From patchwork Tue Nov 21 10:20:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nuno Sa via B4 Relay X-Patchwork-Id: 745849 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1C8343D967; Tue, 21 Nov 2023 10:17:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="j+KXFBmO" Received: by smtp.kernel.org (Postfix) with ESMTPS id 89361C433C9; Tue, 21 Nov 2023 10:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700561839; bh=aNABuSX/iu/FZhYqcM7nGl46V+DTa8I77sLNnNUUCbM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=j+KXFBmO0VLW/kk+YkqR74u1RvNjaYcbY30YaQTpU7OitaBTQU5F+iyZR7vLFbdek ZiqZ8kyMEHKkjJxeTYQr5i6o2wql53rRHBziJwLHJiKAsQPcOJaqnSPjZesXe9ujlx aFFHHCUgzqQTiZwQBToBmJneVvQimCOvy/TDEwNEl8ceKDE7yQQArh5WcToNF/+JeC G9PA2b5Mr5u0wNorE1zWPm2pl0YSYBgBMx4fpOZ2AQ38bHVCW/pR01FMh9N2MAVszy khKa7ZdMmAny34bXlOQyWCYkoNN49MNbV5wC/+fV8/xJCCXbCNq96HciUKZYlv9VfT FKpdzv/p5gnzQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76438C61D93; Tue, 21 Nov 2023 10:17:19 +0000 (UTC) From: Nuno Sa via B4 Relay Date: Tue, 21 Nov 2023 11:20:20 +0100 Subject: [PATCH 07/12] iio: adc: ad9467: fix scale setting Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231121-dev-iio-backend-v1-7-6a3d542eba35@analog.com> References: <20231121-dev-iio-backend-v1-0-6a3d542eba35@analog.com> In-Reply-To: <20231121-dev-iio-backend-v1-0-6a3d542eba35@analog.com> To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org Cc: Olivier MOYSAN , Greg Kroah-Hartman , "Rafael J. Wysocki" , Rob Herring , Frank Rowand , Jonathan Cameron , Lars-Peter Clausen , Michael Hennerich , Nuno Sa X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=ed25519-sha256; t=1700562016; l=8213; i=nuno.sa@analog.com; s=20231116; h=from:subject:message-id; bh=5RjYNT6FmhQuBx41nfBmHPCdi4pZgV0vQHZroLMTopw=; b=oVQFvVd9qVYjXGGsy9vaJzyQsWgsY6P5EpBdM7AlD7XfsL8GrcP587ImNrjSzhEGZHL9JtUEJ ed+R8jlUjXXCZ2IFQOYQs9Cv6bWGIrsd88hj5kuqyDRXIoHBuOnCt/d X-Developer-Key: i=nuno.sa@analog.com; a=ed25519; pk=3NQwYA013OUYZsmDFBf8rmyyr5iQlxV/9H4/Df83o1E= X-Endpoint-Received: by B4 Relay for nuno.sa@analog.com/20231116 with auth_id=100 X-Original-From: Nuno Sa Reply-To: From: Nuno Sa When reading in_voltage_scale we can get something like: root@analog:/sys/bus/iio/devices/iio:device2# cat in_voltage_scale 0.038146 However, when reading the available options: root@analog:/sys/bus/iio/devices/iio:device2# cat in_voltage_scale_available 2000.000000 2100.000006 2200.000007 2300.000008 2400.000009 2500.000010 which does not make sense. Moreover, when trying to set a new scale we get an error because there's no call to __ad9467_get_scale() to give us values as given when reading in_voltage_scale. Fix it by computing the available scales during probe and properly pass the list when .read_available() is called. While at it, change to use .read_available() from iio_info. Also note that to properly fix this, adi-axi-adc.c has to be changed accordingly. Fixes: ad6797120238 ("iio: adc: ad9467: add support AD9467 ADC") Signed-off-by: Nuno Sa --- drivers/iio/adc/ad9467.c | 47 +++++++++++++++++++++++ drivers/iio/adc/adi-axi-adc.c | 74 ++++++++----------------------------- include/linux/iio/adc/adi-axi-adc.h | 4 ++ 3 files changed, 66 insertions(+), 59 deletions(-) diff --git a/drivers/iio/adc/ad9467.c b/drivers/iio/adc/ad9467.c index 91821dee03b7..df4c21248226 100644 --- a/drivers/iio/adc/ad9467.c +++ b/drivers/iio/adc/ad9467.c @@ -120,6 +120,7 @@ struct ad9467_state { struct spi_device *spi; struct clk *clk; unsigned int output_mode; + unsigned int (*scales)[2]; struct gpio_desc *pwrdown_gpio; /* protect against concurrent accesses to the device */ @@ -216,6 +217,7 @@ static void __ad9467_get_scale(struct adi_axi_adc_conv *conv, int index, .channel = _chan, \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE), \ .scan_index = _si, \ .scan_type = { \ .sign = _sign, \ @@ -369,6 +371,26 @@ static int ad9467_write_raw(struct adi_axi_adc_conv *conv, } } +static int ad9467_read_avail(struct adi_axi_adc_conv *conv, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + const struct adi_axi_adc_chip_info *info = conv->chip_info; + struct ad9467_state *st = adi_axi_adc_conv_priv(conv); + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + *vals = (const int *)st->scales; + *type = IIO_VAL_INT_PLUS_MICRO; + /* Values are stored in a 2D matrix */ + *length = info->num_scales * 2; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + static int ad9467_outputmode_set(struct spi_device *spi, unsigned int mode) { int ret; @@ -381,6 +403,26 @@ static int ad9467_outputmode_set(struct spi_device *spi, unsigned int mode) AN877_ADC_TRANSFER_SYNC); } +static int ad9467_scale_fill(struct adi_axi_adc_conv *conv) +{ + const struct adi_axi_adc_chip_info *info = conv->chip_info; + struct ad9467_state *st = adi_axi_adc_conv_priv(conv); + unsigned int i, val1, val2; + + st->scales = devm_kcalloc(&st->spi->dev, ARRAY_SIZE(*st->scales), + info->num_scales, GFP_KERNEL); + if (!st->scales) + return -ENOMEM; + + for (i = 0; i < info->num_scales * 2; i++) { + __ad9467_get_scale(conv, i, &val1, &val2); + st->scales[i][0] = val1; + st->scales[i][1] = val2; + } + + return 0; +} + static int ad9467_preenable_setup(struct adi_axi_adc_conv *conv) { struct ad9467_state *st = adi_axi_adc_conv_priv(conv); @@ -441,6 +483,10 @@ static int ad9467_probe(struct spi_device *spi) conv->chip_info = &info->axi_adc_info; + ret = ad9467_scale_fill(conv); + if (ret) + return ret; + id = ad9467_spi_read(spi, AN877_ADC_REG_CHIP_ID); if (id != conv->chip_info->id) { dev_err(&spi->dev, "Mismatch CHIP_ID, got 0x%X, expected 0x%X\n", @@ -451,6 +497,7 @@ static int ad9467_probe(struct spi_device *spi) conv->reg_access = ad9467_reg_access; conv->write_raw = ad9467_write_raw; conv->read_raw = ad9467_read_raw; + conv->read_avail = ad9467_read_avail; conv->preenable_setup = ad9467_preenable_setup; st->output_mode = info->default_output_mode | diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c index aff0532a974a..ae83ada7f9f2 100644 --- a/drivers/iio/adc/adi-axi-adc.c +++ b/drivers/iio/adc/adi-axi-adc.c @@ -144,6 +144,20 @@ static int adi_axi_adc_write_raw(struct iio_dev *indio_dev, return conv->write_raw(conv, chan, val, val2, mask); } +static int adi_axi_adc_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + struct adi_axi_adc_state *st = iio_priv(indio_dev); + struct adi_axi_adc_conv *conv = &st->client->conv; + + if (!conv->read_avail) + return -EOPNOTSUPP; + + return conv->read_avail(conv, chan, vals, type, length, mask); +} + static int adi_axi_adc_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { @@ -228,69 +242,11 @@ struct adi_axi_adc_conv *devm_adi_axi_adc_conv_register(struct device *dev, } EXPORT_SYMBOL_NS_GPL(devm_adi_axi_adc_conv_register, IIO_ADI_AXI); -static ssize_t in_voltage_scale_available_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct adi_axi_adc_state *st = iio_priv(indio_dev); - struct adi_axi_adc_conv *conv = &st->client->conv; - size_t len = 0; - int i; - - for (i = 0; i < conv->chip_info->num_scales; i++) { - const unsigned int *s = conv->chip_info->scale_table[i]; - - len += scnprintf(buf + len, PAGE_SIZE - len, - "%u.%06u ", s[0], s[1]); - } - buf[len - 1] = '\n'; - - return len; -} - -static IIO_DEVICE_ATTR_RO(in_voltage_scale_available, 0); - -enum { - ADI_AXI_ATTR_SCALE_AVAIL, -}; - -#define ADI_AXI_ATTR(_en_, _file_) \ - [ADI_AXI_ATTR_##_en_] = &iio_dev_attr_##_file_.dev_attr.attr - -static struct attribute *adi_axi_adc_attributes[] = { - ADI_AXI_ATTR(SCALE_AVAIL, in_voltage_scale_available), - NULL -}; - -static umode_t axi_adc_attr_is_visible(struct kobject *kobj, - struct attribute *attr, int n) -{ - struct device *dev = kobj_to_dev(kobj); - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct adi_axi_adc_state *st = iio_priv(indio_dev); - struct adi_axi_adc_conv *conv = &st->client->conv; - - switch (n) { - case ADI_AXI_ATTR_SCALE_AVAIL: - if (!conv->chip_info->num_scales) - return 0; - return attr->mode; - default: - return attr->mode; - } -} - -static const struct attribute_group adi_axi_adc_attribute_group = { - .attrs = adi_axi_adc_attributes, - .is_visible = axi_adc_attr_is_visible, -}; - static const struct iio_info adi_axi_adc_info = { .read_raw = &adi_axi_adc_read_raw, .write_raw = &adi_axi_adc_write_raw, - .attrs = &adi_axi_adc_attribute_group, .update_scan_mode = &adi_axi_adc_update_scan_mode, + .read_avail = &adi_axi_adc_read_avail, }; static const struct adi_axi_adc_core_info adi_axi_adc_10_0_a_info = { diff --git a/include/linux/iio/adc/adi-axi-adc.h b/include/linux/iio/adc/adi-axi-adc.h index 52620e5b8052..b7904992d561 100644 --- a/include/linux/iio/adc/adi-axi-adc.h +++ b/include/linux/iio/adc/adi-axi-adc.h @@ -41,6 +41,7 @@ struct adi_axi_adc_chip_info { * @reg_access IIO debugfs_reg_access hook for the client ADC * @read_raw IIO read_raw hook for the client ADC * @write_raw IIO write_raw hook for the client ADC + * @read_avail IIO read_avail hook for the client ADC */ struct adi_axi_adc_conv { const struct adi_axi_adc_chip_info *chip_info; @@ -54,6 +55,9 @@ struct adi_axi_adc_conv { int (*write_raw)(struct adi_axi_adc_conv *conv, struct iio_chan_spec const *chan, int val, int val2, long mask); + int (*read_avail)(struct adi_axi_adc_conv *conv, + struct iio_chan_spec const *chan, + const int **val, int *type, int *length, long mask); }; struct adi_axi_adc_conv *devm_adi_axi_adc_conv_register(struct device *dev,