staging:iio:cdc:ad7150: More consistent register and field naming

Add _REG postfix to register addresses to avoid confusion with
fields.  Also add additional field defines and use throughout the
driver in place of magic numbers.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210314181511.531414-14-jic23@kernel.org

diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index bfb80e21174223058cecca3cd06d1d41f20ae074..71e02e912f438fdd183d81a70c31418daef3d289 100644 (file)
--- a/drivers/staging/iio/cdc/ad7150.c
+++ b/drivers/staging/iio/cdc/ad7150.c
@@ -21,37 +21,38 @@
  * AD7150 registers definition
  */
 
-#define AD7150_STATUS              0
-#define AD7150_STATUS_OUT1         BIT(3)
-#define AD7150_STATUS_OUT2         BIT(5)
-#define AD7150_CH1_DATA_HIGH       1
-#define AD7150_CH2_DATA_HIGH       3
-#define AD7150_CH1_AVG_HIGH        5
-#define AD7150_CH2_AVG_HIGH        7
-#define AD7150_CH1_SENSITIVITY     9
-#define AD7150_CH1_THR_HOLD_H      9
-#define AD7150_CH1_TIMEOUT         10
-#define AD7150_CH1_SETUP           11
-#define AD7150_CH2_SENSITIVITY     12
-#define AD7150_CH2_THR_HOLD_H      12
-#define AD7150_CH2_TIMEOUT         13
-#define AD7150_CH2_SETUP           14
-#define AD7150_CFG                 15
-#define AD7150_CFG_FIX             BIT(7)
-#define AD7150_PD_TIMER            16
-#define AD7150_CH1_CAPDAC          17
-#define AD7150_CH2_CAPDAC          18
-#define AD7150_SN3                 19
-#define AD7150_SN2                 20
-#define AD7150_SN1                 21
-#define AD7150_SN0                 22
-#define AD7150_ID                  23
-
-/* AD7150 masks */
-#define AD7150_THRESHTYPE_MSK                  GENMASK(6, 5)
-
-#define AD7150_CH_TIMEOUT_RECEDING             GENMASK(3, 0)
-#define AD7150_CH_TIMEOUT_APPROACHING          GENMASK(7, 4)
+#define AD7150_STATUS_REG              0
+#define   AD7150_STATUS_OUT1           BIT(3)
+#define   AD7150_STATUS_OUT2           BIT(5)
+#define AD7150_CH1_DATA_HIGH_REG       1
+#define AD7150_CH2_DATA_HIGH_REG       3
+#define AD7150_CH1_AVG_HIGH_REG                5
+#define AD7150_CH2_AVG_HIGH_REG                7
+#define AD7150_CH1_SENSITIVITY_REG     9
+#define AD7150_CH1_THR_HOLD_H_REG      9
+#define AD7150_CH1_TIMEOUT_REG         10
+#define   AD7150_CH_TIMEOUT_RECEDING   GENMASK(3, 0)
+#define   AD7150_CH_TIMEOUT_APPROACHING        GENMASK(7, 4)
+#define AD7150_CH1_SETUP_REG           11
+#define AD7150_CH2_SENSITIVITY_REG     12
+#define AD7150_CH2_THR_HOLD_H_REG      12
+#define AD7150_CH2_TIMEOUT_REG         13
+#define AD7150_CH2_SETUP_REG           14
+#define AD7150_CFG_REG                 15
+#define   AD7150_CFG_FIX               BIT(7)
+#define   AD7150_CFG_THRESHTYPE_MSK    GENMASK(6, 5)
+#define   AD7150_CFG_TT_NEG            0x0
+#define   AD7150_CFG_TT_POS            0x1
+#define   AD7150_CFG_TT_IN_WINDOW      0x2
+#define   AD7150_CFG_TT_OUT_WINDOW     0x3
+#define AD7150_PD_TIMER_REG            16
+#define AD7150_CH1_CAPDAC_REG          17
+#define AD7150_CH2_CAPDAC_REG          18
+#define AD7150_SN3_REG                 19
+#define AD7150_SN2_REG                 20
+#define AD7150_SN1_REG                 21
+#define AD7150_SN0_REG                 22
+#define AD7150_ID_REG                  23
 
 enum {
        AD7150,
@@ -93,12 +94,12 @@ struct ad7150_chip_info {
  */
 
 static const u8 ad7150_addresses[][6] = {
-       { AD7150_CH1_DATA_HIGH, AD7150_CH1_AVG_HIGH,
-         AD7150_CH1_SETUP, AD7150_CH1_THR_HOLD_H,
-         AD7150_CH1_SENSITIVITY, AD7150_CH1_TIMEOUT },
-       { AD7150_CH2_DATA_HIGH, AD7150_CH2_AVG_HIGH,
-         AD7150_CH2_SETUP, AD7150_CH2_THR_HOLD_H,
-         AD7150_CH2_SENSITIVITY, AD7150_CH2_TIMEOUT },
+       { AD7150_CH1_DATA_HIGH_REG, AD7150_CH1_AVG_HIGH_REG,
+         AD7150_CH1_SETUP_REG, AD7150_CH1_THR_HOLD_H_REG,
+         AD7150_CH1_SENSITIVITY_REG, AD7150_CH1_TIMEOUT_REG },
+       { AD7150_CH2_DATA_HIGH_REG, AD7150_CH2_AVG_HIGH_REG,
+         AD7150_CH2_SETUP_REG, AD7150_CH2_THR_HOLD_H_REG,
+         AD7150_CH2_SENSITIVITY_REG, AD7150_CH2_TIMEOUT_REG },
 };
 
 static int ad7150_read_raw(struct iio_dev *indio_dev,
@@ -147,11 +148,11 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev,
        bool thrfixed;
        struct ad7150_chip_info *chip = iio_priv(indio_dev);
 
-       ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG);
+       ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG_REG);
        if (ret < 0)
                return ret;
 
-       threshtype = FIELD_GET(AD7150_THRESHTYPE_MSK, ret);
+       threshtype = FIELD_GET(AD7150_CFG_THRESHTYPE_MSK, ret);
 
        /*check if threshold mode is fixed or adaptive*/
        thrfixed = FIELD_GET(AD7150_CFG_FIX, ret);
@@ -159,12 +160,12 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev,
        switch (type) {
        case IIO_EV_TYPE_THRESH_ADAPTIVE:
                if (dir == IIO_EV_DIR_RISING)
-                       return !thrfixed && (threshtype == 0x1);
-               return !thrfixed && (threshtype == 0x0);
+                       return !thrfixed && (threshtype == AD7150_CFG_TT_POS);
+               return !thrfixed && (threshtype == AD7150_CFG_TT_NEG);
        case IIO_EV_TYPE_THRESH:
                if (dir == IIO_EV_DIR_RISING)
-                       return thrfixed && (threshtype == 0x1);
-               return thrfixed && (threshtype == 0x0);
+                       return thrfixed && (threshtype == AD7150_CFG_TT_POS);
+               return thrfixed && (threshtype == AD7150_CFG_TT_NEG);
        default:
                break;
        }
@@ -226,7 +227,7 @@ static int ad7150_write_event_config(struct iio_dev *indio_dev,
                                     enum iio_event_type type,
                                     enum iio_event_direction dir, int state)
 {
-       u8 thresh_type, cfg, adaptive;
+       u8 thresh_type, cfg, fixed;
        int ret;
        struct ad7150_chip_info *chip = iio_priv(indio_dev);
        int rising = (dir == IIO_EV_DIR_RISING);
@@ -261,35 +262,27 @@ static int ad7150_write_event_config(struct iio_dev *indio_dev,
                disable_irq(chip->interrupts[0]);
                disable_irq(chip->interrupts[1]);
 
-               ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG);
+               ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG_REG);
                if (ret < 0)
                        goto error_ret;
 
-               cfg = ret & ~((0x03 << 5) | BIT(7));
+               cfg = ret & ~(AD7150_CFG_THRESHTYPE_MSK | AD7150_CFG_FIX);
 
-               switch (type) {
-               case IIO_EV_TYPE_THRESH_ADAPTIVE:
-                       adaptive = 1;
-                       if (rising)
-                               thresh_type = 0x1;
-                       else
-                               thresh_type = 0x0;
-                       break;
-               case IIO_EV_TYPE_THRESH:
-                       adaptive = 0;
-                       if (rising)
-                               thresh_type = 0x1;
-                       else
-                               thresh_type = 0x0;
-                       break;
-               default:
-                       ret = -EINVAL;
-                       goto error_ret;
-               }
+               if (type == IIO_EV_TYPE_THRESH_ADAPTIVE)
+                       fixed = 0;
+               else
+                       fixed = 1;
+
+               if (rising)
+                       thresh_type = AD7150_CFG_TT_POS;
+               else
+                       thresh_type = AD7150_CFG_TT_NEG;
 
-               cfg |= (!adaptive << 7) | (thresh_type << 5);
+               cfg |= FIELD_PREP(AD7150_CFG_FIX, fixed) |
+                       FIELD_PREP(AD7150_CFG_THRESHTYPE_MSK, thresh_type);
 
-               ret = i2c_smbus_write_byte_data(chip->client, AD7150_CFG, cfg);
+               ret = i2c_smbus_write_byte_data(chip->client, AD7150_CFG_REG,
+                                               cfg);
                if (ret < 0)
                        goto error_ret;
 
@@ -480,7 +473,7 @@ static irqreturn_t __ad7150_event_handler(void *private, u8 status_mask,
        s64 timestamp = iio_get_time_ns(indio_dev);
        int int_status;
 
-       int_status = i2c_smbus_read_byte_data(chip->client, AD7150_STATUS);
+       int_status = i2c_smbus_read_byte_data(chip->client, AD7150_STATUS_REG);
        if (int_status < 0)
                return IRQ_HANDLED;