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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-12 09:45:34 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-12 09:45:34 +0200 |
commit | fba51482b6c0a6743b441bd57d53be11beb35a9b (patch) | |
tree | d0ccb4c70af9cc3e3c8b6f017244ccffe17294cf /drivers/iio/pressure/bmp280.h | |
parent | 5790d407daa30356669758180b68144a9518da0a (diff) | |
parent | c86b0e73f0bebbb0245ef2bac4cf269d61ff828c (diff) | |
download | linux-stable-fba51482b6c0a6743b441bd57d53be11beb35a9b.tar.gz linux-stable-fba51482b6c0a6743b441bd57d53be11beb35a9b.tar.bz2 linux-stable-fba51482b6c0a6743b441bd57d53be11beb35a9b.zip |
Merge tag 'iio-for-6.4a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next
Jonathan writes:
1st set of IIO new device support, features and cleanups for the 6.4 cycle.
New device support
* bosch,bmp280
- Add support for BMP580 - includes significant refactoring and general
driver cleanup + support for non-volatile memory for trimming and config
parameters.
* rohm BU27034
- New driver for this 3 channel ambient light sensor.
- New support library for devices where both integration time and
amplifier gain are configurable. In these cases a scale change
may require changing bother underlying values. This library module
provides code to help with this.
* st,accel
- Add support for IIS328DQ (ID only as compatible wtih LIS331DL)
* st,lsm6dsx
- Add support for ASM330LHB automotive MEMS sensor.
* ti,ads1100, ads1000
- New driver for these 16 bit ADCs.
* ti,tmp117
- Add support for older tmp116 device. Includes some general driver cleanup.
Staging driver drops
* adi,ade7854
- Driver was a very long way from compliant with IIO infrastructure and ABI.
If anyone wants a non staging version of this driver they are better off
starting from scratch. Hence drop it and the associated meter.h header.
Features
* adi,ad7441r
- Add DT binding to set sink current for digital input.
* semtech,sx9324,9360
- Support older register mapping from firmware designed for windows.
Core improvements.
* Move iio_trigger_poll() docs to next to the implementation and add a note
on expected caller context.
* Rename iio_trigger_poll_chained() to iio_trigger_poll_nested() so
as to use more standard / common terminology.
* Improve main ABI docs references to offset and scale for raw values by
making them consistent and clear.
Cleanups and minor fixes:
* adi,ad5592r
- Add GPIO names - useful for debug.
* adi,ad7441r
- Fix current input, loop powered mode configuration setup.
* adi,adis16475
- Fix wrong commented value for minimum advised lower rate.
* adi,admv1013
- Use devm_clk_get_enabled() to reduce boilerplate.
* adi,ads1210
- Fix wrong bits for writing config register (late fix and has
been broken a long time so not rushed upstream)
* amlogic,meson-saradc
- Improve cleanup in error handling if BL30 handshake fails.
* apex-embedded,stx104
- Migrate to regmap and use regmap_read_poll_timeout() to neatly handle
retries.
- Add local mutex to close various races.
- Use define U16_MAX rather than value for limit.
- Improve code readability with minor reorganization.
* atmel,ad91-sama5d2
- Drop trivial dead code.
* kionix,kx022a
- Drop unused structure element.
* linear,ltc2983
- Reorganize bindings doc to enable unevaluatedProperties to be set
in one place for all child nodes.
- Make binding for adi,custom-thermocouple accept signed values.
* maxim,max44000
- Add OF Device matching (of_match_table was not correctly set).
* maxim,max5522
- Missing static
* measurement-computing,cio-dac
- Fix wrong part name in comments.
- Migrate to regmap.
- Improve includes by replacing bitops.h with more direct bits.h
* qcom,pm8xxx-xoadc
- Remove a check that can never fail.
* renesas,rcar-gyroadc
- DT binding documentation improvements.
- Tidy up an unused warning with __maybe_unused.
* semtech,sx_common
- Drop docs for a structure element that doesn't exist.
* semtech,sx9500
- Drop ACPI_PTR() and of_match_ptr() protections that just complicate
the code / block some firmware registration types that would otherwise
work.
* sensiron,sps30
- Comment formatting tidy up.
* st,sensors
- Drop duplicate text in DT binding.
* st,stm32-adc
- Add some missing static markings.
* ti,ads1100
- Use correct return code in dev_err_probe() call.
* x-powers,axp20x_adc - precursor series to simplify addition of AXP192.
- General code cleanup / minor refactoring for better readabilty of code.
- Switch from boolean value to mask for adc_en2 field to avoid hard coding
a mask that will be different in AXP192
* tag 'iio-for-6.4a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (63 commits)
MAINTAINERS: Add ROHM BU27034
iio: light: ROHM BU27034 Ambient Light Sensor
dt-bindings: iio: light: Support ROHM BU27034
MAINTAINERS: Add IIO gain-time-scale helpers
iio: light: Add gain-time-scale helpers
doc: Make sysfs-bus-iio doc more exact
iio: dac: set variable max5522_channels storage-class-specifier to static
dt-bindings: iio: temperature: ltc2983: Make 'adi,custom-thermocouple' signed
dt-bindings: iio: temperature: ltc2983: Fix child node unevaluated properties
iio: addac: stx104: Use regmap_read_poll_timeout() for conversion poll
iio: addac: stx104: Migrate to the regmap API
iio: addac: stx104: Improve indentation in stx104_write_raw()
iio: addac: stx104: Use define rather than hardcoded limit for write val
iio: addac: stx104: Fix race condition when converting analog-to-digital
iio: addac: stx104: Fix race condition for stx104_write_raw()
dt-bindings: iio: st-sensors: Fix repeated text
staging: iio: resolver: ads1210: fix config mode
iio: adc: ti-ads1100: fix error code in probe()
iio: accel: add support for IIS328DQ variant
dt-bindings: iio: st-sensors: Add IIS328DQ accelerometer
...
Diffstat (limited to 'drivers/iio/pressure/bmp280.h')
-rw-r--r-- | drivers/iio/pressure/bmp280.h | 273 |
1 files changed, 272 insertions, 1 deletions
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h index c791325c7416..5c0563ce7572 100644 --- a/drivers/iio/pressure/bmp280.h +++ b/drivers/iio/pressure/bmp280.h @@ -1,7 +1,114 @@ /* SPDX-License-Identifier: GPL-2.0 */ #include <linux/bitops.h> #include <linux/device.h> +#include <linux/iio/iio.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> + + +/* BMP580 specific registers */ +#define BMP580_REG_CMD 0x7E +#define BMP580_REG_EFF_OSR 0x38 +#define BMP580_REG_ODR_CONFIG 0x37 +#define BMP580_REG_OSR_CONFIG 0x36 +#define BMP580_REG_IF_CONFIG 0x13 +#define BMP580_REG_REV_ID 0x02 +#define BMP580_REG_CHIP_ID 0x01 +/* OOR allows to configure a pressure alarm */ +#define BMP580_REG_OOR_CONFIG 0x35 +#define BMP580_REG_OOR_RANGE 0x34 +#define BMP580_REG_OOR_THR_MSB 0x33 +#define BMP580_REG_OOR_THR_LSB 0x32 +/* DSP registers (IIR filters) */ +#define BMP580_REG_DSP_IIR 0x31 +#define BMP580_REG_DSP_CONFIG 0x30 +/* NVM access registers */ +#define BMP580_REG_NVM_DATA_MSB 0x2D +#define BMP580_REG_NVM_DATA_LSB 0x2C +#define BMP580_REG_NVM_ADDR 0x2B +/* Status registers */ +#define BMP580_REG_STATUS 0x28 +#define BMP580_REG_INT_STATUS 0x27 +#define BMP580_REG_CHIP_STATUS 0x11 +/* Data registers */ +#define BMP580_REG_FIFO_DATA 0x29 +#define BMP580_REG_PRESS_MSB 0x22 +#define BMP580_REG_PRESS_LSB 0x21 +#define BMP580_REG_PRESS_XLSB 0x20 +#define BMP580_REG_TEMP_MSB 0x1F +#define BMP580_REG_TEMP_LSB 0x1E +#define BMP580_REG_TEMP_XLSB 0x1D +/* FIFO config registers */ +#define BMP580_REG_FIFO_SEL 0x18 +#define BMP580_REG_FIFO_COUNT 0x17 +#define BMP580_REG_FIFO_CONFIG 0x16 +/* Interruptions config registers */ +#define BMP580_REG_INT_SOURCE 0x15 +#define BMP580_REG_INT_CONFIG 0x14 + +#define BMP580_CMD_NOOP 0x00 +#define BMP580_CMD_EXTMODE_SEQ_0 0x73 +#define BMP580_CMD_EXTMODE_SEQ_1 0xB4 +#define BMP580_CMD_EXTMODE_SEQ_2 0x69 +#define BMP580_CMD_NVM_OP_SEQ_0 0x5D +#define BMP580_CMD_NVM_READ_SEQ_1 0xA5 +#define BMP580_CMD_NVM_WRITE_SEQ_1 0xA0 +#define BMP580_CMD_SOFT_RESET 0xB6 + +#define BMP580_INT_STATUS_POR_MASK BIT(4) + +#define BMP580_STATUS_CORE_RDY_MASK BIT(0) +#define BMP580_STATUS_NVM_RDY_MASK BIT(1) +#define BMP580_STATUS_NVM_ERR_MASK BIT(2) +#define BMP580_STATUS_NVM_CMD_ERR_MASK BIT(3) + +#define BMP580_OSR_PRESS_MASK GENMASK(5, 3) +#define BMP580_OSR_TEMP_MASK GENMASK(2, 0) +#define BMP580_OSR_PRESS_EN BIT(6) +#define BMP580_EFF_OSR_PRESS_MASK GENMASK(5, 3) +#define BMP580_EFF_OSR_TEMP_MASK GENMASK(2, 0) +#define BMP580_EFF_OSR_VALID_ODR BIT(7) + +#define BMP580_ODR_MASK GENMASK(6, 2) +#define BMP580_MODE_MASK GENMASK(1, 0) +#define BMP580_MODE_SLEEP 0 +#define BMP580_MODE_NORMAL 1 +#define BMP580_MODE_FORCED 2 +#define BMP580_MODE_CONTINOUS 3 +#define BMP580_ODR_DEEPSLEEP_DIS BIT(7) + +#define BMP580_DSP_COMP_MASK GENMASK(1, 0) +#define BMP580_DSP_COMP_DIS 0 +#define BMP580_DSP_TEMP_COMP_EN 1 +/* + * In section 7.27 of datasheet, modes 2 and 3 are technically the same. + * Pressure compensation means also enabling temperature compensation + */ +#define BMP580_DSP_PRESS_COMP_EN 2 +#define BMP580_DSP_PRESS_TEMP_COMP_EN 3 +#define BMP580_DSP_IIR_FORCED_FLUSH BIT(2) +#define BMP580_DSP_SHDW_IIR_TEMP_EN BIT(3) +#define BMP580_DSP_FIFO_IIR_TEMP_EN BIT(4) +#define BMP580_DSP_SHDW_IIR_PRESS_EN BIT(5) +#define BMP580_DSP_FIFO_IIR_PRESS_EN BIT(6) +#define BMP580_DSP_OOR_IIR_PRESS_EN BIT(7) + +#define BMP580_DSP_IIR_PRESS_MASK GENMASK(5, 3) +#define BMP580_DSP_IIR_TEMP_MASK GENMASK(2, 0) +#define BMP580_FILTER_OFF 0 +#define BMP580_FILTER_1X 1 +#define BMP580_FILTER_3X 2 +#define BMP580_FILTER_7X 3 +#define BMP580_FILTER_15X 4 +#define BMP580_FILTER_31X 5 +#define BMP580_FILTER_63X 6 +#define BMP580_FILTER_127X 7 + +#define BMP580_NVM_ROW_ADDR_MASK GENMASK(5, 0) +#define BMP580_NVM_PROG_EN BIT(6) + +#define BMP580_TEMP_SKIPPED 0x7f7f7f +#define BMP580_PRESS_SKIPPED 0x7f7f7f /* BMP380 specific registers */ #define BMP380_REG_CMD 0x7E @@ -181,6 +288,8 @@ #define BMP280_REG_ID 0xD0 #define BMP380_CHIP_ID 0x50 +#define BMP580_CHIP_ID 0x50 +#define BMP580_CHIP_ID_ALT 0x51 #define BMP180_CHIP_ID 0x55 #define BMP280_CHIP_ID 0x58 #define BME280_CHIP_ID 0x60 @@ -191,15 +300,177 @@ #define BMP280_PRESS_SKIPPED 0x80000 #define BMP280_HUMIDITY_SKIPPED 0x8000 +/* Core exported structs */ + +static const char *const bmp280_supply_names[] = { + "vddd", "vdda" +}; + +#define BMP280_NUM_SUPPLIES ARRAY_SIZE(bmp280_supply_names) + +struct bmp180_calib { + s16 AC1; + s16 AC2; + s16 AC3; + u16 AC4; + u16 AC5; + u16 AC6; + s16 B1; + s16 B2; + s16 MB; + s16 MC; + s16 MD; +}; + +/* See datasheet Section 4.2.2. */ +struct bmp280_calib { + u16 T1; + s16 T2; + s16 T3; + u16 P1; + s16 P2; + s16 P3; + s16 P4; + s16 P5; + s16 P6; + s16 P7; + s16 P8; + s16 P9; + u8 H1; + s16 H2; + u8 H3; + s16 H4; + s16 H5; + s8 H6; +}; + +/* See datasheet Section 3.11.1. */ +struct bmp380_calib { + u16 T1; + u16 T2; + s8 T3; + s16 P1; + s16 P2; + s8 P3; + s8 P4; + u16 P5; + u16 P6; + s8 P7; + s8 P8; + s16 P9; + s8 P10; + s8 P11; +}; + +struct bmp280_data { + struct device *dev; + struct mutex lock; + struct regmap *regmap; + struct completion done; + bool use_eoc; + const struct bmp280_chip_info *chip_info; + union { + struct bmp180_calib bmp180; + struct bmp280_calib bmp280; + struct bmp380_calib bmp380; + } calib; + struct regulator_bulk_data supplies[BMP280_NUM_SUPPLIES]; + unsigned int start_up_time; /* in microseconds */ + + /* log of base 2 of oversampling rate */ + u8 oversampling_press; + u8 oversampling_temp; + u8 oversampling_humid; + u8 iir_filter_coeff; + + /* + * BMP380 devices introduce sampling frequency configuration. See + * datasheet sections 3.3.3. and 4.3.19 for more details. + * + * BMx280 devices allowed indirect configuration of sampling frequency + * changing the t_standby duration between measurements, as detailed on + * section 3.6.3 of the datasheet. + */ + int sampling_freq; + + /* + * Carryover value from temperature conversion, used in pressure + * calculation. + */ + s32 t_fine; + + /* + * DMA (thus cache coherency maintenance) may require the + * transfer buffers to live in their own cache lines. + */ + union { + /* Sensor data buffer */ + u8 buf[3]; + /* Calibration data buffers */ + __le16 bmp280_cal_buf[BMP280_CONTIGUOUS_CALIB_REGS / 2]; + __be16 bmp180_cal_buf[BMP180_REG_CALIB_COUNT / 2]; + u8 bmp380_cal_buf[BMP380_CALIB_REG_COUNT]; + /* Miscellaneous, endianess-aware data buffers */ + __le16 le16; + __be16 be16; + } __aligned(IIO_DMA_MINALIGN); +}; + +struct bmp280_chip_info { + unsigned int id_reg; + const unsigned int chip_id; + + const struct regmap_config *regmap_config; + + const struct iio_chan_spec *channels; + int num_channels; + unsigned int start_up_time; + + const int *oversampling_temp_avail; + int num_oversampling_temp_avail; + int oversampling_temp_default; + + const int *oversampling_press_avail; + int num_oversampling_press_avail; + int oversampling_press_default; + + const int *oversampling_humid_avail; + int num_oversampling_humid_avail; + int oversampling_humid_default; + + const int *iir_filter_coeffs_avail; + int num_iir_filter_coeffs_avail; + int iir_filter_coeff_default; + + const int (*sampling_freq_avail)[2]; + int num_sampling_freq_avail; + int sampling_freq_default; + + int (*chip_config)(struct bmp280_data *); + int (*read_temp)(struct bmp280_data *, int *, int *); + int (*read_press)(struct bmp280_data *, int *, int *); + int (*read_humid)(struct bmp280_data *, int *, int *); + int (*read_calib)(struct bmp280_data *); + int (*preinit)(struct bmp280_data *); +}; + +/* Chip infos for each variant */ +extern const struct bmp280_chip_info bmp180_chip_info; +extern const struct bmp280_chip_info bmp280_chip_info; +extern const struct bmp280_chip_info bme280_chip_info; +extern const struct bmp280_chip_info bmp380_chip_info; +extern const struct bmp280_chip_info bmp580_chip_info; + /* Regmap configurations */ extern const struct regmap_config bmp180_regmap_config; extern const struct regmap_config bmp280_regmap_config; extern const struct regmap_config bmp380_regmap_config; +extern const struct regmap_config bmp580_regmap_config; /* Probe called from different transports */ int bmp280_common_probe(struct device *dev, struct regmap *regmap, - unsigned int chip, + const struct bmp280_chip_info *, const char *name, int irq); |