From 8a27a023f8f66a8361c5e3d8160a690f480479ec Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Wed, 18 May 2011 14:42:07 +0100 Subject: [PATCH] staging:iio:meter:ade7758: Use iio channel spec and miscellaneous other changes. Use iio channel spec for the ring buffer channels. Add/update file comment/license headers. Use available_scan_masks to prevent that multiple channels are enabled. Remove wavefrom type attributes. (no handled directly by the scan_elements) Use SPI_MODE_1. Move ade7758_initial_setup() before ade7758_probe_trigger() to ensure the ADE7758 interrupt is disabled when the host interrupt get's enabled. Add spi_device_id. Update ring buffer setup. Some backporting needed to ensure driver builds all the way through core changes. Signed-off-by: Michael Hennerich Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/meter/ade7758.h | 66 ++++--- drivers/staging/iio/meter/ade7758_core.c | 173 ++++++++--------- drivers/staging/iio/meter/ade7758_ring.c | 231 ++++++++++++----------- 3 files changed, 258 insertions(+), 212 deletions(-) diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h index 169982b228a7..372a9f62b3b2 100644 --- a/drivers/staging/iio/meter/ade7758.h +++ b/drivers/staging/iio/meter/ade7758.h @@ -1,3 +1,11 @@ +/* + * ADE7758 Poly Phase Multifunction Energy Metering IC driver + * + * Copyright 2010-2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + #ifndef _ADE7758_H #define _ADE7758_H @@ -83,12 +91,23 @@ #define ADE7758_MAX_RX 4 #define ADE7758_STARTUP_DELAY 1 -#define ADE7758_SPI_SLOW (u32)(300 * 1000) -#define ADE7758_SPI_BURST (u32)(1000 * 1000) -#define ADE7758_SPI_FAST (u32)(2000 * 1000) +#define AD7758_NUM_WAVSEL 5 +#define AD7758_NUM_PHSEL 3 +#define AD7758_NUM_WAVESRC (AD7758_NUM_WAVSEL * AD7758_NUM_PHSEL) + +#define AD7758_PHASE_A 0 +#define AD7758_PHASE_B 1 +#define AD7758_PHASE_C 2 +#define AD7758_CURRENT 0 +#define AD7758_VOLTAGE 1 +#define AD7758_ACT_PWR 2 +#define AD7758_REACT_PWR 3 +#define AD7758_APP_PWR 4 +#define AD7758_WT(p, w) (((w) << 2) | (p)) #define DRIVER_NAME "ade7758" + /** * struct ade7758_state - device instance specific data * @us: actual spi_device @@ -99,22 +118,29 @@ * @buf_lock: mutex to protect tx and rx **/ struct ade7758_state { - struct spi_device *us; - struct iio_dev *indio_dev; - struct iio_trigger *trig; - u8 *tx; - u8 *rx; - struct mutex buf_lock; + struct spi_device *us; + struct iio_dev *indio_dev; + struct iio_trigger *trig; + u8 *tx; + u8 *rx; + struct mutex buf_lock; + u32 available_scan_masks[AD7758_NUM_WAVESRC]; + struct iio_chan_spec *ade7758_ring_channels; + struct spi_transfer ring_xfer[4]; + struct spi_message ring_msg; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + unsigned char rx_buf[8] ____cacheline_aligned; + unsigned char tx_buf[8]; + }; #ifdef CONFIG_IIO_RING_BUFFER /* At the moment triggers are only used for ring buffer * filling. This may change! */ -enum ade7758_scan { - ADE7758_SCAN_WFORM, -}; - void ade7758_remove_trigger(struct iio_dev *indio_dev); int ade7758_probe_trigger(struct iio_dev *indio_dev); @@ -129,6 +155,12 @@ void ade7758_unconfigure_ring(struct iio_dev *indio_dev); int ade7758_initialize_ring(struct iio_ring_buffer *ring); void ade7758_uninitialize_ring(struct iio_ring_buffer *ring); int ade7758_set_irq(struct device *dev, bool enable); + +int ade7758_spi_write_reg_8(struct device *dev, + u8 reg_address, u8 val); +int ade7758_spi_read_reg_8(struct device *dev, + u8 reg_address, u8 *val); + #else /* CONFIG_IIO_RING_BUFFER */ static inline void ade7758_remove_trigger(struct iio_dev *indio_dev) @@ -139,14 +171,6 @@ static inline int ade7758_probe_trigger(struct iio_dev *indio_dev) return 0; } -static inline ssize_t -ade7758_read_data_from_ring(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - return 0; -} - static int ade7758_configure_ring(struct iio_dev *indio_dev) { return 0; diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c index 26ff31b5f75d..42682ad0b26c 100644 --- a/drivers/staging/iio/meter/ade7758_core.c +++ b/drivers/staging/iio/meter/ade7758_core.c @@ -20,10 +20,11 @@ #include "../iio.h" #include "../sysfs.h" +#include "../ring_generic.h" #include "meter.h" #include "ade7758.h" -static int ade7758_spi_write_reg_8(struct device *dev, +int ade7758_spi_write_reg_8(struct device *dev, u8 reg_address, u8 val) { @@ -490,7 +491,7 @@ static int ade7758_initial_setup(struct ade7758_state *st) struct device *dev = &st->indio_dev->dev; /* use low spi speed for init */ - st->us->mode = SPI_MODE_3; + st->us->mode = SPI_MODE_1; spi_setup(st->us); /* Disable IRQ */ @@ -580,63 +581,6 @@ out: return ret ? ret : len; } -static ssize_t ade7758_read_waveform_type(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret, len = 0; - u8 t; - ret = ade7758_spi_read_reg_8(dev, - ADE7758_WAVMODE, - &t); - if (ret) - return ret; - - t = (t >> 2) & 0x7; - - len = sprintf(buf, "%d\n", t); - - return len; -} - -static ssize_t ade7758_write_waveform_type(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - unsigned long val; - int ret; - u8 reg; - - ret = strict_strtol(buf, 10, &val); - if (ret) - return ret; - - if (val > 4) - return -EINVAL; - - mutex_lock(&indio_dev->mlock); - - ret = ade7758_spi_read_reg_8(dev, - ADE7758_WAVMODE, - ®); - if (ret) - goto out; - - reg &= ~(7 << 2); - reg |= val << 2; - - ret = ade7758_spi_write_reg_8(dev, - ADE7758_WAVMODE, - reg); - -out: - mutex_unlock(&indio_dev->mlock); - - return ret ? ret : len; -} - static IIO_DEV_ATTR_TEMP_RAW(ade7758_read_8bit); static IIO_CONST_ATTR(temp_offset, "129 C"); static IIO_CONST_ATTR(temp_scale, "4 C"); @@ -664,19 +608,6 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, ade7758_read_frequency, ade7758_write_frequency); -/** - * IIO_DEV_ATTR_WAVEFORM_TYPE - set the type of waveform. - * @_mode: sysfs file mode/permissions - * @_show: output method for the attribute - * @_store: input method for the attribute - **/ -#define IIO_DEV_ATTR_WAVEFORM_TYPE(_mode, _show, _store) \ - IIO_DEVICE_ATTR(waveform_type, _mode, _show, _store, 0) - -static IIO_DEV_ATTR_WAVEFORM_TYPE(S_IWUSR | S_IRUGO, - ade7758_read_waveform_type, - ade7758_write_waveform_type); - static IIO_DEV_ATTR_RESET(ade7758_write_reset); static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26040 13020 6510 3255"); @@ -686,7 +617,6 @@ static struct attribute *ade7758_attributes[] = { &iio_const_attr_temp_offset.dev_attr.attr, &iio_const_attr_temp_scale.dev_attr.attr, &iio_dev_attr_sampling_frequency.dev_attr.attr, - &iio_dev_attr_waveform_type.dev_attr.attr, &iio_const_attr_sampling_frequency_available.dev_attr.attr, &iio_dev_attr_reset.dev_attr.attr, &iio_dev_attr_awatthr.dev_attr.attr, @@ -730,11 +660,73 @@ static const struct attribute_group ade7758_attribute_group = { .attrs = ade7758_attributes, }; - +static struct iio_chan_spec ade7758_channels[] = { + IIO_CHAN(IIO_IN, 0, 1, 0, "raw", 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_A, AD7758_VOLTAGE), + 0, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_A, AD7758_CURRENT), + 1, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_A, AD7758_APP_PWR), + 2, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_A, AD7758_ACT_PWR), + 3, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_A, AD7758_REACT_PWR), + 4, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_IN, 0, 1, 0, "raw", 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_B, AD7758_VOLTAGE), + 5, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_B, AD7758_CURRENT), + 6, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_B, AD7758_APP_PWR), + 7, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_B, AD7758_ACT_PWR), + 8, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_B, AD7758_REACT_PWR), + 9, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_IN, 0, 1, 0, "raw", 2, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_C, AD7758_VOLTAGE), + 10, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 2, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_C, AD7758_CURRENT), + 11, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 2, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_C, AD7758_APP_PWR), + 12, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 2, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_C, AD7758_ACT_PWR), + 13, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 2, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + AD7758_WT(AD7758_PHASE_C, AD7758_REACT_PWR), + 14, IIO_ST('s', 24, 32, 0), 0), + IIO_CHAN_SOFT_TIMESTAMP(15), +}; static int __devinit ade7758_probe(struct spi_device *spi) { - int ret, regdone = 0; + int i, ret, regdone = 0; struct ade7758_state *st = kzalloc(sizeof *st, GFP_KERNEL); if (!st) { ret = -ENOMEM; @@ -755,6 +747,7 @@ static int __devinit ade7758_probe(struct spi_device *spi) goto error_free_rx; } st->us = spi; + st->ade7758_ring_channels = &ade7758_channels[0]; mutex_init(&st->buf_lock); /* setup the industrialio driver allocated elements */ st->indio_dev = iio_allocate_device(0); @@ -770,6 +763,11 @@ static int __devinit ade7758_probe(struct spi_device *spi) st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; + for (i = 0; i < AD7758_NUM_WAVESRC; i++) + st->available_scan_masks[i] = 1 << i; + + st->indio_dev->available_scan_masks = st->available_scan_masks; + ret = ade7758_configure_ring(st->indio_dev); if (ret) goto error_free_dev; @@ -779,22 +777,25 @@ static int __devinit ade7758_probe(struct spi_device *spi) goto error_unreg_ring_funcs; regdone = 1; - ret = ade7758_initialize_ring(st->indio_dev->ring); + ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0, + &ade7758_channels[0], + ARRAY_SIZE(ade7758_channels)); if (ret) { - printk(KERN_ERR "failed to initialize the ring\n"); + 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(st); + if (ret) + goto error_uninitialize_ring; + if (spi->irq) { ret = ade7758_probe_trigger(st->indio_dev); if (ret) - goto error_uninitialize_ring; + goto error_remove_trigger; } - /* Get the device into a sane initial state */ - ret = ade7758_initial_setup(st); - if (ret) - goto error_remove_trigger; return 0; error_remove_trigger: @@ -829,8 +830,6 @@ static int ade7758_remove(struct spi_device *spi) if (ret) goto err_ret; - flush_scheduled_work(); - ade7758_remove_trigger(indio_dev); ade7758_uninitialize_ring(indio_dev->ring); iio_device_unregister(indio_dev); @@ -845,6 +844,11 @@ err_ret: return ret; } +static const struct spi_device_id ade7758_id[] = { + {"ade7758", 0}, + {} +}; + static struct spi_driver ade7758_driver = { .driver = { .name = "ade7758", @@ -852,6 +856,7 @@ static struct spi_driver ade7758_driver = { }, .probe = ade7758_probe, .remove = __devexit_p(ade7758_remove), + .id_table = ade7758_id, }; static __init int ade7758_init(void) diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c index 2c9865d24f35..c8ebfd2fd9e3 100644 --- a/drivers/staging/iio/meter/ade7758_ring.c +++ b/drivers/staging/iio/meter/ade7758_ring.c @@ -1,3 +1,10 @@ +/* + * ADE7758 Poly Phase Multifunction Energy Metering IC driver + * + * Copyright 2010-2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ #include #include #include @@ -9,6 +16,7 @@ #include #include #include +#include #include "../iio.h" #include "../sysfs.h" @@ -18,82 +26,40 @@ #include "ade7758.h" /** - * combine_8_to_32() utility function to munge to u8s into u32 - **/ -static inline u32 combine_8_to_32(u8 lower, u8 mid, u8 upper) -{ - u32 _lower = lower; - u32 _mid = mid; - u32 _upper = upper; - - return _lower | (_mid << 8) | (_upper << 16); -} - -static IIO_SCAN_EL_C(wform, ADE7758_SCAN_WFORM, ADE7758_WFORM, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(wform, s, 24, 32); -static IIO_SCAN_EL_TIMESTAMP(1); -static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64); - -static struct attribute *ade7758_scan_el_attrs[] = { - &iio_scan_el_wform.dev_attr.attr, - &iio_const_attr_wform_index.dev_attr.attr, - &iio_const_attr_wform_type.dev_attr.attr, - &iio_scan_el_timestamp.dev_attr.attr, - &iio_const_attr_timestamp_index.dev_attr.attr, - &iio_const_attr_timestamp_type.dev_attr.attr, - NULL, -}; - -static struct attribute_group ade7758_scan_el_group = { - .attrs = ade7758_scan_el_attrs, - .name = "scan_elements", -}; - -/** - * ade7758_spi_read_burst() - read all data registers + * ade7758_spi_read_burst() - read data registers * @dev: device associated with child of actual device (iio_dev or iio_trig) - * @rx: somewhere to pass back the value read (min size is 24 bytes) **/ -static int ade7758_spi_read_burst(struct device *dev, u8 *rx) +static int ade7758_spi_read_burst(struct device *dev) { - struct spi_message msg; struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ade7758_state *st = iio_dev_get_devdata(indio_dev); int ret; - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .rx_buf = rx, - .bits_per_word = 8, - .len = 4, - }, { - .tx_buf = st->tx + 4, - .rx_buf = rx, - .bits_per_word = 8, - .len = 4, - }, - }; - - mutex_lock(&st->buf_lock); - st->tx[0] = ADE7758_READ_REG(ADE7758_RSTATUS); - st->tx[1] = 0; - st->tx[2] = 0; - st->tx[3] = 0; - st->tx[4] = ADE7758_READ_REG(ADE7758_WFORM); - st->tx[5] = 0; - st->tx[6] = 0; - st->tx[7] = 0; - - spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); - ret = spi_sync(st->us, &msg); + ret = spi_sync(st->us, &st->ring_msg); if (ret) dev_err(&st->us->dev, "problem when reading WFORM value\n"); - mutex_unlock(&st->buf_lock); + return ret; +} + +static int ade7758_write_waveform_type(struct device *dev, unsigned 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; } @@ -106,41 +72,70 @@ static irqreturn_t ade7758_trigger_handler(int irq, void *p) struct iio_dev *indio_dev = pf->private_data; struct iio_ring_buffer *ring = indio_dev->ring; struct ade7758_state *st = iio_dev_get_devdata(indio_dev); - int i = 0; - s32 *data; - size_t datasize = ring->access.get_bytes_per_datum(ring); - - data = kmalloc(datasize, GFP_KERNEL); - if (data == NULL) { - dev_err(&st->us->dev, "memory alloc failed in ring bh"); - return -ENOMEM; - } + s64 dat64[2]; + u32 *dat32 = (u32 *)dat64; if (ring->scan_count) - if (ade7758_spi_read_burst(&st->indio_dev->dev, st->rx) >= 0) - for (; i < ring->scan_count; i++) - data[i] = combine_8_to_32(st->rx[i*2+2], - st->rx[i*2+1], - st->rx[i*2]); + if (ade7758_spi_read_burst(&st->indio_dev->dev) >= 0) + *dat32 = get_unaligned_be32(&st->rx_buf[5]) & 0xFFFFFF; /* Guaranteed to be aligned with 8 byte boundary */ if (ring->scan_timestamp) - *((s64 *) - (((u32)data + 4 * ring->scan_count + 4) & ~0x7)) = - pf->timestamp; + dat64[1] = pf->timestamp; - ring->access.store_to(ring, - (u8 *)data, - pf->timestamp); + ring->access.store_to(ring, (u8 *)dat64, pf->timestamp); iio_trigger_notify_done(st->indio_dev->trig); - kfree(data); return IRQ_HANDLED; } +/** + * ade7758_ring_preenable() setup the parameters of the ring before enabling + * + * The complex nature of the setting of the nuber 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) +{ + struct ade7758_state *st = indio_dev->dev_data; + struct iio_ring_buffer *ring = indio_dev->ring; + size_t d_size; + unsigned channel; + + if (!ring->scan_count) + return -EINVAL; + + channel = __ffs(ring->scan_mask); + + d_size = st->ade7758_ring_channels[channel].scan_type.storagebits / 8; + + if (ring->scan_timestamp) { + d_size += sizeof(s64); + + if (d_size % sizeof(s64)) + d_size += sizeof(s64) - (d_size % sizeof(s64)); + } + + if (indio_dev->ring->access.set_bytes_per_datum) + indio_dev->ring->access.set_bytes_per_datum(indio_dev->ring, + d_size); + + ade7758_write_waveform_type(&indio_dev->dev, + st->ade7758_ring_channels[channel].address); + + return 0; +} + void ade7758_unconfigure_ring(struct iio_dev *indio_dev) { + /* ensure that the trigger has been detached */ + if (indio_dev->trig) { + iio_put_trigger(indio_dev->trig); + iio_trigger_dettach_poll_func(indio_dev->trig, + indio_dev->pollfunc); + } kfree(indio_dev->pollfunc->name); kfree(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); @@ -148,34 +143,28 @@ void ade7758_unconfigure_ring(struct iio_dev *indio_dev) int ade7758_configure_ring(struct iio_dev *indio_dev) { + struct ade7758_state *st = indio_dev->dev_data; int ret = 0; - struct iio_ring_buffer *ring; - ring = iio_sw_rb_allocate(indio_dev); - if (!ring) { + indio_dev->ring = iio_sw_rb_allocate(indio_dev); + if (!indio_dev->ring) { ret = -ENOMEM; return ret; } - indio_dev->ring = ring; + /* Effectively select the ring buffer implementation */ - iio_ring_sw_register_funcs(&ring->access); - ring->bpe = 4; - ring->scan_el_attrs = &ade7758_scan_el_group; - ring->scan_timestamp = true; - ring->preenable = &iio_sw_ring_preenable; - ring->postenable = &iio_triggered_ring_postenable; - ring->predisable = &iio_triggered_ring_predisable; - ring->owner = THIS_MODULE; - - /* Set default scan mode */ - iio_scan_mask_set(ring, iio_scan_el_wform.number); + iio_ring_sw_register_funcs(&indio_dev->ring->access); + indio_dev->ring->preenable = &ade7758_ring_preenable; + indio_dev->ring->postenable = &iio_triggered_ring_postenable; + indio_dev->ring->predisable = &iio_triggered_ring_predisable; + indio_dev->ring->owner = THIS_MODULE; indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL); if (indio_dev->pollfunc == NULL) { ret = -ENOMEM; goto error_iio_sw_rb_free; } - indio_dev->pollfunc->private_data = indio_dev->ring; + indio_dev->pollfunc->private_data = indio_dev; indio_dev->pollfunc->h = &iio_pollfunc_store_time; indio_dev->pollfunc->thread = &ade7758_trigger_handler; indio_dev->pollfunc->name @@ -186,6 +175,39 @@ int ade7758_configure_ring(struct iio_dev *indio_dev) } indio_dev->modes |= INDIO_RING_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_free_pollfunc: @@ -195,11 +217,6 @@ error_iio_sw_rb_free: return ret; } -int ade7758_initialize_ring(struct iio_ring_buffer *ring) -{ - return iio_ring_buffer_register(ring, 0); -} - void ade7758_uninitialize_ring(struct iio_ring_buffer *ring) { iio_ring_buffer_unregister(ring); -- 2.20.1