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staging:iio:dac:ad5064: 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 11:36:12 +02:00 committed by Greg Kroah-Hartman
parent 5212cc8a9d
commit 26628f6b53
1 changed files with 21 additions and 44 deletions
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65
drivers/staging/iio/dac/ad5064.c
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@ -136,57 +136,42 @@ static int ad5064_sync_powerdown_mode(struct ad5064_state *st,
return ret;
}
static const char ad5064_powerdown_modes[][15] = {
[AD5064_LDAC_PWRDN_NONE] = "",
[AD5064_LDAC_PWRDN_1K] = "1kohm_to_gnd",
[AD5064_LDAC_PWRDN_100K] = "100kohm_to_gnd",
[AD5064_LDAC_PWRDN_3STATE] = "three_state",
static const char * const ad5064_powerdown_modes[] = {
"1kohm_to_gnd",
"100kohm_to_gnd",
"three_state",
};
static ssize_t ad5064_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", ad5064_powerdown_modes[1],
ad5064_powerdown_modes[2], ad5064_powerdown_modes[3]);
}
static ssize_t ad5064_read_powerdown_mode(struct iio_dev *indio_dev,
uintptr_t private, const struct iio_chan_spec *chan, char *buf)
static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct ad5064_state *st = iio_priv(indio_dev);
return sprintf(buf, "%s\n",
ad5064_powerdown_modes[st->pwr_down_mode[chan->channel]]);
return st->pwr_down_mode[chan->channel] - 1;
}
static ssize_t ad5064_write_powerdown_mode(struct iio_dev *indio_dev,
uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
size_t len)
static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan, unsigned int mode)
{
struct ad5064_state *st = iio_priv(indio_dev);
unsigned int mode, i;
int ret;
mode = 0;
for (i = 1; i < ARRAY_SIZE(ad5064_powerdown_modes); ++i) {
if (sysfs_streq(buf, ad5064_powerdown_modes[i])) {
mode = i;
break;
}
}
if (mode == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);
st->pwr_down_mode[chan->channel] = mode;
st->pwr_down_mode[chan->channel] = mode + 1;
ret = ad5064_sync_powerdown_mode(st, chan->channel);
mutex_unlock(&indio_dev->mlock);
return ret ? ret : len;
return ret;
}
static const struct iio_enum ad5064_powerdown_mode_enum = {
.items = ad5064_powerdown_modes,
.num_items = ARRAY_SIZE(ad5064_powerdown_modes),
.get = ad5064_get_powerdown_mode,
.set = ad5064_set_powerdown_mode,
};
static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev,
uintptr_t private, const struct iio_chan_spec *chan, char *buf)
{
@ -286,22 +271,14 @@ static const struct iio_info ad5064_info = {
.driver_module = THIS_MODULE,
};
static struct iio_chan_spec_ext_info ad5064_ext_info[] = {
static const struct iio_chan_spec_ext_info ad5064_ext_info[] = {
{
.name = "powerdown",
.read = ad5064_read_dac_powerdown,
.write = ad5064_write_dac_powerdown,
},
{
.name = "powerdown_mode",
.read = ad5064_read_powerdown_mode,
.write = ad5064_write_powerdown_mode,
},
{
.name = "powerdown_mode_available",
.shared = true,
.read = ad5064_read_powerdown_mode_available,
},
IIO_ENUM("powerdown_mode", false, &ad5064_powerdown_mode_enum),
IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum),
{ },
};