From 4571b39b0b08ff855707011c6f7fa04ceb43e5ca Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 4 Jun 2012 11:36:18 +0200 Subject: [PATCH] staging:iio:dac:ad5791: 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/ad5791.c | 122 ++++++++++++++----------------- 1 file changed, 53 insertions(+), 69 deletions(-) diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c index 13d8b5bb1cea..ad33725dd3a4 100644 --- a/drivers/staging/iio/dac/ad5791.c +++ b/drivers/staging/iio/dac/ad5791.c @@ -72,71 +72,50 @@ static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val) return ret; } -#define AD5791_CHAN(bits, shift) { \ - .type = IIO_VOLTAGE, \ - .output = 1, \ - .indexed = 1, \ - .address = AD5791_ADDR_DAC0, \ - .channel = 0, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT | \ - IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ - .scan_type = IIO_ST('u', bits, 24, shift) \ -} - -static const struct iio_chan_spec ad5791_channels[] = { - [ID_AD5760] = AD5791_CHAN(16, 4), - [ID_AD5780] = AD5791_CHAN(18, 2), - [ID_AD5781] = AD5791_CHAN(18, 2), - [ID_AD5791] = AD5791_CHAN(20, 0) +static const char * const ad5791_powerdown_modes[] = { + "6kohm_to_gnd", + "three_state", }; -static ssize_t ad5791_read_powerdown_mode(struct device *dev, - struct device_attribute *attr, char *buf) +static int ad5791_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 ad5791_state *st = iio_priv(indio_dev); - const char mode[][14] = {"6kohm_to_gnd", "three_state"}; - - return sprintf(buf, "%s\n", mode[st->pwr_down_mode]); + return st->pwr_down_mode; } -static ssize_t ad5791_write_powerdown_mode(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static int ad5791_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 ad5791_state *st = iio_priv(indio_dev); - int ret; - if (sysfs_streq(buf, "6kohm_to_gnd")) - st->pwr_down_mode = AD5791_DAC_PWRDN_6K; - else if (sysfs_streq(buf, "three_state")) - st->pwr_down_mode = AD5791_DAC_PWRDN_3STATE; - else - ret = -EINVAL; + st->pwr_down_mode = mode; - return ret ? ret : len; + return 0; } -static ssize_t ad5791_read_dac_powerdown(struct device *dev, - struct device_attribute *attr, - char *buf) +static const struct iio_enum ad5791_powerdown_mode_enum = { + .items = ad5791_powerdown_modes, + .num_items = ARRAY_SIZE(ad5791_powerdown_modes), + .get = ad5791_get_powerdown_mode, + .set = ad5791_set_powerdown_mode, +}; + +static ssize_t ad5791_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 ad5791_state *st = iio_priv(indio_dev); return sprintf(buf, "%d\n", st->pwr_down); } -static ssize_t ad5791_write_dac_powerdown(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static ssize_t ad5791_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 ad5791_state *st = iio_priv(indio_dev); ret = strict_strtol(buf, 10, &readin); @@ -160,31 +139,6 @@ static ssize_t ad5791_write_dac_powerdown(struct device *dev, return ret ? ret : len; } -static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO | - S_IWUSR, ad5791_read_powerdown_mode, - ad5791_write_powerdown_mode, 0); - -static IIO_CONST_ATTR(out_voltage_powerdown_mode_available, - "6kohm_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, ad5791_read_dac_powerdown, - ad5791_write_dac_powerdown, 0); - -static struct attribute *ad5791_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 ad5791_attribute_group = { - .attrs = ad5791_attributes, -}; - static int ad5791_get_lin_comp(unsigned int span) { if (span <= 10000) @@ -254,6 +208,37 @@ static int ad5791_read_raw(struct iio_dev *indio_dev, }; +static const struct iio_chan_spec_ext_info ad5791_ext_info[] = { + { + .name = "powerdown", + .shared = true, + .read = ad5791_read_dac_powerdown, + .write = ad5791_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", true, &ad5791_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5791_powerdown_mode_enum), + { }, +}; + +#define AD5791_CHAN(bits, shift) { \ + .type = IIO_VOLTAGE, \ + .output = 1, \ + .indexed = 1, \ + .address = AD5791_ADDR_DAC0, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ + .scan_type = IIO_ST('u', bits, 24, shift), \ + .ext_info = ad5791_ext_info, \ +} + +static const struct iio_chan_spec ad5791_channels[] = { + [ID_AD5760] = AD5791_CHAN(16, 4), + [ID_AD5780] = AD5791_CHAN(18, 2), + [ID_AD5781] = AD5791_CHAN(18, 2), + [ID_AD5791] = AD5791_CHAN(20, 0) +}; static int ad5791_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, @@ -278,7 +263,6 @@ static int ad5791_write_raw(struct iio_dev *indio_dev, static const struct iio_info ad5791_info = { .read_raw = &ad5791_read_raw, .write_raw = &ad5791_write_raw, - .attrs = &ad5791_attribute_group, .driver_module = THIS_MODULE, }; -- 2.20.1