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iio: imu: adis16480: Deal with filter freq in a generic way 

When setting the filter frequency, the driver looks into the
adis16480_def_filter_freqs table for the best match. Pass this table to
the chip_info struct since future devices will need to use a different
table.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Stefan Popa 2019-02-27 18:14:26 +02:00 committed by Jonathan Cameron
parent e0e6398e1e
commit 83ec2d5404
1 changed files with 9 additions and 4 deletions
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13
drivers/iio/imu/adis16480.c
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@ -127,6 +127,7 @@ struct adis16480_chip_info {
unsigned int temp_scale;
unsigned int int_clk;
unsigned int max_dec_rate;
const unsigned int *filter_freqs;
};
enum adis16480_int_pin {
@ -483,7 +484,7 @@ static int adis16480_get_filter_freq(struct iio_dev *indio_dev,
if (!(val & enable_mask))
*freq = 0;
else
*freq = adis16480_def_filter_freqs[(val >> offset) & 0x3];
*freq = st->chip_info->filter_freqs[(val >> offset) & 0x3];
return IIO_VAL_INT;
}
@ -510,10 +511,10 @@ static int adis16480_set_filter_freq(struct iio_dev *indio_dev,
val &= ~enable_mask;
} else {
best_freq = 0;
best_diff = 310;
best_diff = st->chip_info->filter_freqs[0];
for (i = 0; i < ARRAY_SIZE(adis16480_def_filter_freqs); i++) {
if (adis16480_def_filter_freqs[i] >= freq) {
diff = adis16480_def_filter_freqs[i] - freq;
if (st->chip_info->filter_freqs[i] >= freq) {
diff = st->chip_info->filter_freqs[i] - freq;
if (diff < best_diff) {
best_diff = diff;
best_freq = i;
@ -730,6 +731,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
.filter_freqs = adis16480_def_filter_freqs,
},
[ADIS16480] = {
.channels = adis16480_channels,
@ -741,6 +743,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
.filter_freqs = adis16480_def_filter_freqs,
},
[ADIS16485] = {
.channels = adis16485_channels,
@ -752,6 +755,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
.filter_freqs = adis16480_def_filter_freqs,
},
[ADIS16488] = {
.channels = adis16480_channels,
@ -763,6 +767,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
.temp_scale = 5650, /* 5.65 milli degree Celsius */
.int_clk = 2460000,
.max_dec_rate = 2048,
.filter_freqs = adis16480_def_filter_freqs,
},
};