diff options
Diffstat (limited to 'drivers/staging/iio/accel/lis3l02dq_ring.c')
| -rw-r--r-- | drivers/staging/iio/accel/lis3l02dq_ring.c | 61 |
1 files changed, 15 insertions, 46 deletions
diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c index 89527af8f4c5..98c5c92d3450 100644 --- a/drivers/staging/iio/accel/lis3l02dq_ring.c +++ b/drivers/staging/iio/accel/lis3l02dq_ring.c @@ -38,38 +38,6 @@ irqreturn_t lis3l02dq_data_rdy_trig_poll(int irq, void *private) return IRQ_WAKE_THREAD; } -/** - * lis3l02dq_read_accel_from_buffer() individual acceleration read from buffer - **/ -ssize_t lis3l02dq_read_accel_from_buffer(struct iio_buffer *buffer, - int index, - int *val) -{ - int ret; - s16 *data; - - if (!iio_scan_mask_query(buffer, index)) - return -EINVAL; - - if (!buffer->access->read_last) - return -EBUSY; - - data = kmalloc(buffer->access->get_bytes_per_datum(buffer), - GFP_KERNEL); - if (data == NULL) - return -ENOMEM; - - ret = buffer->access->read_last(buffer, (u8 *)data); - if (ret) - goto error_free_data; - *val = data[bitmap_weight(buffer->scan_mask, index)]; -error_free_data: - - kfree(data); - - return ret; -} - static const u8 read_all_tx_array[] = { LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_X_L_ADDR), 0, LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_X_H_ADDR), 0, @@ -87,21 +55,21 @@ static const u8 read_all_tx_array[] = { **/ static int lis3l02dq_read_all(struct iio_dev *indio_dev, u8 *rx_array) { - struct iio_buffer *buffer = indio_dev->buffer; struct lis3l02dq_state *st = iio_priv(indio_dev); struct spi_transfer *xfers; struct spi_message msg; int ret, i, j = 0; - xfers = kzalloc((buffer->scan_count) * 2 - * sizeof(*xfers), GFP_KERNEL); + xfers = kcalloc(bitmap_weight(indio_dev->active_scan_mask, + indio_dev->masklength) * 2, + sizeof(*xfers), GFP_KERNEL); if (!xfers) return -ENOMEM; mutex_lock(&st->buf_lock); for (i = 0; i < ARRAY_SIZE(read_all_tx_array)/4; i++) - if (test_bit(i, buffer->scan_mask)) { + if (test_bit(i, indio_dev->active_scan_mask)) { /* lower byte */ xfers[j].tx_buf = st->tx + 2*j; st->tx[2*j] = read_all_tx_array[i*4]; @@ -129,7 +97,8 @@ static int lis3l02dq_read_all(struct iio_dev *indio_dev, u8 *rx_array) * values in alternate bytes */ spi_message_init(&msg); - for (j = 0; j < buffer->scan_count * 2; j++) + for (j = 0; j < bitmap_weight(indio_dev->active_scan_mask, + indio_dev->masklength) * 2; j++) spi_message_add_tail(&xfers[j], &msg); ret = spi_sync(st->us, &msg); @@ -145,14 +114,16 @@ static int lis3l02dq_get_buffer_element(struct iio_dev *indio_dev, int ret, i; u8 *rx_array ; s16 *data = (s16 *)buf; + int scan_count = bitmap_weight(indio_dev->active_scan_mask, + indio_dev->masklength); - rx_array = kzalloc(4 * (indio_dev->buffer->scan_count), GFP_KERNEL); + rx_array = kzalloc(4 * scan_count, GFP_KERNEL); if (rx_array == NULL) return -ENOMEM; ret = lis3l02dq_read_all(indio_dev, rx_array); if (ret < 0) return ret; - for (i = 0; i < indio_dev->buffer->scan_count; i++) + for (i = 0; i < scan_count; i++) data[i] = combine_8_to_16(rx_array[i*4+1], rx_array[i*4+3]); kfree(rx_array); @@ -175,7 +146,7 @@ static irqreturn_t lis3l02dq_trigger_handler(int irq, void *p) return -ENOMEM; } - if (buffer->scan_count) + if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)) len = lis3l02dq_get_buffer_element(indio_dev, data); /* Guaranteed to be aligned with 8 byte boundary */ @@ -363,17 +334,17 @@ static int lis3l02dq_buffer_postenable(struct iio_dev *indio_dev) if (ret) goto error_ret; - if (iio_scan_mask_query(indio_dev->buffer, 0)) { + if (test_bit(0, indio_dev->active_scan_mask)) { t |= LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE; oneenabled = true; } else t &= ~LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE; - if (iio_scan_mask_query(indio_dev->buffer, 1)) { + if (test_bit(1, indio_dev->active_scan_mask)) { t |= LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE; oneenabled = true; } else t &= ~LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE; - if (iio_scan_mask_query(indio_dev->buffer, 2)) { + if (test_bit(2, indio_dev->active_scan_mask)) { t |= LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE; oneenabled = true; } else @@ -437,11 +408,9 @@ int lis3l02dq_configure_buffer(struct iio_dev *indio_dev) indio_dev->buffer = buffer; /* Effectively select the buffer implementation */ indio_dev->buffer->access = &lis3l02dq_access_funcs; - buffer->bpe = 2; buffer->scan_timestamp = true; - buffer->setup_ops = &lis3l02dq_buffer_setup_ops; - buffer->owner = THIS_MODULE; + indio_dev->setup_ops = &lis3l02dq_buffer_setup_ops; /* Functions are NULL as we set handler below */ indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time, |