From: Peter Rosin <peda@axentia.se> To: <linux-kernel@vger.kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Peter Rosin <peda@axentia.se>, Wolfram Sang <wsa@the-dreams.de>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Jonathan Cameron <jic23@kernel.org>, Hartmut Knaack <knaack.h@gmx.de>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, Jonathan Corbet <corbet@lwn.net>, <linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-iio@vger.kernel.org>, <linux-doc@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Colin Ian King <colin.king@canonical.com>, Paul Gortmaker <paul.gortmaker@windriver.com>, Philipp Zabel <p.zabel@pengutronix.de>, <kernel@pengutronix.de> Subject: [PATCH v13 04/10] iio: inkern: api for manipulating ext_info of iio channels Date: Thu, 13 Apr 2017 18:43:08 +0200 [thread overview] Message-ID: <1492101794-13444-5-git-send-email-peda@axentia.se> (raw) In-Reply-To: <1492101794-13444-1-git-send-email-peda@axentia.se> Extend the inkern api with functions for reading and writing ext_info of iio channels. Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Peter Rosin <peda@axentia.se> --- drivers/iio/inkern.c | 60 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/iio/consumer.h | 37 +++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 7a13535dc3e9..8292ad4435ea 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -869,3 +869,63 @@ int iio_write_channel_raw(struct iio_channel *chan, int val) return ret; } EXPORT_SYMBOL_GPL(iio_write_channel_raw); + +unsigned int iio_get_channel_ext_info_count(struct iio_channel *chan) +{ + const struct iio_chan_spec_ext_info *ext_info; + unsigned int i = 0; + + if (!chan->channel->ext_info) + return i; + + for (ext_info = chan->channel->ext_info; ext_info->name; ext_info++) + ++i; + + return i; +} +EXPORT_SYMBOL_GPL(iio_get_channel_ext_info_count); + +static const struct iio_chan_spec_ext_info *iio_lookup_ext_info( + const struct iio_channel *chan, + const char *attr) +{ + const struct iio_chan_spec_ext_info *ext_info; + + if (!chan->channel->ext_info) + return NULL; + + for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) { + if (!strcmp(attr, ext_info->name)) + return ext_info; + } + + return NULL; +} + +ssize_t iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf) +{ + const struct iio_chan_spec_ext_info *ext_info; + + ext_info = iio_lookup_ext_info(chan, attr); + if (!ext_info) + return -EINVAL; + + return ext_info->read(chan->indio_dev, ext_info->private, + chan->channel, buf); +} +EXPORT_SYMBOL_GPL(iio_read_channel_ext_info); + +ssize_t 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; + + ext_info = iio_lookup_ext_info(chan, attr); + if (!ext_info) + return -EINVAL; + + return ext_info->write(chan->indio_dev, ext_info->private, + chan->channel, buf, len); +} +EXPORT_SYMBOL_GPL(iio_write_channel_ext_info); diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 47eeec3218b5..5e347a9805fd 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -312,4 +312,41 @@ 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); +/** + * iio_get_channel_ext_info_count() - get number of ext_info attributes + * connected to the channel. + * @chan: The channel being queried + * + * Returns the number of ext_info attributes + */ +unsigned int iio_get_channel_ext_info_count(struct iio_channel *chan); + +/** + * iio_read_channel_ext_info() - read ext_info attribute from a given channel + * @chan: The channel being queried. + * @attr: The ext_info attribute to read. + * @buf: Where to store the attribute value. Assumed to hold + * at least PAGE_SIZE bytes. + * + * Returns the number of bytes written to buf (perhaps w/o zero termination; + * it need not even be a string), or an error code. + */ +ssize_t iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf); + +/** + * iio_write_channel_ext_info() - write ext_info attribute from a given channel + * @chan: The channel being queried. + * @attr: The ext_info attribute to read. + * @buf: The new attribute value. Strings needs to be zero- + * terminated, but the terminator should not be included + * in the below len. + * @len: The size of the new attribute value. + * + * Returns the number of accepted bytes, which should be the same as len. + * An error code can also be returned. + */ +ssize_t iio_write_channel_ext_info(struct iio_channel *chan, const char *attr, + const char *buf, size_t len); + #endif -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: Peter Rosin <peda@axentia.se> To: linux-kernel@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Peter Rosin <peda@axentia.se>, Wolfram Sang <wsa@the-dreams.de>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Jonathan Cameron <jic23@kernel.org>, Hartmut Knaack <knaack.h@gmx.de>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, Jonathan Corbet <corbet@lwn.net>, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-doc@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>, Colin Ian King <colin.king@canonical.com>, Paul Gortmaker <paul.gortmaker@windriver.com>, Philipp Zabel <p.zabel@pengutronix.de>, kernel@pengutronix.de Subject: [PATCH v13 04/10] iio: inkern: api for manipulating ext_info of iio channels Date: Thu, 13 Apr 2017 18:43:08 +0200 [thread overview] Message-ID: <1492101794-13444-5-git-send-email-peda@axentia.se> (raw) In-Reply-To: <1492101794-13444-1-git-send-email-peda@axentia.se> Extend the inkern api with functions for reading and writing ext_info of iio channels. Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Peter Rosin <peda@axentia.se> --- drivers/iio/inkern.c | 60 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/iio/consumer.h | 37 +++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 7a13535dc3e9..8292ad4435ea 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -869,3 +869,63 @@ int iio_write_channel_raw(struct iio_channel *chan, int val) return ret; } EXPORT_SYMBOL_GPL(iio_write_channel_raw); + +unsigned int iio_get_channel_ext_info_count(struct iio_channel *chan) +{ + const struct iio_chan_spec_ext_info *ext_info; + unsigned int i = 0; + + if (!chan->channel->ext_info) + return i; + + for (ext_info = chan->channel->ext_info; ext_info->name; ext_info++) + ++i; + + return i; +} +EXPORT_SYMBOL_GPL(iio_get_channel_ext_info_count); + +static const struct iio_chan_spec_ext_info *iio_lookup_ext_info( + const struct iio_channel *chan, + const char *attr) +{ + const struct iio_chan_spec_ext_info *ext_info; + + if (!chan->channel->ext_info) + return NULL; + + for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) { + if (!strcmp(attr, ext_info->name)) + return ext_info; + } + + return NULL; +} + +ssize_t iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf) +{ + const struct iio_chan_spec_ext_info *ext_info; + + ext_info = iio_lookup_ext_info(chan, attr); + if (!ext_info) + return -EINVAL; + + return ext_info->read(chan->indio_dev, ext_info->private, + chan->channel, buf); +} +EXPORT_SYMBOL_GPL(iio_read_channel_ext_info); + +ssize_t 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; + + ext_info = iio_lookup_ext_info(chan, attr); + if (!ext_info) + return -EINVAL; + + return ext_info->write(chan->indio_dev, ext_info->private, + chan->channel, buf, len); +} +EXPORT_SYMBOL_GPL(iio_write_channel_ext_info); diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 47eeec3218b5..5e347a9805fd 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -312,4 +312,41 @@ 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); +/** + * iio_get_channel_ext_info_count() - get number of ext_info attributes + * connected to the channel. + * @chan: The channel being queried + * + * Returns the number of ext_info attributes + */ +unsigned int iio_get_channel_ext_info_count(struct iio_channel *chan); + +/** + * iio_read_channel_ext_info() - read ext_info attribute from a given channel + * @chan: The channel being queried. + * @attr: The ext_info attribute to read. + * @buf: Where to store the attribute value. Assumed to hold + * at least PAGE_SIZE bytes. + * + * Returns the number of bytes written to buf (perhaps w/o zero termination; + * it need not even be a string), or an error code. + */ +ssize_t iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf); + +/** + * iio_write_channel_ext_info() - write ext_info attribute from a given channel + * @chan: The channel being queried. + * @attr: The ext_info attribute to read. + * @buf: The new attribute value. Strings needs to be zero- + * terminated, but the terminator should not be included + * in the below len. + * @len: The size of the new attribute value. + * + * Returns the number of accepted bytes, which should be the same as len. + * An error code can also be returned. + */ +ssize_t iio_write_channel_ext_info(struct iio_channel *chan, const char *attr, + const char *buf, size_t len); + #endif -- 2.1.4
next prev parent reply other threads:[~2017-04-13 16:42 UTC|newest] Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-04-13 16:43 [PATCH v13 00/10] mux controller abstraction and iio/i2c muxes Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 01/10] devres: trivial whitespace fix Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 02/10] dt-bindings: document devicetree bindings for mux-controllers and gpio-mux Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-18 10:06 ` Philipp Zabel 2017-04-18 10:06 ` Philipp Zabel 2017-04-18 13:36 ` Peter Rosin 2017-04-18 13:36 ` Peter Rosin 2017-04-19 9:17 ` Philipp Zabel 2017-04-19 9:17 ` Philipp Zabel 2017-04-19 9:17 ` Philipp Zabel 2017-04-19 10:41 ` Peter Rosin 2017-04-19 10:41 ` Peter Rosin 2017-04-19 11:05 ` Philipp Zabel 2017-04-19 11:23 ` Peter Rosin 2017-04-19 11:23 ` Peter Rosin 2017-04-19 16:34 ` Philipp Zabel 2017-04-19 16:34 ` Philipp Zabel 2017-04-13 16:43 ` [PATCH v13 03/10] mux: minimal mux subsystem and gpio-based mux controller Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-18 8:34 ` Philipp Zabel 2017-04-18 8:34 ` Philipp Zabel 2017-04-18 8:51 ` Greg Kroah-Hartman 2017-04-18 8:51 ` Greg Kroah-Hartman 2017-04-18 10:59 ` Peter Rosin 2017-04-18 10:59 ` Peter Rosin 2017-04-18 11:44 ` Greg Kroah-Hartman 2017-04-18 11:44 ` Greg Kroah-Hartman 2017-04-18 21:53 ` Peter Rosin 2017-04-18 21:53 ` Peter Rosin 2017-04-19 2:23 ` Joe Perches 2017-04-19 2:23 ` Joe Perches 2017-04-20 21:53 ` Peter Rosin 2017-04-20 21:53 ` Peter Rosin 2017-04-21 23:28 ` Peter Rosin 2017-04-21 23:28 ` Peter Rosin 2017-05-05 13:19 ` Peter Rosin 2017-05-05 13:19 ` Peter Rosin 2017-04-19 9:06 ` Philipp Zabel 2017-04-19 9:06 ` Philipp Zabel 2017-04-19 12:00 ` Peter Rosin 2017-04-19 12:00 ` Peter Rosin 2017-04-19 13:49 ` Philipp Zabel 2017-04-19 21:04 ` Peter Rosin 2017-04-19 21:04 ` Peter Rosin 2017-04-21 14:18 ` Philipp Zabel 2017-04-21 15:08 ` Peter Rosin 2017-04-21 15:08 ` Peter Rosin 2017-04-21 14:23 ` Philipp Zabel 2017-04-21 14:32 ` Peter Rosin 2017-04-21 14:32 ` Peter Rosin 2017-04-21 14:41 ` Philipp Zabel 2017-04-21 14:41 ` Philipp Zabel 2017-04-21 14:55 ` Peter Rosin 2017-04-21 14:55 ` Peter Rosin 2017-04-21 15:19 ` Philipp Zabel 2017-04-13 16:43 ` Peter Rosin [this message] 2017-04-13 16:43 ` [PATCH v13 04/10] iio: inkern: api for manipulating ext_info of iio channels Peter Rosin 2017-04-13 16:43 ` [PATCH v13 05/10] dt-bindings: iio: io-channel-mux: document io-channel-mux bindings Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 06/10] iio: multiplexer: new iio category and iio-mux driver Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 07/10] dt-bindings: i2c: i2c-mux: document general purpose i2c-mux bindings Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 08/10] i2c: i2c-mux-gpmux: new driver Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 09/10] dt-bindings: mux-adg792a: document devicetree bindings for ADG792A/G mux Peter Rosin 2017-04-13 16:43 ` Peter Rosin 2017-04-13 16:43 ` [PATCH v13 10/10] mux: adg792a: add mux controller driver for ADG792A/G Peter Rosin 2017-04-13 16:43 ` Peter Rosin
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