diff options
Diffstat (limited to 'drivers/staging/iio/meter/ade7758_ring.c')
| -rw-r--r-- | drivers/staging/iio/meter/ade7758_ring.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c deleted file mode 100644 index 6d7444d6e880..000000000000 --- a/drivers/staging/iio/meter/ade7758_ring.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * ADE7758 Poly Phase Multifunction Energy Metering IC driver - * - * Copyright 2010-2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ -#include <linux/export.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/spi/spi.h> -#include <linux/slab.h> -#include <asm/unaligned.h> - -#include <linux/iio/iio.h> -#include <linux/iio/buffer.h> -#include <linux/iio/kfifo_buf.h> -#include <linux/iio/trigger_consumer.h> -#include "ade7758.h" - -/** - * ade7758_spi_read_burst() - read data registers - * @indio_dev: the IIO device - **/ -static int ade7758_spi_read_burst(struct iio_dev *indio_dev) -{ - struct ade7758_state *st = iio_priv(indio_dev); - int ret; - - ret = spi_sync(st->us, &st->ring_msg); - if (ret) - dev_err(&st->us->dev, "problem when reading WFORM value\n"); - - return ret; -} - -static int ade7758_write_waveform_type(struct device *dev, unsigned int type) -{ - int ret; - u8 reg; - - ret = ade7758_spi_read_reg_8(dev, ADE7758_WAVMODE, ®); - if (ret) - goto out; - - reg &= ~0x1F; - reg |= type & 0x1F; - - ret = ade7758_spi_write_reg_8(dev, ADE7758_WAVMODE, reg); -out: - return ret; -} - -/* Whilst this makes a lot of calls to iio_sw_ring functions - it is too device - * specific to be rolled into the core. - */ -static irqreturn_t ade7758_trigger_handler(int irq, void *p) -{ - struct iio_poll_func *pf = p; - struct iio_dev *indio_dev = pf->indio_dev; - struct ade7758_state *st = iio_priv(indio_dev); - s64 dat64[2]; - u32 *dat32 = (u32 *)dat64; - - if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)) - if (ade7758_spi_read_burst(indio_dev) >= 0) - *dat32 = get_unaligned_be32(&st->rx_buf[5]) & 0xFFFFFF; - - iio_push_to_buffers_with_timestamp(indio_dev, dat64, pf->timestamp); - - iio_trigger_notify_done(indio_dev->trig); - - return IRQ_HANDLED; -} - -/** - * ade7758_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. - **/ -static int ade7758_ring_preenable(struct iio_dev *indio_dev) -{ - unsigned int channel; - - if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)) - return -EINVAL; - - channel = find_first_bit(indio_dev->active_scan_mask, - indio_dev->masklength); - - ade7758_write_waveform_type(&indio_dev->dev, - indio_dev->channels[channel].address); - - return 0; -} - -static const struct iio_buffer_setup_ops ade7758_ring_setup_ops = { - .preenable = &ade7758_ring_preenable, - .postenable = &iio_triggered_buffer_postenable, - .predisable = &iio_triggered_buffer_predisable, - .validate_scan_mask = &iio_validate_scan_mask_onehot, -}; - -void ade7758_unconfigure_ring(struct iio_dev *indio_dev) -{ - iio_dealloc_pollfunc(indio_dev->pollfunc); - iio_kfifo_free(indio_dev->buffer); -} - -int ade7758_configure_ring(struct iio_dev *indio_dev) -{ - struct ade7758_state *st = iio_priv(indio_dev); - struct iio_buffer *buffer; - int ret = 0; - - buffer = iio_kfifo_allocate(); - if (!buffer) - return -ENOMEM; - - iio_device_attach_buffer(indio_dev, buffer); - - indio_dev->setup_ops = &ade7758_ring_setup_ops; - - indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time, - &ade7758_trigger_handler, - 0, - indio_dev, - "ade7759_consumer%d", - indio_dev->id); - if (!indio_dev->pollfunc) { - ret = -ENOMEM; - goto error_iio_kfifo_free; - } - - indio_dev->modes |= INDIO_BUFFER_TRIGGERED; - - st->tx_buf[0] = ADE7758_READ_REG(ADE7758_RSTATUS); - st->tx_buf[1] = 0; - st->tx_buf[2] = 0; - st->tx_buf[3] = 0; - st->tx_buf[4] = ADE7758_READ_REG(ADE7758_WFORM); - st->tx_buf[5] = 0; - st->tx_buf[6] = 0; - st->tx_buf[7] = 0; - - /* build spi ring message */ - st->ring_xfer[0].tx_buf = &st->tx_buf[0]; - st->ring_xfer[0].len = 1; - st->ring_xfer[0].bits_per_word = 8; - st->ring_xfer[0].delay_usecs = 4; - st->ring_xfer[1].rx_buf = &st->rx_buf[1]; - st->ring_xfer[1].len = 3; - st->ring_xfer[1].bits_per_word = 8; - st->ring_xfer[1].cs_change = 1; - - st->ring_xfer[2].tx_buf = &st->tx_buf[4]; - st->ring_xfer[2].len = 1; - st->ring_xfer[2].bits_per_word = 8; - st->ring_xfer[2].delay_usecs = 1; - st->ring_xfer[3].rx_buf = &st->rx_buf[5]; - st->ring_xfer[3].len = 3; - st->ring_xfer[3].bits_per_word = 8; - - spi_message_init(&st->ring_msg); - spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg); - spi_message_add_tail(&st->ring_xfer[1], &st->ring_msg); - spi_message_add_tail(&st->ring_xfer[2], &st->ring_msg); - spi_message_add_tail(&st->ring_xfer[3], &st->ring_msg); - - return 0; - -error_iio_kfifo_free: - iio_kfifo_free(indio_dev->buffer); - return ret; -} |