From 66eb90505eaf38f3e88491eb9090cd7be7c2da03 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 4 Jun 2012 11:36:16 +0200 Subject: [PATCH] staging:iio:dac:ad5624r: Convert to extended channel attributes Use extended channel attributes instead of raw sysfs files for the additional channel attributes. This allows us to remove some boilerplate code. Signed-off-by: Lars-Peter Clausen Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/dac/ad5624r_spi.c | 208 +++++++++++--------------- 1 file changed, 90 insertions(+), 118 deletions(-) diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c index 42ff644ac43e..4c95eae1f3ac 100644 --- a/drivers/staging/iio/dac/ad5624r_spi.c +++ b/drivers/staging/iio/dac/ad5624r_spi.c @@ -21,56 +21,6 @@ #include "dac.h" #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_to_iio_dev(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_to_iio_dev(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_to_iio_dev(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_to_iio_dev(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 +154,74 @@ 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, + }, +}; + static int __devinit ad5624r_probe(struct spi_device *spi) { struct ad5624r_state *st;