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In preparation for supporting additional parts of the ADE9000 family, move these part-specific values into a new struct ade9000_chip_info and retrieve it via spi_get_device_match_data() at probe time. The channel table and its size are also referenced through the chip_info so that parts with a different channel layout can be added without touching the probe path. No functional change intended for the ADE9000. Signed-off-by: Antoniu Miclaus --- drivers/iio/adc/ade9000.c | 63 +++++++++++++++++++++++++++++---------- 1 file changed, 47 insertions(+), 16 deletions(-) diff --git a/drivers/iio/adc/ade9000.c b/drivers/iio/adc/ade9000.c index b80cdd8ad982..38a5c7e043b3 100644 --- a/drivers/iio/adc/ade9000.c +++ b/drivers/iio/adc/ade9000.c @@ -242,14 +242,6 @@ #define ADE9000_LAST_PAGE_BIT BIT(15) #define ADE9000_MIDDLE_PAGE_BIT BIT(7) -/* - * Full scale Codes referred from Datasheet. Respective digital codes are - * produced when ADC inputs are at full scale. - */ -#define ADE9000_RMS_FULL_SCALE_CODES 52866837 -#define ADE9000_WATT_FULL_SCALE_CODES 20694066 -#define ADE9000_PCF_FULL_SCALE_CODES 74770000 - /* Phase and channel definitions */ #define ADE9000_PHASE_A_NR 0 #define ADE9000_PHASE_B_NR 1 @@ -290,7 +282,29 @@ enum ade9000_wfb_cfg { #define ADE9000_ADDR_ADJUST(addr, chan) \ (((chan) == 0 ? 0 : (chan) == 1 ? 2 : 4) << 4 | (addr)) +/** + * struct ade9000_chip_info - part-specific configuration + * @name: IIO device name reported to userspace + * @channels: channel specification for this part + * @num_channels: number of entries in @channels + * @rms_full_scale_codes: digital code produced at full-scale RMS input + * @watt_full_scale_codes: digital code produced at full-scale power input + * @pcf_full_scale_codes: digital code produced at full-scale xI_PCF/xV_PCF input + * + * The full-scale codes are taken from the respective datasheets and are used to + * derive the IIO scale of the raw measurement channels. + */ +struct ade9000_chip_info { + const char *name; + const struct iio_chan_spec *channels; + unsigned int num_channels; + unsigned int rms_full_scale_codes; + unsigned int watt_full_scale_codes; + unsigned int pcf_full_scale_codes; +}; + struct ade9000_state { + const struct ade9000_chip_info *info; struct completion reset_completion; struct mutex lock; /* Protects SPI transactions */ u8 wf_src; @@ -623,6 +637,19 @@ static const struct iio_chan_spec ade9000_channels[] = { ADE9000_POWER_FACTOR_CHANNEL(ADE9000_PHASE_C_NR), }; +/* + * Full-scale codes referred from the datasheet. These are the digital codes + * produced when the ADC inputs are at full scale. + */ +static const struct ade9000_chip_info ade9000_chip_info = { + .name = "ade9000", + .channels = ade9000_channels, + .num_channels = ARRAY_SIZE(ade9000_channels), + .rms_full_scale_codes = 52866837, + .watt_full_scale_codes = 20694066, + .pcf_full_scale_codes = 74770000, +}; + static const struct reg_sequence ade9000_initialization_sequence[] = { { ADE9000_REG_PGA_GAIN, ADE9000_PGA_GAIN }, { ADE9000_REG_CONFIG0, ADE9000_CONFIG0 }, @@ -1064,7 +1091,7 @@ static int ade9000_read_raw(struct iio_dev *indio_dev, case ADE9000_REG_CI_PCF: case ADE9000_REG_CV_PCF: *val = 1; - *val2 = ADE9000_PCF_FULL_SCALE_CODES; + *val2 = st->info->pcf_full_scale_codes; return IIO_VAL_FRACTIONAL; case ADE9000_REG_AIRMS: case ADE9000_REG_AVRMS: @@ -1073,14 +1100,14 @@ static int ade9000_read_raw(struct iio_dev *indio_dev, case ADE9000_REG_CIRMS: case ADE9000_REG_CVRMS: *val = 1; - *val2 = ADE9000_RMS_FULL_SCALE_CODES; + *val2 = st->info->rms_full_scale_codes; return IIO_VAL_FRACTIONAL; default: return -EINVAL; } case IIO_POWER: *val = 1; - *val2 = ADE9000_WATT_FULL_SCALE_CODES; + *val2 = st->info->watt_full_scale_codes; return IIO_VAL_FRACTIONAL; default: break; @@ -1692,6 +1719,10 @@ static int ade9000_probe(struct spi_device *spi) st = iio_priv(indio_dev); + st->info = spi_get_device_match_data(spi); + if (!st->info) + return -ENODEV; + regmap = devm_regmap_init(dev, NULL, st, &ade9000_regmap_config); if (IS_ERR(regmap)) return dev_err_probe(dev, PTR_ERR(regmap), "Unable to allocate ADE9000 regmap"); @@ -1726,7 +1757,7 @@ static int ade9000_probe(struct spi_device *spi) if (ret) return ret; - indio_dev->name = "ade9000"; + indio_dev->name = st->info->name; indio_dev->info = &ade9000_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->setup_ops = &ade9000_buffer_ops; @@ -1736,8 +1767,8 @@ static int ade9000_probe(struct spi_device *spi) return dev_err_probe(&spi->dev, ret, "Failed to get and enable vdd regulator\n"); - indio_dev->channels = ade9000_channels; - indio_dev->num_channels = ARRAY_SIZE(ade9000_channels); + indio_dev->channels = st->info->channels; + indio_dev->num_channels = st->info->num_channels; ret = devm_iio_kfifo_buffer_setup(dev, indio_dev, &ade9000_buffer_ops); @@ -1768,13 +1799,13 @@ static int ade9000_probe(struct spi_device *spi) }; static const struct spi_device_id ade9000_id[] = { - { .name = "ade9000" }, + { .name = "ade9000", .driver_data = (kernel_ulong_t)&ade9000_chip_info }, { } }; MODULE_DEVICE_TABLE(spi, ade9000_id); static const struct of_device_id ade9000_of_match[] = { - { .compatible = "adi,ade9000" }, + { .compatible = "adi,ade9000", .data = &ade9000_chip_info }, { } }; MODULE_DEVICE_TABLE(of, ade9000_of_match); -- 2.43.0