From: Jonathan Cameron Date: Wed, 18 May 2011 13:41:24 +0000 (+0100) Subject: staging:iio:adc:ad7476 use channel_spec X-Git-Tag: firefly_0821_release~7613^2~1326^2~78 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c5e0819e2d82c78c392a91a320e92cd4e19d54b7;p=firefly-linux-kernel-4.4.55.git staging:iio:adc:ad7476 use channel_spec V3: Trivial rebase fixup. V2: Move to new single IIO_CHAN macro. Done without hardware. Fix from Michael Hennerich incorporated to use iio_ring_buffer_register_ex instead of iio_ring_buffer_register and thus actually make it work. Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h index f917e9c3d54f..17febd25aec9 100644 --- a/drivers/staging/iio/adc/ad7476.h +++ b/drivers/staging/iio/adc/ad7476.h @@ -19,11 +19,8 @@ struct ad7476_platform_data { }; struct ad7476_chip_info { - u8 bits; - u8 storagebits; - u8 res_shift; - char sign; u16 int_vref_mv; + struct iio_chan_spec channel[2]; }; struct ad7476_state { diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c index b16744cc5495..0438923f1afe 100644 --- a/drivers/staging/iio/adc/ad7476_core.c +++ b/drivers/staging/iio/adc/ad7476_core.c @@ -35,42 +35,39 @@ static int ad7476_scan_direct(struct ad7476_state *st) return (st->data[0] << 8) | st->data[1]; } -static ssize_t ad7476_scan(struct device *dev, - struct device_attribute *attr, - char *buf) +static int ad7476_read_raw(struct iio_dev *dev_info, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) { - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7476_state *st = dev_info->dev_data; int ret; - - mutex_lock(&dev_info->mlock); - if (iio_ring_enabled(dev_info)) - ret = ad7476_scan_from_ring(st); - else - ret = ad7476_scan_direct(st); - mutex_unlock(&dev_info->mlock); - - if (ret < 0) - return ret; - - return sprintf(buf, "%d\n", (ret >> st->chip_info->res_shift) & - RES_MASK(st->chip_info->bits)); -} -static IIO_DEV_ATTR_IN_RAW(0, ad7476_scan, 0); - -static ssize_t ad7476_show_scale(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - /* Driver currently only support internal vref */ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7476_state *st = iio_dev_get_devdata(dev_info); - /* Corresponds to Vref / 2^(bits) */ - unsigned int scale_uv = (st->int_vref_mv * 1000) >> st->chip_info->bits; - - return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000); + struct ad7476_state *st = dev_info->dev_data; + unsigned int scale_uv; + + switch (m) { + case 0: + mutex_lock(&dev_info->mlock); + if (iio_ring_enabled(dev_info)) + ret = ad7476_scan_from_ring(st); + else + ret = ad7476_scan_direct(st); + mutex_unlock(&dev_info->mlock); + + if (ret < 0) + return ret; + *val = (ret >> st->chip_info->channel[0].scan_type.shift) & + RES_MASK(st->chip_info->channel[0].scan_type.realbits); + return IIO_VAL_INT; + case (1 << IIO_CHAN_INFO_SCALE_SHARED): + scale_uv = (st->int_vref_mv * 1000) + >> st->chip_info->channel[0].scan_type.realbits; + *val = scale_uv/1000; + *val2 = (scale_uv%1000)*1000; + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; } -static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7476_show_scale, NULL, 0); static ssize_t ad7476_show_name(struct device *dev, struct device_attribute *attr, @@ -84,8 +81,6 @@ static ssize_t ad7476_show_name(struct device *dev, static IIO_DEVICE_ATTR(name, S_IRUGO, ad7476_show_name, NULL, 0); static struct attribute *ad7476_attributes[] = { - &iio_dev_attr_in0_raw.dev_attr.attr, - &iio_dev_attr_in_scale.dev_attr.attr, &iio_dev_attr_name.dev_attr.attr, NULL, }; @@ -96,53 +91,53 @@ static const struct attribute_group ad7476_attribute_group = { static const struct ad7476_chip_info ad7476_chip_info_tbl[] = { [ID_AD7466] = { - .bits = 12, - .storagebits = 16, - .res_shift = 0, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 12, 16, 0), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7467] = { - .bits = 10, - .storagebits = 16, - .res_shift = 2, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 10, 16, 2), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7468] = { - .bits = 8, - .storagebits = 16, - .res_shift = 4, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1 , 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 8, 16, 4), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7475] = { - .bits = 12, - .storagebits = 16, - .res_shift = 0, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 12, 16, 0), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7476] = { - .bits = 12, - .storagebits = 16, - .res_shift = 0, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 12, 16, 0), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7477] = { - .bits = 10, - .storagebits = 16, - .res_shift = 2, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 10, 16, 2), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7478] = { - .bits = 8, - .storagebits = 16, - .res_shift = 4, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 8, 16, 4), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), }, [ID_AD7495] = { - .bits = 12, - .storagebits = 16, - .res_shift = 0, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 0, 0, IIO_ST('u', 12, 16, 0), 0), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), .int_vref_mv = 2500, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, }, }; @@ -196,11 +191,13 @@ static int __devinit ad7476_probe(struct spi_device *spi) st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; - + st->indio_dev->channels = st->chip_info->channel; + st->indio_dev->num_channels = 2; + st->indio_dev->read_raw = &ad7476_read_raw; /* Setup default message */ st->xfer.rx_buf = &st->data; - st->xfer.len = st->chip_info->storagebits / 8; + st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8; spi_message_init(&st->msg); spi_message_add_tail(&st->xfer, &st->msg); @@ -213,7 +210,9 @@ static int __devinit ad7476_probe(struct spi_device *spi) if (ret) goto error_free_device; - ret = iio_ring_buffer_register(st->indio_dev->ring, 0); + ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0, + st->chip_info->channel, + ARRAY_SIZE(st->chip_info->channel)); if (ret) goto error_cleanup_ring; return 0; diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c index 92d93787d5b8..8f00d6c23c87 100644 --- a/drivers/staging/iio/adc/ad7476_ring.c +++ b/drivers/staging/iio/adc/ad7476_ring.c @@ -25,39 +25,6 @@ #include "ad7476.h" -static IIO_SCAN_EL_C(in0, 0, 0, NULL); -static IIO_SCAN_EL_TIMESTAMP(1); -static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64); - -static ssize_t ad7476_show_type(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_ring_buffer *ring = dev_get_drvdata(dev); - struct iio_dev *indio_dev = ring->indio_dev; - struct ad7476_state *st = indio_dev->dev_data; - - return sprintf(buf, "%c%d/%d>>%d\n", st->chip_info->sign, - st->chip_info->bits, st->chip_info->storagebits, - st->chip_info->res_shift); -} -static IIO_DEVICE_ATTR(in_type, S_IRUGO, ad7476_show_type, NULL, 0); - -static struct attribute *ad7476_scan_el_attrs[] = { - &iio_scan_el_in0.dev_attr.attr, - &iio_const_attr_in0_index.dev_attr.attr, - &iio_const_attr_timestamp_index.dev_attr.attr, - &iio_scan_el_timestamp.dev_attr.attr, - &iio_const_attr_timestamp_type.dev_attr.attr, - &iio_dev_attr_in_type.dev_attr.attr, - NULL, -}; - -static struct attribute_group ad7476_scan_el_group = { - .name = "scan_elements", - .attrs = ad7476_scan_el_attrs, -}; - int ad7476_scan_from_ring(struct ad7476_state *st) { struct iio_ring_buffer *ring = st->indio_dev->ring; @@ -93,7 +60,8 @@ static int ad7476_ring_preenable(struct iio_dev *indio_dev) struct ad7476_state *st = indio_dev->dev_data; struct iio_ring_buffer *ring = indio_dev->ring; - st->d_size = ring->scan_count * st->chip_info->storagebits / 8; + st->d_size = ring->scan_count * + st->chip_info->channel[0].scan_type.storagebits / 8; if (ring->scan_timestamp) { st->d_size += sizeof(s64); @@ -150,7 +118,8 @@ static void ad7476_poll_bh_to_ring(struct work_struct *work_s) if (rxbuf == NULL) return; - b_sent = spi_read(st->spi, rxbuf, st->chip_info->storagebits / 8); + b_sent = spi_read(st->spi, rxbuf, + st->chip_info->channel[0].scan_type.storagebits / 8); if (b_sent < 0) goto done; @@ -187,7 +156,6 @@ int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev) indio_dev->ring->preenable = &ad7476_ring_preenable; indio_dev->ring->postenable = &iio_triggered_ring_postenable; indio_dev->ring->predisable = &iio_triggered_ring_predisable; - indio_dev->ring->scan_el_attrs = &ad7476_scan_el_group; indio_dev->ring->scan_timestamp = true; INIT_WORK(&st->poll_work, &ad7476_poll_bh_to_ring);