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charset="utf-8" Add a new compatible for the AD777x AXI IP core, a variant of the generic AXI ADC IP. While sharing some operations with the generic AXI ADC IP, the AD777x variant has specific requirements such as setting number of lanes. Signed-off-by: Ioana Risteiu Acked-by: Rob Herring (Arm) --- Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml b/D= ocumentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml index e91e421a3d6b..1265ec5390d1 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml @@ -30,6 +30,7 @@ description: | https://analogdevicesinc.github.io/hdl/library/axi_ad408x/index.html https://analogdevicesinc.github.io/hdl/library/axi_ad485x/index.html http://analogdevicesinc.github.io/hdl/library/axi_ad7606x/index.html + https://analogdevicesinc.github.io/hdl/library/axi_ad777x/index.html =20 properties: compatible: @@ -38,6 +39,7 @@ properties: - adi,axi-ad408x - adi,axi-ad7606x - adi,axi-ad485x + - adi,axi-ad777x =20 reg: maxItems: 1 --=20 2.47.2 From nobody Sun Oct 5 23:52:23 2025 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D41526B748; 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charset="utf-8" Add new compatible string and corresponding iio_backend_ops for AD777x axi family. Signed-off-by: Ioana Risteiu --- drivers/iio/adc/adi-axi-adc.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c index 2d86bb0e08a7..c4b8ec6d9397 100644 --- a/drivers/iio/adc/adi-axi-adc.c +++ b/drivers/iio/adc/adi-axi-adc.c @@ -670,6 +670,25 @@ static const struct iio_backend_info axi_ad408x =3D { .ops =3D &adi_ad408x_ops, }; =20 +static const struct iio_backend_ops adi_ad777x_ops =3D { + .enable =3D axi_adc_enable, + .disable =3D axi_adc_disable, + .chan_enable =3D axi_adc_chan_enable, + .chan_disable =3D axi_adc_chan_disable, + .request_buffer =3D axi_adc_request_buffer, + .free_buffer =3D axi_adc_free_buffer, + .data_sample_trigger =3D axi_adc_data_sample_trigger, + .chan_status =3D axi_adc_chan_status, + .debugfs_reg_access =3D iio_backend_debugfs_ptr(axi_adc_reg_access), + .debugfs_print_chan_status =3D iio_backend_debugfs_ptr(axi_adc_debugfs_pr= int_chan_status), + .num_lanes_set =3D axi_adc_num_lanes_set, +}; + +static const struct iio_backend_info axi_ad777x =3D { + .name =3D "axi-ad777x", + .ops =3D &adi_ad777x_ops, +}; + static int adi_axi_adc_probe(struct platform_device *pdev) { struct adi_axi_adc_state *st; @@ -790,12 +809,18 @@ static const struct axi_adc_info adi_axi_ad408x =3D { .backend_info =3D &axi_ad408x, }; =20 +static const struct axi_adc_info adi_axi_ad777x =3D { + .version =3D ADI_AXI_PCORE_VER(10, 0, 'a'), + .backend_info =3D &axi_ad777x, +}; + /* Match table for of_platform binding */ static const struct of_device_id adi_axi_adc_of_match[] =3D { { .compatible =3D "adi,axi-adc-10.0.a", .data =3D &adc_generic }, { .compatible =3D "adi,axi-ad408x", .data =3D &adi_axi_ad408x }, { .compatible =3D "adi,axi-ad485x", .data =3D &adi_axi_ad485x }, { .compatible =3D "adi,axi-ad7606x", .data =3D &adc_ad7606 }, + { .compatible =3D "adi,axi-ad777x", .data =3D &adi_axi_ad777x}, { } }; MODULE_DEVICE_TABLE(of, adi_axi_adc_of_match); --=20 2.47.2 From nobody Sun Oct 5 23:52:23 2025 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8270526B2CE; 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charset="utf-8" Add the generic io-backends property to the AD7779 binding to enable support for the IIO backend framework. Signed-off-by: Ioana Risteiu Reviewed-by: Rob Herring (Arm) --- .../bindings/iio/adc/adi,ad7779.yaml | 26 ++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7779.yaml b/Do= cumentation/devicetree/bindings/iio/adc/adi,ad7779.yaml index 044f92f39cfa..4adae4f0ec98 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7779.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7779.yaml @@ -80,11 +80,19 @@ properties: reset-gpios: maxItems: 1 =20 + io-backends: + maxItems: 1 + required: - compatible - reg - clocks - - interrupts + +oneOf: + - required: + - interrupts + - required: + - io-backends =20 unevaluatedProperties: false =20 @@ -107,4 +115,20 @@ examples: clocks =3D <&adc_clk>; }; }; + + - | + #include + spi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + adc@0 { + compatible =3D "adi,ad7779"; + reg =3D <0>; + start-gpios =3D <&gpio0 87 GPIO_ACTIVE_LOW>; + reset-gpios =3D <&gpio0 93 GPIO_ACTIVE_LOW>; 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charset="utf-8" Add a new functionality to ad7779 driver that streams data through data output interface using IIO backend interface. Signed-off-by: Ioana Risteiu --- drivers/iio/adc/ad7779.c | 299 +++++++++++++++++++++++++++++++++------ 1 file changed, 256 insertions(+), 43 deletions(-) diff --git a/drivers/iio/adc/ad7779.c b/drivers/iio/adc/ad7779.c index 845adc510239..872c551eadf6 100644 --- a/drivers/iio/adc/ad7779.c +++ b/drivers/iio/adc/ad7779.c @@ -31,6 +31,8 @@ #include #include =20 +#include + #define AD7779_SPI_READ_CMD BIT(7) =20 #define AD7779_DISABLE_SD BIT(7) @@ -116,6 +118,12 @@ #define AD7779_CRC8_POLY 0x07 DECLARE_CRC8_TABLE(ad7779_crc8_table); =20 +enum ad7779_data_lines { + AD7779_4LINES, + AD7779_2LINES, + AD7779_1LINE, +}; + enum ad7779_filter { AD7779_SINC3, AD7779_SINC5, @@ -157,6 +165,8 @@ struct ad7779_state { u8 reg_rx_buf[3]; u8 reg_tx_buf[3]; u8 reset_buf[8]; + + struct iio_backend *back; }; =20 static const char * const ad7779_filter_type[] =3D { @@ -164,6 +174,12 @@ static const char * const ad7779_filter_type[] =3D { [AD7779_SINC5] =3D "sinc5", }; =20 +static const char * const ad7779_data_lines_modes[] =3D { + [AD7779_4LINES] =3D "4_data_lines", + [AD7779_2LINES] =3D "2_data_lines", + [AD7779_1LINE] =3D "1_data_line", +}; + static const char * const ad7779_power_supplies[] =3D { "avdd1", "avdd2", "avdd4", }; @@ -339,6 +355,59 @@ static int ad7779_set_sampling_frequency(struct ad7779= _state *st, return 0; } =20 +static int ad7779_set_data_lines(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + unsigned int mode) +{ + struct ad7779_state *st =3D iio_priv(indio_dev); + int ret; + + ret =3D ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT, + AD7779_DOUT_FORMAT_MSK, + FIELD_PREP(AD7779_DOUT_FORMAT_MSK, mode)); + switch (mode) { + case AD7779_4LINES: + ret =3D ad7779_set_sampling_frequency(st, AD7779_DEFAULT_SAMPLING_FREQ); + if (ret) + return ret; + ret =3D iio_backend_num_lanes_set(st->back, 4); + break; + case AD7779_2LINES: + ret =3D ad7779_set_sampling_frequency(st, AD7779_DEFAULT_SAMPLING_2LINE); + if (ret) + return ret; + ret =3D iio_backend_num_lanes_set(st->back, 2); + break; + case AD7779_1LINE: + ret =3D ad7779_set_sampling_frequency(st, AD7779_DEFAULT_SAMPLING_1LINE); + if (ret) + return ret; + ret =3D iio_backend_num_lanes_set(st->back, 1); + break; + default: + return -EINVAL; + } + + if (ret) + return ret; + + return 0; +} + +static int ad7779_get_data_lines(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan) +{ + struct ad7779_state *st =3D iio_priv(indio_dev); + u8 temp; + int ret; + + ret =3D ad7779_spi_read(st, AD7779_REG_DOUT_FORMAT, &temp); + if (ret) + return ret; + + return FIELD_GET(AD7779_DOUT_FORMAT_MSK, temp); +} + static int ad7779_get_filter(struct iio_dev *indio_dev, struct iio_chan_spec const *chan) { @@ -630,12 +699,45 @@ static int ad7779_reset(struct iio_dev *indio_dev, st= ruct gpio_desc *reset_gpio) return ret; } =20 +static int ad7779_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct ad7779_state *st =3D iio_priv(indio_dev); + unsigned int c; + int ret; + + for (c =3D 0; c < AD7779_NUM_CHANNELS; c++) { + if (test_bit(c, scan_mask)) + ret =3D iio_backend_chan_enable(st->back, c); + else + ret =3D iio_backend_chan_disable(st->back, c); + if (ret) + return ret; + } + + return 0; +} + static const struct iio_info ad7779_info =3D { .read_raw =3D ad7779_read_raw, .write_raw =3D ad7779_write_raw, .debugfs_reg_access =3D &ad7779_reg_access, }; =20 +static const struct iio_info ad7779_info_data =3D { + .read_raw =3D ad7779_read_raw, + .write_raw =3D ad7779_write_raw, + .debugfs_reg_access =3D &ad7779_reg_access, + .update_scan_mode =3D &ad7779_update_scan_mode, +}; + +static const struct iio_enum ad7779_data_lines_enum =3D { + .items =3D ad7779_data_lines_modes, + .num_items =3D ARRAY_SIZE(ad7779_data_lines_modes), + .get =3D ad7779_get_data_lines, + .set =3D ad7779_set_data_lines, +}; + static const struct iio_enum ad7779_filter_enum =3D { .items =3D ad7779_filter_type, .num_items =3D ARRAY_SIZE(ad7779_filter_type), @@ -643,6 +745,13 @@ static const struct iio_enum ad7779_filter_enum =3D { .set =3D ad7779_set_filter, }; =20 +static const struct iio_chan_spec_ext_info ad7779_ext_info[] =3D { + IIO_ENUM("data_lines", IIO_SHARED_BY_ALL, &ad7779_data_lines_enum), + IIO_ENUM_AVAILABLE("data_lines", IIO_SHARED_BY_ALL, + &ad7779_data_lines_enum), + { } +}; + static const struct iio_chan_spec_ext_info ad7779_ext_filter[] =3D { IIO_ENUM("filter_type", IIO_SHARED_BY_ALL, &ad7779_filter_enum), IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_ALL, @@ -650,6 +759,16 @@ static const struct iio_chan_spec_ext_info ad7779_ext_= filter[] =3D { { } }; =20 +static const struct iio_chan_spec_ext_info ad7779_ext_info_filter[] =3D { + IIO_ENUM("data_lines", IIO_SHARED_BY_ALL, &ad7779_data_lines_enum), + IIO_ENUM_AVAILABLE("data_lines", IIO_SHARED_BY_ALL, + &ad7779_data_lines_enum), + IIO_ENUM("filter_type", IIO_SHARED_BY_ALL, &ad7779_filter_enum), + IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_ALL, + &ad7779_filter_enum), + { } +}; + #define AD777x_CHAN_S(index, _ext_info) \ { \ .type =3D IIO_VOLTAGE, \ @@ -669,11 +788,34 @@ static const struct iio_chan_spec_ext_info ad7779_ext= _filter[] =3D { }, \ } =20 +#define AD777X_CHAN(index, _ext_info) \ + { \ + .type =3D IIO_VOLTAGE, \ + .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .address =3D (index), \ + .indexed =3D 1, \ + .channel =3D (index), \ + .scan_index =3D (index), \ + .ext_info =3D (_ext_info), \ + .scan_type =3D { \ + .sign =3D 's', \ + .realbits =3D 24, \ + .storagebits =3D 32, \ + }, \ + } + #define AD777x_CHAN_NO_FILTER_S(index) \ AD777x_CHAN_S(index, NULL) =20 +#define AD777X_CHAN_NO_FILTER(index) \ + AD777X_CHAN(index, ad7779_ext_info) + #define AD777x_CHAN_FILTER_S(index) \ AD777x_CHAN_S(index, ad7779_ext_filter) + +#define AD777X_CHAN_FILTER(index) \ + AD777X_CHAN(index, ad7779_ext_info_filter) + static const struct iio_chan_spec ad7779_channels[] =3D { AD777x_CHAN_NO_FILTER_S(0), AD777x_CHAN_NO_FILTER_S(1), @@ -686,6 +828,17 @@ static const struct iio_chan_spec ad7779_channels[] = =3D { IIO_CHAN_SOFT_TIMESTAMP(8), }; =20 +static const struct iio_chan_spec ad7779_channels_data[] =3D { + AD777X_CHAN_NO_FILTER(0), + AD777X_CHAN_NO_FILTER(1), + AD777X_CHAN_NO_FILTER(2), + AD777X_CHAN_NO_FILTER(3), + AD777X_CHAN_NO_FILTER(4), + AD777X_CHAN_NO_FILTER(5), + AD777X_CHAN_NO_FILTER(6), + AD777X_CHAN_NO_FILTER(7), +}; + static const struct iio_chan_spec ad7779_channels_filter[] =3D { AD777x_CHAN_FILTER_S(0), AD777x_CHAN_FILTER_S(1), @@ -698,6 +851,17 @@ static const struct iio_chan_spec ad7779_channels_filt= er[] =3D { IIO_CHAN_SOFT_TIMESTAMP(8), }; =20 +static const struct iio_chan_spec ad7779_channels_filter_data[] =3D { + AD777X_CHAN_FILTER(0), + AD777X_CHAN_FILTER(1), + AD777X_CHAN_FILTER(2), + AD777X_CHAN_FILTER(3), + AD777X_CHAN_FILTER(4), + AD777X_CHAN_FILTER(5), + AD777X_CHAN_FILTER(6), + AD777X_CHAN_FILTER(7), +}; + static const struct iio_buffer_setup_ops ad7779_buffer_setup_ops =3D { .preenable =3D ad7779_buffer_preenable, .postdisable =3D ad7779_buffer_postdisable, @@ -752,6 +916,91 @@ static int ad7779_conf(struct ad7779_state *st, struct= gpio_desc *start_gpio) return 0; } =20 +static int ad7779_register_irq(struct ad7779_state *st, struct iio_dev *in= dio_dev) +{ + int ret; + struct device *dev =3D &st->spi->dev; + + indio_dev->info =3D &ad7779_info; + indio_dev->channels =3D st->chip_info->channels; + indio_dev->num_channels =3D ARRAY_SIZE(ad7779_channels); + + st->trig =3D devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, + iio_device_id(indio_dev)); + if (!st->trig) + return -ENOMEM; + + st->trig->ops =3D &ad7779_trigger_ops; + + iio_trigger_set_drvdata(st->trig, st); + + ret =3D devm_request_irq(dev, st->spi->irq, iio_trigger_generic_data_rdy_= poll, + IRQF_ONESHOT | IRQF_NO_AUTOEN, indio_dev->name, + st->trig); + if (ret) + return dev_err_probe(dev, ret, "request IRQ %d failed\n", + st->spi->irq); + + ret =3D devm_iio_trigger_register(dev, st->trig); + if (ret) + return ret; + + indio_dev->trig =3D iio_trigger_get(st->trig); + + init_completion(&st->completion); + + ret =3D devm_iio_triggered_buffer_setup(dev, indio_dev, + &iio_pollfunc_store_time, + &ad7779_trigger_handler, + &ad7779_buffer_setup_ops); + if (ret) + return ret; + + ret =3D ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT, + AD7779_DCLK_CLK_DIV_MSK, + FIELD_PREP(AD7779_DCLK_CLK_DIV_MSK, 7)); + if (ret) + return ret; + + return devm_iio_device_register(dev, indio_dev); +} + +static int ad7779_register_back(struct ad7779_state *st, struct iio_dev *i= ndio_dev) +{ + struct device *dev =3D &st->spi->dev; + int ret =3D -EINVAL; + + indio_dev->info =3D &ad7779_info_data; + + if (strcmp(st->chip_info->name, "ad7771") =3D=3D 0) { + indio_dev->channels =3D ad7779_channels_filter_data; + indio_dev->num_channels =3D ARRAY_SIZE(ad7779_channels_filter_data); + } else { + indio_dev->channels =3D ad7779_channels_data; + indio_dev->num_channels =3D ARRAY_SIZE(ad7779_channels_data); + } + + st->back =3D devm_iio_backend_get(dev, NULL); + if (IS_ERR(st->back)) { + dev_err_probe(dev, ret, "failed to get iio backend"); + return PTR_ERR(st->back); + } + + ret =3D devm_iio_backend_request_buffer(dev, st->back, indio_dev); + if (ret) + return ret; + + ret =3D devm_iio_backend_enable(dev, st->back); + if (ret) + return ret; + + ret =3D iio_backend_num_lanes_set(st->back, 4); + if (ret) + return ret; + + return devm_iio_device_register(dev, indio_dev); +} + static int ad7779_probe(struct spi_device *spi) { struct iio_dev *indio_dev; @@ -760,8 +1009,8 @@ static int ad7779_probe(struct spi_device *spi) struct device *dev =3D &spi->dev; int ret =3D -EINVAL; =20 - if (!spi->irq) - return dev_err_probe(dev, ret, "DRDY irq not present\n"); + if (!spi->irq && !device_property_present(dev, "io-backends")) + return dev_err_probe(dev, ret, "Either DRDY interrupt or io-backends pro= perty required\n"); =20 indio_dev =3D devm_iio_device_alloc(dev, sizeof(*st)); if (!indio_dev) @@ -804,49 +1053,12 @@ static int ad7779_probe(struct spi_device *spi) return ret; =20 indio_dev->name =3D st->chip_info->name; - indio_dev->info =3D &ad7779_info; indio_dev->modes =3D INDIO_DIRECT_MODE; - indio_dev->channels =3D st->chip_info->channels; - indio_dev->num_channels =3D ARRAY_SIZE(ad7779_channels); - - st->trig =3D devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, - iio_device_id(indio_dev)); - if (!st->trig) - return -ENOMEM; - - st->trig->ops =3D &ad7779_trigger_ops; - - iio_trigger_set_drvdata(st->trig, st); - - ret =3D devm_request_irq(dev, spi->irq, iio_trigger_generic_data_rdy_poll, - IRQF_ONESHOT | IRQF_NO_AUTOEN, indio_dev->name, - st->trig); - if (ret) - return dev_err_probe(dev, ret, "request IRQ %d failed\n", - st->spi->irq); - - ret =3D devm_iio_trigger_register(dev, st->trig); - if (ret) - return ret; - - indio_dev->trig =3D iio_trigger_get(st->trig); - - init_completion(&st->completion); - - ret =3D devm_iio_triggered_buffer_setup(dev, indio_dev, - &iio_pollfunc_store_time, - &ad7779_trigger_handler, - &ad7779_buffer_setup_ops); - if (ret) - return ret; =20 - ret =3D ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT, - AD7779_DCLK_CLK_DIV_MSK, - FIELD_PREP(AD7779_DCLK_CLK_DIV_MSK, 7)); - if (ret) - return ret; - - return devm_iio_device_register(dev, indio_dev); + if (spi->irq) + return ad7779_register_irq(st, indio_dev); + else + return ad7779_register_back(st, indio_dev); } =20 static int ad7779_suspend(struct device *dev) @@ -936,3 +1148,4 @@ module_spi_driver(ad7779_driver); MODULE_AUTHOR("Ramona Alexandra Nechita "); MODULE_DESCRIPTION("Analog Devices AD7779 ADC"); MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("IIO_BACKEND"); --=20 2.47.2