From 26628f6b53d1ae3610146607c0c7fcbaf403bee7 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 4 Jun 2012 11:36:12 +0200 Subject: [PATCH] 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 Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/dac/ad5064.c | 65 +++++++++++--------------------- 1 file changed, 21 insertions(+), 44 deletions(-) diff --git a/drivers/staging/iio/dac/ad5064.c b/drivers/staging/iio/dac/ad5064.c index 047148aa66b2..2394f05182ca 100644 --- a/drivers/staging/iio/dac/ad5064.c +++ b/drivers/staging/iio/dac/ad5064.c @@ -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), { }, }; -- 2.39.5