Commit 75ed0be7 authored by Cristian Pop's avatar Cristian Pop Committed by Jonathan Cameron
Browse files

iio: adc: ad7768-1: Add channel labels. 



For better identification of the channels.

Signed-off-by: default avatarCristian Pop <cristian.pop@analog.com>
Link: https://lore.kernel.org/r/20200928090959.88842-3-cristian.pop@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 3079188f

drivers/iio/adc/ad7768-1.c

+41 −0
Original line number Original line Diff line number Diff line
@@ -161,6 +161,7 @@ struct ad7768_state { 
	struct completion completion;

	struct completion completion;

	struct iio_trigger *trig;

	struct iio_trigger *trig;

	struct gpio_desc *gpio_sync_in;

	struct gpio_desc *gpio_sync_in;

	const char *labels[ARRAY_SIZE(ad7768_channels)];

	/*

	/*

	 * DMA (thus cache coherency maintenance) requires the

	 * DMA (thus cache coherency maintenance) requires the

	 * transfer buffers to live in their own cache lines.

	 * transfer buffers to live in their own cache lines.
@@ -407,6 +408,14 @@ static int ad7768_write_raw(struct iio_dev *indio_dev, 
	}

	}

}

}





static int ad7768_read_label(struct iio_dev *indio_dev,

	const struct iio_chan_spec *chan, char *label)

{

	struct ad7768_state *st = iio_priv(indio_dev);



	return sprintf(label, "%s\n", st->labels[chan->channel]);

}



static struct attribute *ad7768_attributes[] = {

static struct attribute *ad7768_attributes[] = {

	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,

	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,

	NULL

	NULL
@@ -420,6 +429,7 @@ static const struct iio_info ad7768_info = { 
	.attrs = &ad7768_group,

	.attrs = &ad7768_group,

	.read_raw = &ad7768_read_raw,

	.read_raw = &ad7768_read_raw,

	.write_raw = &ad7768_write_raw,

	.write_raw = &ad7768_write_raw,

	.read_label = ad7768_read_label,

	.debugfs_reg_access = &ad7768_reg_access,

	.debugfs_reg_access = &ad7768_reg_access,

};

};
@@ -532,6 +542,33 @@ static void ad7768_clk_disable(void *data) 
	clk_disable_unprepare(st->mclk);

	clk_disable_unprepare(st->mclk);

}

}





static int ad7768_set_channel_label(struct iio_dev *indio_dev,

						int num_channels)

{

	struct ad7768_state *st = iio_priv(indio_dev);

	struct device *device = indio_dev->dev.parent;

	struct fwnode_handle *fwnode;

	struct fwnode_handle *child;

	const char *label;

	int crt_ch = 0;



	fwnode = dev_fwnode(device);

	fwnode_for_each_child_node(fwnode, child) {

		if (fwnode_property_read_u32(child, "reg", &crt_ch))

			continue;



		if (crt_ch >= num_channels)

			continue;



		if (fwnode_property_read_string(child, "label", &label))

			continue;



		st->labels[crt_ch] = label;

	}



	return 0;

}



static int ad7768_probe(struct spi_device *spi)

static int ad7768_probe(struct spi_device *spi)

{

{

	struct ad7768_state *st;

	struct ad7768_state *st;
@@ -604,6 +641,10 @@ static int ad7768_probe(struct spi_device *spi) 




	init_completion(&st->completion);

	init_completion(&st->completion);





	ret = ad7768_set_channel_label(indio_dev, ARRAY_SIZE(ad7768_channels));

	if (ret)

		return ret;



	ret = devm_request_irq(&spi->dev, spi->irq,

	ret = devm_request_irq(&spi->dev, spi->irq,

			       &ad7768_interrupt,

			       &ad7768_interrupt,

			       IRQF_TRIGGER_RISING | IRQF_ONESHOT,

			       IRQF_TRIGGER_RISING | IRQF_ONESHOT,