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Commit 83f0f572 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Greg Kroah-Hartman
Browse files

staging:iio:dac:ad5446: Convert to extended channel attributes 



Use extended channel attributes instead of raw sysfs files for the additional
channel attributes.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Acked-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 11a7df48

drivers/staging/iio/dac/ad5446.c

+68 −71
Original line number Diff line number Diff line
@@ -60,64 +60,69 @@ static int ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode) 
	return spi_write(st->spi, data, sizeof(data));

}



static ssize_t ad5446_write_powerdown_mode(struct device *dev,

				       struct device_attribute *attr,

static const char * const ad5446_powerdown_modes[] = {

	"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"

};



static ssize_t ad5446_read_powerdown_mode_available(struct iio_dev *indio_dev,

	const struct iio_chan_spec *chan, char *buf)

{

	return sprintf(buf, "%s %s %s\n", ad5446_powerdown_modes[1],

		ad5446_powerdown_modes[2], ad5446_powerdown_modes[3]);

}



static ssize_t ad5446_write_powerdown_mode(struct iio_dev *indio_dev,

					    const struct iio_chan_spec *chan,

					    const char *buf, size_t len)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ad5446_state *st = iio_priv(indio_dev);

	int i;



	if (sysfs_streq(buf, "1kohm_to_gnd"))

		st->pwr_down_mode = MODE_PWRDWN_1k;

	else if (sysfs_streq(buf, "100kohm_to_gnd"))

		st->pwr_down_mode = MODE_PWRDWN_100k;

	else if (sysfs_streq(buf, "three_state"))

		st->pwr_down_mode = MODE_PWRDWN_TRISTATE;

	else

	for (i = 1; i < ARRAY_SIZE(ad5446_powerdown_modes); i++) {

		if (sysfs_streq(buf, ad5446_powerdown_modes[i])) {

			st->pwr_down_mode = i;

			break;

		}

	}



	if (i == ARRAY_SIZE(ad5446_powerdown_modes))

		return -EINVAL;



	return len;

}



static ssize_t ad5446_read_powerdown_mode(struct device *dev,

				      struct device_attribute *attr, char *buf)

static ssize_t ad5446_read_powerdown_mode(struct iio_dev *indio_dev,

					   const struct iio_chan_spec *chan,

					   char *buf)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ad5446_state *st = iio_priv(indio_dev);



	char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"};



	return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);

	return sprintf(buf, "%s\n", ad5446_powerdown_modes[st->pwr_down_mode]);

}



static ssize_t ad5446_read_dac_powerdown(struct device *dev,

					   struct device_attribute *attr,

static ssize_t ad5446_read_dac_powerdown(struct iio_dev *indio_dev,

					   const struct iio_chan_spec *chan,

					   char *buf)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ad5446_state *st = iio_priv(indio_dev);



	return sprintf(buf, "%d\n", st->pwr_down);

}



static ssize_t ad5446_write_dac_powerdown(struct device *dev,

					    struct device_attribute *attr,

static ssize_t ad5446_write_dac_powerdown(struct iio_dev *indio_dev,

					    const struct iio_chan_spec *chan,

					    const char *buf, size_t len)

{

	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	struct ad5446_state *st = iio_priv(indio_dev);

	unsigned long readin;

	bool powerdown;

	int ret;



	ret = strict_strtol(buf, 10, &readin);

	ret = strtobool(buf, &powerdown);

	if (ret)

		return ret;



	if (readin > 1)

		ret = -EINVAL;



	mutex_lock(&indio_dev->mlock);

	st->pwr_down = readin;

	st->pwr_down = powerdown;



	if (st->pwr_down)

		ret = st->chip_info->store_pwr_down(st, st->pwr_down_mode);
@@ -129,38 +134,40 @@ static ssize_t ad5446_write_dac_powerdown(struct device *dev, 
	return ret ? ret : len;

}



static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO | S_IWUSR,

			ad5446_read_powerdown_mode,

			ad5446_write_powerdown_mode, 0);



static IIO_CONST_ATTR(out_voltage_powerdown_mode_available,

			"1kohm_to_gnd 100kohm_to_gnd three_state");



static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO | S_IWUSR,

			ad5446_read_dac_powerdown,

			ad5446_write_dac_powerdown, 0);



static struct attribute *ad5446_attributes[] = {

	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,

	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,

	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,

	NULL,

};



static const struct attribute_group ad5446_attribute_group = {

	.attrs = ad5446_attributes,

static const struct iio_chan_spec_ext_info ad5064_ext_info_powerdown[] = {

	{

		.name = "powerdown",

		.read = ad5446_read_dac_powerdown,

		.write = ad5446_write_dac_powerdown,

	}, {

		.name = "powerdown_mode",

		.read = ad5446_read_powerdown_mode,

		.write = ad5446_write_powerdown_mode,

	}, {

		.name = "powerdown_mode_available",

		.shared = true,

		.read = ad5446_read_powerdown_mode_available,

	},

	{ },

};



#define AD5446_CHANNEL(bits, storage, shift) { \

#define _AD5446_CHANNEL(bits, storage, shift, ext) { \

	.type = IIO_VOLTAGE, \

	.indexed = 1, \

	.output = 1, \

	.channel = 0, \

	.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \

	IIO_CHAN_INFO_SCALE_SHARED_BIT,	\

	.scan_type = IIO_ST('u', (bits), (storage), (shift)) \

	.scan_type = IIO_ST('u', (bits), (storage), (shift)), \

	.ext_info = (ext), \

}



#define AD5446_CHANNEL(bits, storage, shift) \

	_AD5446_CHANNEL(bits, storage, shift, NULL)



#define AD5446_CHANNEL_POWERDOWN(bits, storage, shift) \

	_AD5446_CHANNEL(bits, storage, shift, ad5064_ext_info_powerdown)



static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {

	[ID_AD5444] = {

		.channel = AD5446_CHANNEL(12, 16, 2),
@@ -183,52 +190,52 @@ static const struct ad5446_chip_info ad5446_chip_info_tbl[] = { 
		.store_sample = ad5446_store_sample,

	},

	[ID_AD5601] = {

		.channel = AD5446_CHANNEL(8, 16, 6),

		.channel = AD5446_CHANNEL_POWERDOWN(8, 16, 6),

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5611] = {

		.channel = AD5446_CHANNEL(10, 16, 4),

		.channel = AD5446_CHANNEL_POWERDOWN(10, 16, 4),

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5621] = {

		.channel = AD5446_CHANNEL(12, 16, 2),

		.channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2),

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5620_2500] = {

		.channel = AD5446_CHANNEL(12, 16, 2),

		.channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2),

		.int_vref_mv = 2500,

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5620_1250] = {

		.channel = AD5446_CHANNEL(12, 16, 2),

		.channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2),

		.int_vref_mv = 1250,

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5640_2500] = {

		.channel = AD5446_CHANNEL(14, 16, 0),

		.channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0),

		.int_vref_mv = 2500,

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5640_1250] = {

		.channel = AD5446_CHANNEL(14, 16, 0),

		.channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0),

		.int_vref_mv = 1250,

		.store_sample = ad5446_store_sample,

		.store_pwr_down = ad5620_store_pwr_down,

	},

	[ID_AD5660_2500] = {

		.channel = AD5446_CHANNEL(16, 16, 0),

		.channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0),

		.int_vref_mv = 2500,

		.store_sample = ad5660_store_sample,

		.store_pwr_down = ad5660_store_pwr_down,

	},

	[ID_AD5660_1250] = {

		.channel = AD5446_CHANNEL(16, 16, 0),

		.channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0),

		.int_vref_mv = 1250,

		.store_sample = ad5660_store_sample,

		.store_pwr_down = ad5660_store_pwr_down,
@@ -284,13 +291,6 @@ static int ad5446_write_raw(struct iio_dev *indio_dev, 
}



static const struct iio_info ad5446_info = {

	.read_raw = ad5446_read_raw,

	.write_raw = ad5446_write_raw,

	.attrs = &ad5446_attribute_group,

	.driver_module = THIS_MODULE,

};



static const struct iio_info ad5446_info_no_pwr_down = {

	.read_raw = ad5446_read_raw,

	.write_raw = ad5446_write_raw,

	.driver_module = THIS_MODULE,
@@ -328,10 +328,7 @@ static int __devinit ad5446_probe(struct spi_device *spi) 
	/* Establish that the iio_dev is a child of the spi device */

	indio_dev->dev.parent = &spi->dev;

	indio_dev->name = spi_get_device_id(spi)->name;

	if (st->chip_info->store_pwr_down)

	indio_dev->info = &ad5446_info;

	else

		indio_dev->info = &ad5446_info_no_pwr_down;

	indio_dev->modes = INDIO_DIRECT_MODE;

	indio_dev->channels = &st->chip_info->channel;

	indio_dev->num_channels = 1;