diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7291.c')
-rw-r--r-- | drivers/staging/iio/adc/ad7291.c | 219 |
1 files changed, 79 insertions, 140 deletions
diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c index ccaa8d6f8bc..d13f8aeeb62 100644 --- a/drivers/staging/iio/adc/ad7291.c +++ b/drivers/staging/iio/adc/ad7291.c @@ -164,97 +164,14 @@ static irqreturn_t ad7291_event_handler(int irq, void *private) return IRQ_HANDLED; } -static inline ssize_t ad7291_show_hyst(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad7291_chip_info *chip = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - u16 data; - int ret; - - ret = ad7291_i2c_read(chip, this_attr->address, &data); - if (ret < 0) - return ret; - - return sprintf(buf, "%d\n", data & AD7291_VALUE_MASK); -} - -static inline ssize_t ad7291_set_hyst(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad7291_chip_info *chip = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - u16 data; - int ret; - - ret = kstrtou16(buf, 10, &data); - - if (ret < 0) - return ret; - if (data > AD7291_VALUE_MASK) - return -EINVAL; - - ret = ad7291_i2c_write(chip, this_attr->address, data); - if (ret < 0) - return ret; - - return len; -} - -static IIO_DEVICE_ATTR(in_temp0_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, - AD7291_HYST(8)); -static IIO_DEVICE_ATTR(in_voltage0_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(0)); -static IIO_DEVICE_ATTR(in_voltage1_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(1)); -static IIO_DEVICE_ATTR(in_voltage2_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(2)); -static IIO_DEVICE_ATTR(in_voltage3_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(3)); -static IIO_DEVICE_ATTR(in_voltage4_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(4)); -static IIO_DEVICE_ATTR(in_voltage5_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(5)); -static IIO_DEVICE_ATTR(in_voltage6_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(6)); -static IIO_DEVICE_ATTR(in_voltage7_thresh_both_hyst_raw, - S_IRUGO | S_IWUSR, - ad7291_show_hyst, ad7291_set_hyst, AD7291_HYST(7)); - -static struct attribute *ad7291_event_attributes[] = { - &iio_dev_attr_in_temp0_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage0_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage1_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage2_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage3_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage4_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage5_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage6_thresh_both_hyst_raw.dev_attr.attr, - &iio_dev_attr_in_voltage7_thresh_both_hyst_raw.dev_attr.attr, - NULL, -}; - -static unsigned int ad7291_threshold_reg(u64 event_code) +static unsigned int ad7291_threshold_reg(const struct iio_chan_spec *chan, + enum iio_event_direction dir, enum iio_event_info info) { unsigned int offset; - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + switch (chan->type) { case IIO_VOLTAGE: - offset = IIO_EVENT_CODE_EXTRACT_CHAN(event_code); + offset = chan->channel; break; case IIO_TEMP: offset = 8; @@ -263,69 +180,78 @@ static unsigned int ad7291_threshold_reg(u64 event_code) return 0; } - if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) - return AD7291_DATA_LOW(offset); - else - return AD7291_DATA_HIGH(offset); + switch (info) { + case IIO_EV_INFO_VALUE: + if (dir == IIO_EV_DIR_FALLING) + return AD7291_DATA_HIGH(offset); + else + return AD7291_DATA_LOW(offset); + case IIO_EV_INFO_HYSTERESIS: + return AD7291_HYST(offset); + default: + break; + } + return 0; } static int ad7291_read_event_value(struct iio_dev *indio_dev, - u64 event_code, - int *val) + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) { struct ad7291_chip_info *chip = iio_priv(indio_dev); int ret; u16 uval; - ret = ad7291_i2c_read(chip, ad7291_threshold_reg(event_code), &uval); + ret = ad7291_i2c_read(chip, ad7291_threshold_reg(chan, dir, info), + &uval); if (ret < 0) return ret; - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { - case IIO_VOLTAGE: + if (info == IIO_EV_INFO_HYSTERESIS || chan->type == IIO_VOLTAGE) *val = uval & AD7291_VALUE_MASK; - return 0; - case IIO_TEMP: + + else *val = sign_extend32(uval, 11); - return 0; - default: - return -EINVAL; - } + + return IIO_VAL_INT; } static int ad7291_write_event_value(struct iio_dev *indio_dev, - u64 event_code, - int val) + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) { struct ad7291_chip_info *chip = iio_priv(indio_dev); - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { - case IIO_VOLTAGE: + if (info == IIO_EV_INFO_HYSTERESIS || chan->type == IIO_VOLTAGE) { if (val > AD7291_VALUE_MASK || val < 0) return -EINVAL; - break; - case IIO_TEMP: + } else { if (val > 2047 || val < -2048) return -EINVAL; - break; - default: - return -EINVAL; } - return ad7291_i2c_write(chip, ad7291_threshold_reg(event_code), val); + return ad7291_i2c_write(chip, ad7291_threshold_reg(chan, dir, info), + val); } static int ad7291_read_event_config(struct iio_dev *indio_dev, - u64 event_code) + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) { struct ad7291_chip_info *chip = iio_priv(indio_dev); /* To be enabled the channel must simply be on. If any are enabled we are in continuous sampling mode */ - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + switch (chan->type) { case IIO_VOLTAGE: - if (chip->c_mask & - (1 << (15 - IIO_EVENT_CODE_EXTRACT_CHAN(event_code)))) + if (chip->c_mask & (1 << (15 - chan->channel))) return 1; else return 0; @@ -339,11 +265,14 @@ static int ad7291_read_event_config(struct iio_dev *indio_dev, } static int ad7291_write_event_config(struct iio_dev *indio_dev, - u64 event_code, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, int state) { int ret = 0; struct ad7291_chip_info *chip = iio_priv(indio_dev); + unsigned int mask; u16 regval; mutex_lock(&chip->state_lock); @@ -354,16 +283,14 @@ static int ad7291_write_event_config(struct iio_dev *indio_dev, * Possible to disable temp as well but that makes single read tricky. */ - switch (IIO_EVENT_CODE_EXTRACT_TYPE(event_code)) { + mask = BIT(15 - chan->channel); + + switch (chan->type) { case IIO_VOLTAGE: - if ((!state) && (chip->c_mask & (1 << (15 - - IIO_EVENT_CODE_EXTRACT_CHAN(event_code))))) - chip->c_mask &= ~(1 << (15 - IIO_EVENT_CODE_EXTRACT_CHAN - (event_code))); - else if (state && (!(chip->c_mask & (1 << (15 - - IIO_EVENT_CODE_EXTRACT_CHAN(event_code)))))) - chip->c_mask |= (1 << (15 - IIO_EVENT_CODE_EXTRACT_CHAN - (event_code))); + if ((!state) && (chip->c_mask & mask)) + chip->c_mask &= ~mask; + else if (state && (!(chip->c_mask & mask))) + chip->c_mask |= mask; else break; @@ -473,6 +400,24 @@ static int ad7291_read_raw(struct iio_dev *indio_dev, } } +static const struct iio_event_spec ad7291_events[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS), + }, +}; + #define AD7291_VOLTAGE_CHAN(_chan) \ { \ .type = IIO_VOLTAGE, \ @@ -480,8 +425,8 @@ static int ad7291_read_raw(struct iio_dev *indio_dev, .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ .indexed = 1, \ .channel = _chan, \ - .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING)|\ - IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING) \ + .event_spec = ad7291_events, \ + .num_event_specs = ARRAY_SIZE(ad7291_events), \ } static const struct iio_chan_spec ad7291_channels[] = { @@ -500,23 +445,17 @@ static const struct iio_chan_spec ad7291_channels[] = { BIT(IIO_CHAN_INFO_SCALE), .indexed = 1, .channel = 0, - .event_mask = - IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING)| - IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING) + .event_spec = ad7291_events, + .num_event_specs = ARRAY_SIZE(ad7291_events), } }; -static struct attribute_group ad7291_event_attribute_group = { - .attrs = ad7291_event_attributes, -}; - static const struct iio_info ad7291_info = { .read_raw = &ad7291_read_raw, - .read_event_config = &ad7291_read_event_config, - .write_event_config = &ad7291_write_event_config, - .read_event_value = &ad7291_read_event_value, - .write_event_value = &ad7291_write_event_value, - .event_attrs = &ad7291_event_attribute_group, + .read_event_config_new = &ad7291_read_event_config, + .write_event_config_new = &ad7291_write_event_config, + .read_event_value_new = &ad7291_read_event_value, + .write_event_value_new = &ad7291_write_event_value, .driver_module = THIS_MODULE, }; |