com>
13 • 10-bits resolution for 16 voltage channels.
15 channels.
16 • Channel scanning can be non-continuous.
17 • Programmable ADC clock frequency.
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/openbmc/u-boot/include/
H A Dadc.h1 /* SPDX-License-Identifier: GPL-2.0+ */
10 /* ADC_CHANNEL() - ADC channel bit mask, to select only required channels */
13 /* The last possible selected channel with 32-bit mask */
17 * adc_data_format: define the ADC output data format, can be useful when
19 * - ADC_DATA_FORMAT_BIN - binary offset
20 * - ADC_DATA_FORMAT_2S - two's complement
31 * struct adc_channel - structure to hold channel conversion data.
32 * Useful to keep the result of a multi-channel conversion output.
34 * @id - channel id
35 * @data - channel conversion data
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/openbmc/u-boot/drivers/adc/
H A DKconfig1 config ADC config
2 bool "Enable ADC drivers using Driver Model"
4 This enables ADC API for drivers, which allows driving ADC features
5 by single and multi-channel methods for:
6 - start/stop/get data for conversion of a single-channel selected by
7 a number or multi-channels selected by a bitmask
8 - get data mask (ADC resolution)
9 ADC reference Voltage supply options:
10 - methods for get Vdd/Vss reference Voltage values with polarity
11 - support supply's phandle with auto-enable
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H A Dstm32-adc.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
6 * Originally based on the Linux kernel v4.18 drivers/iio/adc/stm32-adc.c.
10 #include <adc.h>
13 #include "stm32-adc-core.h"
15 /* STM32H7 - Registers for each ADC instance */
26 /* STM32H7_ADC_ISR - bit fields */
31 /* STM32H7_ADC_CR - bit fields */
43 /* STM32H7_ADC_SQR1 - bit fields */
46 /* BOOST bit must be set on STM32H7 when ADC clock is above 20MHz */
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/openbmc/linux/drivers/iio/adc/
H A Dmcp320x.c1 // SPDX-License-Identifier: GPL-2.0-only
8 * Driver for following ADC chips from Microchip Technology's:
14 * ------------
20 * ------------
23 * ------------
65 const struct iio_chan_spec *channels; member
72 * struct mcp320x - Microchip SPI ADC instance
74 * @msg: SPI message to select a channel and receive a value from the ADC
80 * @chip_info: ADC properties
81 * @tx_buf: buffer for @transfer[0] (not used on single-channel converters)
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H A Dstm32-adc.c1 // SPDX-License-Identifier: GPL-2.0
3 * This file is part of STM32 ADC driver
5 * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
12 #include <linux/dma-mapping.h>
16 #include <linux/iio/timer/stm32-lptim-trigger.h>
17 #include <linux/iio/timer/stm32-timer-trigger.h>
26 #include <linux/nvmem-consumer.h>
31 #include "stm32-adc-core.h"
36 /* BOOST bit must be set on STM32H7 when ADC clock is above 20MHz */
39 #define STM32_ADC_CH_MAX 20 /* max number of channels */
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H A Dqcom-pm8xxx-xoadc.c1 // SPDX-License-Identifier: GPL-2.0-only
7 * specific-purpose and general purpose ADC converters and channels.
13 #include <linux/iio/adc/qcom-vadc-common.h>
27 * Qualcomm tree. Their kernel has two out-of-tree drivers for the ADC:
28 * drivers/misc/pmic8058-xoadc.c
29 * drivers/hwmon/pm8xxx-adc.c
57 /* Proper ADC registers */
99 * On a later ADC the decimation factors are defined as
123 * Physical channels which MUST exist on all PM variants in order to provide
155 * struct xoadc_channel - encodes channel properties and defaults
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H A Dti-adc084s021.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Driver for Texas Instruments' ADC084S021 ADC chip.
31 __be16 channels[4]; member
39 __be16 rx_buf[5]; /* First 16-bits are trash */
68 * adc084s021_adc_conversion() - Read an ADC channel and return its value.
70 * @adc: The ADC SPI data.
73 static int adc084s021_adc_conversion(struct adc084s021 *adc, __be16 *data) in adc084s021_adc_conversion() argument
75 int n_words = (adc->spi_trans.len >> 1) - 1; /* Discard first word */ in adc084s021_adc_conversion()
79 ret = spi_sync(adc->spi, &adc->message); in adc084s021_adc_conversion()
84 *(data + i) = adc->rx_buf[i + 1]; in adc084s021_adc_conversion()
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H A Dti-adc0832.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * ADC0831/ADC0832/ADC0834/ADC0838 8-bit ADC driver
7 * Datasheet: https://www.ti.com/lit/ds/symlink/adc0832-n.pdf
33 * Max size needed: 16x 1 byte ADC data + 8 bytes timestamp
34 * May be shorter if not all channels are enabled subject
120 static int adc0831_adc_conversion(struct adc0832 *adc) in adc0831_adc_conversion() argument
122 struct spi_device *spi = adc->spi; in adc0831_adc_conversion()
125 ret = spi_read(spi, &adc->rx_buf, 2); in adc0831_adc_conversion()
130 * Skip TRI-STATE and a leading zero in adc0831_adc_conversion()
132 return (adc->rx_buf[0] << 2 & 0xff) | (adc->rx_buf[1] >> 6); in adc0831_adc_conversion()
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H A Dti_am335x_adc.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * TI ADC MFD driver
5 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
26 #include <linux/dma-mapping.h>
45 int channels; member
54 static unsigned int tiadc_readl(struct tiadc_device *adc, unsigned int reg) in tiadc_readl() argument
56 return readl(adc->mfd_tscadc->tscadc_base + reg); in tiadc_readl()
59 static void tiadc_writel(struct tiadc_device *adc, unsigned int reg, in tiadc_writel() argument
62 writel(val, adc->mfd_tscadc->tscadc_base + reg); in tiadc_writel()
69 step_en = ((1 << adc_dev->channels) - 1); in get_adc_step_mask()
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/openbmc/linux/Documentation/devicetree/bindings/input/touchscreen/
H A Dresistive-adc-touch.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/input/touchscreen/resistive-adc-touch.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic resistive touchscreen ADC
10 - Oleksij Rempel <o.rempel@pengutronix.de>
13 Generic ADC based resistive touchscreen controller
14 The device must be connected to an ADC device that provides channels for
18 - $ref: touchscreen.yaml#
22 const: resistive-adc-touch
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/openbmc/linux/drivers/hwmon/
H A Dadcxx.c1 // SPDX-License-Identifier: GPL-2.0-or-later
11 * ADC<bb><c>S<sss>, where
13 * * c is the number of channels (1, 2, 4, 8)
18 * http://www.national.com/ds/DC/ADC<bb><c>S<sss>.pdf
32 #include <linux/hwmon-sysfs.h>
42 u32 channels; member
52 struct adcxx *adc = spi_get_drvdata(spi); in adcxx_show() local
58 if (mutex_lock_interruptible(&adc->lock)) in adcxx_show()
59 return -ERESTARTSYS; in adcxx_show()
61 if (adc->channels == 1) { in adcxx_show()
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/openbmc/linux/drivers/thermal/qcom/
H A Dqcom-spmi-adc-tm5.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
12 #include <linux/iio/adc/qcom-vadc-common.h>
26 * Thermal monitoring block consists of 8 (ADC_TM5_NUM_CHANNELS) channels. Each
27 * channel is programmed to use one of ADC channels for voltage comparison.
28 * Voltages are programmed using ADC codes, so we have to convert temp to
29 * voltage and then to ADC code value.
31 * Configuration of TM channels must match configuration of corresponding ADC
32 * channels.
178 * struct adc_tm5_channel - ADC Thermal Monitoring channel data.
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/openbmc/linux/Documentation/devicetree/bindings/input/
H A Dadc-joystick.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 # Copyright 2019-2020 Artur Rojek
4 ---
5 $id: http://devicetree.org/schemas/input/adc-joystick.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: ADC attached joystick
11 - Artur Rojek <contact@artur-rojek.eu>
14 Bindings for joystick devices connected to ADC controllers supporting
18 - $ref: input.yaml#
22 const: adc-joystick
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/openbmc/linux/Documentation/devicetree/bindings/thermal/
H A Dqcom-spmi-adc-tm5.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/thermal/qcom-spmi-adc-tm5.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm's SPMI PMIC ADC Thermal Monitoring
9 - Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
14 - qcom,spmi-adc-tm5
15 - qcom,spmi-adc-tm5-gen2
16 - qcom,adc-tm7 # Incomplete / subject to change
24 "#thermal-sensor-cells":
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/openbmc/linux/arch/arm/boot/dts/
H A Dcros-adc-thermistors.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
4 * children of the IIO based ADC.
12 &adc {
15 pullup-uv = <1800000>;
16 pullup-ohm = <47000>;
17 pulldown-ohm = <0>;
18 io-channels = <&adc 3>;
22 pullup-uv = <1800000>;
23 pullup-ohm = <47000>;
24 pulldown-ohm = <0>;
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/openbmc/u-boot/test/dm/
H A Dadc.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Tests for the driver model ADC API
10 #include <adc.h>
19 #include <sandbox-adc.h>
27 ut_assertok(uclass_get_device_by_name(UCLASS_ADC, "adc", &dev)); in dm_test_adc_bind()
28 ut_asserteq_str(SANDBOX_ADC_DEVNAME, dev->name); in dm_test_adc_bind()
31 ut_asserteq((1 << SANDBOX_ADC_CHANNELS) - 1, channel_mask); in dm_test_adc_bind()
41 ut_assertok(uclass_get_device_by_name(UCLASS_ADC, "adc", &dev)); in dm_test_adc_wrong_channel_selection()
42 ut_asserteq(-EINVAL, adc_start_channel(dev, SANDBOX_ADC_CHANNELS)); in dm_test_adc_wrong_channel_selection()
54 ut_assertok(uclass_get_device_by_name(UCLASS_ADC, "adc", &dev)); in dm_test_adc_supply()
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/openbmc/linux/Documentation/devicetree/bindings/hwmon/
H A Diio-hwmon.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/hwmon/iio-hwmon.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ADC-attached Hardware Sensor
10 - Jonathan Cameron <jic23@kernel.org>
13 Bindings for hardware monitoring devices connected to ADC controllers
18 const: iio-hwmon
20 io-channels:
24 List of phandles to ADC channels to read the monitoring values
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