From patchwork Mon Dec 2 10:09:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guillaume Ranquet X-Patchwork-Id: 13890247 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC4071FC10E for ; Mon, 2 Dec 2024 10:14:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733134472; cv=none; b=PY70xZ7Yo/Io7eGtWVAjkDFHBWHD5NeiNnnCdgt+9VEIOnAJwmbhCCPwhllDyUgmlkF2uo70YX6P0613xdCoKGVCtgR1ZOmMKAUxflwMxPb7KtaAYKdldcOz0BEtk33vWMxs44r0f9W0+JF45ka1CMtH77TFGkX3EwR0ehcPku8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733134472; c=relaxed/simple; bh=lxtQNPG7ecK6Iv4xprjHSTDP5kz4+CAaG6h4MbYJZwg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=tJqjSUBSHcQMA0IYNn0JX5l094HvFoDeGXXsz8z+OCRSqQfgB0RW5ozAsW3x6v8Xq2O3BnHhq2hwNnHTw3pfQ9ugfzxY+8zMkJwy+035XZ/uye5b6xRbqyukY8KrlgvDlOFA+u2abYVja3nFOzkkhqRfo68sIIgrqc7piBnbcLk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=zYuWdesn; arc=none smtp.client-ip=209.85.128.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="zYuWdesn" Received: by mail-wm1-f42.google.com with SMTP id 5b1f17b1804b1-434a14d6bf4so36402115e9.1 for ; Mon, 02 Dec 2024 02:14:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1733134468; x=1733739268; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=C3sHijHsObcmuC5+B0nCO3Vf+v46fobTZzfGbKsmzqY=; b=zYuWdesn9Lcc9QTDd3FwO3o5mYT9tzQpJUMk3xEsvQFZIyQ4Go0OU1lTzeqQsj+GfJ rnoaYgJRVC9Vfe48ZtypMVps3K5T0Hvba1s9Fsnr3YjDzdql6og1HhY6iUHAR9vXyMoj zlr1PnxDaQODaUu7vHEWpjRFOdI8spP621aV+fn4NV8piqEB2ysJPAES65OrjgxM2DiP ta6cD7fhg9B+6iRh5ncz4Xa12/iz4qlJ9IvnZY+ZBTOa3/bK8B/xWrXmohwZlEJVdCgI ShvP4vhJgHkIZa1EzN9c/3LfSVooqO55Cn8Xn2dyZVCnxkuv8A2r2eaCtKiej4BxpLOh RiHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733134468; x=1733739268; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=C3sHijHsObcmuC5+B0nCO3Vf+v46fobTZzfGbKsmzqY=; b=JG6a5hueSheMbGojAemMCDB6vPqJzBbN2xwVwJ+CAnEAlDTpnrQNXCsazWY8iLMfEw 7rXaMvWPpScmWuFlX8CcutBLZmMOWEzfO5puzvDbxiiBPD/IEQs9LIfCHC+ziuC5xkJf RwDfg4uugte/mQNg9dY2ku/oNMeDn6deuCP8O5YoqxBzxZktL5gVaSE62SUFA0kfWvJk Y5NOWBLzVfbppV9ewD/WOSCICqFaBl/Sgh0oJD4kL8el4t+qL2qWGY13qL8HvvYhGoKz 9B6za4yxAUl22/J/jCMD4gypS1MmTDK9Iy240BGABPgx+F2PTZx9v4vVmIDxTyX83aSN Cpaw== X-Gm-Message-State: AOJu0YwK9v/TrapR+KRAJZ9NrcP7/0PCCdZiC3sQmgnU49wYV58Abcef cOs2cRvN8IrNsk2ao/0tLFBr490ZvW/qE4NxFzWoIOEH19JVE9ixcFwMFQy0NuA= X-Gm-Gg: ASbGncssRf5MaGxhru/7kVMBy+K1WCXgsvKl8Udfkp1umz5EaAjR5EPY3Nge8xS1fzJ kgNSXmgftWK01+d2XrwDyU/HX6l+gatR7ppdVYFvEJC1KA66tRmxndO1LLkGqdCVWpYtbqpP2jf xxF2TKCE/fKI7sOQ41gD/hWz6I2bhq4TRTOvbiyzAyy/SEo3ltt1EuXJd64tDkKlbcyOoRYyNm6 Oqw8aXjdVZwdaTcdjBmrltbwwhKKEk65pzft7pgfgCQKA6Opy3O2aZ3jiq5eGPDVWvgrnzi1Cgm NmxD0s5hjG40Ih1EKfoa X-Google-Smtp-Source: AGHT+IFjx/yJJybfJqzTJyGbOn2E5AZSxv5el1mA0qTMGPGYHc4xLYJUUBB5kp/oNkqyJxkeV2587w== X-Received: by 2002:a05:600c:4e8b:b0:431:93d8:e1a1 with SMTP id 5b1f17b1804b1-434a9df1f34mr189694025e9.27.1733134467826; Mon, 02 Dec 2024 02:14:27 -0800 (PST) Received: from [127.0.0.1] (alille-653-1-300-114.w90-1.abo.wanadoo.fr. [90.1.180.114]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434aa7e5e59sm181138325e9.44.2024.12.02.02.14.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2024 02:14:27 -0800 (PST) From: Guillaume Ranquet Date: Mon, 02 Dec 2024 11:09:52 +0100 Subject: [PATCH v3 1/2] iio: adc: ad7173: add calibration support Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241202-ad411x_calibration-v3-1-beb6aeec39e2@baylibre.com> References: <20241202-ad411x_calibration-v3-0-beb6aeec39e2@baylibre.com> In-Reply-To: <20241202-ad411x_calibration-v3-0-beb6aeec39e2@baylibre.com> To: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Guillaume Ranquet X-Mailer: b4 0.15-dev The ad7173 family of chips has up to four calibration modes. Internal zero scale: removes ADC core offset errors. Internal full scale: removes ADC core gain errors. System zero scale: reduces offset error to the order of channel noise. System full scale: reduces gain error to the order of channel noise. All voltage channels will undergo an internal zero/full scale calibration at bootup. System zero/full scale can be done after bootup using the newly created iio interface 'sys_calibration' and 'sys_calibration_mode' Signed-off-by: Guillaume Ranquet --- drivers/iio/adc/ad7173.c | 116 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c index a0fca16c3be07534547a5b914d525d05f7425340..5e711b9c80840547bcfa2ad8f5fc8e15c1acc5d2 100644 --- a/drivers/iio/adc/ad7173.c +++ b/drivers/iio/adc/ad7173.c @@ -150,6 +150,11 @@ #define AD7173_FILTER_ODR0_MASK GENMASK(5, 0) #define AD7173_MAX_CONFIGS 8 +#define AD7173_MODE_CAL_INT_ZERO 0x4 /* Internal Zero-Scale Calibration */ +#define AD7173_MODE_CAL_INT_FULL 0x5 /* Internal Full-Scale Calibration */ +#define AD7173_MODE_CAL_SYS_ZERO 0x6 /* System Zero-Scale Calibration */ +#define AD7173_MODE_CAL_SYS_FULL 0x7 /* System Full-Scale Calibration */ + struct ad7173_device_info { const unsigned int *sinc5_data_rates; unsigned int num_sinc5_data_rates; @@ -175,6 +180,7 @@ struct ad7173_device_info { bool has_input_buf; bool has_int_ref; bool has_ref2; + bool has_internal_fs_calibration; bool higher_gpio_bits; u8 num_gpios; }; @@ -196,6 +202,7 @@ struct ad7173_channel { unsigned int chan_reg; unsigned int ain; struct ad7173_channel_config cfg; + u8 syscalib_mode; }; struct ad7173_state { @@ -272,6 +279,7 @@ static const struct ad7173_device_info ad4111_device_info = { .has_input_buf = true, .has_current_inputs = true, .has_int_ref = true, + .has_internal_fs_calibration = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), @@ -291,6 +299,7 @@ static const struct ad7173_device_info ad4112_device_info = { .has_input_buf = true, .has_current_inputs = true, .has_int_ref = true, + .has_internal_fs_calibration = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), @@ -326,6 +335,7 @@ static const struct ad7173_device_info ad4114_device_info = { .has_temp = true, .has_input_buf = true, .has_int_ref = true, + .has_internal_fs_calibration = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), @@ -343,6 +353,7 @@ static const struct ad7173_device_info ad4115_device_info = { .has_temp = true, .has_input_buf = true, .has_int_ref = true, + .has_internal_fs_calibration = true, .clock = 8 * HZ_PER_MHZ, .sinc5_data_rates = ad4115_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad4115_sinc5_data_rates), @@ -360,6 +371,7 @@ static const struct ad7173_device_info ad4116_device_info = { .has_temp = true, .has_input_buf = true, .has_int_ref = true, + .has_internal_fs_calibration = true, .clock = 4 * HZ_PER_MHZ, .sinc5_data_rates = ad4116_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad4116_sinc5_data_rates), @@ -505,6 +517,105 @@ static const struct regmap_config ad7173_regmap_config = { .read_flag_mask = BIT(6), }; +enum { + AD7173_SYSCALIB_ZERO_SCALE, + AD7173_SYSCALIB_FULL_SCALE, +}; + +static const char * const ad7173_syscalib_modes[] = { + [AD7173_SYSCALIB_ZERO_SCALE] = "zero_scale", + [AD7173_SYSCALIB_FULL_SCALE] = "full_scale", +}; + +static int ad7173_set_syscalib_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + unsigned int mode) +{ + struct ad7173_state *st = iio_priv(indio_dev); + + st->channels[chan->channel].syscalib_mode = mode; + + return 0; +} + +static int ad7173_get_syscalib_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad7173_state *st = iio_priv(indio_dev); + + return st->channels[chan->channel].syscalib_mode; +} + +static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct ad7173_state *st = iio_priv(indio_dev); + bool sys_calib; + int ret, mode; + + ret = kstrtobool(buf, &sys_calib); + if (ret) + return ret; + + mode = st->channels[chan->channel].syscalib_mode; + if (sys_calib) { + if (mode == AD7173_SYSCALIB_ZERO_SCALE) + ret = ad_sd_calibrate(&st->sd, AD7173_MODE_CAL_SYS_ZERO, + chan->address); + else + ret = ad_sd_calibrate(&st->sd, AD7173_MODE_CAL_SYS_FULL, + chan->address); + } + + return ret ? : len; +} + +static const struct iio_enum ad7173_syscalib_mode_enum = { + .items = ad7173_syscalib_modes, + .num_items = ARRAY_SIZE(ad7173_syscalib_modes), + .set = ad7173_set_syscalib_mode, + .get = ad7173_get_syscalib_mode +}; + +static const struct iio_chan_spec_ext_info ad7173_calibsys_ext_info[] = { + { + .name = "sys_calibration", + .write = ad7173_write_syscalib, + .shared = IIO_SEPARATE, + }, + IIO_ENUM("sys_calibration_mode", IIO_SEPARATE, + &ad7173_syscalib_mode_enum), + IIO_ENUM_AVAILABLE("sys_calibration_mode", IIO_SHARED_BY_TYPE, + &ad7173_syscalib_mode_enum), + { } +}; + +static int ad7173_calibrate_all(struct ad7173_state *st, struct iio_dev *indio_dev) +{ + int ret; + int i; + + for (i = 0; i < st->num_channels; i++) { + if (indio_dev->channels[i].type != IIO_VOLTAGE) + continue; + + ret = ad_sd_calibrate(&st->sd, AD7173_MODE_CAL_INT_ZERO, st->channels[i].ain); + if (ret < 0) + return ret; + + if (st->info->has_internal_fs_calibration) { + ret = ad_sd_calibrate(&st->sd, AD7173_MODE_CAL_INT_FULL, + st->channels[i].ain); + if (ret < 0) + return ret; + } + } + + return 0; +} + static int ad7173_mask_xlate(struct gpio_regmap *gpio, unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask) @@ -801,6 +912,10 @@ static int ad7173_setup(struct iio_dev *indio_dev) if (!st->config_cnts) return -ENOMEM; + ret = ad7173_calibrate_all(st, indio_dev); + if (ret) + return ret; + /* All channels are enabled by default after a reset */ return ad7173_disable_all(&st->sd); } @@ -1023,6 +1138,7 @@ static const struct iio_chan_spec ad7173_channel_template = { .storagebits = 32, .endianness = IIO_BE, }, + .ext_info = ad7173_calibsys_ext_info, }; static const struct iio_chan_spec ad7173_temp_iio_channel_template = { From patchwork Mon Dec 2 10:09:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guillaume Ranquet X-Patchwork-Id: 13890249 Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9CC071FC117 for ; Mon, 2 Dec 2024 10:14:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733134473; cv=none; b=PfvUSpYTaLCIt/Fzp6GedS0WXy7u5IaSoeoDxAdnmlSRXefyRR4ilvEZIDxl18Cs5q7JUt8q+jTqhXBR9SLKH4SOmY0hAKLghLCE6/7JXikrDq3iFu5ihzdi+7QAERwp+g/a4JTdNjP3gDJ6TBK1E5IYj5jA0TMvAvO3aJgbs8s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733134473; c=relaxed/simple; bh=gUUTuRBqFh6i1HpXlE6OB83LoDsqVr3hA6U4CkK7QvM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=b+Ng1pToicByfMJcVPNhg5Da12toZ24GglfCUG+aeQesG7Ylowc0Tm/duzTEpnlD+q2aKpJAGbataWNIMHIGRSCmpBeWxicOAkCRl8yHY3a/pG3liHGN2s6E9G9MtzQZ9l4TBBibiTuTxTTXCGdip9DE8bcKP/g4XyLsXhV/M9c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=o2qHcMqc; arc=none smtp.client-ip=209.85.128.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="o2qHcMqc" Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-434aafd68e9so33984025e9.0 for ; Mon, 02 Dec 2024 02:14:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1733134469; x=1733739269; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=UShwHa1ujiu/7K4Zm9WNENd64U85UqA/kqLEIbdrEk4=; b=o2qHcMqcYMvouPrItrEazojopPjPbTAevmFGOHISVHdHtCPtB1icC70Kx+hDkpXfHn o7UKuRLklBY6KukcRYWQ/1m7KVNInrsSzk1BqiRKTMmYe5sKQMoc69fH8TD7ZoIEugOx +CEA+XjT4OrUQrQDRH9M0sdMFVfjsIc8LlO3igSXCFC99O1SYMroRwF31Y+6krqfd9h+ e8/qgq7K44DETVg+2F0Ydy/R3cE29Dr02sIoaWQhWjWYThrEo21205keyLZC9UOxmxLL tX5sGcrIMrSnx6MrhEH2X2xDgC4G0MYXWzmtGcasek2RteplzJJMZM8aVs9V+dqEbE5g F+Kg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733134469; x=1733739269; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UShwHa1ujiu/7K4Zm9WNENd64U85UqA/kqLEIbdrEk4=; b=YaUuOeNrwPU4yE74h3zuH0wgNvc+aH6HlPg3oRUrKhIMJUG0cHBOfarARCPmVj9SZn 92cGPuuDXjl7D9+ZYT3r0bBNV9oyYqurkZ6M0eAjZfmPlV7ehUqEanfTT2ee3NSKyldG TMKNBUMn3fowFAfa5YkVIWgPQJ0SvmyUr79M54JbZalF34QmFld60IMeCC0moNPtc0r7 m90TBPUe3/xcPVafVVnZWY6cxuAJ7bMwfLobTzMZmsju/1Y+GPNbOzAENa626lbeRkXX ee97DK5Al1MhtZ76+u2kPdh0AdvyatOVwdfLg3mxfKMF1vQ+O+NkMqs5buxcev5O/6Rx +nwQ== X-Gm-Message-State: AOJu0Yzs/72OYkEekzFkYbARTaYNZNKME8NIVLemyWRTTmJuka2zOUUu FvRHKdthIqUyV/APJQIGuetZ2tFHnH23LV+m0VxFC6eTuWsQsCjfHFsANCFXXFE= X-Gm-Gg: ASbGncs3hIg3gcHoRCxjrFspGED4hF3y0PiezSaVR4QzAwwJNSDDAL6uYyqgAPTmPme Q2eajPtmWxiRO4Ycu6vxHNC6H9LkEwdbh5jyJWvtVvA/JOGJG8pNllq47W0BJ5LLFWF4yRegTyW MK5F3JyDNNXsqE+Nya0amkDRb8fwrkzvW7wVjLLbjXct+zAmudob0c6CdVBfLrABy3QKN9LwgEs JP7JudulhbD8mS1VllA1BKKurkC/CY2tEzXiD2RBgR9IqMMr8q6ezU0QD/KzAybeAz2X5xoY41S V0ygOIlZJiVEXQiHq2eh X-Google-Smtp-Source: AGHT+IG99R6RmHPizsPQYmPL6FxUEvS09nH38X0UgGDDBVNTdkRxoIeaJaNsFnED1YOxtAcH9liGCg== X-Received: by 2002:a05:600c:314d:b0:434:a75b:5f6c with SMTP id 5b1f17b1804b1-434a9dbea45mr229123865e9.10.1733134468819; Mon, 02 Dec 2024 02:14:28 -0800 (PST) Received: from [127.0.0.1] (alille-653-1-300-114.w90-1.abo.wanadoo.fr. [90.1.180.114]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434aa7e5e59sm181138325e9.44.2024.12.02.02.14.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2024 02:14:28 -0800 (PST) From: Guillaume Ranquet Date: Mon, 02 Dec 2024 11:09:53 +0100 Subject: [PATCH v3 2/2] iio: adc: ad-sigma-delta: Document ABI for sigma delta adc Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241202-ad411x_calibration-v3-2-beb6aeec39e2@baylibre.com> References: <20241202-ad411x_calibration-v3-0-beb6aeec39e2@baylibre.com> In-Reply-To: <20241202-ad411x_calibration-v3-0-beb6aeec39e2@baylibre.com> To: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Guillaume Ranquet X-Mailer: b4 0.15-dev Add common calibration nodes for sigma delta adc. Signed-off-by: Guillaume Ranquet --- .../ABI/testing/sysfs-bus-iio-adc-ad-sigma-delta | 23 +++++++++++++++++++++ Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 | 24 ---------------------- 2 files changed, 23 insertions(+), 24 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad-sigma-delta b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad-sigma-delta new file mode 100644 index 0000000000000000000000000000000000000000..a5a8a579f4f34d5982d4d7d4545a0bc246505910 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad-sigma-delta @@ -0,0 +1,23 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_sys_calibration +KernelVersion: 5.5 +Contact: linux-iio@vger.kernel.org +Description: + This attribute, if available, initiates the system calibration procedure. This is done on a + single channel at a time. Write '1' to start the calibration. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_sys_calibration_mode_available +KernelVersion: 5.5 +Contact: linux-iio@vger.kernel.org +Description: + This attribute, if available, returns a list with the possible calibration modes. + There are two available options: + "zero_scale" - calibrate to zero scale + "full_scale" - calibrate to full scale + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_sys_calibration_mode +KernelVersion: 5.5 +Contact: linux-iio@vger.kernel.org +Description: + This attribute, if available, sets up the calibration mode used in the system calibration + procedure. Reading returns the current calibration mode. + Writing sets the system calibration mode. diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 index f8315202c8f0df2bd4b7216f5cf8d3c2780fcf3f..28be1cabf1124ac7593392e17e4759ddfac829e8 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192 @@ -19,33 +19,9 @@ Description: the bridge can be disconnected (when it is not being used using the bridge_switch_en attribute. -What: /sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration -KernelVersion: -Contact: linux-iio@vger.kernel.org -Description: - Initiates the system calibration procedure. This is done on a - single channel at a time. Write '1' to start the calibration. - What: /sys/bus/iio/devices/iio:deviceX/in_voltage2-voltage2_shorted_raw KernelVersion: Contact: linux-iio@vger.kernel.org Description: Measure voltage from AIN2 pin connected to AIN(+) and AIN(-) shorted. - -What: /sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration_mode_available -KernelVersion: -Contact: linux-iio@vger.kernel.org -Description: - Reading returns a list with the possible calibration modes. - There are two available options: - "zero_scale" - calibrate to zero scale - "full_scale" - calibrate to full scale - -What: /sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration_mode -KernelVersion: -Contact: linux-iio@vger.kernel.org -Description: - Sets up the calibration mode used in the system calibration - procedure. Reading returns the current calibration mode. - Writing sets the system calibration mode.