diff options
Diffstat (limited to 'drivers/staging/iio/dac/ad5064.c')
| -rw-r--r-- | drivers/staging/iio/dac/ad5064.c | 61 |
1 files changed, 34 insertions, 27 deletions
diff --git a/drivers/staging/iio/dac/ad5064.c b/drivers/staging/iio/dac/ad5064.c index 52fef75..40db679 100644 --- a/drivers/staging/iio/dac/ad5064.c +++ b/drivers/staging/iio/dac/ad5064.c @@ -19,7 +19,8 @@ #include "../sysfs.h" #include "dac.h" -#define AD5064_DAC_CHANNELS 4 +#define AD5064_MAX_DAC_CHANNELS 4 +#define AD5064_MAX_VREFS 4 #define AD5064_ADDR(x) ((x) << 20) #define AD5064_CMD(x) ((x) << 24) @@ -46,11 +47,13 @@ * struct ad5064_chip_info - chip specific information * @shared_vref: whether the vref supply is shared between channels * @channel: channel specification -*/ + * @num_channels: number of channels + */ struct ad5064_chip_info { bool shared_vref; - struct iio_chan_spec channel[AD5064_DAC_CHANNELS]; + const struct iio_chan_spec *channels; + unsigned int num_channels; }; /** @@ -67,10 +70,10 @@ struct ad5064_chip_info { struct ad5064_state { struct spi_device *spi; const struct ad5064_chip_info *chip_info; - struct regulator_bulk_data vref_reg[AD5064_DAC_CHANNELS]; - bool pwr_down[AD5064_DAC_CHANNELS]; - u8 pwr_down_mode[AD5064_DAC_CHANNELS]; - unsigned int dac_cache[AD5064_DAC_CHANNELS]; + struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS]; + bool pwr_down[AD5064_MAX_DAC_CHANNELS]; + u8 pwr_down_mode[AD5064_MAX_DAC_CHANNELS]; + unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS]; /* * DMA (thus cache coherency maintenance) requires the @@ -280,40 +283,44 @@ static struct iio_chan_spec_ext_info ad5064_ext_info[] = { .ext_info = ad5064_ext_info, \ } +#define DECLARE_AD5064_CHANNELS(name, bits) \ +const struct iio_chan_spec name[] = { \ + AD5064_CHANNEL(0, bits), \ + AD5064_CHANNEL(1, bits), \ + AD5064_CHANNEL(2, bits), \ + AD5064_CHANNEL(3, bits), \ +} + +static DECLARE_AD5064_CHANNELS(ad5024_channels, 12); +static DECLARE_AD5064_CHANNELS(ad5044_channels, 14); +static DECLARE_AD5064_CHANNELS(ad5064_channels, 16); + static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { [ID_AD5024] = { .shared_vref = false, - .channel[0] = AD5064_CHANNEL(0, 12), - .channel[1] = AD5064_CHANNEL(1, 12), - .channel[2] = AD5064_CHANNEL(2, 12), - .channel[3] = AD5064_CHANNEL(3, 12), + .channels = ad5024_channels, + .num_channels = 4, }, [ID_AD5044] = { .shared_vref = false, - .channel[0] = AD5064_CHANNEL(0, 14), - .channel[1] = AD5064_CHANNEL(1, 14), - .channel[2] = AD5064_CHANNEL(2, 14), - .channel[3] = AD5064_CHANNEL(3, 14), + .channels = ad5044_channels, + .num_channels = 4, }, [ID_AD5064] = { .shared_vref = false, - .channel[0] = AD5064_CHANNEL(0, 16), - .channel[1] = AD5064_CHANNEL(1, 16), - .channel[2] = AD5064_CHANNEL(2, 16), - .channel[3] = AD5064_CHANNEL(3, 16), + .channels = ad5064_channels, + .num_channels = 4, }, [ID_AD5064_1] = { .shared_vref = true, - .channel[0] = AD5064_CHANNEL(0, 16), - .channel[1] = AD5064_CHANNEL(1, 16), - .channel[2] = AD5064_CHANNEL(2, 16), - .channel[3] = AD5064_CHANNEL(3, 16), + .channels = ad5064_channels, + .num_channels = 4, }, }; static inline unsigned int ad5064_num_vref(struct ad5064_state *st) { - return st->chip_info->shared_vref ? 1 : AD5064_DAC_CHANNELS; + return st->chip_info->shared_vref ? 1 : st->chip_info->num_channels; } static const char * const ad5064_vref_names[] = { @@ -359,7 +366,7 @@ static int __devinit ad5064_probe(struct spi_device *spi) if (ret) goto error_free_reg; - for (i = 0; i < AD5064_DAC_CHANNELS; ++i) { + for (i = 0; i < st->chip_info->num_channels; ++i) { st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K; st->dac_cache[i] = 0x8000; } @@ -368,8 +375,8 @@ static int __devinit ad5064_probe(struct spi_device *spi) indio_dev->name = spi_get_device_id(spi)->name; indio_dev->info = &ad5064_info; indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channel; - indio_dev->num_channels = AD5064_DAC_CHANNELS; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; ret = iio_device_register(indio_dev); if (ret) |