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/ade7754.c | 165 ++++++----------------------------- drivers/staging/iio/meter/ade7754.h | 67 -------------- 2 files changed, 26 insertions(+), 206 deletions(-) diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c index 23dedfa..4272818 100644 --- a/drivers/staging/iio/meter/ade7754.c +++ b/drivers/staging/iio/meter/ade7754.c @@ -46,25 +46,14 @@ static int ade7754_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 ade7754_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] = ADE7754_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 ade7754_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 ade7754_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] = ADE7754_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, ADE7754_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 ade7754_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 ade7754_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] = ADE7754_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, ADE7754_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 ade7754_spi_read_reg_24(struct device *dev, @@ -264,17 +220,11 @@ error_ret: static int ade7754_reset(struct device *dev) { - int ret; u8 val; - ade7754_spi_read_reg_8(dev, - ADE7754_OPMODE, - &val); - val |= 1 << 6; /* Software Chip Reset */ - ret = ade7754_spi_write_reg_8(dev, - ADE7754_OPMODE, - val); - return ret; + ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val); + val |= 1 << 6; /* Software Chip Reset */ + return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val); } @@ -431,17 +381,11 @@ error_ret: /* Power down the device */ static int ade7754_stop_device(struct device *dev) { - int ret; u8 val; - ade7754_spi_read_reg_8(dev, - ADE7754_OPMODE, - &val); - val |= 7 << 3; /* ADE7754 powered down */ - ret = ade7754_spi_write_reg_8(dev, - ADE7754_OPMODE, - val); - return ret; + ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val); + val |= 7 << 3; /* ADE7754 powered down */ + return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val); } static int ade7754_initial_setup(struct ade7754_state *st) @@ -471,7 +415,7 @@ static ssize_t ade7754_read_frequency(struct device *dev, struct device_attribute *attr, char *buf) { - int ret, len = 0; + int ret; u8 t; int sps; ret = ade7754_spi_read_reg_8(dev, @@ -483,8 +427,7 @@ static ssize_t ade7754_read_frequency(struct device *dev, t = (t >> 3) & 0x3; sps = 26000 / (1 + t); - len = sprintf(buf, "%d SPS\n", sps); - return len; + return sprintf(buf, "%d\n", sps); } static ssize_t ade7754_write_frequency(struct device *dev, @@ -513,18 +456,14 @@ static ssize_t ade7754_write_frequency(struct device *dev, else st->us->max_speed_hz = ADE7754_SPI_FAST; - ret = ade7754_spi_read_reg_8(dev, - ADE7754_WAVMODE, - ®); + ret = ade7754_spi_read_reg_8(dev, ADE7754_WAVMODE, ®); if (ret) goto out; reg &= ~(3 << 3); reg |= t << 3; - ret = ade7754_spi_write_reg_8(dev, - ADE7754_WAVMODE, - reg); + ret = ade7754_spi_write_reg_8(dev, ADE7754_WAVMODE, reg); out: mutex_unlock(&indio_dev->mlock); @@ -545,14 +484,6 @@ static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000"); static IIO_CONST_ATTR(name, "ade7754"); -static struct attribute *ade7754_event_attributes[] = { - NULL -}; - -static struct attribute_group ade7754_event_attribute_group = { - .attrs = ade7754_event_attributes, -}; - static struct attribute *ade7754_attributes[] = { &iio_dev_attr_temp_raw.dev_attr.attr, &iio_const_attr_temp_offset.dev_attr.attr, @@ -633,58 +564,22 @@ static int __devinit ade7754_probe(struct spi_device *spi) } st->indio_dev->dev.parent = &spi->dev; - st->indio_dev->num_interrupt_lines = 1; - st->indio_dev->event_attrs = &ade7754_event_attribute_group; st->indio_dev->attrs = &ade7754_attribute_group; st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; - ret = ade7754_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; + goto error_free_dev; regdone = 1; - ret = ade7754_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, - "ade7754"); - if (ret) - goto error_uninitialize_ring; - - ret = ade7754_probe_trigger(st->indio_dev); - if (ret) - goto error_unregister_line; - } - /* Get the device into a sane initial state */ ret = ade7754_initial_setup(st); if (ret) - goto error_remove_trigger; + goto error_free_dev; return 0; -error_remove_trigger: - if (st->indio_dev->modes & INDIO_RING_TRIGGERED) - ade7754_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: - ade7754_uninitialize_ring(st->indio_dev->ring); -error_unreg_ring_funcs: - ade7754_unconfigure_ring(st->indio_dev); error_free_dev: if (regdone) iio_device_unregister(st->indio_dev); @@ -711,14 +606,6 @@ static int ade7754_remove(struct spi_device *spi) if (ret) goto err_ret; - flush_scheduled_work(); - - ade7754_remove_trigger(indio_dev); - if (spi->irq) - iio_unregister_interrupt_line(indio_dev, 0); - - ade7754_uninitialize_ring(indio_dev->ring); - ade7754_unconfigure_ring(indio_dev); iio_device_unregister(indio_dev); kfree(st->tx); kfree(st->rx); diff --git a/drivers/staging/iio/meter/ade7754.h b/drivers/staging/iio/meter/ade7754.h index f6a3e4b..8faa9b3 100644 --- a/drivers/staging/iio/meter/ade7754.h +++ b/drivers/staging/iio/meter/ade7754.h @@ -78,84 +78,17 @@ /** * struct ade7754_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 ade7754_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 ade7754_scan { - ADE7754_SCAN_PHA_V, - ADE7754_SCAN_PHB_V, - ADE7754_SCAN_PHC_V, - ADE7754_SCAN_PHA_I, - ADE7754_SCAN_PHB_I, - ADE7754_SCAN_PHC_I, -}; - -void ade7754_remove_trigger(struct iio_dev *indio_dev); -int ade7754_probe_trigger(struct iio_dev *indio_dev); - -ssize_t ade7754_read_data_from_ring(struct device *dev, - struct device_attribute *attr, - char *buf); - - -int ade7754_configure_ring(struct iio_dev *indio_dev); -void ade7754_unconfigure_ring(struct iio_dev *indio_dev); - -int ade7754_initialize_ring(struct iio_ring_buffer *ring); -void ade7754_uninitialize_ring(struct iio_ring_buffer *ring); -#else /* CONFIG_IIO_RING_BUFFER */ - -static inline void ade7754_remove_trigger(struct iio_dev *indio_dev) -{ -} -static inline int ade7754_probe_trigger(struct iio_dev *indio_dev) -{ - return 0; -} - -static inline ssize_t -ade7754_read_data_from_ring(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - return 0; -} - -static int ade7754_configure_ring(struct iio_dev *indio_dev) -{ - return 0; -} -static inline void ade7754_unconfigure_ring(struct iio_dev *indio_dev) -{ -} -static inline int ade7754_initialize_ring(struct iio_ring_buffer *ring) -{ - return 0; -} -static inline void ade7754_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