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path: root/drivers/iio/adc/ad7124.c
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Diffstat (limited to 'drivers/iio/adc/ad7124.c')
-rw-r--r--drivers/iio/adc/ad7124.c210
1 files changed, 85 insertions, 125 deletions
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index 3ea81a98e455..92596f15e797 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -32,7 +32,7 @@
#define AD7124_IO_CONTROL_2 0x04
#define AD7124_ID 0x05
#define AD7124_ERROR 0x06
-#define AD7124_ERROR_EN 0x07
+#define AD7124_ERROR_EN 0x07
#define AD7124_MCLK_COUNT 0x08
#define AD7124_CHANNEL(x) (0x09 + (x))
#define AD7124_CONFIG(x) (0x19 + (x))
@@ -41,68 +41,58 @@
#define AD7124_GAIN(x) (0x31 + (x))
/* AD7124_STATUS */
-#define AD7124_STATUS_POR_FLAG_MSK BIT(4)
+#define AD7124_STATUS_POR_FLAG BIT(4)
/* AD7124_ADC_CONTROL */
-#define AD7124_ADC_STATUS_EN_MSK BIT(10)
-#define AD7124_ADC_STATUS_EN(x) FIELD_PREP(AD7124_ADC_STATUS_EN_MSK, x)
-#define AD7124_ADC_CTRL_REF_EN_MSK BIT(8)
-#define AD7124_ADC_CTRL_REF_EN(x) FIELD_PREP(AD7124_ADC_CTRL_REF_EN_MSK, x)
-#define AD7124_ADC_CTRL_PWR_MSK GENMASK(7, 6)
-#define AD7124_ADC_CTRL_PWR(x) FIELD_PREP(AD7124_ADC_CTRL_PWR_MSK, x)
-#define AD7124_ADC_CTRL_MODE_MSK GENMASK(5, 2)
-#define AD7124_ADC_CTRL_MODE(x) FIELD_PREP(AD7124_ADC_CTRL_MODE_MSK, x)
-
-#define AD7124_MODE_CAL_INT_ZERO 0x5 /* Internal Zero-Scale Calibration */
-#define AD7124_MODE_CAL_INT_FULL 0x6 /* Internal Full-Scale Calibration */
-#define AD7124_MODE_CAL_SYS_ZERO 0x7 /* System Zero-Scale Calibration */
-#define AD7124_MODE_CAL_SYS_FULL 0x8 /* System Full-Scale Calibration */
-
-/* AD7124 ID */
-#define AD7124_DEVICE_ID_MSK GENMASK(7, 4)
-#define AD7124_DEVICE_ID_GET(x) FIELD_GET(AD7124_DEVICE_ID_MSK, x)
-#define AD7124_SILICON_REV_MSK GENMASK(3, 0)
-#define AD7124_SILICON_REV_GET(x) FIELD_GET(AD7124_SILICON_REV_MSK, x)
-
-#define CHIPID_AD7124_4 0x0
-#define CHIPID_AD7124_8 0x1
+#define AD7124_ADC_CONTROL_MODE GENMASK(5, 2)
+#define AD7124_ADC_CONTROL_MODE_CONTINUOUS 0
+#define AD7124_ADC_CONTROL_MODE_SINGLE 1
+#define AD7124_ADC_CONTROL_MODE_STANDBY 2
+#define AD7124_ADC_CONTROL_MODE_POWERDOWN 3
+#define AD7124_ADC_CONTROL_MODE_IDLE 4
+#define AD7124_ADC_CONTROL_MODE_INT_OFFSET_CALIB 5 /* Internal Zero-Scale Calibration */
+#define AD7124_ADC_CONTROL_MODE_INT_GAIN_CALIB 6 /* Internal Full-Scale Calibration */
+#define AD7124_ADC_CONTROL_MODE_SYS_OFFSET_CALIB 7 /* System Zero-Scale Calibration */
+#define AD7124_ADC_CONTROL_MODE_SYS_GAIN_CALIB 8 /* System Full-Scale Calibration */
+#define AD7124_ADC_CONTROL_POWER_MODE GENMASK(7, 6)
+#define AD7124_ADC_CONTROL_POWER_MODE_LOW 0
+#define AD7124_ADC_CONTROL_POWER_MODE_MID 1
+#define AD7124_ADC_CONTROL_POWER_MODE_FULL 2
+#define AD7124_ADC_CONTROL_REF_EN BIT(8)
+#define AD7124_ADC_CONTROL_DATA_STATUS BIT(10)
+
+/* AD7124_ID */
+#define AD7124_ID_SILICON_REVISION GENMASK(3, 0)
+#define AD7124_ID_DEVICE_ID GENMASK(7, 4)
+#define AD7124_ID_DEVICE_ID_AD7124_4 0x0
+#define AD7124_ID_DEVICE_ID_AD7124_8 0x1
/* AD7124_CHANNEL_X */
-#define AD7124_CHANNEL_EN_MSK BIT(15)
-#define AD7124_CHANNEL_EN(x) FIELD_PREP(AD7124_CHANNEL_EN_MSK, x)
-#define AD7124_CHANNEL_SETUP_MSK GENMASK(14, 12)
-#define AD7124_CHANNEL_SETUP(x) FIELD_PREP(AD7124_CHANNEL_SETUP_MSK, x)
-#define AD7124_CHANNEL_AINP_MSK GENMASK(9, 5)
-#define AD7124_CHANNEL_AINP(x) FIELD_PREP(AD7124_CHANNEL_AINP_MSK, x)
-#define AD7124_CHANNEL_AINM_MSK GENMASK(4, 0)
-#define AD7124_CHANNEL_AINM(x) FIELD_PREP(AD7124_CHANNEL_AINM_MSK, x)
+#define AD7124_CHANNEL_ENABLE BIT(15)
+#define AD7124_CHANNEL_SETUP GENMASK(14, 12)
+#define AD7124_CHANNEL_AINP GENMASK(9, 5)
+#define AD7124_CHANNEL_AINM GENMASK(4, 0)
+#define AD7124_CHANNEL_AINx_TEMPSENSOR 16
+#define AD7124_CHANNEL_AINx_AVSS 17
/* AD7124_CONFIG_X */
-#define AD7124_CONFIG_BIPOLAR_MSK BIT(11)
-#define AD7124_CONFIG_BIPOLAR(x) FIELD_PREP(AD7124_CONFIG_BIPOLAR_MSK, x)
-#define AD7124_CONFIG_REF_SEL_MSK GENMASK(4, 3)
-#define AD7124_CONFIG_REF_SEL(x) FIELD_PREP(AD7124_CONFIG_REF_SEL_MSK, x)
-#define AD7124_CONFIG_PGA_MSK GENMASK(2, 0)
-#define AD7124_CONFIG_PGA(x) FIELD_PREP(AD7124_CONFIG_PGA_MSK, x)
-#define AD7124_CONFIG_IN_BUFF_MSK GENMASK(6, 5)
-#define AD7124_CONFIG_IN_BUFF(x) FIELD_PREP(AD7124_CONFIG_IN_BUFF_MSK, x)
+#define AD7124_CONFIG_BIPOLAR BIT(11)
+#define AD7124_CONFIG_IN_BUFF GENMASK(6, 5)
+#define AD7124_CONFIG_AIN_BUFP BIT(6)
+#define AD7124_CONFIG_AIN_BUFM BIT(5)
+#define AD7124_CONFIG_REF_SEL GENMASK(4, 3)
+#define AD7124_CONFIG_PGA GENMASK(2, 0)
/* AD7124_FILTER_X */
-#define AD7124_FILTER_FS_MSK GENMASK(10, 0)
-#define AD7124_FILTER_FS(x) FIELD_PREP(AD7124_FILTER_FS_MSK, x)
-#define AD7124_FILTER_TYPE_MSK GENMASK(23, 21)
-#define AD7124_FILTER_TYPE_SEL(x) FIELD_PREP(AD7124_FILTER_TYPE_MSK, x)
+#define AD7124_FILTER_FS GENMASK(10, 0)
+#define AD7124_FILTER_FILTER GENMASK(23, 21)
+#define AD7124_FILTER_FILTER_SINC4 0
+#define AD7124_FILTER_FILTER_SINC3 2
-#define AD7124_SINC3_FILTER 2
-#define AD7124_SINC4_FILTER 0
-
-#define AD7124_CONF_ADDR_OFFSET 20
#define AD7124_MAX_CONFIGS 8
#define AD7124_MAX_CHANNELS 16
/* AD7124 input sources */
-#define AD7124_INPUT_TEMPSENSOR 16
-#define AD7124_INPUT_AVSS 17
enum ad7124_ids {
ID_AD7124_4,
@@ -206,12 +196,12 @@ struct ad7124_state {
static struct ad7124_chip_info ad7124_chip_info_tbl[] = {
[ID_AD7124_4] = {
.name = "ad7124-4",
- .chip_id = CHIPID_AD7124_4,
+ .chip_id = AD7124_ID_DEVICE_ID_AD7124_4,
.num_inputs = 8,
},
[ID_AD7124_8] = {
.name = "ad7124-8",
- .chip_id = CHIPID_AD7124_8,
+ .chip_id = AD7124_ID_DEVICE_ID_AD7124_8,
.num_inputs = 16,
},
};
@@ -260,8 +250,8 @@ static int ad7124_set_mode(struct ad_sigma_delta *sd,
{
struct ad7124_state *st = container_of(sd, struct ad7124_state, sd);
- st->adc_control &= ~AD7124_ADC_CTRL_MODE_MSK;
- st->adc_control |= AD7124_ADC_CTRL_MODE(mode);
+ st->adc_control &= ~AD7124_ADC_CONTROL_MODE;
+ st->adc_control |= FIELD_PREP(AD7124_ADC_CONTROL_MODE, mode);
return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, st->adc_control);
}
@@ -300,41 +290,15 @@ static int ad7124_get_3db_filter_freq(struct ad7124_state *st,
fadc = st->channels[channel].cfg.odr;
switch (st->channels[channel].cfg.filter_type) {
- case AD7124_SINC3_FILTER:
+ case AD7124_FILTER_FILTER_SINC3:
+ return DIV_ROUND_CLOSEST(fadc * 272, 1000);
+ case AD7124_FILTER_FILTER_SINC4:
return DIV_ROUND_CLOSEST(fadc * 230, 1000);
- case AD7124_SINC4_FILTER:
- return DIV_ROUND_CLOSEST(fadc * 262, 1000);
default:
return -EINVAL;
}
}
-static void ad7124_set_3db_filter_freq(struct ad7124_state *st, unsigned int channel,
- unsigned int freq)
-{
- unsigned int sinc4_3db_odr;
- unsigned int sinc3_3db_odr;
- unsigned int new_filter;
- unsigned int new_odr;
-
- sinc4_3db_odr = DIV_ROUND_CLOSEST(freq * 1000, 230);
- sinc3_3db_odr = DIV_ROUND_CLOSEST(freq * 1000, 262);
-
- if (sinc4_3db_odr > sinc3_3db_odr) {
- new_filter = AD7124_SINC3_FILTER;
- new_odr = sinc4_3db_odr;
- } else {
- new_filter = AD7124_SINC4_FILTER;
- new_odr = sinc3_3db_odr;
- }
-
- if (new_odr != st->channels[channel].cfg.odr)
- st->channels[channel].cfg.live = false;
-
- st->channels[channel].cfg.filter_type = new_filter;
- st->channels[channel].cfg.odr = new_odr;
-}
-
static struct ad7124_channel_config *ad7124_find_similar_live_cfg(struct ad7124_state *st,
struct ad7124_channel_config *cfg)
{
@@ -413,8 +377,7 @@ static int ad7124_init_config_vref(struct ad7124_state *st, struct ad7124_channe
return 0;
case AD7124_INT_REF:
cfg->vref_mv = 2500;
- st->adc_control &= ~AD7124_ADC_CTRL_REF_EN_MSK;
- st->adc_control |= AD7124_ADC_CTRL_REF_EN(1);
+ st->adc_control |= AD7124_ADC_CONTROL_REF_EN;
return 0;
default:
return dev_err_probe(dev, -EINVAL, "Invalid reference %d\n", refsel);
@@ -438,18 +401,20 @@ static int ad7124_write_config(struct ad7124_state *st, struct ad7124_channel_co
if (ret)
return ret;
- tmp = (cfg->buf_positive << 1) + cfg->buf_negative;
- val = AD7124_CONFIG_BIPOLAR(cfg->bipolar) | AD7124_CONFIG_REF_SEL(cfg->refsel) |
- AD7124_CONFIG_IN_BUFF(tmp) | AD7124_CONFIG_PGA(cfg->pga_bits);
+ val = FIELD_PREP(AD7124_CONFIG_BIPOLAR, cfg->bipolar) |
+ FIELD_PREP(AD7124_CONFIG_REF_SEL, cfg->refsel) |
+ (cfg->buf_positive ? AD7124_CONFIG_AIN_BUFP : 0) |
+ (cfg->buf_negative ? AD7124_CONFIG_AIN_BUFM : 0) |
+ FIELD_PREP(AD7124_CONFIG_PGA, cfg->pga_bits);
ret = ad_sd_write_reg(&st->sd, AD7124_CONFIG(cfg->cfg_slot), 2, val);
if (ret < 0)
return ret;
- tmp = AD7124_FILTER_TYPE_SEL(cfg->filter_type) |
- AD7124_FILTER_FS(cfg->odr_sel_bits);
+ tmp = FIELD_PREP(AD7124_FILTER_FILTER, cfg->filter_type) |
+ FIELD_PREP(AD7124_FILTER_FS, cfg->odr_sel_bits);
return ad7124_spi_write_mask(st, AD7124_FILTER(cfg->cfg_slot),
- AD7124_FILTER_TYPE_MSK | AD7124_FILTER_FS_MSK,
+ AD7124_FILTER_FILTER | AD7124_FILTER_FS,
tmp, 3);
}
@@ -514,7 +479,8 @@ static int ad7124_enable_channel(struct ad7124_state *st, struct ad7124_channel
{
ch->cfg.live = true;
return ad_sd_write_reg(&st->sd, AD7124_CHANNEL(ch->nr), 2, ch->ain |
- AD7124_CHANNEL_SETUP(ch->cfg.cfg_slot) | AD7124_CHANNEL_EN(1));
+ FIELD_PREP(AD7124_CHANNEL_SETUP, ch->cfg.cfg_slot) |
+ AD7124_CHANNEL_ENABLE);
}
static int ad7124_prepare_read(struct ad7124_state *st, int address)
@@ -564,8 +530,10 @@ static int ad7124_append_status(struct ad_sigma_delta *sd, bool append)
unsigned int adc_control = st->adc_control;
int ret;
- adc_control &= ~AD7124_ADC_STATUS_EN_MSK;
- adc_control |= AD7124_ADC_STATUS_EN(append);
+ if (append)
+ adc_control |= AD7124_ADC_CONTROL_DATA_STATUS;
+ else
+ adc_control &= ~AD7124_ADC_CONTROL_DATA_STATUS;
ret = ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, adc_control);
if (ret < 0)
@@ -580,7 +548,7 @@ static int ad7124_disable_one(struct ad_sigma_delta *sd, unsigned int chan)
{
struct ad7124_state *st = container_of(sd, struct ad7124_state, sd);
- /* The relevant thing here is that AD7124_CHANNEL_EN_MSK is cleared. */
+ /* The relevant thing here is that AD7124_CHANNEL_ENABLE is cleared. */
return ad_sd_write_reg(&st->sd, AD7124_CHANNEL(chan), 2, 0);
}
@@ -739,16 +707,8 @@ static int ad7124_write_raw(struct iio_dev *indio_dev,
st->channels[chan->address].cfg.pga_bits = res;
break;
- case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
- if (val2 != 0) {
- ret = -EINVAL;
- break;
- }
-
- ad7124_set_3db_filter_freq(st, chan->address, val);
- break;
default:
- ret = -EINVAL;
+ ret = -EINVAL;
}
mutex_unlock(&st->cfgs_lock);
@@ -802,7 +762,7 @@ static int ad7124_update_scan_mode(struct iio_dev *indio_dev,
if (bit_set)
ret = __ad7124_set_channel(&st->sd, i);
else
- ret = ad7124_spi_write_mask(st, AD7124_CHANNEL(i), AD7124_CHANNEL_EN_MSK,
+ ret = ad7124_spi_write_mask(st, AD7124_CHANNEL(i), AD7124_CHANNEL_ENABLE,
0, 2);
if (ret < 0) {
mutex_unlock(&st->cfgs_lock);
@@ -843,14 +803,14 @@ static int ad7124_soft_reset(struct ad7124_state *st)
if (ret < 0)
return dev_err_probe(dev, ret, "Error reading status register\n");
- if (!(readval & AD7124_STATUS_POR_FLAG_MSK))
+ if (!(readval & AD7124_STATUS_POR_FLAG))
break;
/* The AD7124 requires typically 2ms to power up and settle */
usleep_range(100, 2000);
} while (--timeout);
- if (readval & AD7124_STATUS_POR_FLAG_MSK)
+ if (readval & AD7124_STATUS_POR_FLAG)
return dev_err_probe(dev, -EIO, "Soft reset failed\n");
ret = ad_sd_read_reg(&st->sd, AD7124_GAIN(0), 3, &st->gain_default);
@@ -872,8 +832,8 @@ static int ad7124_check_chip_id(struct ad7124_state *st)
if (ret < 0)
return dev_err_probe(dev, ret, "Failure to read ID register\n");
- chip_id = AD7124_DEVICE_ID_GET(readval);
- silicon_rev = AD7124_SILICON_REV_GET(readval);
+ chip_id = FIELD_GET(AD7124_ID_DEVICE_ID, readval);
+ silicon_rev = FIELD_GET(AD7124_ID_SILICON_REVISION, readval);
if (chip_id != st->chip_info->chip_id)
return dev_err_probe(dev, -ENODEV,
@@ -901,7 +861,7 @@ static int ad7124_syscalib_locked(struct ad7124_state *st, const struct iio_chan
if (ch->syscalib_mode == AD7124_SYSCALIB_ZERO_SCALE) {
ch->cfg.calibration_offset = 0x800000;
- ret = ad_sd_calibrate(&st->sd, AD7124_MODE_CAL_SYS_ZERO,
+ ret = ad_sd_calibrate(&st->sd, AD7124_ADC_CONTROL_MODE_SYS_OFFSET_CALIB,
chan->address);
if (ret < 0)
return ret;
@@ -916,7 +876,7 @@ static int ad7124_syscalib_locked(struct ad7124_state *st, const struct iio_chan
} else {
ch->cfg.calibration_gain = st->gain_default;
- ret = ad_sd_calibrate(&st->sd, AD7124_MODE_CAL_SYS_FULL,
+ ret = ad_sd_calibrate(&st->sd, AD7124_ADC_CONTROL_MODE_SYS_GAIN_CALIB,
chan->address);
if (ret < 0)
return ret;
@@ -1031,7 +991,7 @@ static bool ad7124_valid_input_select(unsigned int ain, const struct ad7124_chip
if (ain >= info->num_inputs && ain < 16)
return false;
- return ain <= FIELD_MAX(AD7124_CHANNEL_AINM_MSK);
+ return ain <= FIELD_MAX(AD7124_CHANNEL_AINM);
}
static int ad7124_parse_channel_config(struct iio_dev *indio_dev,
@@ -1096,8 +1056,8 @@ static int ad7124_parse_channel_config(struct iio_dev *indio_dev,
"diff-channels property of %pfwP contains invalid data\n", child);
st->channels[channel].nr = channel;
- st->channels[channel].ain = AD7124_CHANNEL_AINP(ain[0]) |
- AD7124_CHANNEL_AINM(ain[1]);
+ st->channels[channel].ain = FIELD_PREP(AD7124_CHANNEL_AINP, ain[0]) |
+ FIELD_PREP(AD7124_CHANNEL_AINM, ain[1]);
cfg = &st->channels[channel].cfg;
cfg->bipolar = fwnode_property_read_bool(child, "bipolar");
@@ -1123,8 +1083,8 @@ static int ad7124_parse_channel_config(struct iio_dev *indio_dev,
if (num_channels < AD7124_MAX_CHANNELS) {
st->channels[num_channels] = (struct ad7124_channel) {
.nr = num_channels,
- .ain = AD7124_CHANNEL_AINP(AD7124_INPUT_TEMPSENSOR) |
- AD7124_CHANNEL_AINM(AD7124_INPUT_AVSS),
+ .ain = FIELD_PREP(AD7124_CHANNEL_AINP, AD7124_CHANNEL_AINx_TEMPSENSOR) |
+ FIELD_PREP(AD7124_CHANNEL_AINM, AD7124_CHANNEL_AINx_AVSS),
.cfg = {
.bipolar = true,
},
@@ -1175,11 +1135,11 @@ static int ad7124_setup(struct ad7124_state *st)
}
/* Set the power mode */
- st->adc_control &= ~AD7124_ADC_CTRL_PWR_MSK;
- st->adc_control |= AD7124_ADC_CTRL_PWR(power_mode);
+ st->adc_control &= ~AD7124_ADC_CONTROL_POWER_MODE;
+ st->adc_control |= FIELD_PREP(AD7124_ADC_CONTROL_POWER_MODE, power_mode);
- st->adc_control &= ~AD7124_ADC_CTRL_MODE_MSK;
- st->adc_control |= AD7124_ADC_CTRL_MODE(AD_SD_MODE_IDLE);
+ st->adc_control &= ~AD7124_ADC_CONTROL_MODE;
+ st->adc_control |= FIELD_PREP(AD7124_ADC_CONTROL_MODE, AD_SD_MODE_IDLE);
mutex_init(&st->cfgs_lock);
INIT_KFIFO(st->live_cfgs_fifo);
@@ -1233,7 +1193,7 @@ static int __ad7124_calibrate_all(struct ad7124_state *st, struct iio_dev *indio
* usual: first zero-scale then full-scale calibration.
*/
if (st->channels[i].cfg.pga_bits > 0) {
- ret = ad_sd_calibrate(&st->sd, AD7124_MODE_CAL_INT_FULL, i);
+ ret = ad_sd_calibrate(&st->sd, AD7124_ADC_CONTROL_MODE_INT_GAIN_CALIB, i);
if (ret < 0)
return ret;
@@ -1250,7 +1210,7 @@ static int __ad7124_calibrate_all(struct ad7124_state *st, struct iio_dev *indio
return ret;
}
- ret = ad_sd_calibrate(&st->sd, AD7124_MODE_CAL_INT_ZERO, i);
+ ret = ad_sd_calibrate(&st->sd, AD7124_ADC_CONTROL_MODE_INT_OFFSET_CALIB, i);
if (ret < 0)
return ret;
@@ -1279,9 +1239,9 @@ static int ad7124_calibrate_all(struct ad7124_state *st, struct iio_dev *indio_d
* The resulting calibration is then also valid for high-speed, so just
* restore adc_control afterwards.
*/
- if (FIELD_GET(AD7124_ADC_CTRL_PWR_MSK, adc_control) >= AD7124_FULL_POWER) {
- st->adc_control &= ~AD7124_ADC_CTRL_PWR_MSK;
- st->adc_control |= AD7124_ADC_CTRL_PWR(AD7124_MID_POWER);
+ if (FIELD_GET(AD7124_ADC_CONTROL_POWER_MODE, adc_control) >= AD7124_FULL_POWER) {
+ st->adc_control &= ~AD7124_ADC_CONTROL_POWER_MODE;
+ st->adc_control |= FIELD_PREP(AD7124_ADC_CONTROL_POWER_MODE, AD7124_MID_POWER);
}
ret = __ad7124_calibrate_all(st, indio_dev);
generated by cgit (git 2.34.1) at 2025-06-07 18:17:05 +0000