From 137a83a66f355a9e22039ebf39581ce922119d97 Mon Sep 17 00:00:00 2001 From: Dumitru Ceclan Date: Fri, 7 Jun 2024 17:53:10 +0300 Subject: [PATCH] iio: adc: ad7173: refactor channel configuration parsing Move configurations regarding number of channels from *_fw_parse_device_config to *_fw_parse_channel_config. Suggested-by: Jonathan Cameron Link: https://lore.kernel.org/all/20240303162148.3ad91aa2@jic23-huawei/ Reviewed-by: David Lechner Reviewed-by: Nuno Sa Signed-off-by: Dumitru Ceclan Link: https://patch.msgid.link/20240607-ad4111-v7-4-97e3855900a0@analog.com Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad7173.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c index 428676c73722..39801c076dcd 100644 --- a/drivers/iio/adc/ad7173.c +++ b/drivers/iio/adc/ad7173.c @@ -912,7 +912,23 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev) struct device *dev = indio_dev->dev.parent; struct iio_chan_spec *chan_arr, *chan; unsigned int ain[2], chan_index = 0; - int ref_sel, ret; + int ref_sel, ret, num_channels; + + num_channels = device_get_child_node_count(dev); + + if (st->info->has_temp) + num_channels++; + + if (num_channels == 0) + return dev_err_probe(dev, -ENODATA, "No channels specified\n"); + + if (num_channels > st->info->num_channels) + return dev_err_probe(dev, -EINVAL, + "Too many channels specified. Maximum is %d, not including temperature channel if supported.\n", + st->info->num_channels); + + indio_dev->num_channels = num_channels; + st->num_channels = num_channels; chan_arr = devm_kcalloc(dev, sizeof(*indio_dev->channels), st->num_channels, GFP_KERNEL); @@ -1007,7 +1023,6 @@ static int ad7173_fw_parse_device_config(struct iio_dev *indio_dev) { struct ad7173_state *st = iio_priv(indio_dev); struct device *dev = indio_dev->dev.parent; - unsigned int num_channels; int ret; st->regulators[0].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_EXT_REF]; @@ -1066,16 +1081,6 @@ static int ad7173_fw_parse_device_config(struct iio_dev *indio_dev) ad7173_sigma_delta_info.irq_line = ret; - num_channels = device_get_child_node_count(dev); - - if (st->info->has_temp) - num_channels++; - - if (num_channels == 0) - return dev_err_probe(dev, -ENODATA, "No channels specified\n"); - indio_dev->num_channels = num_channels; - st->num_channels = num_channels; - return ad7173_fw_parse_channel_config(indio_dev); } -- 2.20.1