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([2405:201:2011:e829:fadd:33b:8fc3:b2c8]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36a7265a001sm9302388a91.7.2026.05.25.03.52.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 May 2026 03:52:07 -0700 (PDT) From: Piyush Patle To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jic23@kernel.org, ak@it-klinger.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andy@kernel.org, nuno.sa@analog.com, dlechner@baylibre.com Subject: [PATCH v10 06/11] iio: adc: hx711: introduce hx711_chip_info structure Date: Mon, 25 May 2026 16:21:22 +0530 Message-ID: <20260525105127.180156-7-piyushpatle228@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260525105127.180156-1-piyushpatle228@gmail.com> References: <20260525105127.180156-1-piyushpatle228@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a per-variant static configuration structure and populate the IIO device fields from it at probe time. This is a preparatory change for adding support for more HX711-compatible hardware variants without duplicating the probe-time setup. No functional change for existing HX711 users. Signed-off-by: Piyush Patle Reviewed-by: Andy Shevchenko --- drivers/iio/adc/hx711.c | 41 ++++++++++++++++++++++++++++++++++++----- 1 file changed, 36 insertions(+), 5 deletions(-) diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c index 86d2a70dd3de..10ccc69f209b 100644 --- a/drivers/iio/adc/hx711.c +++ b/drivers/iio/adc/hx711.c @@ -4,6 +4,8 @@ * * Copyright (c) 2016 Andreas Klinger */ +#include +#include #include #include #include @@ -74,6 +76,20 @@ static int hx711_get_scale_to_gain(const int *gain_scale, int scale) return -EINVAL; } +/** + * struct hx711_chip_info - per-variant static configuration + * @name: IIO device name + * @channels: channel specification array + * @num_channels: number of entries in @channels + * @iio_info: IIO info ops for this variant + */ +struct hx711_chip_info { + const char *name; + const struct iio_chan_spec *channels __counted_by_ptr(num_channels); + unsigned int num_channels; + const struct iio_info *iio_info; +}; + struct hx711_data { struct device *dev; struct gpio_desc *gpiod_pd_sck; @@ -81,6 +97,7 @@ struct hx711_data { int gain_set; /* gain set on device */ int gain_chan_a; /* gain for channel A */ int gain_scale[HX711_GAIN_MAX]; + const struct hx711_chip_info *chip_info; struct mutex lock; /* * triggered buffer @@ -456,8 +473,16 @@ static const struct iio_chan_spec hx711_chan_spec[] = { IIO_CHAN_SOFT_TIMESTAMP(2), }; +static const struct hx711_chip_info hx711_chip = { + .name = "hx711", + .channels = hx711_chan_spec, + .iio_info = &hx711_iio_info, + .num_channels = ARRAY_SIZE(hx711_chan_spec), +}; + static int hx711_probe(struct platform_device *pdev) { + const struct hx711_chip_info *chip_info; struct device *dev = &pdev->dev; struct hx711_data *hx711_data; struct iio_dev *indio_dev; @@ -473,6 +498,12 @@ static int hx711_probe(struct platform_device *pdev) mutex_init(&hx711_data->lock); + chip_info = device_get_match_data(dev); + if (!chip_info) + return dev_err_probe(dev, -ENODEV, "missing driver data\n"); + + hx711_data->chip_info = chip_info; + /* * PD_SCK stands for power down and serial clock input of HX711 * in the driver it is an output @@ -534,11 +565,11 @@ static int hx711_probe(struct platform_device *pdev) hx711_data->data_ready_delay_ns = 1000000000 / hx711_data->clock_frequency; - indio_dev->name = "hx711"; - indio_dev->info = &hx711_iio_info; + indio_dev->name = chip_info->name; + indio_dev->info = chip_info->iio_info; indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = hx711_chan_spec; - indio_dev->num_channels = ARRAY_SIZE(hx711_chan_spec); + indio_dev->channels = chip_info->channels; + indio_dev->num_channels = chip_info->num_channels; ret = devm_iio_triggered_buffer_setup(dev, indio_dev, iio_pollfunc_store_time, @@ -555,7 +586,7 @@ static int hx711_probe(struct platform_device *pdev) } static const struct of_device_id of_hx711_match[] = { - { .compatible = "avia,hx711", }, + { .compatible = "avia,hx711", .data = &hx711_chip }, { } }; -- 2.43.0