6.15-stable review patch. If anyone has any objections, please let me know.
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From: Brian Pellegrino bpellegrino@arka.org
[ Upstream commit 9016776f1301627de78a633bda7c898425a56572 ]
This patch allows writing u64 values to the ADMV8818's high and low-pass filter frequencies. It includes the following changes:
- Rejects negative frequencies in admv8818_write_raw. - Adds a write_raw_get_fmt function to admv8818's iio_info, returning IIO_VAL_INT_64 for the high and low-pass filter 3dB frequency channels.
Fixes: f34fe888ad05 ("iio:filter:admv8818: add support for ADMV8818") Signed-off-by: Brian Pellegrino bpellegrino@arka.org Signed-off-by: Sam Winchenbach swinchenbach@arka.org Link: https://patch.msgid.link/20250328174831.227202-7-sam.winchenbach@framepointe... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/filter/admv8818.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/iio/filter/admv8818.c b/drivers/iio/filter/admv8818.c index 380e119b3cf54..cc8ce0fe74e7c 100644 --- a/drivers/iio/filter/admv8818.c +++ b/drivers/iio/filter/admv8818.c @@ -402,6 +402,19 @@ static int admv8818_read_lpf_freq(struct admv8818_state *st, u64 *lpf_freq) return ret; }
+static int admv8818_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: + return IIO_VAL_INT_64; + default: + return -EINVAL; + } +} + static int admv8818_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long info) @@ -410,6 +423,9 @@ static int admv8818_write_raw(struct iio_dev *indio_dev,
u64 freq = ((u64)val2 << 32 | (u32)val);
+ if ((s64)freq < 0) + return -EINVAL; + switch (info) { case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: return admv8818_lpf_select(st, freq); @@ -571,6 +587,7 @@ static int admv8818_set_mode(struct iio_dev *indio_dev,
static const struct iio_info admv8818_info = { .write_raw = admv8818_write_raw, + .write_raw_get_fmt = admv8818_write_raw_get_fmt, .read_raw = admv8818_read_raw, .debugfs_reg_access = &admv8818_reg_access, };