[RFC PATCH 3/7] iio: inkern: api for manipulating ext_info of iio channels
From: Peter Rosin <hidden>
Date: 2016-11-16 23:49:45
Also in:
linux-i2c, linux-iio, lkml
Subsystem:
iio subsystem and drivers, the rest · Maintainers:
Jonathan Cameron, Linus Torvalds
Extend the inkern api with functions for reading and writing ext_info of iio channels. --- drivers/iio/inkern.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/iio/consumer.h | 5 +++++ 2 files changed, 45 insertions(+)
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index cfca17ba2535..5348735281ee 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c@@ -850,3 +850,43 @@ int iio_write_channel_raw(struct iio_channel *chan, int val) return ret; } EXPORT_SYMBOL_GPL(iio_write_channel_raw); + +int iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf) +{ + const struct iio_chan_spec_ext_info *ext_info; + + if (!chan->channel->ext_info) + return -EINVAL; + + for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) { + if (strcmp(attr, ext_info->name)) + continue; + + return ext_info->read(chan->indio_dev, ext_info->private, + chan->channel, buf); + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(iio_read_channel_ext_info); + +int iio_write_channel_ext_info(struct iio_channel *chan, + const char *attr, const char *buf, size_t len) +{ + const struct iio_chan_spec_ext_info *ext_info; + + if (!chan->channel->ext_info) + return -EINVAL; + + for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) { + if (strcmp(attr, ext_info->name)) + continue; + + return ext_info->write(chan->indio_dev, ext_info->private, + chan->channel, buf, len); + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(iio_write_channel_ext_info);
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index 9a4f336d8b4a..3859981cea0a 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h@@ -299,4 +299,9 @@ int iio_read_channel_scale(struct iio_channel *chan, int *val, int iio_convert_raw_to_processed(struct iio_channel *chan, int raw, int *processed, unsigned int scale); +int iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf); +int iio_write_channel_ext_info(struct iio_channel *chan, + const char *attr, const char *buf, size_t len); + #endif
--
2.1.4