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authorStefan Popa <stefan.popa@analog.com>2019-02-27 18:14:26 +0200
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-04-04 20:19:43 +0100
commit83ec2d5404bfdf3aa67abfc594d0e6118d16ac06 (patch)
tree2cb686bdd459912817198341397439c1928a62aa /drivers/iio/imu
parentiio: imu: adis16480: Calculate the sampling frequency in a generic way (diff)
downloadlinux-dev-83ec2d5404bfdf3aa67abfc594d0e6118d16ac06.tar.xz
linux-dev-83ec2d5404bfdf3aa67abfc594d0e6118d16ac06.zip
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>
Diffstat (limited to 'drivers/iio/imu')
-rw-r--r--drivers/iio/imu/adis16480.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index 92abc95d31dc..c90375da8129 100644
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -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,
},
};