drivers/iio/accel/bmc150-accel.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BMC150_ACCEL_H_
   3 #define _BMC150_ACCEL_H_
   4
   5 #include <linux/atomic.h>
   6 #include <linux/iio/iio.h>
   7 #include <linux/mutex.h>
   8 #include <linux/regulator/consumer.h>
   9 #include <linux/types.h>
  10 #include <linux/workqueue.h>
  11
  12 struct regmap;
  13 struct i2c_client;
  14 struct bmc150_accel_chip_info;
  15 struct bmc150_accel_interrupt_info;
  16
  17 /*
  18  * We can often guess better than "UNKNOWN" based on the device IDs
  19  * but unfortunately this information is not always accurate. There are some
  20  * devices where ACPI firmware specifies an ID like "BMA250E" when the device
  21  * actually has a BMA222E. The driver attempts to detect those by reading the
  22  * chip ID from the registers but this information is not always enough either.
  23  *
  24  * Therefore, this enum should be only used when the chip ID detection is not
  25  * enough and we can be reasonably sure that the device IDs are reliable
  26  * in practice (e.g. for device tree platforms).
  27  */
  28 enum bmc150_type {
  29         BOSCH_UNKNOWN,
  30         BOSCH_BMC156,
  31 };
  32
  33 struct bmc150_accel_interrupt {
  34         const struct bmc150_accel_interrupt_info *info;
  35         atomic_t users;
  36 };
  37
  38 struct bmc150_accel_trigger {
  39         struct bmc150_accel_data *data;
  40         struct iio_trigger *indio_trig;
  41         int (*setup)(struct bmc150_accel_trigger *t, bool state);
  42         int intr;
  43         bool enabled;
  44 };
  45
  46 enum bmc150_accel_interrupt_id {
  47         BMC150_ACCEL_INT_DATA_READY,
  48         BMC150_ACCEL_INT_ANY_MOTION,
  49         BMC150_ACCEL_INT_WATERMARK,
  50         BMC150_ACCEL_INTERRUPTS,
  51 };
  52
  53 enum bmc150_accel_trigger_id {
  54         BMC150_ACCEL_TRIGGER_DATA_READY,
  55         BMC150_ACCEL_TRIGGER_ANY_MOTION,
  56         BMC150_ACCEL_TRIGGERS,
  57 };
  58
  59 struct bmc150_accel_data {
  60         struct regmap *regmap;
  61         struct regulator_bulk_data regulators[2];
  62         struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
  63         struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
  64         struct mutex mutex;
  65         u8 fifo_mode, watermark;
  66         s16 buffer[8];
  67         /*
  68          * Ensure there is sufficient space and correct alignment for
  69          * the timestamp if enabled
  70          */
  71         struct {
  72                 __le16 channels[3];
  73                 aligned_s64 ts;
  74         } scan;
  75         u8 bw_bits;
  76         u32 slope_dur;
  77         u32 slope_thres;
  78         u32 range;
  79         int ev_enable_state;
  80         int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
  81         const struct bmc150_accel_chip_info *chip_info;
  82         enum bmc150_type type;
  83         struct i2c_client *second_device;
  84         void (*resume_callback)(struct device *dev);
  85         struct delayed_work resume_work;
  86         struct iio_mount_matrix orientation;
  87 };
  88
  89 int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
  90                             enum bmc150_type type, const char *name,
  91                             bool block_supported);
  92 void bmc150_accel_core_remove(struct device *dev);
  93 extern const struct dev_pm_ops bmc150_accel_pm_ops;
  94 extern const struct regmap_config bmc150_regmap_conf;
  95
  96 #endif  /* _BMC150_ACCEL_H_ */