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Commit 874bbd12 authored by Alisa-Dariana Roman's avatar Alisa-Dariana Roman Committed by Jonathan Cameron
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iio: adc: ad7192: Use bitfield access macros 

Include bitfield.h and update driver to use bitfield access macros GENMASK,
FIELD_PREP and FIELD_GET.

Remove old macros in favor of using FIELD_PREP and masks.

Change %d to %ld to match the type of FIELD_GET().
Signed-off-by: default avatarAlisa-Dariana Roman <alisa.roman@analog.com>
Link: https://lore.kernel.org/r/20230924215148.102491-2-alisadariana@gmail.comSigned-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 3b4e0e96
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Showing with 37 additions and 36 deletions
drivers/iio/adc/ad7192.c
View file @ 874bbd12
......@@ -6,6 +6,7 @@
*/
#include <linux/interrupt.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/kernel.h>
......@@ -43,7 +44,7 @@
#define AD7192_COMM_WEN BIT(7) /* Write Enable */
#define AD7192_COMM_WRITE 0 /* Write Operation */
#define AD7192_COMM_READ BIT(6) /* Read Operation */
#define AD7192_COMM_ADDR(x) (((x) & 0x7) << 3) /* Register Address */
#define AD7192_COMM_ADDR_MASK GENMASK(5, 3) /* Register Address Mask */
#define AD7192_COMM_CREAD BIT(2) /* Continuous Read of Data Register */
/* Status Register Bit Designations (AD7192_REG_STAT) */
......@@ -56,17 +57,16 @@
#define AD7192_STAT_CH1 BIT(0) /* Channel 1 */
/* Mode Register Bit Designations (AD7192_REG_MODE) */
#define AD7192_MODE_SEL(x) (((x) & 0x7) << 21) /* Operation Mode Select */
#define AD7192_MODE_SEL_MASK (0x7 << 21) /* Operation Mode Select Mask */
#define AD7192_MODE_STA(x) (((x) & 0x1) << 20) /* Status Register transmission */
#define AD7192_MODE_SEL_MASK GENMASK(23, 21) /* Operation Mode Select Mask */
#define AD7192_MODE_STA_MASK BIT(20) /* Status Register transmission Mask */
#define AD7192_MODE_CLKSRC(x) (((x) & 0x3) << 18) /* Clock Source Select */
#define AD7192_MODE_CLKSRC_MASK GENMASK(19, 18) /* Clock Source Select Mask */
#define AD7192_MODE_SINC3 BIT(15) /* SINC3 Filter Select */
#define AD7192_MODE_ENPAR BIT(13) /* Parity Enable */
#define AD7192_MODE_CLKDIV BIT(12) /* Clock divide by 2 (AD7190/2 only)*/
#define AD7192_MODE_SCYCLE BIT(11) /* Single cycle conversion */
#define AD7192_MODE_REJ60 BIT(10) /* 50/60Hz notch filter */
#define AD7192_MODE_RATE(x) ((x) & 0x3FF) /* Filter Update Rate Select */
/* Filter Update Rate Select Mask */
#define AD7192_MODE_RATE_MASK GENMASK(9, 0)
/* Mode Register: AD7192_MODE_SEL options */
#define AD7192_MODE_CONT 0 /* Continuous Conversion Mode */
......@@ -92,13 +92,12 @@
#define AD7192_CONF_CHOP BIT(23) /* CHOP enable */
#define AD7192_CONF_ACX BIT(22) /* AC excitation enable(AD7195 only) */
#define AD7192_CONF_REFSEL BIT(20) /* REFIN1/REFIN2 Reference Select */
#define AD7192_CONF_CHAN(x) ((x) << 8) /* Channel select */
#define AD7192_CONF_CHAN_MASK (0x7FF << 8) /* Channel select mask */
#define AD7192_CONF_CHAN_MASK GENMASK(18, 8) /* Channel select mask */
#define AD7192_CONF_BURN BIT(7) /* Burnout current enable */
#define AD7192_CONF_REFDET BIT(6) /* Reference detect enable */
#define AD7192_CONF_BUF BIT(4) /* Buffered Mode Enable */
#define AD7192_CONF_UNIPOLAR BIT(3) /* Unipolar/Bipolar Enable */
#define AD7192_CONF_GAIN(x) ((x) & 0x7) /* Gain Select */
#define AD7192_CONF_GAIN_MASK GENMASK(2, 0) /* Gain Select */
#define AD7192_CH_AIN1P_AIN2M BIT(0) /* AIN1(+) - AIN2(-) */
#define AD7192_CH_AIN3P_AIN4M BIT(1) /* AIN3(+) - AIN4(-) */
......@@ -130,7 +129,7 @@
#define CHIPID_AD7192 0x0
#define CHIPID_AD7193 0x2
#define CHIPID_AD7195 0x6
#define AD7192_ID_MASK 0x0F
#define AD7192_ID_MASK GENMASK(3, 0)
/* GPOCON Register Bit Designations (AD7192_REG_GPOCON) */
#define AD7192_GPOCON_BPDSW BIT(6) /* Bridge power-down switch enable */
......@@ -272,7 +271,7 @@ static int ad7192_set_channel(struct ad_sigma_delta *sd, unsigned int channel)
struct ad7192_state *st = ad_sigma_delta_to_ad7192(sd);
st->conf &= ~AD7192_CONF_CHAN_MASK;
st->conf |= AD7192_CONF_CHAN(channel);
st->conf |= FIELD_PREP(AD7192_CONF_CHAN_MASK, channel);
return ad_sd_write_reg(&st->sd, AD7192_REG_CONF, 3, st->conf);
}
......@@ -283,7 +282,7 @@ static int ad7192_set_mode(struct ad_sigma_delta *sd,
struct ad7192_state *st = ad_sigma_delta_to_ad7192(sd);
st->mode &= ~AD7192_MODE_SEL_MASK;
st->mode |= AD7192_MODE_SEL(mode);
st->mode |= FIELD_PREP(AD7192_MODE_SEL_MASK, mode);
return ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, st->mode);
}
......@@ -295,7 +294,7 @@ static int ad7192_append_status(struct ad_sigma_delta *sd, bool append)
int ret;
mode &= ~AD7192_MODE_STA_MASK;
mode |= AD7192_MODE_STA(append);
mode |= FIELD_PREP(AD7192_MODE_STA_MASK, append);
ret = ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, mode);
if (ret < 0)
......@@ -399,17 +398,17 @@ static int ad7192_setup(struct iio_dev *indio_dev, struct device_node *np)
if (ret)
return ret;
id &= AD7192_ID_MASK;
id = FIELD_GET(AD7192_ID_MASK, id);
if (id != st->chip_info->chip_id)
dev_warn(&st->sd.spi->dev, "device ID query failed (0x%X != 0x%X)\n",
id, st->chip_info->chip_id);
st->mode = AD7192_MODE_SEL(AD7192_MODE_IDLE) |
AD7192_MODE_CLKSRC(st->clock_sel) |
AD7192_MODE_RATE(480);
st->mode = FIELD_PREP(AD7192_MODE_SEL_MASK, AD7192_MODE_IDLE) |
FIELD_PREP(AD7192_MODE_CLKSRC_MASK, st->clock_sel) |
FIELD_PREP(AD7192_MODE_RATE_MASK, 480);
st->conf = AD7192_CONF_GAIN(0);
st->conf = FIELD_PREP(AD7192_CONF_GAIN_MASK, 0);
rej60_en = of_property_read_bool(np, "adi,rejection-60-Hz-enable");
if (rej60_en)
......@@ -455,7 +454,7 @@ static int ad7192_setup(struct iio_dev *indio_dev, struct device_node *np)
for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) {
scale_uv = ((u64)st->int_vref_mv * 100000000)
>> (indio_dev->channels[0].scan_type.realbits -
((st->conf & AD7192_CONF_UNIPOLAR) ? 0 : 1));
!FIELD_GET(AD7192_CONF_UNIPOLAR, st->conf));
scale_uv >>= i;
st->scale_avail[i][1] = do_div(scale_uv, 100000000) * 10;
......@@ -472,7 +471,7 @@ static ssize_t ad7192_show_ac_excitation(struct device *dev,
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ad7192_state *st = iio_priv(indio_dev);
return sysfs_emit(buf, "%d\n", !!(st->conf & AD7192_CONF_ACX));
return sysfs_emit(buf, "%ld\n", FIELD_GET(AD7192_CONF_ACX, st->conf));
}
static ssize_t ad7192_show_bridge_switch(struct device *dev,
......@@ -482,7 +481,8 @@ static ssize_t ad7192_show_bridge_switch(struct device *dev,
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ad7192_state *st = iio_priv(indio_dev);
return sysfs_emit(buf, "%d\n", !!(st->gpocon & AD7192_GPOCON_BPDSW));
return sysfs_emit(buf, "%ld\n",
FIELD_GET(AD7192_GPOCON_BPDSW, st->gpocon));
}
static ssize_t ad7192_set(struct device *dev,
......@@ -537,14 +537,14 @@ static void ad7192_get_available_filter_freq(struct ad7192_state *st,
/* Formulas for filter at page 25 of the datasheet */
fadc = DIV_ROUND_CLOSEST(st->fclk,
AD7192_SYNC4_FILTER * AD7192_MODE_RATE(st->mode));
AD7192_SYNC4_FILTER * FIELD_GET(AD7192_MODE_RATE_MASK, st->mode));
freq[0] = DIV_ROUND_CLOSEST(fadc * 240, 1024);
fadc = DIV_ROUND_CLOSEST(st->fclk,
AD7192_SYNC3_FILTER * AD7192_MODE_RATE(st->mode));
AD7192_SYNC3_FILTER * FIELD_GET(AD7192_MODE_RATE_MASK, st->mode));
freq[1] = DIV_ROUND_CLOSEST(fadc * 240, 1024);
fadc = DIV_ROUND_CLOSEST(st->fclk, AD7192_MODE_RATE(st->mode));
fadc = DIV_ROUND_CLOSEST(st->fclk, FIELD_GET(AD7192_MODE_RATE_MASK, st->mode));
freq[2] = DIV_ROUND_CLOSEST(fadc * 230, 1024);
freq[3] = DIV_ROUND_CLOSEST(fadc * 272, 1024);
}
......@@ -665,11 +665,11 @@ static int ad7192_get_3db_filter_freq(struct ad7192_state *st)
unsigned int fadc;
fadc = DIV_ROUND_CLOSEST(st->fclk,
st->f_order * AD7192_MODE_RATE(st->mode));
st->f_order * FIELD_GET(AD7192_MODE_RATE_MASK, st->mode));
if (st->conf & AD7192_CONF_CHOP)
if (FIELD_GET(AD7192_CONF_CHOP, st->conf))
return DIV_ROUND_CLOSEST(fadc * 240, 1024);
if (st->mode & AD7192_MODE_SINC3)
if (FIELD_GET(AD7192_MODE_SINC3, st->mode))
return DIV_ROUND_CLOSEST(fadc * 272, 1024);
else
return DIV_ROUND_CLOSEST(fadc * 230, 1024);
......@@ -682,7 +682,8 @@ static int ad7192_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad7192_state *st = iio_priv(indio_dev);
bool unipolar = !!(st->conf & AD7192_CONF_UNIPOLAR);
bool unipolar = FIELD_GET(AD7192_CONF_UNIPOLAR, st->conf);
u8 gain = FIELD_GET(AD7192_CONF_GAIN_MASK, st->conf);
switch (m) {
case IIO_CHAN_INFO_RAW:
......@@ -691,8 +692,8 @@ static int ad7192_read_raw(struct iio_dev *indio_dev,
switch (chan->type) {
case IIO_VOLTAGE:
mutex_lock(&st->lock);
*val = st->scale_avail[AD7192_CONF_GAIN(st->conf)][0];
*val2 = st->scale_avail[AD7192_CONF_GAIN(st->conf)][1];
*val = st->scale_avail[gain][0];
*val2 = st->scale_avail[gain][1];
mutex_unlock(&st->lock);
return IIO_VAL_INT_PLUS_NANO;
case IIO_TEMP:
......@@ -713,7 +714,7 @@ static int ad7192_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SAMP_FREQ:
*val = st->fclk /
(st->f_order * 1024 * AD7192_MODE_RATE(st->mode));
(st->f_order * 1024 * FIELD_GET(AD7192_MODE_RATE_MASK, st->mode));
return IIO_VAL_INT;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
*val = ad7192_get_3db_filter_freq(st);
......@@ -746,8 +747,8 @@ static int ad7192_write_raw(struct iio_dev *indio_dev,
if (val2 == st->scale_avail[i][1]) {
ret = 0;
tmp = st->conf;
st->conf &= ~AD7192_CONF_GAIN(-1);
st->conf |= AD7192_CONF_GAIN(i);
st->conf &= ~AD7192_CONF_GAIN_MASK;
st->conf |= FIELD_PREP(AD7192_CONF_GAIN_MASK, i);
if (tmp == st->conf)
break;
ad_sd_write_reg(&st->sd, AD7192_REG_CONF,
......@@ -769,8 +770,8 @@ static int ad7192_write_raw(struct iio_dev *indio_dev,
break;
}
st->mode &= ~AD7192_MODE_RATE(-1);
st->mode |= AD7192_MODE_RATE(div);
st->mode &= ~AD7192_MODE_RATE_MASK;
st->mode |= FIELD_PREP(AD7192_MODE_RATE_MASK, div);
ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, st->mode);
break;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
......@@ -830,7 +831,7 @@ static int ad7192_update_scan_mode(struct iio_dev *indio_dev, const unsigned lon
conf &= ~AD7192_CONF_CHAN_MASK;
for_each_set_bit(i, scan_mask, 8)
conf |= AD7192_CONF_CHAN(i);
conf |= FIELD_PREP(AD7192_CONF_CHAN_MASK, i);
ret = ad_sd_write_reg(&st->sd, AD7192_REG_CONF, 3, conf);
if (ret < 0)
......
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