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authorMircea Caprioru <mircea.caprioru@analog.com>2019-06-25 11:11:26 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-06-26 21:24:21 +0100
commit1478a388f4baaa6da4767a0d7cf82a47826b9fc0 (patch)
tree85ba5b41c620765b9f79d9aa3d956fffcf484911 /drivers/iio
parent0eaecea6e4878abbf1d3e8de3e4eeabc856133d4 (diff)
downloadlinux-1478a388f4baaa6da4767a0d7cf82a47826b9fc0.tar.bz2
iio: adc: ad7124: Shift to dynamic allocation for channel configuration
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> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/ad7124.c9
1 files changed, 8 insertions, 1 deletions
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);