diff options
| -rw-r--r-- | drivers/staging/iio/adc/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/staging/iio/adc/ad7298.h | 5 | ||||
| -rw-r--r-- | drivers/staging/iio/adc/ad7298_core.c | 15 | ||||
| -rw-r--r-- | drivers/staging/iio/adc/ad7298_ring.c | 64 |
4 files changed, 20 insertions, 66 deletions
diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig index 7cdf421..bb6fffd 100644 --- a/drivers/staging/iio/adc/Kconfig +++ b/drivers/staging/iio/adc/Kconfig @@ -13,7 +13,7 @@ config AD7291 config AD7298 tristate "Analog Devices AD7298 ADC driver" depends on SPI - select IIO_KFIFO_BUF if IIO_BUFFER + select IIO_TRIGGERED_BUFFER if IIO_BUFFER help Say yes here to build support for Analog Devices AD7298 8 Channel ADC with temperature sensor. diff --git a/drivers/staging/iio/adc/ad7298.h b/drivers/staging/iio/adc/ad7298.h index 5051a7e..18f2787 100644 --- a/drivers/staging/iio/adc/ad7298.h +++ b/drivers/staging/iio/adc/ad7298.h @@ -55,6 +55,8 @@ struct ad7298_state { #ifdef CONFIG_IIO_BUFFER int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev); void ad7298_ring_cleanup(struct iio_dev *indio_dev); +int ad7298_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *active_scan_mask); #else /* CONFIG_IIO_BUFFER */ static inline int @@ -66,5 +68,8 @@ ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev) static inline void ad7298_ring_cleanup(struct iio_dev *indio_dev) { } + +#define ad7298_update_scan_mode NULL + #endif /* CONFIG_IIO_BUFFER */ #endif /* IIO_ADC_AD7298_H_ */ diff --git a/drivers/staging/iio/adc/ad7298_core.c b/drivers/staging/iio/adc/ad7298_core.c index c90f2b3..6141f4a 100644 --- a/drivers/staging/iio/adc/ad7298_core.c +++ b/drivers/staging/iio/adc/ad7298_core.c @@ -45,8 +45,8 @@ static struct iio_chan_spec ad7298_channels[] = { .channel = 0, .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | IIO_CHAN_INFO_SCALE_SEPARATE_BIT, - .address = 9, - .scan_index = AD7298_CH_TEMP, + .address = AD7298_CH_TEMP, + .scan_index = -1, .scan_type = { .sign = 's', .realbits = 32, @@ -171,6 +171,7 @@ static int ad7298_read_raw(struct iio_dev *indio_dev, static const struct iio_info ad7298_info = { .read_raw = &ad7298_read_raw, + .update_scan_mode = ad7298_update_scan_mode, .driver_module = THIS_MODULE, }; @@ -231,19 +232,12 @@ static int __devinit ad7298_probe(struct spi_device *spi) if (ret) goto error_disable_reg; - ret = iio_buffer_register(indio_dev, - &ad7298_channels[1], /* skip temp0 */ - ARRAY_SIZE(ad7298_channels) - 1); - if (ret) - goto error_cleanup_ring; ret = iio_device_register(indio_dev); if (ret) - goto error_unregister_ring; + goto error_cleanup_ring; return 0; -error_unregister_ring: - iio_buffer_unregister(indio_dev); error_cleanup_ring: ad7298_ring_cleanup(indio_dev); error_disable_reg: @@ -263,7 +257,6 @@ static int __devexit ad7298_remove(struct spi_device *spi) struct ad7298_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); - iio_buffer_unregister(indio_dev); ad7298_ring_cleanup(indio_dev); if (!IS_ERR(st->reg)) { regulator_disable(st->reg); diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c index 908a3e5..cd3e9cb 100644 --- a/drivers/staging/iio/adc/ad7298_ring.c +++ b/drivers/staging/iio/adc/ad7298_ring.c @@ -13,37 +13,29 @@ #include <linux/iio/iio.h> #include <linux/iio/buffer.h> -#include <linux/iio/kfifo_buf.h> #include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> #include "ad7298.h" /** - * ad7298_ring_preenable() setup the parameters of the ring before enabling - * - * The complex nature of the setting of the number of bytes per datum is due - * to this driver currently ensuring that the timestamp is stored at an 8 - * byte boundary. + * ad7298_update_scan_mode() setup the spi transfer buffer for the new scan mask **/ -static int ad7298_ring_preenable(struct iio_dev *indio_dev) +int ad7298_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *active_scan_mask) { struct ad7298_state *st = iio_priv(indio_dev); int i, m; unsigned short command; - int scan_count, ret; - - ret = iio_sw_buffer_preenable(indio_dev); - if (ret < 0) - return ret; + int scan_count; /* Now compute overall size */ - scan_count = bitmap_weight(indio_dev->active_scan_mask, - indio_dev->masklength); + scan_count = bitmap_weight(active_scan_mask, indio_dev->masklength); command = AD7298_WRITE | st->ext_ref; for (i = 0, m = AD7298_CH(0); i < AD7298_MAX_CHAN; i++, m >>= 1) - if (test_bit(i, indio_dev->active_scan_mask)) + if (test_bit(i, active_scan_mask)) command |= m; st->tx_buf[0] = cpu_to_be16(command); @@ -108,49 +100,13 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p) return IRQ_HANDLED; } -static const struct iio_buffer_setup_ops ad7298_ring_setup_ops = { - .preenable = &ad7298_ring_preenable, - .postenable = &iio_triggered_buffer_postenable, - .predisable = &iio_triggered_buffer_predisable, -}; - int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev) { - int ret; - - indio_dev->buffer = iio_kfifo_allocate(indio_dev); - if (!indio_dev->buffer) { - ret = -ENOMEM; - goto error_ret; - } - indio_dev->pollfunc = iio_alloc_pollfunc(NULL, - &ad7298_trigger_handler, - IRQF_ONESHOT, - indio_dev, - "ad7298_consumer%d", - indio_dev->id); - - if (indio_dev->pollfunc == NULL) { - ret = -ENOMEM; - goto error_deallocate_kfifo; - } - - /* Ring buffer functions - here trigger setup related */ - indio_dev->setup_ops = &ad7298_ring_setup_ops; - indio_dev->buffer->scan_timestamp = true; - - /* Flag that polled ring buffering is possible */ - indio_dev->modes |= INDIO_BUFFER_TRIGGERED; - return 0; - -error_deallocate_kfifo: - iio_kfifo_free(indio_dev->buffer); -error_ret: - return ret; + return iio_triggered_buffer_setup(indio_dev, NULL, + &ad7298_trigger_handler, NULL); } void ad7298_ring_cleanup(struct iio_dev *indio_dev) { - iio_dealloc_pollfunc(indio_dev->pollfunc); - iio_kfifo_free(indio_dev->buffer); + iio_triggered_buffer_cleanup(indio_dev); } |