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Mon, 15 Jan 2024 05:54:22 -0800 (PST) From: Dumitru Ceclan To: Cc: linus.walleij@linaro.org, brgl@bgdev.pl, andy@kernel.org, linux-gpio@vger.kernel.org, Lars-Peter Clausen , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andy Shevchenko , Arnd Bergmann , ChiaEn Wu , Niklas Schnelle , =?utf-8?q?Leonard_G=C3=B6hrs?= , Mike Looijmans , Haibo Chen , Hugo Villeneuve , Ceclan Dumitru , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dumitru Ceclan Subject: [PATCH 1/2] dt-bindings: adc: ad7173: add support for additional models Date: Mon, 15 Jan 2024 15:53:04 +0200 Message-ID: <20240115135416.10595-2-mitrutzceclan@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240115135416.10595-1-mitrutzceclan@gmail.com> References: <20240115135416.10595-1-mitrutzceclan@gmail.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add support for: AD7172-2, AD7175-8, AD7177-2 Add hardware description of the AD771X family instead of "Bindings for" AD7172-4 does not feature an internal reference, check for ext-ref Signed-off-by: Dumitru Ceclan --- .../bindings/iio/adc/adi,ad7173.yaml | 50 +++++++++++++++++-- 1 file changed, 46 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml index 7c8caef76528..6d4b26e43144 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -11,19 +11,33 @@ maintainers: - Ceclan Dumitru description: | - Bindings for the Analog Devices AD717X ADC's. Datasheets for supported chips: + Analog Devices AD717X ADC's: + The AD717x family offer a complete integrated Sigma-Delta ADC solution which + can be used in high precision, low noise single channel applications + (Life Science measurements) or higher speed multiplexed applications + (Factory Automation PLC Input modules). The Sigma-Delta ADC is intended + primarily for measurement of signals close to DC but also delivers outstanding + performance with input bandwidths out to ~10kHz. + + Datasheets for supported chips: https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-4.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-8.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7177-2.pdf properties: compatible: enum: - adi,ad7172-2 + - adi,ad7172-4 - adi,ad7173-8 - adi,ad7175-2 + - adi,ad7175-8 - adi,ad7176-2 + - adi,ad7177-2 reg: maxItems: 1 @@ -89,8 +103,10 @@ patternProperties: refout-avss: REFOUT/AVSS (Internal reference) avdd : AVDD - External reference refin2 only available on ad7173-8. - If not specified, internal reference used. + External reference refin2 only available on ad7173-8 and ad7172-4. + Internal reference refout-avss not available on ad7172-4. + + If not specified, internal reference used (if available). $ref: /schemas/types.yaml#/definitions/string enum: - refin @@ -111,12 +127,15 @@ required: allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# + # Only ad7172-4 and ad7173-8 support refin2 - if: properties: compatible: not: contains: - const: adi,ad7173-8 + anyOf: + - const: adi,ad7172-4 + - const: adi,ad7173-8 then: properties: refin2-supply: false @@ -129,6 +148,29 @@ allOf: - refout-avss - avdd + # Model ad7172-4 does not support internal reference + # mandatory to have an external reference + - if: + properties: + compatible: + contains: + const: adi,ad7172-4 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + adi,reference-select: + enum: + - refin + - refin2 + - avdd + default: false + required: + - adi,reference-select + oneOf: + - required: [refin2-supply] + - required: [refin-supply] + unevaluatedProperties: false examples: From patchwork Mon Jan 15 13:53:05 2024 Content-Type: text/plain; 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Mon, 15 Jan 2024 05:54:24 -0800 (PST) From: Dumitru Ceclan To: Cc: linus.walleij@linaro.org, brgl@bgdev.pl, andy@kernel.org, linux-gpio@vger.kernel.org, Lars-Peter Clausen , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andy Shevchenko , Arnd Bergmann , ChiaEn Wu , Niklas Schnelle , =?utf-8?q?Leonard_G=C3=B6hrs?= , Mike Looijmans , Haibo Chen , Hugo Villeneuve , Ceclan Dumitru , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dumitru Ceclan Subject: [PATCH 2/2] iio: adc: ad7173: add support for additional models Date: Mon, 15 Jan 2024 15:53:05 +0200 Message-ID: <20240115135416.10595-3-mitrutzceclan@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240115135416.10595-1-mitrutzceclan@gmail.com> References: <20240115135416.10595-1-mitrutzceclan@gmail.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add support for Analog Devices AD7172-2, AD7175-8, AD7177-2 Signed-off-by: Dumitru Ceclan --- drivers/iio/adc/ad7173.c | 76 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 69 insertions(+), 7 deletions(-) diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c index 7a7e8262f189..8ca9871cc9cb 100644 --- a/drivers/iio/adc/ad7173.c +++ b/drivers/iio/adc/ad7173.c @@ -1,6 +1,10 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * AD7172-2/AD7173-8/AD7175-2/AD7176-2 SPI ADC driver + * AD717X family SPI ADC driver + * + * Suported devices: + * AD7172-2 AD7172-4 AD7173-8 AD7175-2 AD7175-8 AD7176-2 AD7177-2 + * * Copyright (C) 2015, 2023 Analog Devices, Inc. */ @@ -59,10 +63,13 @@ #define AD7173_AIN_TEMP_POS 17 #define AD7173_AIN_TEMP_NEG 18 -#define AD7172_ID 0x00d0 +#define AD7172_2_ID 0x00d0 +#define AD7172_4_ID 0x2050 #define AD7173_ID 0x30d0 -#define AD7175_ID 0x0cd0 +#define AD7175_2_ID 0x0cd0 +#define AD7175_8_ID 0x3cd0 #define AD7176_ID 0x0c90 +#define AD7177_ID 0x4fd0 #define AD7173_ID_MASK GENMASK(15, 4) #define AD7173_ADC_MODE_REF_EN BIT(15) @@ -104,15 +111,19 @@ #define AD7173_SETUP_REF_SEL_EXT_REF 0x0 #define AD7173_VOLTAGE_INT_REF_uV 2500000 #define AD7173_TEMP_SENSIIVITY_uV_per_C 477 +#define AD7177_ODR_START_VALUE 0x07 #define AD7173_FILTER_ODR0_MASK GENMASK(5, 0) #define AD7173_MAX_CONFIGS 8 enum ad7173_ids { ID_AD7172_2, + ID_AD7172_4, ID_AD7173_8, ID_AD7175_2, + ID_AD7175_8, ID_AD7176_2, + ID_AD7177_2, }; struct ad7173_device_info { @@ -182,7 +193,7 @@ static const unsigned int ad7175_sinc5_data_rates[] = { static const struct ad7173_device_info ad7173_device_info[] = { [ID_AD7172_2] = { .name = "ad7172-2", - .id = AD7172_ID, + .id = AD7172_2_ID, .num_inputs = 5, .num_channels = 4, .num_configs = 4, @@ -192,6 +203,17 @@ static const struct ad7173_device_info ad7173_device_info[] = { .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }, + [ID_AD7172_4] = { + .id = AD7172_4_ID, + .num_inputs = 9, + .num_channels = 8, + .num_configs = 8, + .num_gpios = 4, + .has_temp = false, + .clock = 2 * HZ_PER_MHZ, + .sinc5_data_rates = ad7173_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), + }, [ID_AD7173_8] = { .name = "ad7173-8", .id = AD7173_ID, @@ -206,7 +228,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { }, [ID_AD7175_2] = { .name = "ad7175-2", - .id = AD7175_ID, + .id = AD7175_2_ID, .num_inputs = 5, .num_channels = 4, .num_configs = 4, @@ -216,6 +238,17 @@ static const struct ad7173_device_info ad7173_device_info[] = { .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), }, + [ID_AD7175_8] = { + .id = AD7175_8_ID, + .num_inputs = 17, + .num_channels = 16, + .num_configs = 8, + .num_gpios = 4, + .has_temp = true, + .clock = 16 * HZ_PER_MHZ, + .sinc5_data_rates = ad7175_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), + }, [ID_AD7176_2] = { .name = "ad7176-2", .id = AD7176_ID, @@ -228,6 +261,17 @@ static const struct ad7173_device_info ad7173_device_info[] = { .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), }, + [ID_AD7177_2] = { + .id = AD7177_ID, + .num_inputs = 5, + .num_channels = 4, + .num_configs = 4, + .num_gpios = 2, + .has_temp = true, + .clock = 16 * HZ_PER_MHZ, + .sinc5_data_rates = ad7175_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), + }, }; static const char *const ad7173_ref_sel_str[] = { @@ -636,7 +680,10 @@ static int ad7173_write_raw(struct iio_dev *indio_dev, switch (info) { case IIO_CHAN_INFO_SAMP_FREQ: freq = val * MILLI + val2 / MILLI; - for (i = 0; i < st->info->num_sinc5_data_rates - 1; i++) + //AD7177-2 has the filter values [0-6] marked as reserved + // datasheet page 58 + i = (st->info->id == AD7177_ID) ? AD7177_ODR_START_VALUE : 0; + for (; i < st->info->num_sinc5_data_rates - 1; i++) if (freq >= st->info->sinc5_data_rates[i]) break; @@ -844,8 +891,14 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev) else ref_sel = ret; + if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF && + st->info->id == AD7172_2_ID){ + fwnode_handle_put(child); + return dev_err_probe(dev, -EINVAL, "Internal reference is not available on ad7172-2\n"); + } + if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 && - st->info->id != AD7173_ID) { + st->info->id != AD7173_ID && st->info->id != AD7172_2_ID) { fwnode_handle_put(child); return dev_err_probe(dev, -EINVAL, "External reference 2 is only available on ad7173-8\n"); } @@ -939,21 +992,30 @@ static int ad7173_probe(struct spi_device *spi) static const struct of_device_id ad7173_of_match[] = { { .compatible = "adi,ad7172-2", .data = &ad7173_device_info[ID_AD7172_2]}, + { .compatible = "adi,ad7172-4", + .data = &ad7173_device_info[ID_AD7172_4]}, { .compatible = "adi,ad7173-8", .data = &ad7173_device_info[ID_AD7173_8]}, { .compatible = "adi,ad7175-2", .data = &ad7173_device_info[ID_AD7175_2]}, + { .compatible = "adi,ad7175-8", + .data = &ad7173_device_info[ID_AD7175_8]}, { .compatible = "adi,ad7176-2", .data = &ad7173_device_info[ID_AD7176_2]}, + { .compatible = "adi,ad7177-2", + .data = &ad7173_device_info[ID_AD7177_2]}, { } }; MODULE_DEVICE_TABLE(of, ad7173_of_match); static const struct spi_device_id ad7173_id_table[] = { { "ad7172-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_2]}, + { "ad7172-4", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_4] }, { "ad7173-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7173_8]}, { "ad7175-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_2]}, + { "ad7175-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_8]}, { "ad7176-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7176_2]}, + { "ad7177-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7177_2]}, { } }; MODULE_DEVICE_TABLE(spi, ad7173_id_table);