drivers/iio/accel/adxl313.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * ADXL313 3-Axis Digital Accelerometer
   4  *
   5  * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
   6  */
   7
   8 #ifndef _ADXL313_H_
   9 #define _ADXL313_H_
  10
  11 #include <linux/iio/iio.h>
  12
  13 /* ADXL313 register definitions */
  14 #define ADXL313_REG_DEVID0              0x00
  15 #define ADXL313_REG_DEVID1              0x01
  16 #define ADXL313_REG_PARTID              0x02
  17 #define ADXL313_REG_XID                 0x04
  18 #define ADXL313_REG_SOFT_RESET          0x18
  19 #define ADXL313_REG_OFS_AXIS(index)     (0x1E + (index))
  20 #define ADXL313_REG_THRESH_ACT          0x24
  21 #define ADXL313_REG_ACT_INACT_CTL       0x27
  22 #define ADXL313_REG_BW_RATE             0x2C
  23 #define ADXL313_REG_POWER_CTL           0x2D
  24 #define ADXL313_REG_INT_MAP             0x2F
  25 #define ADXL313_REG_DATA_FORMAT         0x31
  26 #define ADXL313_REG_DATA_AXIS(index)    (0x32 + ((index) * 2))
  27 #define ADXL313_REG_FIFO_CTL            0x38
  28 #define ADXL313_REG_FIFO_STATUS         0x39
  29
  30 #define ADXL313_DEVID0                  0xAD
  31 #define ADXL313_DEVID0_ADXL312_314      0xE5
  32 #define ADXL313_DEVID1                  0x1D
  33 #define ADXL313_PARTID                  0xCB
  34 #define ADXL313_SOFT_RESET              0x52
  35
  36 #define ADXL313_RATE_MSK                GENMASK(3, 0)
  37 #define ADXL313_RATE_BASE               6
  38
  39 #define ADXL313_POWER_CTL_MSK           GENMASK(3, 2)
  40 #define ADXL313_MEASUREMENT_MODE        BIT(3)
  41
  42 #define ADXL313_RANGE_MSK               GENMASK(1, 0)
  43 #define ADXL313_RANGE_MAX               3
  44
  45 #define ADXL313_FULL_RES                BIT(3)
  46 #define ADXL313_SPI_3WIRE               BIT(6)
  47 #define ADXL313_I2C_DISABLE             BIT(6)
  48
  49 extern const struct regmap_access_table adxl312_readable_regs_table;
  50 extern const struct regmap_access_table adxl313_readable_regs_table;
  51 extern const struct regmap_access_table adxl314_readable_regs_table;
  52
  53 extern const struct regmap_access_table adxl312_writable_regs_table;
  54 extern const struct regmap_access_table adxl313_writable_regs_table;
  55 extern const struct regmap_access_table adxl314_writable_regs_table;
  56
  57 enum adxl313_device_type {
  58         ADXL312,
  59         ADXL313,
  60         ADXL314,
  61 };
  62
  63 struct adxl313_data {
  64         struct regmap   *regmap;
  65         const struct adxl313_chip_info *chip_info;
  66         struct mutex    lock; /* lock to protect transf_buf */
  67         __le16          transf_buf __aligned(IIO_DMA_MINALIGN);
  68 };
  69
  70 struct adxl313_chip_info {
  71         const char                      *name;
  72         enum adxl313_device_type        type;
  73         int                             scale_factor;
  74         bool                            variable_range;
  75         bool                            soft_reset;
  76         int (*check_id)(struct device *dev, struct adxl313_data *data);
  77 };
  78
  79 extern const struct adxl313_chip_info adxl31x_chip_info[];
  80
  81 int adxl313_core_probe(struct device *dev,
  82                        struct regmap *regmap,
  83                        const struct adxl313_chip_info *chip_info,
  84                        int (*setup)(struct device *, struct regmap *));
  85 #endif /* _ADXL313_H_ */