From 217a5cf0a1100264ced523e437e2e22c442dca7c Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 26 Nov 2014 18:55:09 +0100 Subject: iio: Unexport iio_scan_mask_set() Individual drivers should not be messing with the scan mask that contains the list of enabled channels. This is something that is supposed to be managed by the core. Now that the last few drivers that used it to configure a default scan mask have been updated to not do this anymore we can unexport the function. Note, this patch also requires moving a few functions around so they are all declared before the first internal user. Signed-off-by: Lars-Peter Clausen Reviewed-by: Daniel Baluta Signed-off-by: Jonathan Cameron --- include/linux/iio/buffer.h | 9 --------- 1 file changed, 9 deletions(-) (limited to 'include/linux/iio/buffer.h') diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 519392763393..8c8ce611949c 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -116,15 +116,6 @@ void iio_buffer_init(struct iio_buffer *buffer); int iio_scan_mask_query(struct iio_dev *indio_dev, struct iio_buffer *buffer, int bit); -/** - * iio_scan_mask_set() - set particular bit in the scan mask - * @indio_dev IIO device structure - * @buffer: the buffer whose scan mask we are interested in - * @bit: the bit to be set. - **/ -int iio_scan_mask_set(struct iio_dev *indio_dev, - struct iio_buffer *buffer, int bit); - /** * iio_push_to_buffers() - push to a registered buffer. * @indio_dev: iio_dev structure for device. -- cgit v1.3 From 3e1b6c95b990c93f4aa3b17e9f66221e2fa44bee Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 26 Nov 2014 18:55:12 +0100 Subject: iio: Move buffer registration to the core Originally device and buffer registration were kept as separate operations in IIO to allow to register two distinct sets of channels for buffered and non-buffered operations. This has since already been further restricted and the channel set registered for the buffer needs to be a subset of the channel set registered for the device. Additionally the possibility to not have a raw (or processed) attribute for a channel which was registered for the device was added a while ago. This means it is possible to not register any device level attributes for a channel even if it is registered for the device. Also if a channel's scan_index is set to -1 and the channel is registered for the buffer it is ignored. So in summary it means it is possible to register the same channel array for both the device and the buffer yet still end up with distinctive sets of channels for both of them. This makes the argument for having to have to manually register the channels for both the device and the buffer invalid. Considering that the vast majority of all drivers want to register the same set of channels for both the buffer and the device it makes sense to move the buffer registration into the core to avoid some boiler-plate code in the device driver setup path. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ti_am335x_adc.c | 9 --------- drivers/iio/iio_core.h | 9 +++++++++ drivers/iio/industrialio-buffer.c | 18 ++++++++++------- drivers/iio/industrialio-core.c | 14 ++++++++++++- drivers/iio/industrialio-triggered-buffer.c | 11 +---------- drivers/staging/iio/accel/lis3l02dq_core.c | 13 +------------ drivers/staging/iio/accel/sca3000_core.c | 10 +--------- drivers/staging/iio/iio_simple_dummy_buffer.c | 8 -------- drivers/staging/iio/impedance-analyzer/ad5933.c | 12 ++---------- drivers/staging/iio/meter/ade7758.h | 1 - drivers/staging/iio/meter/ade7758_core.c | 15 ++------------ drivers/staging/iio/meter/ade7758_ring.c | 5 ----- include/linux/iio/buffer.h | 26 ------------------------- 13 files changed, 40 insertions(+), 111 deletions(-) (limited to 'include/linux/iio/buffer.h') diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c index b730864731e8..d550ac7d2365 100644 --- a/drivers/iio/adc/ti_am335x_adc.c +++ b/drivers/iio/adc/ti_am335x_adc.c @@ -264,16 +264,8 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev, indio_dev->setup_ops = setup_ops; indio_dev->modes |= INDIO_BUFFER_HARDWARE; - ret = iio_buffer_register(indio_dev, - indio_dev->channels, - indio_dev->num_channels); - if (ret) - goto error_free_irq; - return 0; -error_free_irq: - free_irq(irq, indio_dev); error_kfifo_free: iio_kfifo_free(indio_dev->buffer); return ret; @@ -285,7 +277,6 @@ static void tiadc_iio_buffered_hardware_remove(struct iio_dev *indio_dev) free_irq(adc_dev->mfd_tscadc->irq, indio_dev); iio_kfifo_free(indio_dev->buffer); - iio_buffer_unregister(indio_dev); } diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h index 5f0ea77fe717..359883525ab7 100644 --- a/drivers/iio/iio_core.h +++ b/drivers/iio/iio_core.h @@ -48,6 +48,8 @@ unsigned int iio_buffer_poll(struct file *filp, ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf, size_t n, loff_t *f_ps); +int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev); +void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev); #define iio_buffer_poll_addr (&iio_buffer_poll) #define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer) @@ -60,6 +62,13 @@ void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); #define iio_buffer_poll_addr NULL #define iio_buffer_read_first_n_outer_addr NULL +static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {} + static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index f667e4e7ea6d..8bb3e64eaf2c 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -385,14 +385,16 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev, static const char * const iio_scan_elements_group_name = "scan_elements"; -int iio_buffer_register(struct iio_dev *indio_dev, - const struct iio_chan_spec *channels, - int num_channels) +int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) { struct iio_dev_attr *p; struct attribute **attr; struct iio_buffer *buffer = indio_dev->buffer; int ret, i, attrn, attrcount, attrcount_orig = 0; + const struct iio_chan_spec *channels; + + if (!buffer) + return 0; if (buffer->attrs) indio_dev->groups[indio_dev->groupcounter++] = buffer->attrs; @@ -404,9 +406,10 @@ int iio_buffer_register(struct iio_dev *indio_dev, } attrcount = attrcount_orig; INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list); + channels = indio_dev->channels; if (channels) { /* new magic */ - for (i = 0; i < num_channels; i++) { + for (i = 0; i < indio_dev->num_channels; i++) { if (channels[i].scan_index < 0) continue; @@ -463,15 +466,16 @@ error_cleanup_dynamic: return ret; } -EXPORT_SYMBOL(iio_buffer_register); -void iio_buffer_unregister(struct iio_dev *indio_dev) +void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) { + if (!indio_dev->buffer) + return; + kfree(indio_dev->buffer->scan_mask); kfree(indio_dev->buffer->scan_el_group.attrs); iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); } -EXPORT_SYMBOL(iio_buffer_unregister); ssize_t iio_buffer_read_length(struct device *dev, struct device_attribute *attr, diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 45bb3a43afac..ee442ee482ab 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -1158,11 +1158,19 @@ int iio_device_register(struct iio_dev *indio_dev) "Failed to register debugfs interfaces\n"); return ret; } + + ret = iio_buffer_alloc_sysfs_and_mask(indio_dev); + if (ret) { + dev_err(indio_dev->dev.parent, + "Failed to create buffer sysfs interfaces\n"); + goto error_unreg_debugfs; + } + ret = iio_device_register_sysfs(indio_dev); if (ret) { dev_err(indio_dev->dev.parent, "Failed to register sysfs interfaces\n"); - goto error_unreg_debugfs; + goto error_buffer_free_sysfs; } ret = iio_device_register_eventset(indio_dev); if (ret) { @@ -1195,6 +1203,8 @@ error_unreg_eventset: iio_device_unregister_eventset(indio_dev); error_free_sysfs: iio_device_unregister_sysfs(indio_dev); +error_buffer_free_sysfs: + iio_buffer_free_sysfs_and_mask(indio_dev); error_unreg_debugfs: iio_device_unregister_debugfs(indio_dev); return ret; @@ -1223,6 +1233,8 @@ void iio_device_unregister(struct iio_dev *indio_dev) iio_buffer_wakeup_poll(indio_dev); mutex_unlock(&indio_dev->info_exist_lock); + + iio_buffer_free_sysfs_and_mask(indio_dev); } EXPORT_SYMBOL(iio_device_unregister); diff --git a/drivers/iio/industrialio-triggered-buffer.c b/drivers/iio/industrialio-triggered-buffer.c index d6f54930b34a..61a5d0404edf 100644 --- a/drivers/iio/industrialio-triggered-buffer.c +++ b/drivers/iio/industrialio-triggered-buffer.c @@ -32,7 +32,7 @@ static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { * * This function combines some common tasks which will normally be performed * when setting up a triggered buffer. It will allocate the buffer and the - * pollfunc, as well as register the buffer with the IIO core. + * pollfunc. * * Before calling this function the indio_dev structure should already be * completely initialized, but not yet registered. In practice this means that @@ -78,16 +78,8 @@ int iio_triggered_buffer_setup(struct iio_dev *indio_dev, /* Flag that polled ring buffering is possible */ indio_dev->modes |= INDIO_BUFFER_TRIGGERED; - ret = iio_buffer_register(indio_dev, - indio_dev->channels, - indio_dev->num_channels); - if (ret) - goto error_dealloc_pollfunc; - return 0; -error_dealloc_pollfunc: - iio_dealloc_pollfunc(indio_dev->pollfunc); error_kfifo_free: iio_kfifo_free(indio_dev->buffer); error_ret: @@ -101,7 +93,6 @@ EXPORT_SYMBOL(iio_triggered_buffer_setup); */ void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev) { - iio_buffer_unregister(indio_dev); iio_dealloc_pollfunc(indio_dev->pollfunc); iio_kfifo_free(indio_dev->buffer); } diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c index f5e145caffa9..b78c9c5d5588 100644 --- a/drivers/staging/iio/accel/lis3l02dq_core.c +++ b/drivers/staging/iio/accel/lis3l02dq_core.c @@ -716,14 +716,6 @@ static int lis3l02dq_probe(struct spi_device *spi) if (ret) return ret; - ret = iio_buffer_register(indio_dev, - lis3l02dq_channels, - ARRAY_SIZE(lis3l02dq_channels)); - if (ret) { - dev_err(&spi->dev, "failed to initialize the buffer\n"); - goto error_unreg_buffer_funcs; - } - if (spi->irq) { ret = request_threaded_irq(st->us->irq, &lis3l02dq_th, @@ -732,7 +724,7 @@ static int lis3l02dq_probe(struct spi_device *spi) "lis3l02dq", indio_dev); if (ret) - goto error_uninitialize_buffer; + goto error_unreg_buffer_funcs; ret = lis3l02dq_probe_trigger(indio_dev); if (ret) @@ -756,8 +748,6 @@ error_remove_trigger: error_free_interrupt: if (spi->irq) free_irq(st->us->irq, indio_dev); -error_uninitialize_buffer: - iio_buffer_unregister(indio_dev); error_unreg_buffer_funcs: lis3l02dq_unconfigure_buffer(indio_dev); return ret; @@ -804,7 +794,6 @@ static int lis3l02dq_remove(struct spi_device *spi) free_irq(st->us->irq, indio_dev); lis3l02dq_remove_trigger(indio_dev); - iio_buffer_unregister(indio_dev); lis3l02dq_unconfigure_buffer(indio_dev); return 0; diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c index aef8c916e07b..9cd04c7147c8 100644 --- a/drivers/staging/iio/accel/sca3000_core.c +++ b/drivers/staging/iio/accel/sca3000_core.c @@ -1156,11 +1156,6 @@ static int sca3000_probe(struct spi_device *spi) if (ret < 0) return ret; - ret = iio_buffer_register(indio_dev, indio_dev->channels, - indio_dev->num_channels); - if (ret < 0) - goto error_unregister_dev; - if (spi->irq) { ret = request_threaded_irq(spi->irq, NULL, @@ -1169,7 +1164,7 @@ static int sca3000_probe(struct spi_device *spi) "sca3000", indio_dev); if (ret) - goto error_unregister_ring; + goto error_unregister_dev; } sca3000_register_ring_funcs(indio_dev); ret = sca3000_clean_setup(st); @@ -1180,8 +1175,6 @@ static int sca3000_probe(struct spi_device *spi) error_free_irq: if (spi->irq) free_irq(spi->irq, indio_dev); -error_unregister_ring: - iio_buffer_unregister(indio_dev); error_unregister_dev: iio_device_unregister(indio_dev); return ret; @@ -1215,7 +1208,6 @@ static int sca3000_remove(struct spi_device *spi) if (spi->irq) free_irq(spi->irq, indio_dev); iio_device_unregister(indio_dev); - iio_buffer_unregister(indio_dev); sca3000_unconfigure_ring(indio_dev); return 0; diff --git a/drivers/staging/iio/iio_simple_dummy_buffer.c b/drivers/staging/iio/iio_simple_dummy_buffer.c index 35d60d5045dc..a2d72c102119 100644 --- a/drivers/staging/iio/iio_simple_dummy_buffer.c +++ b/drivers/staging/iio/iio_simple_dummy_buffer.c @@ -172,15 +172,8 @@ int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev) */ indio_dev->modes |= INDIO_BUFFER_TRIGGERED; - ret = iio_buffer_register(indio_dev, indio_dev->channels, - indio_dev->num_channels); - if (ret) - goto error_dealloc_pollfunc; - return 0; -error_dealloc_pollfunc: - iio_dealloc_pollfunc(indio_dev->pollfunc); error_free_buffer: iio_kfifo_free(indio_dev->buffer); error_ret: @@ -194,7 +187,6 @@ error_ret: */ void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev) { - iio_buffer_unregister(indio_dev); iio_dealloc_pollfunc(indio_dev->pollfunc); iio_kfifo_free(indio_dev->buffer); } diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c index aa6a368506cd..c50b1380b9aa 100644 --- a/drivers/staging/iio/impedance-analyzer/ad5933.c +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c @@ -752,23 +752,16 @@ static int ad5933_probe(struct i2c_client *client, if (ret) goto error_disable_reg; - ret = iio_buffer_register(indio_dev, ad5933_channels, - ARRAY_SIZE(ad5933_channels)); - if (ret) - goto error_unreg_ring; - ret = ad5933_setup(st); if (ret) - goto error_uninitialize_ring; + goto error_unreg_ring; ret = iio_device_register(indio_dev); if (ret) - goto error_uninitialize_ring; + goto error_unreg_ring; return 0; -error_uninitialize_ring: - iio_buffer_unregister(indio_dev); error_unreg_ring: iio_kfifo_free(indio_dev->buffer); error_disable_reg: @@ -784,7 +777,6 @@ static int ad5933_remove(struct i2c_client *client) struct ad5933_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); - iio_buffer_unregister(indio_dev); iio_kfifo_free(indio_dev->buffer); if (!IS_ERR(st->reg)) regulator_disable(st->reg); diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h index 07318203a836..762d7dc0e6e2 100644 --- a/drivers/staging/iio/meter/ade7758.h +++ b/drivers/staging/iio/meter/ade7758.h @@ -146,7 +146,6 @@ ssize_t ade7758_read_data_from_ring(struct device *dev, int ade7758_configure_ring(struct iio_dev *indio_dev); void ade7758_unconfigure_ring(struct iio_dev *indio_dev); -void ade7758_uninitialize_ring(struct iio_dev *indio_dev); int ade7758_set_irq(struct device *dev, bool enable); int ade7758_spi_write_reg_8(struct device *dev, diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c index abc60067cd72..6e8b01104a68 100644 --- a/drivers/staging/iio/meter/ade7758_core.c +++ b/drivers/staging/iio/meter/ade7758_core.c @@ -885,23 +885,15 @@ static int ade7758_probe(struct spi_device *spi) if (ret) goto error_free_tx; - ret = iio_buffer_register(indio_dev, - &ade7758_channels[0], - ARRAY_SIZE(ade7758_channels)); - if (ret) { - dev_err(&spi->dev, "failed to initialize the ring\n"); - goto error_unreg_ring_funcs; - } - /* Get the device into a sane initial state */ ret = ade7758_initial_setup(indio_dev); if (ret) - goto error_uninitialize_ring; + goto error_unreg_ring_funcs; if (spi->irq) { ret = ade7758_probe_trigger(indio_dev); if (ret) - goto error_uninitialize_ring; + goto error_unreg_ring_funcs; } ret = iio_device_register(indio_dev); @@ -913,8 +905,6 @@ static int ade7758_probe(struct spi_device *spi) error_remove_trigger: if (spi->irq) ade7758_remove_trigger(indio_dev); -error_uninitialize_ring: - ade7758_uninitialize_ring(indio_dev); error_unreg_ring_funcs: ade7758_unconfigure_ring(indio_dev); error_free_tx: @@ -932,7 +922,6 @@ static int ade7758_remove(struct spi_device *spi) iio_device_unregister(indio_dev); ade7758_stop_device(&indio_dev->dev); ade7758_remove_trigger(indio_dev); - ade7758_uninitialize_ring(indio_dev); ade7758_unconfigure_ring(indio_dev); kfree(st->tx); kfree(st->rx); diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c index c0accf8cce93..27c3ed6ca468 100644 --- a/drivers/staging/iio/meter/ade7758_ring.c +++ b/drivers/staging/iio/meter/ade7758_ring.c @@ -181,8 +181,3 @@ error_iio_kfifo_free: iio_kfifo_free(indio_dev->buffer); return ret; } - -void ade7758_uninitialize_ring(struct iio_dev *indio_dev) -{ - iio_buffer_unregister(indio_dev); -} diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 8c8ce611949c..b0e006c3db43 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -150,22 +150,6 @@ static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, int iio_update_demux(struct iio_dev *indio_dev); -/** - * iio_buffer_register() - register the buffer with IIO core - * @indio_dev: device with the buffer to be registered - * @channels: the channel descriptions used to construct buffer - * @num_channels: the number of channels - **/ -int iio_buffer_register(struct iio_dev *indio_dev, - const struct iio_chan_spec *channels, - int num_channels); - -/** - * iio_buffer_unregister() - unregister the buffer from IIO core - * @indio_dev: the device with the buffer to be unregistered - **/ -void iio_buffer_unregister(struct iio_dev *indio_dev); - /** * iio_buffer_read_length() - attr func to get number of datums in the buffer **/ @@ -223,16 +207,6 @@ static inline void iio_device_attach_buffer(struct iio_dev *indio_dev, #else /* CONFIG_IIO_BUFFER */ -static inline int iio_buffer_register(struct iio_dev *indio_dev, - const struct iio_chan_spec *channels, - int num_channels) -{ - return 0; -} - -static inline void iio_buffer_unregister(struct iio_dev *indio_dev) -{} - static inline void iio_buffer_get(struct iio_buffer *buffer) {} static inline void iio_buffer_put(struct iio_buffer *buffer) {} -- cgit v1.3 From 616dde2a1ea3df9398b1fcc7d6d6516c5fab6183 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 26 Nov 2014 18:55:13 +0100 Subject: iio: Remove get_bytes_per_datum() from iio_buffer_access_funcs There haven't been any users of the get_bytes_per_datum() callback for a while. The core assumes that the number of bytes per datum can be calculated based on the enabled channels and the storage size of the channel and iio_compute_scan_bytes() is used to compute this number. So remove the callback. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/kfifo_buf.c | 6 ------ drivers/staging/iio/Documentation/ring.txt | 4 ++-- drivers/staging/iio/accel/sca3000_ring.c | 7 ------- include/linux/iio/buffer.h | 2 -- 4 files changed, 2 insertions(+), 17 deletions(-) (limited to 'include/linux/iio/buffer.h') diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 7134e8ada09a..1258b4e0a722 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -66,11 +66,6 @@ static struct attribute_group iio_kfifo_attribute_group = { .name = "buffer", }; -static int iio_get_bytes_per_datum_kfifo(struct iio_buffer *r) -{ - return r->bytes_per_datum; -} - static int iio_mark_update_needed_kfifo(struct iio_buffer *r) { struct iio_kfifo *kf = iio_to_kfifo(r); @@ -159,7 +154,6 @@ static const struct iio_buffer_access_funcs kfifo_access_funcs = { .read_first_n = &iio_read_first_n_kfifo, .data_available = iio_kfifo_buf_data_available, .request_update = &iio_request_update_kfifo, - .get_bytes_per_datum = &iio_get_bytes_per_datum_kfifo, .set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo, .get_length = &iio_get_length_kfifo, .set_length = &iio_set_length_kfifo, diff --git a/drivers/staging/iio/Documentation/ring.txt b/drivers/staging/iio/Documentation/ring.txt index e1da43381d0e..434d63a6123a 100644 --- a/drivers/staging/iio/Documentation/ring.txt +++ b/drivers/staging/iio/Documentation/ring.txt @@ -39,8 +39,8 @@ request_update If parameters have changed that require reinitialization or configuration of the buffer this will trigger it. -get_bytes_per_datum, set_bytes_per_datum - Get/set the number of bytes for a complete scan. (All samples + timestamp) +set_bytes_per_datum + Set the number of bytes for a complete scan. (All samples + timestamp) get_length / set_length Get/set the number of complete scans that may be held by the buffer. diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c index 157827651bfa..aa0e5d85bfe2 100644 --- a/drivers/staging/iio/accel/sca3000_ring.c +++ b/drivers/staging/iio/accel/sca3000_ring.c @@ -135,12 +135,6 @@ static int sca3000_ring_get_length(struct iio_buffer *r) return 64; } -/* only valid if resolution is kept at 11bits */ -static int sca3000_ring_get_bytes_per_datum(struct iio_buffer *r) -{ - return 6; -} - static bool sca3000_ring_buf_data_available(struct iio_buffer *r) { return r->stufftoread; @@ -278,7 +272,6 @@ static void sca3000_ring_release(struct iio_buffer *r) static const struct iio_buffer_access_funcs sca3000_ring_access_funcs = { .read_first_n = &sca3000_read_first_n_hw_rb, .get_length = &sca3000_ring_get_length, - .get_bytes_per_datum = &sca3000_ring_get_bytes_per_datum, .data_available = sca3000_ring_buf_data_available, .release = sca3000_ring_release, }; diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index b0e006c3db43..79cdb3d1b1bc 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -25,7 +25,6 @@ struct iio_buffer; * available. * @request_update: if a parameter change has been marked, update underlying * storage. - * @get_bytes_per_datum:get current bytes per datum * @set_bytes_per_datum:set number of bytes per datum * @get_length: get number of datums in buffer * @set_length: set number of datums in buffer @@ -49,7 +48,6 @@ struct iio_buffer_access_funcs { int (*request_update)(struct iio_buffer *buffer); - int (*get_bytes_per_datum)(struct iio_buffer *buffer); int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd); int (*get_length)(struct iio_buffer *buffer); int (*set_length)(struct iio_buffer *buffer, int length); -- cgit v1.3 From 08e7e0adaa17205f86894157d86c4bee3c714330 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 26 Nov 2014 18:55:15 +0100 Subject: iio: buffer: Allocate standard attributes in the core All buffers want at least the length and the enable attribute. Move the creation of those attributes to the core instead of having to do this in each individual buffer implementation. This allows us to get rid of some boiler-plate code. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-buffer.c | 59 ++++++++++++++++++++++---------- drivers/iio/kfifo_buf.c | 15 -------- drivers/staging/iio/accel/sca3000_ring.c | 14 ++------ include/linux/iio/buffer.h | 37 ++------------------ 4 files changed, 45 insertions(+), 80 deletions(-) (limited to 'include/linux/iio/buffer.h') diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 8cd89eb269c5..ba89357fc096 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -383,9 +383,9 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev, return ret; } -ssize_t iio_buffer_read_length(struct device *dev, - struct device_attribute *attr, - char *buf) +static ssize_t iio_buffer_read_length(struct device *dev, + struct device_attribute *attr, + char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_buffer *buffer = indio_dev->buffer; @@ -396,12 +396,10 @@ ssize_t iio_buffer_read_length(struct device *dev, return 0; } -EXPORT_SYMBOL(iio_buffer_read_length); -ssize_t iio_buffer_write_length(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) +static ssize_t iio_buffer_write_length(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_buffer *buffer = indio_dev->buffer; @@ -428,16 +426,14 @@ ssize_t iio_buffer_write_length(struct device *dev, return ret ? ret : len; } -EXPORT_SYMBOL(iio_buffer_write_length); -ssize_t iio_buffer_show_enable(struct device *dev, - struct device_attribute *attr, - char *buf) +static ssize_t iio_buffer_show_enable(struct device *dev, + struct device_attribute *attr, + char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); return sprintf(buf, "%d\n", iio_buffer_is_active(indio_dev->buffer)); } -EXPORT_SYMBOL(iio_buffer_show_enable); static int iio_compute_scan_bytes(struct iio_dev *indio_dev, const unsigned long *mask, bool timestamp) @@ -724,10 +720,10 @@ out_unlock: } EXPORT_SYMBOL_GPL(iio_update_buffers); -ssize_t iio_buffer_store_enable(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) +static ssize_t iio_buffer_store_enable(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) { int ret; bool requested_state; @@ -759,10 +755,14 @@ done: mutex_unlock(&indio_dev->mlock); return (ret < 0) ? ret : len; } -EXPORT_SYMBOL(iio_buffer_store_enable); static const char * const iio_scan_elements_group_name = "scan_elements"; +static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length, + iio_buffer_write_length); +static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, + iio_buffer_show_enable, iio_buffer_store_enable); + int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) { struct iio_dev_attr *p; @@ -774,6 +774,27 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) if (!buffer) return 0; + attrcount = 0; + if (buffer->attrs) { + while (buffer->attrs[attrcount] != NULL) + attrcount++; + } + + buffer->buffer_group.name = "buffer"; + buffer->buffer_group.attrs = kcalloc(attrcount + 3, + sizeof(*buffer->buffer_group.attrs), GFP_KERNEL); + if (!buffer->buffer_group.attrs) + return -ENOMEM; + + buffer->buffer_group.attrs[0] = &dev_attr_length.attr; + buffer->buffer_group.attrs[1] = &dev_attr_enable.attr; + if (buffer->attrs) + memcpy(&buffer->buffer_group.attrs[2], buffer->attrs, + sizeof(*&buffer->buffer_group.attrs) * (attrcount - 2)); + buffer->buffer_group.attrs[attrcount+2] = NULL; + + indio_dev->groups[indio_dev->groupcounter++] = &buffer->buffer_group; + if (buffer->scan_el_attrs != NULL) { attr = buffer->scan_el_attrs->attrs; while (*attr++ != NULL) @@ -838,6 +859,7 @@ error_free_scan_mask: kfree(buffer->scan_mask); error_cleanup_dynamic: iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); + kfree(indio_dev->buffer->buffer_group.attrs); return ret; } @@ -848,6 +870,7 @@ void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) return; kfree(indio_dev->buffer->scan_mask); + kfree(indio_dev->buffer->buffer_group.attrs); kfree(indio_dev->buffer->scan_el_group.attrs); iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); } diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 1258b4e0a722..3b0a3bc4f0ad 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -52,20 +52,6 @@ static int iio_get_length_kfifo(struct iio_buffer *r) return r->length; } -static IIO_BUFFER_ENABLE_ATTR; -static IIO_BUFFER_LENGTH_ATTR; - -static struct attribute *iio_kfifo_attributes[] = { - &dev_attr_length.attr, - &dev_attr_enable.attr, - NULL, -}; - -static struct attribute_group iio_kfifo_attribute_group = { - .attrs = iio_kfifo_attributes, - .name = "buffer", -}; - static int iio_mark_update_needed_kfifo(struct iio_buffer *r) { struct iio_kfifo *kf = iio_to_kfifo(r); @@ -169,7 +155,6 @@ struct iio_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev) return NULL; kf->update_needed = true; iio_buffer_init(&kf->buffer); - kf->buffer.attrs = &iio_kfifo_attribute_group; kf->buffer.access = &kfifo_access_funcs; kf->buffer.length = 2; mutex_init(&kf->user_lock); diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c index aa0e5d85bfe2..f2f260e01550 100644 --- a/drivers/staging/iio/accel/sca3000_ring.c +++ b/drivers/staging/iio/accel/sca3000_ring.c @@ -140,9 +140,6 @@ static bool sca3000_ring_buf_data_available(struct iio_buffer *r) return r->stufftoread; } -static IIO_BUFFER_ENABLE_ATTR; -static IIO_BUFFER_LENGTH_ATTR; - /** * sca3000_query_ring_int() is the hardware ring status interrupt enabled **/ @@ -232,20 +229,13 @@ static IIO_DEVICE_ATTR(in_accel_scale, * only apply to the ring buffer. At all times full rate and accuracy * is available via direct reading from registers. */ -static struct attribute *sca3000_ring_attributes[] = { - &dev_attr_length.attr, - &dev_attr_enable.attr, +static const struct attribute *sca3000_ring_attributes[] = { &iio_dev_attr_50_percent.dev_attr.attr, &iio_dev_attr_75_percent.dev_attr.attr, &iio_dev_attr_in_accel_scale.dev_attr.attr, NULL, }; -static struct attribute_group sca3000_ring_attr = { - .attrs = sca3000_ring_attributes, - .name = "buffer", -}; - static struct iio_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev) { struct iio_buffer *buf; @@ -258,7 +248,7 @@ static struct iio_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev) ring->private = indio_dev; buf = &ring->buf; buf->stufftoread = 0; - buf->attrs = &sca3000_ring_attr; + buf->attrs = sca3000_ring_attributes; iio_buffer_init(buf); return buf; diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 79cdb3d1b1bc..16b7663036f2 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -83,10 +83,11 @@ struct iio_buffer { bool scan_timestamp; const struct iio_buffer_access_funcs *access; struct list_head scan_el_dev_attr_list; + struct attribute_group buffer_group; struct attribute_group scan_el_group; wait_queue_head_t pollq; bool stufftoread; - const struct attribute_group *attrs; + const struct attribute **attrs; struct list_head demux_list; void *demux_bounce; struct list_head buffer_list; @@ -148,40 +149,6 @@ static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, int iio_update_demux(struct iio_dev *indio_dev); -/** - * iio_buffer_read_length() - attr func to get number of datums in the buffer - **/ -ssize_t iio_buffer_read_length(struct device *dev, - struct device_attribute *attr, - char *buf); -/** - * iio_buffer_write_length() - attr func to set number of datums in the buffer - **/ -ssize_t iio_buffer_write_length(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len); -/** - * iio_buffer_store_enable() - attr to turn the buffer on - **/ -ssize_t iio_buffer_store_enable(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len); -/** - * iio_buffer_show_enable() - attr to see if the buffer is on - **/ -ssize_t iio_buffer_show_enable(struct device *dev, - struct device_attribute *attr, - char *buf); -#define IIO_BUFFER_LENGTH_ATTR DEVICE_ATTR(length, S_IRUGO | S_IWUSR, \ - iio_buffer_read_length, \ - iio_buffer_write_length) - -#define IIO_BUFFER_ENABLE_ATTR DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, \ - iio_buffer_show_enable, \ - iio_buffer_store_enable) - bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, const unsigned long *mask); -- cgit v1.3 From 374956600ecbedf5ca29c76bde114160eb805091 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 26 Nov 2014 18:55:17 +0100 Subject: iio: buffer: Drop get_length callback We already do have the length field in the struct iio_buffer which is expected to be in sync with the current size of the buffer. And currently all implementations of the get_length callback either return this field or a constant number. This patch removes the get_length callback and replaces all occurrences in the IIO core with directly accessing the length field of the buffer. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-buffer.c | 11 +++-------- drivers/iio/kfifo_buf.c | 6 ------ drivers/staging/iio/Documentation/ring.txt | 4 ++-- drivers/staging/iio/accel/sca3000_ring.c | 8 +------- include/linux/iio/buffer.h | 2 -- 5 files changed, 6 insertions(+), 25 deletions(-) (limited to 'include/linux/iio/buffer.h') diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 4ca4c0a09923..2bd8d399f2ec 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -390,11 +390,7 @@ static ssize_t iio_buffer_read_length(struct device *dev, struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_buffer *buffer = indio_dev->buffer; - if (buffer->access->get_length) - return sprintf(buf, "%d\n", - buffer->access->get_length(buffer)); - - return 0; + return sprintf(buf, "%d\n", buffer->length); } static ssize_t iio_buffer_write_length(struct device *dev, @@ -410,9 +406,8 @@ static ssize_t iio_buffer_write_length(struct device *dev, if (ret) return ret; - if (buffer->access->get_length) - if (val == buffer->access->get_length(buffer)) - return len; + if (val == buffer->length) + return len; mutex_lock(&indio_dev->mlock); if (iio_buffer_is_active(indio_dev->buffer)) { diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 3b0a3bc4f0ad..b20a9cfbc8ed 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -47,11 +47,6 @@ static int iio_request_update_kfifo(struct iio_buffer *r) return ret; } -static int iio_get_length_kfifo(struct iio_buffer *r) -{ - return r->length; -} - static int iio_mark_update_needed_kfifo(struct iio_buffer *r) { struct iio_kfifo *kf = iio_to_kfifo(r); @@ -141,7 +136,6 @@ static const struct iio_buffer_access_funcs kfifo_access_funcs = { .data_available = iio_kfifo_buf_data_available, .request_update = &iio_request_update_kfifo, .set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo, - .get_length = &iio_get_length_kfifo, .set_length = &iio_set_length_kfifo, .release = &iio_kfifo_buffer_release, }; diff --git a/drivers/staging/iio/Documentation/ring.txt b/drivers/staging/iio/Documentation/ring.txt index 434d63a6123a..18718fcaf259 100644 --- a/drivers/staging/iio/Documentation/ring.txt +++ b/drivers/staging/iio/Documentation/ring.txt @@ -42,6 +42,6 @@ request_update set_bytes_per_datum Set the number of bytes for a complete scan. (All samples + timestamp) -get_length / set_length - Get/set the number of complete scans that may be held by the buffer. +set_length + Set the number of complete scans that may be held by the buffer. diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c index f2f260e01550..f76a26885808 100644 --- a/drivers/staging/iio/accel/sca3000_ring.c +++ b/drivers/staging/iio/accel/sca3000_ring.c @@ -129,12 +129,6 @@ error_ret: return ret ? ret : num_read; } -/* This is only valid with all 3 elements enabled */ -static int sca3000_ring_get_length(struct iio_buffer *r) -{ - return 64; -} - static bool sca3000_ring_buf_data_available(struct iio_buffer *r) { return r->stufftoread; @@ -248,6 +242,7 @@ static struct iio_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev) ring->private = indio_dev; buf = &ring->buf; buf->stufftoread = 0; + buf->length = 64; buf->attrs = sca3000_ring_attributes; iio_buffer_init(buf); @@ -261,7 +256,6 @@ static void sca3000_ring_release(struct iio_buffer *r) static const struct iio_buffer_access_funcs sca3000_ring_access_funcs = { .read_first_n = &sca3000_read_first_n_hw_rb, - .get_length = &sca3000_ring_get_length, .data_available = sca3000_ring_buf_data_available, .release = sca3000_ring_release, }; diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 16b7663036f2..b65850a41127 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -26,7 +26,6 @@ struct iio_buffer; * @request_update: if a parameter change has been marked, update underlying * storage. * @set_bytes_per_datum:set number of bytes per datum - * @get_length: get number of datums in buffer * @set_length: set number of datums in buffer * @release: called when the last reference to the buffer is dropped, * should free all resources allocated by the buffer. @@ -49,7 +48,6 @@ struct iio_buffer_access_funcs { int (*request_update)(struct iio_buffer *buffer); int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd); - int (*get_length)(struct iio_buffer *buffer); int (*set_length)(struct iio_buffer *buffer, int length); void (*release)(struct iio_buffer *buffer); -- cgit v1.3