From: Lars-Peter Clausen Date: Wed, 25 Apr 2012 07:44:58 +0000 (+0200) Subject: staging:iio:dac:ad5446: Convert to extended channel attributes X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=83f0f5723eb86ed0fcdeafde4a495303a1e19004;p=~shefty%2Frdma-dev.git 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: Lars-Peter Clausen Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c index 00eece44b8b..20c414c8dd6 100644 --- a/drivers/staging/iio/dac/ad5446.c +++ b/drivers/staging/iio/dac/ad5446.c @@ -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, - const char *buf, size_t len) +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->info = &ad5446_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = &st->chip_info->channel; indio_dev->num_channels = 1;