From 596d06097f7843e4fd913f4e4e031a18641c2734 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Wed, 18 May 2011 14:41:50 +0100 Subject: [PATCH] staging:iio:adc:ad7887: Convert to new channel registration method. Convert to new channel registration method Update / change license copyright header Add missing call to iio_trigger_notify_done() V2: use IIO_CHAN macro. Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/adc/ad7887.h | 14 +-- drivers/staging/iio/adc/ad7887_core.c | 123 +++++++++++--------------- drivers/staging/iio/adc/ad7887_ring.c | 68 ++------------ 3 files changed, 67 insertions(+), 138 deletions(-) diff --git a/drivers/staging/iio/adc/ad7887.h b/drivers/staging/iio/adc/ad7887.h index ffff403d29a4..a0c3742a66ed 100644 --- a/drivers/staging/iio/adc/ad7887.h +++ b/drivers/staging/iio/adc/ad7887.h @@ -48,12 +48,15 @@ struct ad7887_platform_data { bool use_onchip_ref; }; +/** + * struct ad7887_chip_info - chip specifc information + * @int_vref_mv: the internal reference voltage + * @channel: channel specification + */ + struct ad7887_chip_info { - u8 bits; /* number of ADC bits */ - u8 storagebits; /* number of bits read from the ADC */ - u8 left_shift; /* number of bits the sample must be shifted */ - char sign; /* [s]igned or [u]nsigned */ - u16 int_vref_mv; /* internal reference voltage */ + u16 int_vref_mv; + struct iio_chan_spec channel[3]; }; struct ad7887_state { @@ -63,7 +66,6 @@ struct ad7887_state { struct regulator *reg; size_t d_size; u16 int_vref_mv; - bool en_dual; struct spi_transfer xfer[4]; struct spi_message msg[3]; struct spi_message *ring_msg; diff --git a/drivers/staging/iio/adc/ad7887_core.c b/drivers/staging/iio/adc/ad7887_core.c index 27adff428c2f..f394215c7f47 100644 --- a/drivers/staging/iio/adc/ad7887_core.c +++ b/drivers/staging/iio/adc/ad7887_core.c @@ -1,9 +1,9 @@ /* * AD7887 SPI ADC driver * - * Copyright 2010 Analog Devices Inc. + * Copyright 2010-2011 Analog Devices Inc. * - * Licensed under the GPL-2 or later. + * Licensed under the GPL-2. */ #include @@ -33,81 +33,55 @@ static int ad7887_scan_direct(struct ad7887_state *st, unsigned ch) return (st->data[(ch * 2)] << 8) | st->data[(ch * 2) + 1]; } -static ssize_t ad7887_scan(struct device *dev, - struct device_attribute *attr, - char *buf) +static int ad7887_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 ad7887_state *st = dev_info->dev_data; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int ret; + struct ad7887_state *st = dev_info->dev_data; + unsigned int scale_uv; - mutex_lock(&dev_info->mlock); - if (iio_ring_enabled(dev_info)) - ret = ad7887_scan_from_ring(st, 1 << this_attr->address); - else - ret = ad7887_scan_direct(st, this_attr->address); - mutex_unlock(&dev_info->mlock); - - if (ret < 0) - return ret; - - return sprintf(buf, "%d\n", (ret >> st->chip_info->left_shift) & - RES_MASK(st->chip_info->bits)); -} -static IIO_DEV_ATTR_IN_RAW(0, ad7887_scan, 0); -static IIO_DEV_ATTR_IN_RAW(1, ad7887_scan, 1); - -static ssize_t ad7887_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 ad7887_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); -} -static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7887_show_scale, NULL, 0); - -static struct attribute *ad7887_attributes[] = { - &iio_dev_attr_in0_raw.dev_attr.attr, - &iio_dev_attr_in1_raw.dev_attr.attr, - &iio_dev_attr_in_scale.dev_attr.attr, - NULL, -}; - -static mode_t ad7887_attr_is_visible(struct kobject *kobj, - struct attribute *attr, int n) -{ - struct device *dev = container_of(kobj, struct device, kobj); - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7887_state *st = iio_dev_get_devdata(dev_info); - - mode_t mode = attr->mode; - - if ((attr == &iio_dev_attr_in1_raw.dev_attr.attr) && !st->en_dual) - mode = 0; - - return mode; + switch (m) { + case 0: + mutex_lock(&dev_info->mlock); + if (iio_ring_enabled(dev_info)) + ret = ad7887_scan_from_ring(st, 1 << chan->address); + else + ret = ad7887_scan_direct(st, chan->address); + 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 const struct attribute_group ad7887_attribute_group = { - .attrs = ad7887_attributes, - .is_visible = ad7887_attr_is_visible, -}; static const struct ad7887_chip_info ad7887_chip_info_tbl[] = { /* * More devices added in future */ [ID_AD7887] = { - .bits = 12, - .storagebits = 16, - .left_shift = 0, - .sign = IIO_SCAN_EL_TYPE_UNSIGNED, + .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + 1, 1, IIO_ST('u', 12, 16, 0), 0), + + .channel[1] = 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[2] = IIO_CHAN_SOFT_TIMESTAMP(2), .int_vref_mv = 2500, }, }; @@ -149,8 +123,11 @@ static int __devinit ad7887_probe(struct spi_device *spi) /* Estabilish that the iio_dev is a child of the spi device */ st->indio_dev->dev.parent = &spi->dev; st->indio_dev->name = spi_get_device_id(spi)->name; - st->indio_dev->attrs = &ad7887_attribute_group; st->indio_dev->dev_data = (void *)(st); + st->indio_dev->channels = st->chip_info->channel; + st->indio_dev->num_channels = 3; + st->indio_dev->read_raw = &ad7887_read_raw; + st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; @@ -196,8 +173,6 @@ static int __devinit ad7887_probe(struct spi_device *spi) spi_message_init(&st->msg[AD7887_CH1]); spi_message_add_tail(&st->xfer[3], &st->msg[AD7887_CH1]); - st->en_dual = true; - if (pdata && pdata->vref_mv) st->int_vref_mv = pdata->vref_mv; else if (voltage_uv) @@ -205,6 +180,8 @@ static int __devinit ad7887_probe(struct spi_device *spi) else dev_warn(&spi->dev, "reference voltage unspecified\n"); + st->indio_dev->channels = st->chip_info->channel; + st->indio_dev->num_channels = 3; } else { if (pdata && pdata->vref_mv) st->int_vref_mv = pdata->vref_mv; @@ -212,8 +189,10 @@ static int __devinit ad7887_probe(struct spi_device *spi) st->int_vref_mv = st->chip_info->int_vref_mv; else dev_warn(&spi->dev, "reference voltage unspecified\n"); - } + st->indio_dev->channels = &st->chip_info->channel[1]; + st->indio_dev->num_channels = 2; + } ret = ad7887_register_ring_funcs_and_init(st->indio_dev); if (ret) @@ -223,7 +202,9 @@ static int __devinit ad7887_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->indio_dev->channels, + st->indio_dev->num_channels); if (ret) goto error_cleanup_ring; return 0; diff --git a/drivers/staging/iio/adc/ad7887_ring.c b/drivers/staging/iio/adc/ad7887_ring.c index df5a2ae84379..fa9ea731143b 100644 --- a/drivers/staging/iio/adc/ad7887_ring.c +++ b/drivers/staging/iio/adc/ad7887_ring.c @@ -1,8 +1,8 @@ /* - * Copyright 2010 Analog Devices Inc. + * Copyright 2010-2011 Analog Devices Inc. * Copyright (C) 2008 Jonathan Cameron * - * Licensed under the GPL-2 or later. + * Licensed under the GPL-2. * * ad7887_ring.c */ @@ -25,61 +25,6 @@ #include "ad7887.h" -static IIO_SCAN_EL_C(in0, 0, 0, NULL); -static IIO_SCAN_EL_C(in1, 1, 0, NULL); -static IIO_SCAN_EL_TIMESTAMP(2); -static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64); - -static ssize_t ad7887_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 ad7887_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->left_shift); -} -static IIO_DEVICE_ATTR(in_type, S_IRUGO, ad7887_show_type, NULL, 0); - -static struct attribute *ad7887_scan_el_attrs[] = { - &iio_scan_el_in0.dev_attr.attr, - &iio_const_attr_in0_index.dev_attr.attr, - &iio_scan_el_in1.dev_attr.attr, - &iio_const_attr_in1_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 mode_t ad7887_scan_el_attr_is_visible(struct kobject *kobj, - struct attribute *attr, int n) -{ - struct device *dev = container_of(kobj, struct device, kobj); - struct iio_ring_buffer *ring = dev_get_drvdata(dev); - struct iio_dev *indio_dev = ring->indio_dev; - struct ad7887_state *st = indio_dev->dev_data; - - mode_t mode = attr->mode; - - if ((attr == &iio_scan_el_in1.dev_attr.attr) || - (attr == &iio_const_attr_in1_index.dev_attr.attr)) - if (!st->en_dual) - mode = 0; - - return mode; -} - -static struct attribute_group ad7887_scan_el_group = { - .name = "scan_elements", - .attrs = ad7887_scan_el_attrs, - .is_visible = ad7887_scan_el_attr_is_visible, -}; - int ad7887_scan_from_ring(struct ad7887_state *st, long mask) { struct iio_ring_buffer *ring = st->indio_dev->ring; @@ -124,7 +69,8 @@ static int ad7887_ring_preenable(struct iio_dev *indio_dev) struct ad7887_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); @@ -179,7 +125,8 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p) __u8 *buf; int b_sent; - unsigned int bytes = ring->scan_count * st->chip_info->storagebits / 8; + unsigned int bytes = ring->scan_count * + st->chip_info->channel[0].scan_type.storagebits / 8; buf = kzalloc(st->d_size, GFP_KERNEL); if (buf == NULL) @@ -199,6 +146,7 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p) indio_dev->ring->access.store_to(&sw_ring->buf, buf, time_ns); done: kfree(buf); + iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } @@ -236,8 +184,6 @@ int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev) indio_dev->ring->postenable = &iio_triggered_ring_postenable; indio_dev->ring->predisable = &iio_triggered_ring_predisable; indio_dev->ring->postdisable = &ad7887_ring_postdisable; - indio_dev->ring->scan_el_attrs = &ad7887_scan_el_group; - indio_dev->ring->scan_timestamp = true; /* Flag that polled ring buffering is possible */ indio_dev->modes |= INDIO_RING_TRIGGERED; -- 2.30.2