Messages in this thread Patch in this message | | | From | Mircea Caprioru <> | Subject | [PATCH V4 3/5] iio: adc: ad7124: Shift to dynamic allocation for channel configuration | Date | Tue, 25 Jun 2019 11:11:26 +0300 |
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This patch changes the channel configuration member of the device structure from a fixed size array to a dynamic allocated one with a size equal to the number of channels specified in the device tree. This will ensure a more flexibility for compatible devices.
Ex. ad7124-4 - can have 4 differential or 8 pseudo-differential channels ad7124-8 - can have 8 differential or 16 pseudo-differential channels
Also the device can suspport any other combination of differential and pseudo-differential channels base on the physical number of inputs available.
Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com> ---
Changelog v2: - nothing changed here
Changelog v3: - nothing changed here
Changelog v4: - nothing changed here
drivers/iio/adc/ad7124.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index ab52c5e9ecb1..edc6f1cc90b2 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -121,7 +121,7 @@ struct ad7124_channel_config { struct ad7124_state { const struct ad7124_chip_info *chip_info; struct ad_sigma_delta sd; - struct ad7124_channel_config channel_config[4]; + struct ad7124_channel_config *channel_config; struct regulator *vref[4]; struct clk *mclk; unsigned int adc_control; @@ -439,6 +439,7 @@ static int ad7124_of_parse_channel_config(struct iio_dev *indio_dev, struct ad7124_state *st = iio_priv(indio_dev); struct device_node *child; struct iio_chan_spec *chan; + struct ad7124_channel_config *chan_config; unsigned int ain[2], channel = 0, tmp; int ret; @@ -453,8 +454,14 @@ static int ad7124_of_parse_channel_config(struct iio_dev *indio_dev, if (!chan) return -ENOMEM; + chan_config = devm_kcalloc(indio_dev->dev.parent, st->num_channels, + sizeof(*chan_config), GFP_KERNEL); + if (!chan_config) + return -ENOMEM; + indio_dev->channels = chan; indio_dev->num_channels = st->num_channels; + st->channel_config = chan_config; for_each_available_child_of_node(np, child) { ret = of_property_read_u32(child, "reg", &channel); -- 2.17.1
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