From 225d59adf1c899176cce0fc80e42b1d1c12f109f Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Fri, 29 May 2015 18:14:21 +0200 Subject: iio: Specify supported modes for buffers For each buffer type specify the supported device modes for this buffer. This allows us for devices which support multiple different operating modes to pick the correct operating mode based on the modes supported by the attached buffers. It also prevents that buffers with conflicting modes are attached to a device at the same time or that a buffer with a non-supported mode is attached to a device (e.g. in-kernel callback buffer to a device only supporting hardware mode). Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/buffer_cb.c | 2 ++ drivers/iio/industrialio-buffer.c | 18 +++++++++++++++--- drivers/iio/kfifo_buf.c | 2 ++ 3 files changed, 19 insertions(+), 3 deletions(-) (limited to 'drivers/iio') diff --git a/drivers/iio/buffer_cb.c b/drivers/iio/buffer_cb.c index eb46e728aa2e..1648e6e5a848 100644 --- a/drivers/iio/buffer_cb.c +++ b/drivers/iio/buffer_cb.c @@ -33,6 +33,8 @@ static void iio_buffer_cb_release(struct iio_buffer *buffer) static const struct iio_buffer_access_funcs iio_cb_access = { .store_to = &iio_buffer_cb_store_to, .release = &iio_buffer_cb_release, + + .modes = INDIO_BUFFER_SOFTWARE | INDIO_BUFFER_TRIGGERED, }; struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 209c7ad793c5..0a14bd825fe0 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -604,6 +604,7 @@ static int iio_verify_update(struct iio_dev *indio_dev, const unsigned long *scan_mask; struct iio_buffer *buffer; bool scan_timestamp; + unsigned int modes; memset(config, 0, sizeof(*config)); @@ -615,12 +616,23 @@ static int iio_verify_update(struct iio_dev *indio_dev, list_is_singular(&indio_dev->buffer_list)) return 0; + modes = indio_dev->modes; + + list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) { + if (buffer == remove_buffer) + continue; + modes &= buffer->access->modes; + } + + if (insert_buffer) + modes &= insert_buffer->access->modes; + /* Definitely possible for devices to support both of these. */ - if ((indio_dev->modes & INDIO_BUFFER_TRIGGERED) && indio_dev->trig) { + if ((modes & INDIO_BUFFER_TRIGGERED) && indio_dev->trig) { config->mode = INDIO_BUFFER_TRIGGERED; - } else if (indio_dev->modes & INDIO_BUFFER_HARDWARE) { + } else if (modes & INDIO_BUFFER_HARDWARE) { config->mode = INDIO_BUFFER_HARDWARE; - } else if (indio_dev->modes & INDIO_BUFFER_SOFTWARE) { + } else if (modes & INDIO_BUFFER_SOFTWARE) { config->mode = INDIO_BUFFER_SOFTWARE; } else { /* Can only occur on first buffer */ diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 847ca561afe0..db15684a4731 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -135,6 +135,8 @@ static const struct iio_buffer_access_funcs kfifo_access_funcs = { .set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo, .set_length = &iio_set_length_kfifo, .release = &iio_kfifo_buffer_release, + + .modes = INDIO_BUFFER_SOFTWARE | INDIO_BUFFER_TRIGGERED, }; struct iio_buffer *iio_kfifo_allocate(void) -- cgit