On 05/11/2012 04:53 PM, Lars-Peter Clausen wrote: > Use extended channel attributes instead of raw sysfs files for the additional > channel attributes. This allows us to remove some boilerplate code. > Another nitpick inline. > Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx> Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx> > --- > drivers/staging/iio/dac/ad5624r_spi.c | 209 ++++++++++++++------------------- > 1 file changed, 91 insertions(+), 118 deletions(-) > > diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c > index 646b448..ef6a320 100644 > --- a/drivers/staging/iio/dac/ad5624r_spi.c > +++ b/drivers/staging/iio/dac/ad5624r_spi.c > @@ -21,56 +21,6 @@ > > #include "ad5624r.h" > > -#define AD5624R_CHANNEL(_chan, _bits) { \ > - .type = IIO_VOLTAGE, \ > - .indexed = 1, \ > - .output = 1, \ > - .channel = (_chan), \ > - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ > - IIO_CHAN_INFO_SCALE_SHARED_BIT, \ > - .address = (_chan), \ > - .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \ > -} > - > -#define DECLARE_AD5624R_CHANNELS(_name, _bits) \ > - const struct iio_chan_spec _name##_channels[] = { \ > - AD5624R_CHANNEL(0, _bits), \ > - AD5624R_CHANNEL(1, _bits), \ > - AD5624R_CHANNEL(2, _bits), \ > - AD5624R_CHANNEL(3, _bits), \ > -} > - > -static DECLARE_AD5624R_CHANNELS(ad5624r, 12); > -static DECLARE_AD5624R_CHANNELS(ad5644r, 14); > -static DECLARE_AD5624R_CHANNELS(ad5664r, 16); > - > -static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = { > - [ID_AD5624R3] = { > - .channels = ad5624r_channels, > - .int_vref_mv = 1250, > - }, > - [ID_AD5624R5] = { > - .channels = ad5624r_channels, > - .int_vref_mv = 2500, > - }, > - [ID_AD5644R3] = { > - .channels = ad5644r_channels, > - .int_vref_mv = 1250, > - }, > - [ID_AD5644R5] = { > - .channels = ad5644r_channels, > - .int_vref_mv = 2500, > - }, > - [ID_AD5664R3] = { > - .channels = ad5664r_channels, > - .int_vref_mv = 1250, > - }, > - [ID_AD5664R5] = { > - .channels = ad5664r_channels, > - .int_vref_mv = 2500, > - }, > -}; > - > static int ad5624r_spi_write(struct spi_device *spi, > u8 cmd, u8 addr, u16 val, u8 len) > { > @@ -138,67 +88,62 @@ static int ad5624r_write_raw(struct iio_dev *indio_dev, > return -EINVAL; > } > > -static ssize_t ad5624r_read_powerdown_mode(struct device *dev, > - struct device_attribute *attr, char *buf) > +static const char * const ad5624r_powerdown_modes[] = { > + "1kohm_to_gnd", > + "100kohm_to_gnd", > + "three_state" > +}; > + > +static int ad5624r_get_powerdown_mode(struct iio_dev *indio_dev, > + const struct iio_chan_spec *chan) > { > - struct iio_dev *indio_dev = dev_get_drvdata(dev); > struct ad5624r_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 st->pwr_down_mode; > } > > -static ssize_t ad5624r_write_powerdown_mode(struct device *dev, > - struct device_attribute *attr, > - const char *buf, size_t len) > +static int ad5624r_set_powerdown_mode(struct iio_dev *indio_dev, > + const struct iio_chan_spec *chan, unsigned int mode) > { > - struct iio_dev *indio_dev = dev_get_drvdata(dev); > struct ad5624r_state *st = iio_priv(indio_dev); > - int ret; > > - if (sysfs_streq(buf, "1kohm_to_gnd")) > - st->pwr_down_mode = AD5624R_LDAC_PWRDN_1K; > - else if (sysfs_streq(buf, "100kohm_to_gnd")) > - st->pwr_down_mode = AD5624R_LDAC_PWRDN_100K; > - else if (sysfs_streq(buf, "three_state")) > - st->pwr_down_mode = AD5624R_LDAC_PWRDN_3STATE; > - else > - ret = -EINVAL; > + st->pwr_down_mode = mode; > > - return ret ? ret : len; > + return 0; > } > > -static ssize_t ad5624r_read_dac_powerdown(struct device *dev, > - struct device_attribute *attr, > - char *buf) > +static const struct iio_enum ad5624r_powerdown_mode_enum = { > + .items = ad5624r_powerdown_modes, > + .num_items = ARRAY_SIZE(ad5624r_powerdown_modes), > + .get = ad5624r_get_powerdown_mode, > + .set = ad5624r_set_powerdown_mode, > +}; > + > +static ssize_t ad5624r_read_dac_powerdown(struct iio_dev *indio_dev, > + uintptr_t private, const struct iio_chan_spec *chan, char *buf) > { > - struct iio_dev *indio_dev = dev_get_drvdata(dev); > struct ad5624r_state *st = iio_priv(indio_dev); > - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); > > return sprintf(buf, "%d\n", > - !!(st->pwr_down_mask & (1 << this_attr->address))); > + !!(st->pwr_down_mask & (1 << chan->channel))); > } > > -static ssize_t ad5624r_write_dac_powerdown(struct device *dev, > - struct device_attribute *attr, > - const char *buf, size_t len) > +static ssize_t ad5624r_write_dac_powerdown(struct iio_dev *indio_dev, > + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, > + size_t len) > { > long readin; > int ret; > - struct iio_dev *indio_dev = dev_get_drvdata(dev); > struct ad5624r_state *st = iio_priv(indio_dev); > - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); > > ret = strict_strtol(buf, 10, &readin); > if (ret) > return ret; > > if (readin == 1) > - st->pwr_down_mask |= (1 << this_attr->address); > + st->pwr_down_mask |= (1 << chan->channel); > else if (!readin) > - st->pwr_down_mask &= ~(1 << this_attr->address); > + st->pwr_down_mask &= ~(1 << chan->channel); > else > ret = -EINVAL; > > @@ -209,47 +154,75 @@ static ssize_t ad5624r_write_dac_powerdown(struct device *dev, > return ret ? ret : len; > } > > -static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO | > - S_IWUSR, ad5624r_read_powerdown_mode, > - ad5624r_write_powerdown_mode, 0); > - > -static IIO_CONST_ATTR(out_voltage_powerdown_mode_available, > - "1kohm_to_gnd 100kohm_to_gnd three_state"); > - > -#define IIO_DEV_ATTR_DAC_POWERDOWN(_num, _show, _store, _addr) \ > - IIO_DEVICE_ATTR(out_voltage##_num##_powerdown, \ > - S_IRUGO | S_IWUSR, _show, _store, _addr) > - > -static IIO_DEV_ATTR_DAC_POWERDOWN(0, ad5624r_read_dac_powerdown, > - ad5624r_write_dac_powerdown, 0); > -static IIO_DEV_ATTR_DAC_POWERDOWN(1, ad5624r_read_dac_powerdown, > - ad5624r_write_dac_powerdown, 1); > -static IIO_DEV_ATTR_DAC_POWERDOWN(2, ad5624r_read_dac_powerdown, > - ad5624r_write_dac_powerdown, 2); > -static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5624r_read_dac_powerdown, > - ad5624r_write_dac_powerdown, 3); > - > -static struct attribute *ad5624r_attributes[] = { > - &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr, > - &iio_dev_attr_out_voltage1_powerdown.dev_attr.attr, > - &iio_dev_attr_out_voltage2_powerdown.dev_attr.attr, > - &iio_dev_attr_out_voltage3_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 ad5624r_attribute_group = { > - .attrs = ad5624r_attributes, > -}; > - > static const struct iio_info ad5624r_info = { > .write_raw = ad5624r_write_raw, > .read_raw = ad5624r_read_raw, > - .attrs = &ad5624r_attribute_group, > .driver_module = THIS_MODULE, > }; > > +static const struct iio_chan_spec_ext_info ad5624r_ext_info[] = { > + { > + .name = "powerdown", > + .read = ad5624r_read_dac_powerdown, > + .write = ad5624r_write_dac_powerdown, > + }, > + IIO_ENUM("powerdown_mode", true, &ad5624r_powerdown_mode_enum), > + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5624r_powerdown_mode_enum), > + { }, > +}; > + > +#define AD5624R_CHANNEL(_chan, _bits) { \ > + .type = IIO_VOLTAGE, \ > + .indexed = 1, \ > + .output = 1, \ > + .channel = (_chan), \ > + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ > + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ > + .address = (_chan), \ > + .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \ > + .ext_info = ad5624r_ext_info, \ > +} > + > +#define DECLARE_AD5624R_CHANNELS(_name, _bits) \ > + const struct iio_chan_spec _name##_channels[] = { \ > + AD5624R_CHANNEL(0, _bits), \ > + AD5624R_CHANNEL(1, _bits), \ > + AD5624R_CHANNEL(2, _bits), \ > + AD5624R_CHANNEL(3, _bits), \ > +} > + > +static DECLARE_AD5624R_CHANNELS(ad5624r, 12); > +static DECLARE_AD5624R_CHANNELS(ad5644r, 14); > +static DECLARE_AD5624R_CHANNELS(ad5664r, 16); > + > +static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = { > + [ID_AD5624R3] = { > + .channels = ad5624r_channels, > + .int_vref_mv = 1250, > + }, > + [ID_AD5624R5] = { > + .channels = ad5624r_channels, > + .int_vref_mv = 2500, > + }, > + [ID_AD5644R3] = { > + .channels = ad5644r_channels, > + .int_vref_mv = 1250, > + }, > + [ID_AD5644R5] = { > + .channels = ad5644r_channels, > + .int_vref_mv = 2500, > + }, > + [ID_AD5664R3] = { > + .channels = ad5664r_channels, > + .int_vref_mv = 1250, > + }, > + [ID_AD5664R5] = { > + .channels = ad5664r_channels, > + .int_vref_mv = 2500, > + }, > +}; > + one too many blank lines. > + > static int __devinit ad5624r_probe(struct spi_device *spi) > { > struct ad5624r_state *st; -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html