iio: adc: ad7124: Shift to dynamic allocation for channel configuration (1478a388) · Commits · 戴 / test

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>

drivers/iio/adc/ad7124.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -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);

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