staging:iio:meter remove stubs from ade7759.

General cleanup and use of standard functions to simplfy some spi reads
as well.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c
index fafc3c1e5aaad1043451f2fd57be256deb1e4e64..a9d3203b2e1c3d4a320433ad1ffb18dc40f219a3 100644 (file)
--- 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,
-                       &reg);
+       ret = ade7759_spi_read_reg_16(dev, ADE7759_MODE, &reg);
        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 813dea2676a9b7c817cab0647cf701671d5c2ad8..e9d1c43336feafa94a8e9dd02f35be851ce09581 100644 (file)
--- 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