diff options
| -rw-r--r-- | drivers/iio/adc/ti-adc081c.c | 77 |
1 files changed, 64 insertions, 13 deletions
diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c index b977340fbdb8..9fd032d9f402 100644 --- a/drivers/iio/adc/ti-adc081c.c +++ b/drivers/iio/adc/ti-adc081c.c @@ -24,6 +24,9 @@ #include <linux/of.h> #include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> #include <linux/regulator/consumer.h> struct adc081c { @@ -69,21 +72,42 @@ static int adc081c_read_raw(struct iio_dev *iio, return -EINVAL; } -static const struct iio_chan_spec adc081c_channel = { - .type = IIO_VOLTAGE, - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), -}; +#define ADCxx1C_CHAN(_bits) { \ + .type = IIO_VOLTAGE, \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = (_bits), \ + .storagebits = 16, \ + .shift = 12 - (_bits), \ + .endianness = IIO_CPU, \ + }, \ +} + +#define DEFINE_ADCxx1C_CHANNELS(_name, _bits) \ + static const struct iio_chan_spec _name ## _channels[] = { \ + ADCxx1C_CHAN((_bits)), \ + IIO_CHAN_SOFT_TIMESTAMP(1), \ + }; \ + +#define ADC081C_NUM_CHANNELS 2 struct adcxx1c_model { + const struct iio_chan_spec* channels; int bits; }; -#define ADCxx1C_MODEL(_bits) \ +#define ADCxx1C_MODEL(_name, _bits) \ { \ + .channels = _name ## _channels, \ .bits = (_bits), \ } +DEFINE_ADCxx1C_CHANNELS(adc081c, 8); +DEFINE_ADCxx1C_CHANNELS(adc101c, 10); +DEFINE_ADCxx1C_CHANNELS(adc121c, 12); + /* Model ids are indexes in _models array */ enum adcxx1c_model_id { ADC081C = 0, @@ -92,9 +116,9 @@ enum adcxx1c_model_id { }; static struct adcxx1c_model adcxx1c_models[] = { - ADCxx1C_MODEL( 8), - ADCxx1C_MODEL(10), - ADCxx1C_MODEL(12), + ADCxx1C_MODEL(adc081c, 8), + ADCxx1C_MODEL(adc101c, 10), + ADCxx1C_MODEL(adc121c, 12), }; static const struct iio_info adc081c_info = { @@ -102,6 +126,24 @@ static const struct iio_info adc081c_info = { .driver_module = THIS_MODULE, }; +static irqreturn_t adc081c_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct adc081c *data = iio_priv(indio_dev); + u16 buf[8]; /* 2 bytes data + 6 bytes padding + 8 bytes timestamp */ + int ret; + + ret = i2c_smbus_read_word_swapped(data->i2c, REG_CONV_RES); + if (ret < 0) + goto out; + buf[0] = ret; + iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns()); +out: + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + static int adc081c_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -134,18 +176,26 @@ static int adc081c_probe(struct i2c_client *client, iio->modes = INDIO_DIRECT_MODE; iio->info = &adc081c_info; - iio->channels = &adc081c_channel; - iio->num_channels = 1; + iio->channels = model->channels; + iio->num_channels = ADC081C_NUM_CHANNELS; + + err = iio_triggered_buffer_setup(iio, NULL, adc081c_trigger_handler, NULL); + if (err < 0) { + dev_err(&client->dev, "iio triggered buffer setup failed\n"); + goto err_regulator_disable; + } err = iio_device_register(iio); if (err < 0) - goto regulator_disable; + goto err_buffer_cleanup; i2c_set_clientdata(client, iio); return 0; -regulator_disable: +err_buffer_cleanup: + iio_triggered_buffer_cleanup(iio); +err_regulator_disable: regulator_disable(adc->ref); return err; @@ -157,6 +207,7 @@ static int adc081c_remove(struct i2c_client *client) struct adc081c *adc = iio_priv(iio); iio_device_unregister(iio); + iio_triggered_buffer_cleanup(iio); regulator_disable(adc->ref); return 0; |