On Fri, 16 Jul 2021 14:42:09 +0300 Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> wrote: > The ADRF6780 is a silicon germanium (SiGe) design, wideband, > microwave upconverter optimized for point to point microwave > radio designs operating in the 5.9 GHz to 23.6 GHz frequency > range. > > Datasheet: > https://www.analog.com/media/en/technical-documentation/data-sheets/ADRF6780.pdf > > Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> Hi Antoniu As it looks like we'll have a v7, a few trivial comments from me. ... > + > +static int adrf6780_init(struct adrf6780_dev *dev) > +{ > + int ret; > + unsigned int chip_id, enable_reg, enable_reg_msk; > + struct spi_device *spi = dev->spi; > + > + /* Perform a software reset */ > + ret = adrf6780_reset(dev); > + if (ret) > + return ret; > + > + ret = adrf6780_spi_read(dev, ADRF6780_REG_CONTROL, &chip_id); > + if (ret) > + return ret; > + > + chip_id = FIELD_GET(ADRF6780_CHIP_ID_MSK, chip_id); > + if (chip_id != ADRF6780_CHIP_ID) { > + dev_err(&spi->dev, "ADRF6780 Invalid Chip ID.\n"); > + return -EINVAL; > + } > + > + enable_reg_msk = ADRF6780_VGA_BUFFER_EN_MSK | > + ADRF6780_DETECTOR_EN_MSK | > + ADRF6780_LO_BUFFER_EN_MSK | > + ADRF6780_IF_MODE_EN_MSK | > + ADRF6780_IQ_MODE_EN_MSK | > + ADRF6780_LO_X2_EN_MSK | > + ADRF6780_LO_PPF_EN_MSK | > + ADRF6780_LO_EN_MSK | > + ADRF6780_UC_BIAS_EN_MSK; > + > + enable_reg = FIELD_PREP(ADRF6780_VGA_BUFFER_EN_MSK, dev->vga_buff_en) | > + FIELD_PREP(ADRF6780_DETECTOR_EN_MSK, 1) | > + FIELD_PREP(ADRF6780_LO_BUFFER_EN_MSK, dev->lo_buff_en) | > + FIELD_PREP(ADRF6780_IF_MODE_EN_MSK, dev->if_mode_en) | > + FIELD_PREP(ADRF6780_IQ_MODE_EN_MSK, dev->iq_mode_en) | > + FIELD_PREP(ADRF6780_LO_X2_EN_MSK, dev->lo_x2_en) | > + FIELD_PREP(ADRF6780_LO_PPF_EN_MSK, dev->lo_ppf_en) | > + FIELD_PREP(ADRF6780_LO_EN_MSK, dev->lo_en) | > + FIELD_PREP(ADRF6780_UC_BIAS_EN_MSK, dev->uc_bias_en); Here we are probably turning on a bunch of stuff which will result in power usage. Would it be sensible to turn it off again in remove path? (devm managed should be fine). > + > + ret = adrf6780_spi_update_bits(dev, ADRF6780_REG_ENABLE, enable_reg_msk, enable_reg); > + if (ret) > + return ret; > + > + ret = adrf6780_spi_update_bits(dev, ADRF6780_REG_LO_PATH, > + ADRF6780_LO_SIDEBAND_MSK, > + FIELD_PREP(ADRF6780_LO_SIDEBAND_MSK, dev->lo_sideband)); > + if (ret) > + return ret; > + > + return adrf6780_spi_update_bits(dev, ADRF6780_REG_ADC_CONTROL, > + ADRF6780_VDET_OUTPUT_SELECT_MSK, > + FIELD_PREP(ADRF6780_VDET_OUTPUT_SELECT_MSK, dev->vdet_out_en)); > +} > + > +static void adrf6780_dt_parse(struct adrf6780_dev *dev) Trivial nitpick, but given this is all device property based (great) the dt naming is now misleading. Perhaps _properties_parse() ? > +{ > + struct spi_device *spi = dev->spi; > + > + dev->vga_buff_en = device_property_read_bool(&spi->dev, "adi,vga-buff-en"); > + dev->lo_buff_en = device_property_read_bool(&spi->dev, "adi,lo-buff-en"); > + dev->if_mode_en = device_property_read_bool(&spi->dev, "adi,if-mode-en"); > + dev->iq_mode_en = device_property_read_bool(&spi->dev, "adi,iq-mode-en"); > + dev->lo_x2_en = device_property_read_bool(&spi->dev, "adi,lo-x2-en"); > + dev->lo_ppf_en = device_property_read_bool(&spi->dev, "adi,lo-ppf-en"); > + dev->lo_en = device_property_read_bool(&spi->dev, "adi,lo-en"); > + dev->uc_bias_en = device_property_read_bool(&spi->dev, "adi,uc-bias-en"); > + dev->lo_sideband = device_property_read_bool(&spi->dev, "adi,lo-sideband"); > + dev->vdet_out_en = device_property_read_bool(&spi->dev, "adi,vdet-out-en"); > +}
