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Subject[PATCH 2/5 V2] staging: iio: adc: ad7192: modify iio_chan_spec array
Date
This patch changes the static const struct iio_chan_spec arrays
in a way that all the necessary attributes are set at
compile time. Now ad7192_channels_config only makes the
channels attribute of iio_dev point to the right array depending
on the chip.

Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
---
drivers/staging/iio/adc/ad7192.c | 112 ++++++++++++++++++-------------
1 file changed, 66 insertions(+), 46 deletions(-)

diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c
index 4780ddf99b13..8f2fa154876a 100644
--- a/drivers/staging/iio/adc/ad7192.c
+++ b/drivers/staging/iio/adc/ad7192.c
@@ -786,73 +786,93 @@ static const struct iio_info ad7195_info = {
.validate_trigger = ad_sd_validate_trigger,
};

+#define __AD719x_CHANNEL(_si, _channel1, _channel2, _address, _extend_name, \
+ _type, _mask_type_av, _ext_info) \
+ { \
+ .type = (_type), \
+ .differential = ((_channel2) == -1 ? 0 : 1), \
+ .indexed = 1, \
+ .channel = (_channel1), \
+ .channel2 = (_channel2), \
+ .address = (_address), \
+ .extend_name = (_extend_name), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ .info_mask_shared_by_type_available = (_mask_type_av), \
+ .ext_info = (_ext_info), \
+ .scan_index = (_si), \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 24, \
+ .storagebits = 32, \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+#define AD719x_DIFF_CHANNEL(_si, _channel1, _channel2, _address) \
+ __AD719x_CHANNEL(_si, _channel1, _channel2, _address, NULL, \
+ IIO_VOLTAGE, BIT(IIO_CHAN_INFO_SCALE), \
+ ad7192_calibsys_ext_info)
+
+#define AD719x_CHANNEL(_si, _channel1, _address) \
+ __AD719x_CHANNEL(_si, _channel1, -1, _address, NULL, IIO_VOLTAGE, \
+ BIT(IIO_CHAN_INFO_SCALE), ad7192_calibsys_ext_info)
+
+#define AD719x_SHORTED_CHANNEL(_si, _channel1, _address) \
+ __AD719x_CHANNEL(_si, _channel1, -1, _address, "shorted", IIO_VOLTAGE, \
+ BIT(IIO_CHAN_INFO_SCALE), ad7192_calibsys_ext_info)
+
+#define AD719x_TEMP_CHANNEL(_si, _address) \
+ __AD719x_CHANNEL(_si, 0, -1, _address, NULL, IIO_TEMP, 0, NULL)
+
static const struct iio_chan_spec ad7192_channels[] = {
- AD_SD_DIFF_CHANNEL(0, 1, 2, AD7192_CH_AIN1P_AIN2M, 24, 32, 0),
- AD_SD_DIFF_CHANNEL(1, 3, 4, AD7192_CH_AIN3P_AIN4M, 24, 32, 0),
- AD_SD_TEMP_CHANNEL(2, AD7192_CH_TEMP, 24, 32, 0),
- AD_SD_SHORTED_CHANNEL(3, 2, AD7192_CH_AIN2P_AIN2M, 24, 32, 0),
- AD_SD_CHANNEL(4, 1, AD7192_CH_AIN1, 24, 32, 0),
- AD_SD_CHANNEL(5, 2, AD7192_CH_AIN2, 24, 32, 0),
- AD_SD_CHANNEL(6, 3, AD7192_CH_AIN3, 24, 32, 0),
- AD_SD_CHANNEL(7, 4, AD7192_CH_AIN4, 24, 32, 0),
+ AD719x_DIFF_CHANNEL(0, 1, 2, AD7192_CH_AIN1P_AIN2M),
+ AD719x_DIFF_CHANNEL(1, 3, 4, AD7192_CH_AIN3P_AIN4M),
+ AD719x_TEMP_CHANNEL(2, AD7192_CH_TEMP),
+ AD719x_SHORTED_CHANNEL(3, 2, AD7192_CH_AIN2P_AIN2M),
+ AD719x_CHANNEL(4, 1, AD7192_CH_AIN1),
+ AD719x_CHANNEL(5, 2, AD7192_CH_AIN2),
+ AD719x_CHANNEL(6, 3, AD7192_CH_AIN3),
+ AD719x_CHANNEL(7, 4, AD7192_CH_AIN4),
IIO_CHAN_SOFT_TIMESTAMP(8),
};

static const struct iio_chan_spec ad7193_channels[] = {
- AD_SD_DIFF_CHANNEL(0, 1, 2, AD7193_CH_AIN1P_AIN2M, 24, 32, 0),
- AD_SD_DIFF_CHANNEL(1, 3, 4, AD7193_CH_AIN3P_AIN4M, 24, 32, 0),
- AD_SD_DIFF_CHANNEL(2, 5, 6, AD7193_CH_AIN5P_AIN6M, 24, 32, 0),
- AD_SD_DIFF_CHANNEL(3, 7, 8, AD7193_CH_AIN7P_AIN8M, 24, 32, 0),
- AD_SD_TEMP_CHANNEL(4, AD7193_CH_TEMP, 24, 32, 0),
- AD_SD_SHORTED_CHANNEL(5, 2, AD7193_CH_AIN2P_AIN2M, 24, 32, 0),
- AD_SD_CHANNEL(6, 1, AD7193_CH_AIN1, 24, 32, 0),
- AD_SD_CHANNEL(7, 2, AD7193_CH_AIN2, 24, 32, 0),
- AD_SD_CHANNEL(8, 3, AD7193_CH_AIN3, 24, 32, 0),
- AD_SD_CHANNEL(9, 4, AD7193_CH_AIN4, 24, 32, 0),
- AD_SD_CHANNEL(10, 5, AD7193_CH_AIN5, 24, 32, 0),
- AD_SD_CHANNEL(11, 6, AD7193_CH_AIN6, 24, 32, 0),
- AD_SD_CHANNEL(12, 7, AD7193_CH_AIN7, 24, 32, 0),
- AD_SD_CHANNEL(13, 8, AD7193_CH_AIN8, 24, 32, 0),
+ AD719x_DIFF_CHANNEL(0, 1, 2, AD7193_CH_AIN1P_AIN2M),
+ AD719x_DIFF_CHANNEL(1, 3, 4, AD7193_CH_AIN3P_AIN4M),
+ AD719x_DIFF_CHANNEL(2, 5, 6, AD7193_CH_AIN5P_AIN6M),
+ AD719x_DIFF_CHANNEL(3, 7, 8, AD7193_CH_AIN7P_AIN8M),
+ AD719x_TEMP_CHANNEL(4, AD7193_CH_TEMP),
+ AD719x_SHORTED_CHANNEL(5, 2, AD7193_CH_AIN2P_AIN2M),
+ AD719x_CHANNEL(6, 1, AD7193_CH_AIN1),
+ AD719x_CHANNEL(7, 2, AD7193_CH_AIN2),
+ AD719x_CHANNEL(8, 3, AD7193_CH_AIN3),
+ AD719x_CHANNEL(9, 4, AD7193_CH_AIN4),
+ AD719x_CHANNEL(10, 5, AD7193_CH_AIN5),
+ AD719x_CHANNEL(11, 6, AD7193_CH_AIN6),
+ AD719x_CHANNEL(12, 7, AD7193_CH_AIN7),
+ AD719x_CHANNEL(13, 8, AD7193_CH_AIN8),
IIO_CHAN_SOFT_TIMESTAMP(14),
};

static int ad7192_channels_config(struct iio_dev *indio_dev)
{
struct ad7192_state *st = iio_priv(indio_dev);
- const struct iio_chan_spec *channels;
- struct iio_chan_spec *chan;
- int i;

switch (st->devid) {
case ID_AD7193:
- channels = ad7193_channels;
+ indio_dev->channels = ad7193_channels;
indio_dev->num_channels = ARRAY_SIZE(ad7193_channels);
break;
default:
- channels = ad7192_channels;
+ indio_dev->channels = ad7192_channels;
indio_dev->num_channels = ARRAY_SIZE(ad7192_channels);
break;
}

- chan = devm_kcalloc(indio_dev->dev.parent, indio_dev->num_channels,
- sizeof(*chan), GFP_KERNEL);
- if (!chan)
- return -ENOMEM;
-
- indio_dev->channels = chan;
-
- for (i = 0; i < indio_dev->num_channels; i++) {
- *chan = channels[i];
- chan->info_mask_shared_by_all |=
- BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY);
- if (chan->type != IIO_TEMP) {
- chan->info_mask_shared_by_type_available |=
- BIT(IIO_CHAN_INFO_SCALE);
- chan->ext_info = ad7192_calibsys_ext_info;
- }
- chan++;
- }
-
return 0;
}

--
2.20.1
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