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staging:iio:ad7291 cleanup defines 

Use BIT and GENMASK, remove unused defines, use AD7291_VOLTAGE_OFFSET
definition and move AD7291_BITS.

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Hartmut Knaack 2014-08-07 12:06:00 +01:00 committed by Jonathan Cameron
parent 975d98cef8
commit 5714d0c13a
1 changed files with 14 additions and 18 deletions
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32
drivers/staging/iio/adc/ad7291.c
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@ -46,31 +46,27 @@
#define AD7291_VOLTAGE_ALERT_STATUS 0x1F
#define AD7291_T_ALERT_STATUS 0x20
#define AD7291_BITS 12
#define AD7291_VOLTAGE_LIMIT_COUNT 8
/*
* AD7291 command
*/
#define AD7291_AUTOCYCLE (1 << 0)
#define AD7291_RESET (1 << 1)
#define AD7291_ALERT_CLEAR (1 << 2)
#define AD7291_ALERT_POLARITY (1 << 3)
#define AD7291_EXT_REF (1 << 4)
#define AD7291_NOISE_DELAY (1 << 5)
#define AD7291_T_SENSE_MASK (1 << 7)
#define AD7291_VOLTAGE_MASK 0xFF00
#define AD7291_VOLTAGE_OFFSET 0x8
#define AD7291_AUTOCYCLE BIT(0)
#define AD7291_RESET BIT(1)
#define AD7291_ALERT_CLEAR BIT(2)
#define AD7291_ALERT_POLARITY BIT(3)
#define AD7291_EXT_REF BIT(4)
#define AD7291_NOISE_DELAY BIT(5)
#define AD7291_T_SENSE_MASK BIT(7)
#define AD7291_VOLTAGE_MASK GENMASK(15, 8)
#define AD7291_VOLTAGE_OFFSET 8
/*
* AD7291 value masks
*/
#define AD7291_CHANNEL_MASK 0xF000
#define AD7291_BITS 12
#define AD7291_VALUE_MASK 0xFFF
#define AD7291_T_VALUE_SIGN 0x400
#define AD7291_T_VALUE_FLOAT_OFFSET 2
#define AD7291_T_VALUE_FLOAT_MASK 0x2
#define AD7291_VALUE_MASK GENMASK(11, 0)
struct ad7291_chip_info {
struct i2c_client *client;
@ -172,7 +168,7 @@ static unsigned int ad7291_threshold_reg(const struct iio_chan_spec *chan,
offset = chan->channel;
break;
case IIO_TEMP:
offset = 8;
offset = AD7291_VOLTAGE_OFFSET;
break;
default:
return 0;
@ -251,7 +247,7 @@ static int ad7291_read_event_config(struct iio_dev *indio_dev,
switch (chan->type) {
case IIO_VOLTAGE:
if (chip->c_mask & (1 << (15 - chan->channel)))
if (chip->c_mask & BIT(15 - chan->channel))
return 1;
else
return 0;
@ -336,7 +332,7 @@ static int ad7291_read_raw(struct iio_dev *indio_dev,
}
/* Enable this channel alone */
regval = chip->command & (~AD7291_VOLTAGE_MASK);
regval |= 1 << (15 - chan->channel);
regval |= BIT(15 - chan->channel);
ret = ad7291_i2c_write(chip, AD7291_COMMAND, regval);
if (ret < 0) {
mutex_unlock(&chip->state_lock);