drivers/iio/pressure/bmp280-regmap.c

   1 #include <linux/device.h>
   2 #include <linux/module.h>
   3 #include <linux/regmap.h>
   4
   5 #include "bmp280.h"
   6
   7 static bool bmp180_is_writeable_reg(struct device *dev, unsigned int reg)
   8 {
   9         switch (reg) {
  10         case BMP280_REG_CTRL_MEAS:
  11         case BMP280_REG_RESET:
  12                 return true;
  13         default:
  14                 return false;
  15         };
  16 }
  17
  18 static bool bmp180_is_volatile_reg(struct device *dev, unsigned int reg)
  19 {
  20         switch (reg) {
  21         case BMP180_REG_OUT_XLSB:
  22         case BMP180_REG_OUT_LSB:
  23         case BMP180_REG_OUT_MSB:
  24         case BMP280_REG_CTRL_MEAS:
  25                 return true;
  26         default:
  27                 return false;
  28         }
  29 }
  30
  31 const struct regmap_config bmp180_regmap_config = {
  32         .reg_bits = 8,
  33         .val_bits = 8,
  34
  35         .max_register = BMP180_REG_OUT_XLSB,
  36         .cache_type = REGCACHE_RBTREE,
  37
  38         .writeable_reg = bmp180_is_writeable_reg,
  39         .volatile_reg = bmp180_is_volatile_reg,
  40 };
  41 EXPORT_SYMBOL(bmp180_regmap_config);
  42
  43 static bool bmp280_is_writeable_reg(struct device *dev, unsigned int reg)
  44 {
  45         switch (reg) {
  46         case BMP280_REG_CONFIG:
  47         case BMP280_REG_CTRL_HUMIDITY:
  48         case BMP280_REG_CTRL_MEAS:
  49         case BMP280_REG_RESET:
  50                 return true;
  51         default:
  52                 return false;
  53         };
  54 }
  55
  56 static bool bmp280_is_volatile_reg(struct device *dev, unsigned int reg)
  57 {
  58         switch (reg) {
  59         case BMP280_REG_HUMIDITY_LSB:
  60         case BMP280_REG_HUMIDITY_MSB:
  61         case BMP280_REG_TEMP_XLSB:
  62         case BMP280_REG_TEMP_LSB:
  63         case BMP280_REG_TEMP_MSB:
  64         case BMP280_REG_PRESS_XLSB:
  65         case BMP280_REG_PRESS_LSB:
  66         case BMP280_REG_PRESS_MSB:
  67         case BMP280_REG_STATUS:
  68                 return true;
  69         default:
  70                 return false;
  71         }
  72 }
  73
  74 const struct regmap_config bmp280_regmap_config = {
  75         .reg_bits = 8,
  76         .val_bits = 8,
  77
  78         .max_register = BMP280_REG_HUMIDITY_LSB,
  79         .cache_type = REGCACHE_RBTREE,
  80
  81         .writeable_reg = bmp280_is_writeable_reg,
  82         .volatile_reg = bmp280_is_volatile_reg,
  83 };
  84 EXPORT_SYMBOL(bmp280_regmap_config);