drivers/iio/magnetometer/hmc5843.h

   1 /*
   2  * Header file for hmc5843 driver
   3  *
   4  * Split from hmc5843.c
   5  * Copyright (C) Josef Gajdusek <atx@atx.name>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef HMC5843_CORE_H
  13 #define HMC5843_CORE_H
  14
  15 #include <linux/regmap.h>
  16 #include <linux/iio/iio.h>
  17
  18 #define HMC5843_CONFIG_REG_A                    0x00
  19 #define HMC5843_CONFIG_REG_B                    0x01
  20 #define HMC5843_MODE_REG                        0x02
  21 #define HMC5843_DATA_OUT_MSB_REGS               0x03
  22 #define HMC5843_STATUS_REG                      0x09
  23 #define HMC5843_ID_REG                          0x0a
  24 #define HMC5843_ID_END                          0x0c
  25
  26 enum hmc5843_ids {
  27         HMC5843_ID,
  28         HMC5883_ID,
  29         HMC5883L_ID,
  30         HMC5983_ID,
  31 };
  32
  33 /**
  34  * struct hcm5843_data  - device specific data
  35  * @dev:                actual device
  36  * @lock:               update and read regmap data
  37  * @regmap:             hardware access register maps
  38  * @variant:            describe chip variants
  39  * @buffer:             3x 16-bit channels + padding + 64-bit timestamp
  40  */
  41 struct hmc5843_data {
  42         struct device *dev;
  43         struct mutex lock;
  44         struct regmap *regmap;
  45         const struct hmc5843_chip_info *variant;
  46         __be16 buffer[8];
  47 };
  48
  49 int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
  50                          enum hmc5843_ids id, const char *name);
  51 int hmc5843_common_remove(struct device *dev);
  52
  53 int hmc5843_common_suspend(struct device *dev);
  54 int hmc5843_common_resume(struct device *dev);
  55
  56 #ifdef CONFIG_PM_SLEEP
  57 static SIMPLE_DEV_PM_OPS(hmc5843_pm_ops,
  58                 hmc5843_common_suspend,
  59                 hmc5843_common_resume);
  60 #define HMC5843_PM_OPS (&hmc5843_pm_ops)
  61 #else
  62 #define HMC5843_PM_OPS NULL
  63 #endif
  64
  65 #endif /* HMC5843_CORE_H */