General cleanup and use of standard functions to simplfy some spi reads as well. Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxx> Acked-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> --- drivers/staging/iio/meter/ade7759.c | 165 +++++++---------------------------- drivers/staging/iio/meter/ade7759.h | 65 -------------- 2 files changed, 30 insertions(+), 200 deletions(-) diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c index fafc3c1..a9d3203 100644 --- a/drivers/staging/iio/meter/ade7759.c +++ b/drivers/staging/iio/meter/ade7759.c @@ -23,7 +23,7 @@ #include "meter.h" #include "ade7759.h" -int ade7759_spi_write_reg_8(struct device *dev, +static int ade7759_spi_write_reg_8(struct device *dev, u8 reg_address, u8 val) { @@ -46,25 +46,14 @@ static int ade7759_spi_write_reg_16(struct device *dev, u16 value) { int ret; - struct spi_message msg; struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ade7759_state *st = iio_dev_get_devdata(indio_dev); - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .bits_per_word = 8, - .len = 3, - } - }; mutex_lock(&st->buf_lock); st->tx[0] = ADE7759_WRITE_REG(reg_address); st->tx[1] = (value >> 8) & 0xFF; st->tx[2] = value & 0xFF; - - spi_message_init(&msg); - spi_message_add_tail(xfers, &msg); - ret = spi_sync(st->us, &msg); + ret = spi_write(st->us, st->tx, 3); mutex_unlock(&st->buf_lock); return ret; @@ -74,73 +63,40 @@ static int ade7759_spi_read_reg_8(struct device *dev, u8 reg_address, u8 *val) { - struct spi_message msg; struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ade7759_state *st = iio_dev_get_devdata(indio_dev); int ret; - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .rx_buf = st->rx, - .bits_per_word = 8, - .len = 2, - }, - }; - mutex_lock(&st->buf_lock); - st->tx[0] = ADE7759_READ_REG(reg_address); - st->tx[1] = 0; - - spi_message_init(&msg); - spi_message_add_tail(xfers, &msg); - ret = spi_sync(st->us, &msg); - if (ret) { + ret = spi_w8r8(st->us, ADE7759_READ_REG(reg_address)); + if (ret < 0) { dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X", reg_address); - goto error_ret; + return ret; } - *val = st->rx[1]; + *val = ret; -error_ret: - mutex_unlock(&st->buf_lock); - return ret; + return 0; } static int ade7759_spi_read_reg_16(struct device *dev, u8 reg_address, u16 *val) { - struct spi_message msg; struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ade7759_state *st = iio_dev_get_devdata(indio_dev); int ret; - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .rx_buf = st->rx, - .bits_per_word = 8, - .len = 3, - }, - }; - mutex_lock(&st->buf_lock); - st->tx[0] = ADE7759_READ_REG(reg_address); - st->tx[1] = 0; - st->tx[2] = 0; - - spi_message_init(&msg); - spi_message_add_tail(xfers, &msg); - ret = spi_sync(st->us, &msg); - if (ret) { + ret = spi_w8r16(st->us, ADE7759_READ_REG(reg_address)); + if (ret < 0) { dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X", - reg_address); - goto error_ret; + reg_address); + return ret; } - *val = (st->rx[1] << 8) | st->rx[2]; -error_ret: - mutex_unlock(&st->buf_lock); - return ret; + *val = ret; + *val = be16_to_cpup(val); + + return 0; } static int ade7759_spi_read_reg_40(struct device *dev, @@ -354,27 +310,22 @@ static int ade7759_set_irq(struct device *dev, bool enable) irqen &= ~(1 << 3); ret = ade7759_spi_write_reg_8(dev, ADE7759_IRQEN, irqen); - if (ret) - goto error_ret; error_ret: return ret; } /* Power down the device */ -int ade7759_stop_device(struct device *dev) +static int ade7759_stop_device(struct device *dev) { - int ret; u16 val; + ade7759_spi_read_reg_16(dev, ADE7759_MODE, &val); val |= 1 << 4; /* AD converters can be turned off */ - ret = ade7759_spi_write_reg_16(dev, - ADE7759_MODE, - val); - return ret; + return ade7759_spi_write_reg_16(dev, ADE7759_MODE, val); } static int ade7759_initial_setup(struct ade7759_state *st) @@ -404,7 +355,7 @@ static ssize_t ade7759_read_frequency(struct device *dev, struct device_attribute *attr, char *buf) { - int ret, len = 0; + int ret; u16 t; int sps; ret = ade7759_spi_read_reg_16(dev, @@ -416,8 +367,7 @@ static ssize_t ade7759_read_frequency(struct device *dev, t = (t >> 3) & 0x3; sps = 27900 / (1 + t); - len = sprintf(buf, "%d SPS\n", sps); - return len; + return sprintf(buf, "%d\n", sps); } static ssize_t ade7759_write_frequency(struct device *dev, @@ -446,18 +396,14 @@ static ssize_t ade7759_write_frequency(struct device *dev, else st->us->max_speed_hz = ADE7759_SPI_FAST; - ret = ade7759_spi_read_reg_16(dev, - ADE7759_MODE, - ®); + ret = ade7759_spi_read_reg_16(dev, ADE7759_MODE, ®); if (ret) goto out; reg &= ~(3 << 13); reg |= t << 13; - ret = ade7759_spi_write_reg_16(dev, - ADE7759_MODE, - reg); + ret = ade7759_spi_write_reg_16(dev, ADE7759_MODE, reg); out: mutex_unlock(&indio_dev->mlock); @@ -478,14 +424,6 @@ static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500"); static IIO_CONST_ATTR(name, "ade7759"); -static struct attribute *ade7759_event_attributes[] = { - NULL -}; - -static struct attribute_group ade7759_event_attribute_group = { - .attrs = ade7759_event_attributes, -}; - static struct attribute *ade7759_attributes[] = { &iio_dev_attr_temp_raw.dev_attr.attr, &iio_const_attr_temp_offset.dev_attr.attr, @@ -517,7 +455,7 @@ static const struct attribute_group ade7759_attribute_group = { static int __devinit ade7759_probe(struct spi_device *spi) { - int ret, regdone = 0; + int ret; struct ade7759_state *st = kzalloc(sizeof *st, GFP_KERNEL); if (!st) { ret = -ENOMEM; @@ -548,62 +486,27 @@ static int __devinit ade7759_probe(struct spi_device *spi) st->indio_dev->dev.parent = &spi->dev; st->indio_dev->num_interrupt_lines = 1; - st->indio_dev->event_attrs = &ade7759_event_attribute_group; + st->indio_dev->attrs = &ade7759_attribute_group; st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; - ret = ade7759_configure_ring(st->indio_dev); - if (ret) - goto error_free_dev; - ret = iio_device_register(st->indio_dev); if (ret) - goto error_unreg_ring_funcs; - regdone = 1; - - ret = ade7759_initialize_ring(st->indio_dev->ring); - if (ret) { - printk(KERN_ERR "failed to initialize the ring\n"); - goto error_unreg_ring_funcs; - } - - if (spi->irq) { - ret = iio_register_interrupt_line(spi->irq, - st->indio_dev, - 0, - IRQF_TRIGGER_FALLING, - "ade7759"); - if (ret) - goto error_uninitialize_ring; - - ret = ade7759_probe_trigger(st->indio_dev); - if (ret) - goto error_unregister_line; - } + goto error_free_dev; /* Get the device into a sane initial state */ ret = ade7759_initial_setup(st); if (ret) - goto error_remove_trigger; + goto error_unreg_dev; return 0; -error_remove_trigger: - if (st->indio_dev->modes & INDIO_RING_TRIGGERED) - ade7759_remove_trigger(st->indio_dev); -error_unregister_line: - if (st->indio_dev->modes & INDIO_RING_TRIGGERED) - iio_unregister_interrupt_line(st->indio_dev, 0); -error_uninitialize_ring: - ade7759_uninitialize_ring(st->indio_dev->ring); -error_unreg_ring_funcs: - ade7759_unconfigure_ring(st->indio_dev); + +error_unreg_dev: + iio_device_unregister(st->indio_dev); error_free_dev: - if (regdone) - iio_device_unregister(st->indio_dev); - else - iio_free_device(st->indio_dev); + iio_free_device(st->indio_dev); error_free_tx: kfree(st->tx); error_free_rx: @@ -625,14 +528,6 @@ static int ade7759_remove(struct spi_device *spi) if (ret) goto err_ret; - flush_scheduled_work(); - - ade7759_remove_trigger(indio_dev); - if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) - iio_unregister_interrupt_line(indio_dev, 0); - - ade7759_uninitialize_ring(indio_dev->ring); - ade7759_unconfigure_ring(indio_dev); iio_device_unregister(indio_dev); kfree(st->tx); kfree(st->rx); diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h index 813dea2..e9d1c43 100644 --- a/drivers/staging/iio/meter/ade7759.h +++ b/drivers/staging/iio/meter/ade7759.h @@ -41,82 +41,17 @@ /** * struct ade7759_state - device instance specific data * @us: actual spi_device - * @work_trigger_to_ring: bh for triggered event handling - * @inter: used to check if new interrupt has been triggered - * @last_timestamp: passing timestamp from th to bh of interrupt handler * @indio_dev: industrial I/O device structure - * @trig: data ready trigger registered with iio * @tx: transmit buffer * @rx: recieve buffer * @buf_lock: mutex to protect tx and rx **/ struct ade7759_state { struct spi_device *us; - struct work_struct work_trigger_to_ring; - s64 last_timestamp; struct iio_dev *indio_dev; - struct iio_trigger *trig; u8 *tx; u8 *rx; struct mutex buf_lock; }; -#if defined(CONFIG_IIO_RING_BUFFER) && defined(THIS_HAS_RING_BUFFER_SUPPORT) -/* At the moment triggers are only used for ring buffer - * filling. This may change! - */ - -enum ade7759_scan { - ADE7759_SCAN_ACTIVE_POWER, - ADE7759_SCAN_CH1_CH2, - ADE7759_SCAN_CH1, - ADE7759_SCAN_CH2, -}; - -void ade7759_remove_trigger(struct iio_dev *indio_dev); -int ade7759_probe_trigger(struct iio_dev *indio_dev); - -ssize_t ade7759_read_data_from_ring(struct device *dev, - struct device_attribute *attr, - char *buf); - - -int ade7759_configure_ring(struct iio_dev *indio_dev); -void ade7759_unconfigure_ring(struct iio_dev *indio_dev); - -int ade7759_initialize_ring(struct iio_ring_buffer *ring); -void ade7759_uninitialize_ring(struct iio_ring_buffer *ring); -#else /* CONFIG_IIO_RING_BUFFER */ - -static inline void ade7759_remove_trigger(struct iio_dev *indio_dev) -{ -} -static inline int ade7759_probe_trigger(struct iio_dev *indio_dev) -{ - return 0; -} - -static inline ssize_t -ade7759_read_data_from_ring(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - return 0; -} - -static int ade7759_configure_ring(struct iio_dev *indio_dev) -{ - return 0; -} -static inline void ade7759_unconfigure_ring(struct iio_dev *indio_dev) -{ -} -static inline int ade7759_initialize_ring(struct iio_ring_buffer *ring) -{ - return 0; -} -static inline void ade7759_uninitialize_ring(struct iio_ring_buffer *ring) -{ -} -#endif /* CONFIG_IIO_RING_BUFFER */ #endif -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html