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staging:iio:dac:ad5446: Use iio_enum for powerdown modes 

This allows us to remove some boilerplate code for comparing and formatting the
enum strings.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lars-Peter Clausen 2012-06-04 11:36:13 +02:00 committed by Greg Kroah-Hartman
parent 26628f6b53
commit 09d48aa9f6
1 changed files with 25 additions and 42 deletions
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67
drivers/staging/iio/dac/ad5446.c
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@ -42,47 +42,34 @@ static int ad5660_write(struct ad5446_state *st, unsigned val)
}
static const char * const ad5446_powerdown_modes[] = {
"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"
"1kohm_to_gnd", "100kohm_to_gnd", "three_state"
};
static ssize_t ad5446_read_powerdown_mode_available(struct iio_dev *indio_dev,
uintptr_t private, 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,
uintptr_t private,
const struct iio_chan_spec *chan,
const char *buf, size_t len)
{
struct ad5446_state *st = iio_priv(indio_dev);
int i;
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 iio_dev *indio_dev,
uintptr_t private,
const struct iio_chan_spec *chan,
char *buf)
static int ad5446_set_powerdown_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan, unsigned int mode)
{
struct ad5446_state *st = iio_priv(indio_dev);
return sprintf(buf, "%s\n", ad5446_powerdown_modes[st->pwr_down_mode]);
st->pwr_down_mode = mode + 1;
return 0;
}
static int ad5446_get_powerdown_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct ad5446_state *st = iio_priv(indio_dev);
return st->pwr_down_mode - 1;
}
static const struct iio_enum ad5446_powerdown_mode_enum = {
.items = ad5446_powerdown_modes,
.num_items = ARRAY_SIZE(ad5446_powerdown_modes),
.get = ad5446_get_powerdown_mode,
.set = ad5446_set_powerdown_mode,
};
static ssize_t ad5446_read_dac_powerdown(struct iio_dev *indio_dev,
uintptr_t private,
const struct iio_chan_spec *chan,
@ -129,15 +116,9 @@ 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,
},
IIO_ENUM("powerdown_mode", false, &ad5446_powerdown_mode_enum),
IIO_ENUM_AVAILABLE("powerdown_mode", &ad5446_powerdown_mode_enum),
{ },
};
@ -321,6 +302,8 @@ static int __devinit ad5446_probe(struct spi_device *spi)
indio_dev->channels = &st->chip_info->channel;
indio_dev->num_channels = 1;
st->pwr_down_mode = MODE_PWRDWN_1k;
if (st->chip_info->int_vref_mv)
st->vref_mv = st->chip_info->int_vref_mv;
else if (voltage_uv)