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Date: Tue, 19 Sep 2023 00:48:52 +0300
From: alisadariana@...il.com
To: unlisted-recipients:; (no To-header on input)
Cc: Alisa-Dariana Roman <alisadariana@...il.com>,
Alisa-Dariana Roman <alisa.roman@...log.com>,
Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Alexandru Tachici <alexandru.tachici@...log.com>,
Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] iio: adc: ad7192: Use bitfield access macros
From: Alisa-Dariana Roman <alisadariana@...il.com>
Include bitfield.h and update driver to use bitfield access macros
GENMASK, FIELD_PREP and FIELD_GET.
Also simplify AD7192_CONF_GAIN(-1) to AD7192_CONF_GAIN_MASK and
AD7192_MODE_RATE(-1) to AD7192_MODE_RATE_MASK.
Signed-off-by: Alisa-Dariana Roman <alisa.roman@...log.com>
---
drivers/iio/adc/ad7192.c | 50 +++++++++++++++++++++++++---------------
1 file changed, 32 insertions(+), 18 deletions(-)
diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 69d1103b9508..e83fecb63c1d 100644
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -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 +44,9 @@
#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_ADDR(x) FIELD_PREP(AD7192_COMM_ADDR_MASK, x)
+ /* Register Address */
#define AD7192_COMM_CREAD BIT(2) /* Continuous Read of Data Register */
/* Status Register Bit Designations (AD7192_REG_STAT) */
@@ -56,17 +59,24 @@
#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_SEL(x) FIELD_PREP(AD7192_MODE_SEL_MASK, x)
+ /* Operation Mode Select */
#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_STA(x) FIELD_PREP(AD7192_MODE_STA_MASK, x)
+ /* Status Register transmission */
+#define AD7192_MODE_CLKSRC_MASK GENMASK(19, 18) /* Clock Source Select Mask */
+#define AD7192_MODE_CLKSRC(x) FIELD_PREP(AD7192_MODE_CLKSRC_MASK, x)
+ /* Clock Source Select */
#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 */
+#define AD7192_MODE_RATE_MASK GENMASK(9, 0)
+ /* Filter Update Rate Select Mask */
+#define AD7192_MODE_RATE(x) FIELD_PREP(AD7192_MODE_RATE_MASK, x)
+ /* Filter Update Rate Select */
/* Mode Register: AD7192_MODE_SEL options */
#define AD7192_MODE_CONT 0 /* Continuous Conversion Mode */
@@ -92,13 +102,16 @@
#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_CHAN(x) FIELD_PREP(AD7192_CONF_CHAN_MASK, x)
+ /* Channel select */
#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_CONF_GAIN(x) FIELD_PREP(AD7192_CONF_GAIN_MASK, x)
+ /* Gain Select */
#define AD7192_CH_AIN1P_AIN2M BIT(0) /* AIN1(+) - AIN2(-) */
#define AD7192_CH_AIN3P_AIN4M BIT(1) /* AIN3(+) - AIN4(-) */
@@ -130,7 +143,7 @@
#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 */
@@ -399,7 +412,7 @@ 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",
@@ -472,7 +485,7 @@ 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, "%d\n", !!FIELD_GET(AD7192_CONF_ACX, st->conf));
}
static ssize_t ad7192_show_bridge_switch(struct device *dev,
@@ -482,7 +495,8 @@ 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, "%d\n",
+ !!FIELD_GET(AD7192_GPOCON_BPDSW, st->gpocon));
}
static ssize_t ad7192_set(struct device *dev,
@@ -667,9 +681,9 @@ static int ad7192_get_3db_filter_freq(struct ad7192_state *st)
fadc = DIV_ROUND_CLOSEST(st->fclk,
st->f_order * AD7192_MODE_RATE(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 +696,7 @@ 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);
switch (m) {
case IIO_CHAN_INFO_RAW:
@@ -746,7 +760,7 @@ 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_MASK;
st->conf |= AD7192_CONF_GAIN(i);
if (tmp == st->conf)
break;
@@ -769,7 +783,7 @@ static int ad7192_write_raw(struct iio_dev *indio_dev,
break;
}
- st->mode &= ~AD7192_MODE_RATE(-1);
+ st->mode &= ~AD7192_MODE_RATE_MASK;
st->mode |= AD7192_MODE_RATE(div);
ad_sd_write_reg(&st->sd, AD7192_REG_MODE, 3, st->mode);
break;
--
2.34.1
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