![Greg Kroah-Hartman](/assets/img/avatar_default.png)
We have a couple of changes that apply to large sets of drivers, so I have grouped those to keep this short. There are a few late breaking fixes in here that can wait for the merge window. dt yaml conversions ------------------- * adi,ad7768-1 * adi,ad7949 * aspeed,ast2400 * cosmic,10001-adc * dlg,da9150-gpadc * fsl,imx25-gcq * fsl,imx7d-adc * fsl,vf610 * holt,hi8435 * marvell,berlin2-adc * motorola,cpcap-adc * nuvoton,nau7802 * nuvoton,npcm750-adc * nxp,lpc1850-adc * nxp,lpc3220 * sprd,sc2720-adc * st,stmpe-adc * ti,adc12138 * ti,ads1015 * ti,ads7950 * ti,twl4030-madc Features -------- * adxrs290 - Add triggered buffer support and expose data ready signal as a possible trigger. Includes updating bindings. - Add debugfs hooks for register access. * mlx90632 - Add a clear user interface to override the measured ambient temperature. * vl53l0x - Add IRQ support including dt bindings. Cleanups and minor fixes ------------------------ (groups) Replace mlock with local lock: * adf4350 * exynos-adc * fls-imx25-gcq * stm32-dac devm use to simplify probe error handling and remove functions. * adis16201 * adis16203 * adis16209 * adis16240 * adis16136 * adis16260 * adis16400 * adis16460 * adis16480 * adis library - drop unused adis_setup_buffer_and_trigger() of_match_ptr removal and incorrect ACPI binding removal of_match_ptr() rarely makes sense in an IIO driver as space saving is trivial and it breaks ACPI PRP0001 based instantiation. Mostly this series is about removing examples that get copied into new drivers. * ad2s1200 * ad5272 * ad5446 * ad5592r * ad5593r * ad5703 * ak8974 * ak8975 * ams-iaq-core * as3935 * atlas-sensor * ds1803 * hdc100x * htu21 * icp10100 * lmp91000 * pulsedlight * max30102 * max5432 * max5481 * mcp4018 * mcp4131 * mcp4531 * mcp4725 * ms5611 * ms5637 * si7020 * sgp30 * ti-dac082s085 * ti-dac5571 * tmp007 * tsys01 * vz89x * zpa2326 kernel-doc fixes * iio-core * ad7303 * ad7947 * adis16080 * adis16400 * iio_dummy_evgen * sgp30 Fixes for buffer alignment when passed to iio_push_to_buffers_with_timestamp() This is a long running effort. There are a few more drivers to come. * inv_mpu6050 * itg3200 * si1145 * st_lsm6dsx * ti-adc0832 * ti-adc12138 (not driver focused) * MAINTAINERS - Consolidate Analog Device IIO entries whilst removing Beniamin Bia. - Remove Hartmut Knaack as a listed IIO maintainer as he hasn't been active for a long time and people are getting intermitted bounces. * Add __printf() markings to a few functions that were missing them. * drop some rotted documentation from staging. * rework buffer sysfs file creation (precursor to multiple buffer support) (individual drivers) * ad5592r - Fix use of true for IIO_SHARED_BY_TYPE - Tidy up locking and indentation. * ad9467 - Improve error message on chip-id missmatch. - Use more appropriate error value if chip-id not recognised. * adis-library - Simplify burst mode handling. * adxrs290 - Make sure to switch device to standby mode during remove. * as73211 - Increase measurement timeout as seems some devices are slower. * bma180 - Fix use of true fo IIO_SHARED_BY_TYPE * exynos_adc - Update binding to require second interrut with touch screen. - Update binding to not require syscon on S5Pv210 * hmc5843 - Fix use of true for IIO_SHARED_BY_TYPE * inv_mpu6050 - Use regmap_noinc_read() for fifo reading. * palmas_gpadc - Use module_platform_driver() to remove boilerplate. * meson-saradc - style consistency fixes * rockchip_saradc - Allow compile testing with !ARM. * st_lsm6dsx - Changing scaling factor to use IIO_VAL_INT_PLUS_NANO to improve precision. - Fix an issue with unchecked return value. * stm32-adc - Fix a missing return introduced in dev_err_probe() patch earlier in cycle. * sx9310 - Prefer async mode for probe as paticularly slow startup. * vcnl4000 - Add missing interrupt property to dt binding. -----BEGIN PGP SIGNATURE----- iQJFBAABCAAvFiEEbilms4eEBlKRJoGxVIU0mcT0FogFAl9o+P4RHGppYzIzQGtl cm5lbC5vcmcACgkQVIU0mcT0FohJyRAAjEa6RhQkoJMn4QRp5gNj+BhWoYeM4yeL kjOTI9WIfi5acuJiQK/bscqPjVoa9xkp33Za6gRYLFHtxiY0M1c7IKxK7jdDIxyT ak5JkmhbklhpAqAaXtGhngBQ/pmctunefjfJbV6ltlZP4W+7aHhGgVEW74Qiagn0 +FuT3g23pcaCelm7uf1hynxkPUSvH0HlYPUdCptuYhE1YeFSsaCxSVl8DxIK0a52 MC/rVl4Psjn01mTtVTcwD/JlcO2LnoGC3kJThYguvY52mDqNZBYCseUKwB9ribAT AUj7X9rxbAsdQAoN/RF0umD6hxoTnEePf0B29NfdXM/6sn/nhMzWMpVPEPRPRN3B /g+WDBPCdOKs5mdyHgfSKhJko0p4jQ5dhGFbzBVA75Uq0yxxRrdXLI2D4rdBjUmF 6MXgAqaaAGRMq7qg3t3Kt9scR5J0CoPTY7oQvcetu/ZItFmaLEP4zM6wpYp1YXQg 4GnUKFmwSAb1/Ah4x4XWKkgtvAgJ0RjfebTifa0u/kqi4ZBjacdP7dd4ttEY/3pH Zg7OQuMZCF70tDkksSkdAWXEdTJuCZtzaCTdck3NS7yZv0d/MYq2aqDqmON1GbEU 18yTcGQYGvCJgUq2IlMOpFmlzCzA32+FS5/d2VIiL9xPtS0/weEmIJqY7ONvkQ+A VQq0c2u9Xck= =yrII -----END PGP SIGNATURE----- Merge tag 'iio-for-5.10b-take2' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: Second set of features and cleanups for IIO in 5.10 We have a couple of changes that apply to large sets of drivers, so I have grouped those to keep this short. There are a few late breaking fixes in here that can wait for the merge window. dt yaml conversions ------------------- * adi,ad7768-1 * adi,ad7949 * aspeed,ast2400 * cosmic,10001-adc * dlg,da9150-gpadc * fsl,imx25-gcq * fsl,imx7d-adc * fsl,vf610 * holt,hi8435 * marvell,berlin2-adc * motorola,cpcap-adc * nuvoton,nau7802 * nuvoton,npcm750-adc * nxp,lpc1850-adc * nxp,lpc3220 * sprd,sc2720-adc * st,stmpe-adc * ti,adc12138 * ti,ads1015 * ti,ads7950 * ti,twl4030-madc Features -------- * adxrs290 - Add triggered buffer support and expose data ready signal as a possible trigger. Includes updating bindings. - Add debugfs hooks for register access. * mlx90632 - Add a clear user interface to override the measured ambient temperature. * vl53l0x - Add IRQ support including dt bindings. Cleanups and minor fixes ------------------------ (groups) Replace mlock with local lock: * adf4350 * exynos-adc * fls-imx25-gcq * stm32-dac devm use to simplify probe error handling and remove functions. * adis16201 * adis16203 * adis16209 * adis16240 * adis16136 * adis16260 * adis16400 * adis16460 * adis16480 * adis library - drop unused adis_setup_buffer_and_trigger() of_match_ptr removal and incorrect ACPI binding removal of_match_ptr() rarely makes sense in an IIO driver as space saving is trivial and it breaks ACPI PRP0001 based instantiation. Mostly this series is about removing examples that get copied into new drivers. * ad2s1200 * ad5272 * ad5446 * ad5592r * ad5593r * ad5703 * ak8974 * ak8975 * ams-iaq-core * as3935 * atlas-sensor * ds1803 * hdc100x * htu21 * icp10100 * lmp91000 * pulsedlight * max30102 * max5432 * max5481 * mcp4018 * mcp4131 * mcp4531 * mcp4725 * ms5611 * ms5637 * si7020 * sgp30 * ti-dac082s085 * ti-dac5571 * tmp007 * tsys01 * vz89x * zpa2326 kernel-doc fixes * iio-core * ad7303 * ad7947 * adis16080 * adis16400 * iio_dummy_evgen * sgp30 Fixes for buffer alignment when passed to iio_push_to_buffers_with_timestamp() This is a long running effort. There are a few more drivers to come. * inv_mpu6050 * itg3200 * si1145 * st_lsm6dsx * ti-adc0832 * ti-adc12138 (not driver focused) * MAINTAINERS - Consolidate Analog Device IIO entries whilst removing Beniamin Bia. - Remove Hartmut Knaack as a listed IIO maintainer as he hasn't been active for a long time and people are getting intermitted bounces. * Add __printf() markings to a few functions that were missing them. * drop some rotted documentation from staging. * rework buffer sysfs file creation (precursor to multiple buffer support) (individual drivers) * ad5592r - Fix use of true for IIO_SHARED_BY_TYPE - Tidy up locking and indentation. * ad9467 - Improve error message on chip-id missmatch. - Use more appropriate error value if chip-id not recognised. * adis-library - Simplify burst mode handling. * adxrs290 - Make sure to switch device to standby mode during remove. * as73211 - Increase measurement timeout as seems some devices are slower. * bma180 - Fix use of true fo IIO_SHARED_BY_TYPE * exynos_adc - Update binding to require second interrut with touch screen. - Update binding to not require syscon on S5Pv210 * hmc5843 - Fix use of true for IIO_SHARED_BY_TYPE * inv_mpu6050 - Use regmap_noinc_read() for fifo reading. * palmas_gpadc - Use module_platform_driver() to remove boilerplate. * meson-saradc - style consistency fixes * rockchip_saradc - Allow compile testing with !ARM. * st_lsm6dsx - Changing scaling factor to use IIO_VAL_INT_PLUS_NANO to improve precision. - Fix an issue with unchecked return value. * stm32-adc - Fix a missing return introduced in dev_err_probe() patch earlier in cycle. * sx9310 - Prefer async mode for probe as paticularly slow startup. * vcnl4000 - Add missing interrupt property to dt binding. * tag 'iio-for-5.10b-take2' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (126 commits) dt-bindings: iio: vishay,vcnl4000: add interrupts property iio:imu:inv_mpu6050: Use regmap_noinc_read for fifo reads. iio:imu:inv_mpu6050 Fix dma and ts alignment and data leak issues. iio:adc:ti-adc12138 Fix alignment issue with timestamp iio:adc:ti-adc0832 Fix alignment issue with timestamp iio:imu:st_lsm6dsx Fix alignment and data leak issues iio:light:si1145: Fix timestamp alignment and prevent data leak. iio:gyro:itg3200: Fix timestamp alignment and prevent data leak. iio:imu:st_lsm6dsx: check st_lsm6dsx_shub_read_output return iio: adc: exynos_adc: Replace indio_dev->mlock with own device lock dt-bindings:iio:adc:holt,hi8435 yaml conversion dt-bindings:iio:adc:adi,ad7768-1 yaml conversion dt-bindings:iio:adc:adi,ad7949 yaml conversion dt-bindings:iio:adc:dlg,da9150-gpadc yaml conversion dt-bindings:iio:adc:motorola,cpcap-adc yaml conversion dt-bindings:iio:adc:nxp,lpc3220-adc yaml conversion dt-bindings:iio:adc:nxp,lpc1850-adc yaml conversion dt-bindings:iio:adc:fsl,imx25-gcq yaml conversion dt-bindings:iio:adc:fsl,imx7d-adc yaml conversion dt-bindings:iio:adc:ti,ads1015 yaml conversion ...
637 lines
16 KiB
C
637 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* max30102.c - Support for MAX30102 heart rate and pulse oximeter sensor
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*
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* Copyright (C) 2017 Matt Ranostay <matt.ranostay@konsulko.com>
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*
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* Support for MAX30105 optical particle sensor
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* Copyright (C) 2017 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
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*
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* 7-bit I2C chip address: 0x57
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* TODO: proximity power saving feature
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/irq.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/mod_devicetable.h>
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#include <linux/regmap.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/kfifo_buf.h>
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#define MAX30102_REGMAP_NAME "max30102_regmap"
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#define MAX30102_DRV_NAME "max30102"
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#define MAX30102_PART_NUMBER 0x15
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enum max30102_chip_id {
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max30102,
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max30105,
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};
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enum max3012_led_idx {
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MAX30102_LED_RED,
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MAX30102_LED_IR,
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MAX30105_LED_GREEN,
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};
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#define MAX30102_REG_INT_STATUS 0x00
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#define MAX30102_REG_INT_STATUS_PWR_RDY BIT(0)
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#define MAX30102_REG_INT_STATUS_PROX_INT BIT(4)
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#define MAX30102_REG_INT_STATUS_ALC_OVF BIT(5)
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#define MAX30102_REG_INT_STATUS_PPG_RDY BIT(6)
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#define MAX30102_REG_INT_STATUS_FIFO_RDY BIT(7)
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#define MAX30102_REG_INT_ENABLE 0x02
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#define MAX30102_REG_INT_ENABLE_PROX_INT_EN BIT(4)
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#define MAX30102_REG_INT_ENABLE_ALC_OVF_EN BIT(5)
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#define MAX30102_REG_INT_ENABLE_PPG_EN BIT(6)
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#define MAX30102_REG_INT_ENABLE_FIFO_EN BIT(7)
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#define MAX30102_REG_INT_ENABLE_MASK 0xf0
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#define MAX30102_REG_INT_ENABLE_MASK_SHIFT 4
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#define MAX30102_REG_FIFO_WR_PTR 0x04
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#define MAX30102_REG_FIFO_OVR_CTR 0x05
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#define MAX30102_REG_FIFO_RD_PTR 0x06
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#define MAX30102_REG_FIFO_DATA 0x07
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#define MAX30102_REG_FIFO_DATA_BYTES 3
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#define MAX30102_REG_FIFO_CONFIG 0x08
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#define MAX30102_REG_FIFO_CONFIG_AVG_4SAMPLES BIT(1)
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#define MAX30102_REG_FIFO_CONFIG_AVG_SHIFT 5
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#define MAX30102_REG_FIFO_CONFIG_AFULL BIT(0)
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#define MAX30102_REG_MODE_CONFIG 0x09
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#define MAX30102_REG_MODE_CONFIG_MODE_NONE 0x00
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#define MAX30102_REG_MODE_CONFIG_MODE_HR 0x02 /* red LED */
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#define MAX30102_REG_MODE_CONFIG_MODE_HR_SPO2 0x03 /* red + IR LED */
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#define MAX30102_REG_MODE_CONFIG_MODE_MULTI 0x07 /* multi-LED mode */
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#define MAX30102_REG_MODE_CONFIG_MODE_MASK GENMASK(2, 0)
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#define MAX30102_REG_MODE_CONFIG_PWR BIT(7)
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#define MAX30102_REG_MODE_CONTROL_SLOT21 0x11 /* multi-LED control */
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#define MAX30102_REG_MODE_CONTROL_SLOT43 0x12
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#define MAX30102_REG_MODE_CONTROL_SLOT_MASK (GENMASK(6, 4) | GENMASK(2, 0))
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#define MAX30102_REG_MODE_CONTROL_SLOT_SHIFT 4
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#define MAX30102_REG_SPO2_CONFIG 0x0a
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#define MAX30102_REG_SPO2_CONFIG_PULSE_411_US 0x03
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#define MAX30102_REG_SPO2_CONFIG_SR_400HZ 0x03
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#define MAX30102_REG_SPO2_CONFIG_SR_MASK 0x07
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#define MAX30102_REG_SPO2_CONFIG_SR_MASK_SHIFT 2
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#define MAX30102_REG_SPO2_CONFIG_ADC_4096_STEPS BIT(0)
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#define MAX30102_REG_SPO2_CONFIG_ADC_MASK_SHIFT 5
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#define MAX30102_REG_RED_LED_CONFIG 0x0c
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#define MAX30102_REG_IR_LED_CONFIG 0x0d
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#define MAX30105_REG_GREEN_LED_CONFIG 0x0e
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#define MAX30102_REG_TEMP_CONFIG 0x21
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#define MAX30102_REG_TEMP_CONFIG_TEMP_EN BIT(0)
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#define MAX30102_REG_TEMP_INTEGER 0x1f
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#define MAX30102_REG_TEMP_FRACTION 0x20
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#define MAX30102_REG_REV_ID 0xfe
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#define MAX30102_REG_PART_ID 0xff
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struct max30102_data {
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struct i2c_client *client;
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struct iio_dev *indio_dev;
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struct mutex lock;
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struct regmap *regmap;
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enum max30102_chip_id chip_id;
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u8 buffer[12];
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__be32 processed_buffer[3]; /* 3 x 18-bit (padded to 32-bits) */
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};
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static const struct regmap_config max30102_regmap_config = {
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.name = MAX30102_REGMAP_NAME,
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const unsigned long max30102_scan_masks[] = {
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BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR),
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0
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};
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static const unsigned long max30105_scan_masks[] = {
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BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR),
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BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR) |
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BIT(MAX30105_LED_GREEN),
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0
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};
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#define MAX30102_INTENSITY_CHANNEL(_si, _mod) { \
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.type = IIO_INTENSITY, \
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.channel2 = _mod, \
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.modified = 1, \
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.scan_index = _si, \
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.scan_type = { \
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.sign = 'u', \
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.shift = 8, \
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.realbits = 18, \
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.storagebits = 32, \
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.endianness = IIO_BE, \
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}, \
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}
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static const struct iio_chan_spec max30102_channels[] = {
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MAX30102_INTENSITY_CHANNEL(MAX30102_LED_RED, IIO_MOD_LIGHT_RED),
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MAX30102_INTENSITY_CHANNEL(MAX30102_LED_IR, IIO_MOD_LIGHT_IR),
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{
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.type = IIO_TEMP,
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.info_mask_separate =
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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.scan_index = -1,
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},
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};
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static const struct iio_chan_spec max30105_channels[] = {
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MAX30102_INTENSITY_CHANNEL(MAX30102_LED_RED, IIO_MOD_LIGHT_RED),
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MAX30102_INTENSITY_CHANNEL(MAX30102_LED_IR, IIO_MOD_LIGHT_IR),
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MAX30102_INTENSITY_CHANNEL(MAX30105_LED_GREEN, IIO_MOD_LIGHT_GREEN),
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{
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.type = IIO_TEMP,
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.info_mask_separate =
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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.scan_index = -1,
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},
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};
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static int max30102_set_power(struct max30102_data *data, bool en)
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{
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return regmap_update_bits(data->regmap, MAX30102_REG_MODE_CONFIG,
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MAX30102_REG_MODE_CONFIG_PWR,
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en ? 0 : MAX30102_REG_MODE_CONFIG_PWR);
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}
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static int max30102_set_powermode(struct max30102_data *data, u8 mode, bool en)
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{
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u8 reg = mode;
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if (!en)
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reg |= MAX30102_REG_MODE_CONFIG_PWR;
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return regmap_update_bits(data->regmap, MAX30102_REG_MODE_CONFIG,
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MAX30102_REG_MODE_CONFIG_PWR |
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MAX30102_REG_MODE_CONFIG_MODE_MASK, reg);
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}
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#define MAX30102_MODE_CONTROL_LED_SLOTS(slot2, slot1) \
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((slot2 << MAX30102_REG_MODE_CONTROL_SLOT_SHIFT) | slot1)
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static int max30102_buffer_postenable(struct iio_dev *indio_dev)
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{
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struct max30102_data *data = iio_priv(indio_dev);
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int ret;
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u8 reg;
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switch (*indio_dev->active_scan_mask) {
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case BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR):
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reg = MAX30102_REG_MODE_CONFIG_MODE_HR_SPO2;
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break;
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case BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR) |
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BIT(MAX30105_LED_GREEN):
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ret = regmap_update_bits(data->regmap,
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MAX30102_REG_MODE_CONTROL_SLOT21,
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MAX30102_REG_MODE_CONTROL_SLOT_MASK,
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MAX30102_MODE_CONTROL_LED_SLOTS(2, 1));
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if (ret)
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return ret;
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ret = regmap_update_bits(data->regmap,
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MAX30102_REG_MODE_CONTROL_SLOT43,
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MAX30102_REG_MODE_CONTROL_SLOT_MASK,
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MAX30102_MODE_CONTROL_LED_SLOTS(0, 3));
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if (ret)
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return ret;
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reg = MAX30102_REG_MODE_CONFIG_MODE_MULTI;
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break;
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default:
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return -EINVAL;
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}
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return max30102_set_powermode(data, reg, true);
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}
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static int max30102_buffer_predisable(struct iio_dev *indio_dev)
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{
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struct max30102_data *data = iio_priv(indio_dev);
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return max30102_set_powermode(data, MAX30102_REG_MODE_CONFIG_MODE_NONE,
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false);
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}
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static const struct iio_buffer_setup_ops max30102_buffer_setup_ops = {
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.postenable = max30102_buffer_postenable,
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.predisable = max30102_buffer_predisable,
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};
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static inline int max30102_fifo_count(struct max30102_data *data)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(data->regmap, MAX30102_REG_INT_STATUS, &val);
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if (ret)
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return ret;
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/* FIFO has one sample slot left */
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if (val & MAX30102_REG_INT_STATUS_FIFO_RDY)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define MAX30102_COPY_DATA(i) \
|
|
memcpy(&data->processed_buffer[(i)], \
|
|
&buffer[(i) * MAX30102_REG_FIFO_DATA_BYTES], \
|
|
MAX30102_REG_FIFO_DATA_BYTES)
|
|
|
|
static int max30102_read_measurement(struct max30102_data *data,
|
|
unsigned int measurements)
|
|
{
|
|
int ret;
|
|
u8 *buffer = (u8 *) &data->buffer;
|
|
|
|
ret = i2c_smbus_read_i2c_block_data(data->client,
|
|
MAX30102_REG_FIFO_DATA,
|
|
measurements *
|
|
MAX30102_REG_FIFO_DATA_BYTES,
|
|
buffer);
|
|
|
|
switch (measurements) {
|
|
case 3:
|
|
MAX30102_COPY_DATA(2);
|
|
fallthrough;
|
|
case 2:
|
|
MAX30102_COPY_DATA(1);
|
|
fallthrough;
|
|
case 1:
|
|
MAX30102_COPY_DATA(0);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return (ret == measurements * MAX30102_REG_FIFO_DATA_BYTES) ?
|
|
0 : -EINVAL;
|
|
}
|
|
|
|
static irqreturn_t max30102_interrupt_handler(int irq, void *private)
|
|
{
|
|
struct iio_dev *indio_dev = private;
|
|
struct max30102_data *data = iio_priv(indio_dev);
|
|
unsigned int measurements = bitmap_weight(indio_dev->active_scan_mask,
|
|
indio_dev->masklength);
|
|
int ret, cnt = 0;
|
|
|
|
mutex_lock(&data->lock);
|
|
|
|
while (cnt || (cnt = max30102_fifo_count(data)) > 0) {
|
|
ret = max30102_read_measurement(data, measurements);
|
|
if (ret)
|
|
break;
|
|
|
|
iio_push_to_buffers(data->indio_dev, data->processed_buffer);
|
|
cnt--;
|
|
}
|
|
|
|
mutex_unlock(&data->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int max30102_get_current_idx(unsigned int val, int *reg)
|
|
{
|
|
/* each step is 0.200 mA */
|
|
*reg = val / 200;
|
|
|
|
return *reg > 0xff ? -EINVAL : 0;
|
|
}
|
|
|
|
static int max30102_led_init(struct max30102_data *data)
|
|
{
|
|
struct device *dev = &data->client->dev;
|
|
unsigned int val;
|
|
int reg, ret;
|
|
|
|
ret = device_property_read_u32(dev, "maxim,red-led-current-microamp", &val);
|
|
if (ret) {
|
|
dev_info(dev, "no red-led-current-microamp set\n");
|
|
|
|
/* Default to 7 mA RED LED */
|
|
val = 7000;
|
|
}
|
|
|
|
ret = max30102_get_current_idx(val, ®);
|
|
if (ret) {
|
|
dev_err(dev, "invalid RED LED current setting %d\n", val);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_write(data->regmap, MAX30102_REG_RED_LED_CONFIG, reg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (data->chip_id == max30105) {
|
|
ret = device_property_read_u32(dev,
|
|
"maxim,green-led-current-microamp", &val);
|
|
if (ret) {
|
|
dev_info(dev, "no green-led-current-microamp set\n");
|
|
|
|
/* Default to 7 mA green LED */
|
|
val = 7000;
|
|
}
|
|
|
|
ret = max30102_get_current_idx(val, ®);
|
|
if (ret) {
|
|
dev_err(dev, "invalid green LED current setting %d\n",
|
|
val);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_write(data->regmap, MAX30105_REG_GREEN_LED_CONFIG,
|
|
reg);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = device_property_read_u32(dev, "maxim,ir-led-current-microamp", &val);
|
|
if (ret) {
|
|
dev_info(dev, "no ir-led-current-microamp set\n");
|
|
|
|
/* Default to 7 mA IR LED */
|
|
val = 7000;
|
|
}
|
|
|
|
ret = max30102_get_current_idx(val, ®);
|
|
if (ret) {
|
|
dev_err(dev, "invalid IR LED current setting %d\n", val);
|
|
return ret;
|
|
}
|
|
|
|
return regmap_write(data->regmap, MAX30102_REG_IR_LED_CONFIG, reg);
|
|
}
|
|
|
|
static int max30102_chip_init(struct max30102_data *data)
|
|
{
|
|
int ret;
|
|
|
|
/* setup LED current settings */
|
|
ret = max30102_led_init(data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* configure 18-bit HR + SpO2 readings at 400Hz */
|
|
ret = regmap_write(data->regmap, MAX30102_REG_SPO2_CONFIG,
|
|
(MAX30102_REG_SPO2_CONFIG_ADC_4096_STEPS
|
|
<< MAX30102_REG_SPO2_CONFIG_ADC_MASK_SHIFT) |
|
|
(MAX30102_REG_SPO2_CONFIG_SR_400HZ
|
|
<< MAX30102_REG_SPO2_CONFIG_SR_MASK_SHIFT) |
|
|
MAX30102_REG_SPO2_CONFIG_PULSE_411_US);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* average 4 samples + generate FIFO interrupt */
|
|
ret = regmap_write(data->regmap, MAX30102_REG_FIFO_CONFIG,
|
|
(MAX30102_REG_FIFO_CONFIG_AVG_4SAMPLES
|
|
<< MAX30102_REG_FIFO_CONFIG_AVG_SHIFT) |
|
|
MAX30102_REG_FIFO_CONFIG_AFULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* enable FIFO interrupt */
|
|
return regmap_update_bits(data->regmap, MAX30102_REG_INT_ENABLE,
|
|
MAX30102_REG_INT_ENABLE_MASK,
|
|
MAX30102_REG_INT_ENABLE_FIFO_EN);
|
|
}
|
|
|
|
static int max30102_read_temp(struct max30102_data *data, int *val)
|
|
{
|
|
int ret;
|
|
unsigned int reg;
|
|
|
|
ret = regmap_read(data->regmap, MAX30102_REG_TEMP_INTEGER, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = reg << 4;
|
|
|
|
ret = regmap_read(data->regmap, MAX30102_REG_TEMP_FRACTION, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val |= reg & 0xf;
|
|
*val = sign_extend32(*val, 11);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max30102_get_temp(struct max30102_data *data, int *val, bool en)
|
|
{
|
|
int ret;
|
|
|
|
if (en) {
|
|
ret = max30102_set_power(data, true);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/* start acquisition */
|
|
ret = regmap_update_bits(data->regmap, MAX30102_REG_TEMP_CONFIG,
|
|
MAX30102_REG_TEMP_CONFIG_TEMP_EN,
|
|
MAX30102_REG_TEMP_CONFIG_TEMP_EN);
|
|
if (ret)
|
|
goto out;
|
|
|
|
msleep(35);
|
|
ret = max30102_read_temp(data, val);
|
|
|
|
out:
|
|
if (en)
|
|
max30102_set_power(data, false);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int max30102_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2, long mask)
|
|
{
|
|
struct max30102_data *data = iio_priv(indio_dev);
|
|
int ret = -EINVAL;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
/*
|
|
* Temperature reading can only be acquired when not in
|
|
* shutdown; leave shutdown briefly when buffer not running
|
|
*/
|
|
mutex_lock(&indio_dev->mlock);
|
|
if (!iio_buffer_enabled(indio_dev))
|
|
ret = max30102_get_temp(data, val, true);
|
|
else
|
|
ret = max30102_get_temp(data, val, false);
|
|
mutex_unlock(&indio_dev->mlock);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
*val = 1000; /* 62.5 */
|
|
*val2 = 16;
|
|
ret = IIO_VAL_FRACTIONAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct iio_info max30102_info = {
|
|
.read_raw = max30102_read_raw,
|
|
};
|
|
|
|
static int max30102_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct max30102_data *data;
|
|
struct iio_buffer *buffer;
|
|
struct iio_dev *indio_dev;
|
|
int ret;
|
|
unsigned int reg;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
buffer = devm_iio_kfifo_allocate(&client->dev);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
iio_device_attach_buffer(indio_dev, buffer);
|
|
|
|
indio_dev->name = MAX30102_DRV_NAME;
|
|
indio_dev->info = &max30102_info;
|
|
indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
|
|
indio_dev->setup_ops = &max30102_buffer_setup_ops;
|
|
|
|
data = iio_priv(indio_dev);
|
|
data->indio_dev = indio_dev;
|
|
data->client = client;
|
|
data->chip_id = id->driver_data;
|
|
|
|
mutex_init(&data->lock);
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
switch (data->chip_id) {
|
|
case max30105:
|
|
indio_dev->channels = max30105_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(max30105_channels);
|
|
indio_dev->available_scan_masks = max30105_scan_masks;
|
|
break;
|
|
case max30102:
|
|
indio_dev->channels = max30102_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(max30102_channels);
|
|
indio_dev->available_scan_masks = max30102_scan_masks;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
data->regmap = devm_regmap_init_i2c(client, &max30102_regmap_config);
|
|
if (IS_ERR(data->regmap)) {
|
|
dev_err(&client->dev, "regmap initialization failed\n");
|
|
return PTR_ERR(data->regmap);
|
|
}
|
|
|
|
/* check part ID */
|
|
ret = regmap_read(data->regmap, MAX30102_REG_PART_ID, ®);
|
|
if (ret)
|
|
return ret;
|
|
if (reg != MAX30102_PART_NUMBER)
|
|
return -ENODEV;
|
|
|
|
/* show revision ID */
|
|
ret = regmap_read(data->regmap, MAX30102_REG_REV_ID, ®);
|
|
if (ret)
|
|
return ret;
|
|
dev_dbg(&client->dev, "max3010x revision %02x\n", reg);
|
|
|
|
/* clear mode setting, chip shutdown */
|
|
ret = max30102_set_powermode(data, MAX30102_REG_MODE_CONFIG_MODE_NONE,
|
|
false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = max30102_chip_init(data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (client->irq <= 0) {
|
|
dev_err(&client->dev, "no valid irq defined\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, max30102_interrupt_handler,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
"max30102_irq", indio_dev);
|
|
if (ret) {
|
|
dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
|
|
return ret;
|
|
}
|
|
|
|
return iio_device_register(indio_dev);
|
|
}
|
|
|
|
static int max30102_remove(struct i2c_client *client)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
struct max30102_data *data = iio_priv(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
max30102_set_power(data, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id max30102_id[] = {
|
|
{ "max30102", max30102 },
|
|
{ "max30105", max30105 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max30102_id);
|
|
|
|
static const struct of_device_id max30102_dt_ids[] = {
|
|
{ .compatible = "maxim,max30102" },
|
|
{ .compatible = "maxim,max30105" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, max30102_dt_ids);
|
|
|
|
static struct i2c_driver max30102_driver = {
|
|
.driver = {
|
|
.name = MAX30102_DRV_NAME,
|
|
.of_match_table = max30102_dt_ids,
|
|
},
|
|
.probe = max30102_probe,
|
|
.remove = max30102_remove,
|
|
.id_table = max30102_id,
|
|
};
|
|
module_i2c_driver(max30102_driver);
|
|
|
|
MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
|
|
MODULE_DESCRIPTION("MAX30102 heart rate/pulse oximeter and MAX30105 particle sensor driver");
|
|
MODULE_LICENSE("GPL");
|