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[98.183.112.25]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-601db659ad8sm39865eaf.8.2025.03.12.18.16.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Mar 2025 18:16:13 -0700 (PDT) From: David Lechner Date: Wed, 12 Mar 2025 20:15:39 -0500 Subject: [PATCH 01/11] iio: adc: ad7606_spi: check error in ad7606B_sw_mode_config() Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250312-iio-adc-ad7606-improvements-v1-1-d1ec04847aea@baylibre.com> References: <20250312-iio-adc-ad7606-improvements-v1-0-d1ec04847aea@baylibre.com> In-Reply-To: <20250312-iio-adc-ad7606-improvements-v1-0-d1ec04847aea@baylibre.com> To: Jonathan Cameron , linux-iio@vger.kernel.org Cc: Michael Hennerich , Angelo Dureghello , Alexandru Ardelean , Beniamin Bia , Stefan Popa , linux-kernel@vger.kernel.org, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1102; i=dlechner@baylibre.com; h=from:subject:message-id; bh=Nsm1P9IXqK79RS5iTQ15GAMUIKO5XFHcSqUCqmzn8qc=; b=owEBgwJ8/ZANAwAKAR+K+IyC93wDAcsmYgBn0jHa/kXO9pooqHCPQs1sIidUhMs3fZytFn7t9 gsVcWOBrC2JAkkEAAEKADMWIQSKc9gqah9QmQfzc4gfiviMgvd8AwUCZ9Ix2hUcZGF2aWRAbGVj aG5vbG9neS5jb20ACgkQH4r4jIL3fAMc7Q//VBTc8uLhwPNd8mhtlYZcmXiY1rBXmfgk1ZSPvX7 rNQBIGJNniHB54qa4WZSMgICcpZQ4u2kodME6zw8CaB/qz2QVai4pTerzUO8B35cu2eCC1lbv7b rr/hupj6y2ocg8yiz+o0f98Or2P5XGpCG8rEJbKTOSyXEvQOip8emP5sx4OcRUT/UPh+ZmXkrrQ +HeDF1PwSfBfriOugQgPUWhQEwX/qHMgBQgEFto+mNG1TrRQqOouxkor5sbdwr5C9GLqZyGEjru OoBYxt81rHNRrDL2KYgu4wdSaD67wEsWBeoAUlMAgiUFVa7t+1PB3COSaHC+Sxx/EmGGHKxZGuu 3v6ZoxbzgoR88Gp0lTWa3o860Nwkd7tCxYrWCWhXXSlETW/m4dT5kCqY096W3clsMdtoh7yEByw 4HAAt3OomdgwW4h4OBqpZ48QT6T4oK0kABAVSNWwebG1jwuzriqdCU2bCCSFSlZUgh2s3Wn+Mpd Sc+5lItWP5Tdx9wINeOy6G6vnAr4zXUAZDlNODvCUG6szR7D37jjK8rsHuyCsWXV5saJ3xDbp3j 3WlpNCFoD5zTPl9iXjqVMgyYTCuXW9vbA6HXexeIbu+LngyvJ7/J8VKq7I8XgLYFj6OEGMl+qfm jVuGcp0wxRm+ROa9K+MucJtYU/AI4RDpgVFCOqw5YtZk= X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Add missing error check in ad7606B_sw_mode_config(). Fixes: d2a415c86c6b ("iio: adc: ad7606: Add support for AD7606B ADC") Signed-off-by: David Lechner --- drivers/iio/adc/ad7606_spi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c index 885bf0b68e7775c5f4a12dfb827f502d5f782e8c..c028e08efe2c82cd97249f98eec50a9a9c06471f 100644 --- a/drivers/iio/adc/ad7606_spi.c +++ b/drivers/iio/adc/ad7606_spi.c @@ -174,11 +174,13 @@ static int ad7616_sw_mode_config(struct iio_dev *indio_dev) static int ad7606B_sw_mode_config(struct iio_dev *indio_dev) { struct ad7606_state *st = iio_priv(indio_dev); + int ret; /* Configure device spi to output on a single channel */ - st->bops->reg_write(st, - AD7606_CONFIGURATION_REGISTER, - AD7606_SINGLE_DOUT); + ret = st->bops->reg_write(st, AD7606_CONFIGURATION_REGISTER, + AD7606_SINGLE_DOUT); + if (ret) + return ret; /* * Scale can be configured individually for each channel From patchwork Thu Mar 13 01:15:40 2025 Content-Type: text/plain; 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Not all buses define this callback, which resulted in a NULL pointer dereference. Fixes: e571c1902116 ("iio: adc: ad7606: move scale_setup as function pointer on chip-info") Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 631e837171679ad95e71cef2ce6c55c2c756881a..ec444aba25e89ced7b84b723aded3c9dbf2c738b 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -1236,9 +1236,11 @@ static int ad7616_sw_mode_setup(struct iio_dev *indio_dev) st->write_scale = ad7616_write_scale_sw; st->write_os = &ad7616_write_os_sw; - ret = st->bops->sw_mode_config(indio_dev); - if (ret) - return ret; + if (st->bops->sw_mode_config) { + ret = st->bops->sw_mode_config(indio_dev); + if (ret) + return ret; + } /* Activate Burst mode and SEQEN MODE */ return ad7606_write_mask(st, AD7616_CONFIGURATION_REGISTER, @@ -1268,6 +1270,9 @@ static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev) st->write_scale = ad7606_write_scale_sw; st->write_os = &ad7606_write_os_sw; 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Also fix const correctness in the cast while we are touching this. Fixes: 94aab7a0f5c7 ("iio: adc: ad7606: rework available attributes for SW channels") Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index ec444aba25e89ced7b84b723aded3c9dbf2c738b..79929bd24fa40bccfcdd88673107da4bf56e032b 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -1064,8 +1064,8 @@ static int ad7606_read_avail(struct iio_dev *indio_dev, ch = chan->address; cs = &st->chan_scales[ch]; - *vals = (int *)cs->scale_avail; - *length = cs->num_scales; + *vals = (const int *)cs->scale_avail; + *length = cs->num_scales * 2; *type = IIO_VAL_INT_PLUS_MICRO; return IIO_AVAIL_LIST; From patchwork Thu Mar 13 01:15:42 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 14014104 Received: from mail-oo1-f48.google.com (mail-oo1-f48.google.com [209.85.161.48]) (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 308E91487D1 for ; 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Previously, only one chip had this field populated. Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 79929bd24fa40bccfcdd88673107da4bf56e032b..440e1e5a9b18570dc6441bff91afbc51d20cbc47 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -196,6 +196,7 @@ static int ad7616_sw_mode_setup(struct iio_dev *indio_dev); static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev); const struct ad7606_chip_info ad7605_4_info = { + .max_samplerate = 300 * KILO, .channels = ad7605_channels, .name = "ad7605-4", .num_adc_channels = 4, @@ -205,6 +206,7 @@ const struct ad7606_chip_info ad7605_4_info = { EXPORT_SYMBOL_NS_GPL(ad7605_4_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606_8_info = { + .max_samplerate = 200 * KILO, .channels = ad7606_channels_16bit, .name = "ad7606-8", .num_adc_channels = 8, @@ -216,6 +218,7 @@ const struct ad7606_chip_info ad7606_8_info = { EXPORT_SYMBOL_NS_GPL(ad7606_8_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606_6_info = { + .max_samplerate = 200 * KILO, .channels = ad7606_channels_16bit, .name = "ad7606-6", .num_adc_channels = 6, @@ -227,6 +230,7 @@ const struct ad7606_chip_info ad7606_6_info = { EXPORT_SYMBOL_NS_GPL(ad7606_6_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606_4_info = { + .max_samplerate = 200 * KILO, .channels = ad7606_channels_16bit, .name = "ad7606-4", .num_adc_channels = 4, @@ -251,6 +255,7 @@ const struct ad7606_chip_info ad7606b_info = { EXPORT_SYMBOL_NS_GPL(ad7606b_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606c_16_info = { + .max_samplerate = 1 * MEGA, .channels = ad7606_channels_16bit, .name = "ad7606c16", .num_adc_channels = 8, @@ -263,6 +268,7 @@ const struct ad7606_chip_info ad7606c_16_info = { EXPORT_SYMBOL_NS_GPL(ad7606c_16_info, "IIO_AD7606"); const struct ad7606_chip_info ad7607_info = { + .max_samplerate = 200 * KILO, .channels = ad7607_channels, .name = "ad7607", .num_adc_channels = 8, @@ -274,6 +280,7 @@ const struct ad7606_chip_info ad7607_info = { EXPORT_SYMBOL_NS_GPL(ad7607_info, "IIO_AD7606"); const struct ad7606_chip_info ad7608_info = { + .max_samplerate = 200 * KILO, .channels = ad7608_channels, .name = "ad7608", .num_adc_channels = 8, @@ -285,6 +292,7 @@ const struct ad7606_chip_info ad7608_info = { EXPORT_SYMBOL_NS_GPL(ad7608_info, "IIO_AD7606"); const struct ad7606_chip_info ad7609_info = { + .max_samplerate = 200 * KILO, .channels = ad7608_channels, .name = "ad7609", .num_adc_channels = 8, @@ -296,6 +304,7 @@ const struct ad7606_chip_info ad7609_info = { EXPORT_SYMBOL_NS_GPL(ad7609_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606c_18_info = { + .max_samplerate = 1 * MEGA, .channels = ad7606_channels_18bit, .name = "ad7606c18", .num_adc_channels = 8, @@ -308,6 +317,7 @@ const struct ad7606_chip_info ad7606c_18_info = { EXPORT_SYMBOL_NS_GPL(ad7606c_18_info, "IIO_AD7606"); const struct ad7606_chip_info ad7616_info = { + .max_samplerate = 1 * MEGA, .channels = ad7616_channels, .init_delay_ms = 15, .name = "ad7616", From patchwork Thu Mar 13 01:15:43 2025 Content-Type: text/plain; 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Mutexes should be cleaned up on driver removal. Also add missing include while we are touching this. Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 440e1e5a9b18570dc6441bff91afbc51d20cbc47..f190269ac8ddd859e94eb24c26f5f010d0951646 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -1332,8 +1333,11 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, st = iio_priv(indio_dev); dev_set_drvdata(dev, indio_dev); + ret = devm_mutex_init(dev, &st->lock); + if (ret) + return ret; + st->dev = dev; - mutex_init(&st->lock); st->bops = bops; st->base_address = base_address; st->oversampling = 1; From patchwork Thu Mar 13 01:15:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 14014106 Received: from mail-oo1-f52.google.com (mail-oo1-f52.google.com [209.85.161.52]) (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 6DF9B17CA1B for ; 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[98.183.112.25]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-601db659ad8sm39865eaf.8.2025.03.12.18.16.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Mar 2025 18:16:23 -0700 (PDT) From: David Lechner Date: Wed, 12 Mar 2025 20:15:44 -0500 Subject: [PATCH 06/11] iio: adc: ad7606: fix kernel-doc comments Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250312-iio-adc-ad7606-improvements-v1-6-d1ec04847aea@baylibre.com> References: <20250312-iio-adc-ad7606-improvements-v1-0-d1ec04847aea@baylibre.com> In-Reply-To: <20250312-iio-adc-ad7606-improvements-v1-0-d1ec04847aea@baylibre.com> To: Jonathan Cameron , linux-iio@vger.kernel.org Cc: Michael Hennerich , Angelo Dureghello , Alexandru Ardelean , Beniamin Bia , Stefan Popa , linux-kernel@vger.kernel.org, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=7781; i=dlechner@baylibre.com; h=from:subject:message-id; bh=G6T/2KDF4C5JsW8WYTxDGIcsK077JHDl513PdKR03Zs=; b=owEBgwJ8/ZANAwAKAR+K+IyC93wDAcsmYgBn0jHbIlTN9NpWATQrGaRPKhfK7x4ZDeRxfGXTW +l8VL0aqNOJAkkEAAEKADMWIQSKc9gqah9QmQfzc4gfiviMgvd8AwUCZ9Ix2xUcZGF2aWRAbGVj aG5vbG9neS5jb20ACgkQH4r4jIL3fAOg1hAAkJ4wWePRT0ryxssBC1FBgRQaSo+RSKtGWSTPxO7 iSrSvH+3+TqfJNQ1MHeeDCY/5v1tUxDYlcEUZPfFsHdsunYUFUgcPhETm9qsTjJB/11eTZNXKoe GtrEa1WM6xtT6rXAD4Yq1/cQpHruvq1WHACRH2M5n1TUpjzDNDwms+Tlphb7aIYDvBWewM9HW0V xb0rXtMAliIhDdb5627WsOO57wzwVn8UQrXr4LF5YxHCPII9HtsmD6mvlhl5EjI3wYsNmHQdS6a DmL8sePfnqGgFmiBalVdTScGZDVXwPEVUVF7s5ODUVp+r41JG/qXylrlhsWLNW+2xvZXRd98QTD Gsd1WJxtLmrzZelk9AsavwpKVk+1SbYITaKyrQeuk8fYCyuGgiTelPZPkPj1wna93hWPJ7a/qlt r5UfwEz4wzWSJVVmIj1eMKtXcQfV36izGNkxIvod8EFNmKbzJjRmrBZkdYueClhmWe22A9pDaKG fzza7PvpeAoz1VaqyTFZwZCnYeWfwDsutZOMbKGjXin9yigJd4aBdtV1/e4gSiNu4p3nC+lMmkx P0cXw7XW85ZBPI8EErEaeMKAyotpi2i2z99ltexlQxH2hFxYfoz2qbYWnVQb/Sk8GDkfcKVopuy cKxbdlh18FJSIq0nEKLmgLRvxz2+9gVGYlzeoCc5twPk= X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Fix several issues with kernel-doc comments in ad7606.h: * Add missing ":" to @param names. * Add some missing parameters. * Remove some non-existent parameters. * Fix alignment and wrapping. * Fix some spelling. `./scripts/kernel-doc -v -none drivers/iio/adc/ad7606*` is happy now. Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.h | 90 ++++++++++++++++++++++++------------------------ 1 file changed, 45 insertions(+), 45 deletions(-) diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h index 71a30525eaab512fa811f28fa79268a1a976bc8c..3da78488c8a247dccbff930023f98717d540081a 100644 --- a/drivers/iio/adc/ad7606.h +++ b/drivers/iio/adc/ad7606.h @@ -120,17 +120,17 @@ typedef int (*ad7606_sw_setup_cb_t)(struct iio_dev *indio_dev); /** * struct ad7606_chip_info - chip specific information * @channels: channel specification - * @max_samplerate: maximum supported samplerate - * @name device name + * @max_samplerate: maximum supported sample rate + * @name: device name * @num_channels: number of channels - * @num_adc_channels the number of channels the ADC actually inputs. + * @num_adc_channels: the number of channels the ADC actually inputs. * @scale_setup_cb: callback to setup the scales for each channel * @sw_setup_cb: callback to setup the software mode if available. - * @oversampling_avail pointer to the array which stores the available + * @oversampling_avail: pointer to the array which stores the available * oversampling ratios. - * @oversampling_num number of elements stored in oversampling_avail array - * @os_req_reset some devices require a reset to update oversampling - * @init_delay_ms required delay in milliseconds for initialization + * @oversampling_num: number of elements stored in oversampling_avail array + * @os_req_reset: some devices require a reset to update oversampling + * @init_delay_ms: required delay in milliseconds for initialization * after a restart */ struct ad7606_chip_info { @@ -149,10 +149,10 @@ struct ad7606_chip_info { /** * struct ad7606_chan_scale - channel scale configuration - * @scale_avail pointer to the array which stores the available scales - * @num_scales number of elements stored in the scale_avail array - * @range voltage range selection, selects which scale to apply - * @reg_offset offset for the register value, to be applied when + * @scale_avail: pointer to the array which stores the available scales + * @num_scales: number of elements stored in the scale_avail array + * @range: voltage range selection, selects which scale to apply + * @reg_offset: offset for the register value, to be applied when * writing the value of 'range' to the register value */ struct ad7606_chan_scale { @@ -165,32 +165,33 @@ struct ad7606_chan_scale { /** * struct ad7606_state - driver instance specific data - * @dev pointer to kernel device - * @chip_info entry in the table of chips that describes this device - * @bops bus operations (SPI or parallel) - * @chan_scales scale configuration for channels - * @oversampling oversampling selection - * @cnvst_pwm pointer to the PWM device connected to the cnvst pin - * @base_address address from where to read data in parallel operation - * @sw_mode_en software mode enabled - * @oversampling_avail pointer to the array which stores the available + * @dev: pointer to kernel device + * @chip_info: entry in the table of chips that describes this device + * @bops: bus operations (SPI or parallel) + * @chan_scales: scale configuration for channels + * @oversampling: oversampling selection + * @cnvst_pwm: pointer to the PWM device connected to the cnvst pin + * @base_address: address from where to read data in parallel operation + * @sw_mode_en: software mode enabled + * @oversampling_avail: pointer to the array which stores the available * oversampling ratios. - * @num_os_ratios number of elements stored in oversampling_avail array - * @write_scale pointer to the function which writes the scale - * @write_os pointer to the function which writes the os - * @lock protect sensor state from concurrent accesses to GPIOs - * @gpio_convst GPIO descriptor for conversion start signal (CONVST) - * @gpio_reset GPIO descriptor for device hard-reset - * @gpio_range GPIO descriptor for range selection - * @gpio_standby GPIO descriptor for stand-by signal (STBY), + * @num_os_ratios: number of elements stored in oversampling_avail array + * @back: pointer to the iio_backend structure, if used + * @write_scale: pointer to the function which writes the scale + * @write_os: pointer to the function which writes the os + * @lock: protect sensor state from concurrent accesses to GPIOs + * @gpio_convst: GPIO descriptor for conversion start signal (CONVST) + * @gpio_reset: GPIO descriptor for device hard-reset + * @gpio_range: GPIO descriptor for range selection + * @gpio_standby: GPIO descriptor for stand-by signal (STBY), * controls power-down mode of device - * @gpio_frstdata GPIO descriptor for reading from device when data + * @gpio_frstdata: GPIO descriptor for reading from device when data * is being read on the first channel - * @gpio_os GPIO descriptors to control oversampling on the device - * @complete completion to indicate end of conversion - * @trig The IIO trigger associated with the device. - * @data buffer for reading data from the device - * @d16 be16 buffer for reading data from the device + * @gpio_os: GPIO descriptors to control oversampling on the device + * @trig: The IIO trigger associated with the device. + * @completion: completion to indicate end of conversion + * @data: buffer for reading data from the device + * @d16: be16 buffer for reading data from the device */ struct ad7606_state { struct device *dev; @@ -232,17 +233,16 @@ struct ad7606_state { /** * struct ad7606_bus_ops - driver bus operations - * @iio_backend_config function pointer for configuring the iio_backend for + * @iio_backend_config: function pointer for configuring the iio_backend for * the compatibles that use it - * @read_block function pointer for reading blocks of data + * @read_block: function pointer for reading blocks of data * @sw_mode_config: pointer to a function which configured the device * for software mode - * @reg_read function pointer for reading spi register - * @reg_write function pointer for writing spi register - * @write_mask function pointer for write spi register with mask - * @update_scan_mode function pointer for handling the calls to iio_info's update_scan - * mode when enabling/disabling channels. - * @rd_wr_cmd pointer to the function which calculates the spi address + * @reg_read: function pointer for reading spi register + * @reg_write: function pointer for writing spi register + * @update_scan_mode: function pointer for handling the calls to iio_info's + * update_scan mode when enabling/disabling channels. + * @rd_wr_cmd: pointer to the function which calculates the spi address */ struct ad7606_bus_ops { /* more methods added in future? */ @@ -258,9 +258,9 @@ struct ad7606_bus_ops { }; /** - 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Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.h | 2 +- drivers/iio/adc/ad7606_spi.c | 16 ++++++++-------- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h index 3da78488c8a247dccbff930023f98717d540081a..01b0e2fcf343a77631fbf20c12ac9d02c80c3455 100644 --- a/drivers/iio/adc/ad7606.h +++ b/drivers/iio/adc/ad7606.h @@ -254,7 +254,7 @@ struct ad7606_bus_ops { unsigned int addr, unsigned int val); int (*update_scan_mode)(struct iio_dev *indio_dev, const unsigned long *scan_mask); - u16 (*rd_wr_cmd)(int addr, char isWriteOp); + u16 (*rd_wr_cmd)(int addr, char is_write_op); }; /** diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c index c028e08efe2c82cd97249f98eec50a9a9c06471f..1abaf8626206cb30e532cf9f82e0d050706aa1e0 100644 --- a/drivers/iio/adc/ad7606_spi.c +++ b/drivers/iio/adc/ad7606_spi.c @@ -59,16 +59,16 @@ static const struct iio_chan_spec ad7606c_18_sw_channels[] = { AD7606_SW_CHANNEL(7, 18), }; -static u16 ad7616_spi_rd_wr_cmd(int addr, char isWriteOp) +static u16 ad7616_spi_rd_wr_cmd(int addr, char is_write_op) { /* * The address of register consist of one w/r bit * 6 bits of address followed by one reserved bit. */ - return ((addr & 0x7F) << 1) | ((isWriteOp & 0x1) << 7); + return ((addr & 0x7F) << 1) | ((is_write_op & 0x1) << 7); } -static u16 ad7606B_spi_rd_wr_cmd(int addr, char is_write_op) +static u16 ad7606b_spi_rd_wr_cmd(int addr, char is_write_op) { /* * The address of register consists of one bit which @@ -171,7 +171,7 @@ static int ad7616_sw_mode_config(struct iio_dev *indio_dev) return 0; } -static int ad7606B_sw_mode_config(struct iio_dev *indio_dev) +static int ad7606b_sw_mode_config(struct iio_dev *indio_dev) { struct ad7606_state *st = iio_priv(indio_dev); int ret; @@ -195,7 +195,7 @@ static int ad7606c_18_sw_mode_config(struct iio_dev *indio_dev) { int ret; - ret = ad7606B_sw_mode_config(indio_dev); + ret = ad7606b_sw_mode_config(indio_dev); if (ret) return ret; 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This field was duplicating the same info that was already in the channel and scan_index fields. This is one less thing to have to hold in your mind when reading the code. Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 8 ++++---- drivers/iio/adc/ad7606.h | 1 - 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index f190269ac8ddd859e94eb24c26f5f010d0951646..02ff4be3545d45f0e10bbea7251862f4e3daf97f 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -776,14 +776,14 @@ static int ad7606_read_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_RAW: if (!iio_device_claim_direct(indio_dev)) return -EBUSY; - ret = ad7606_scan_direct(indio_dev, chan->address, val); + ret = ad7606_scan_direct(indio_dev, chan->scan_index, val); iio_device_release_direct(indio_dev); if (ret < 0) return ret; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: if (st->sw_mode_en) - ch = chan->address; + ch = chan->scan_index; cs = &st->chan_scales[ch]; *val = cs->scale_avail[cs->range][0]; *val2 = cs->scale_avail[cs->range][1]; @@ -865,7 +865,7 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_SCALE: if (st->sw_mode_en) - ch = chan->address; + ch = chan->scan_index; cs = &st->chan_scales[ch]; for (i = 0; i < cs->num_scales; i++) { scale_avail_uv[i] = cs->scale_avail[i][0] * MICRO + @@ -1072,7 +1072,7 @@ static int ad7606_read_avail(struct iio_dev *indio_dev, case IIO_CHAN_INFO_SCALE: if (st->sw_mode_en) - ch = chan->address; + ch = chan->scan_index; cs = &st->chan_scales[ch]; *vals = (const int *)cs->scale_avail; diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h index 01b0e2fcf343a77631fbf20c12ac9d02c80c3455..f6a6c89dbdc708f4e25e3c9ade9e9e614a7f99b1 100644 --- a/drivers/iio/adc/ad7606.h +++ b/drivers/iio/adc/ad7606.h @@ -45,7 +45,6 @@ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = num, \ - .address = num, \ .info_mask_separate = mask_sep, \ .info_mask_separate_available = \ mask_sep_avail, \ From patchwork Thu Mar 13 01:15:47 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 14014109 Received: from mail-oo1-f41.google.com (mail-oo1-f41.google.com [209.85.161.41]) (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 833CA1C84D6 for ; 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The same info is already available from the chan param via chan->scan_type and chan->channel, so the parameter is redundant. Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 44 +++++++++++++++++++++++--------------------- drivers/iio/adc/ad7606.h | 2 +- 2 files changed, 24 insertions(+), 22 deletions(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 02ff4be3545d45f0e10bbea7251862f4e3daf97f..12871134b22f5ebcb66e9b57cefb8affa523685e 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -182,17 +182,17 @@ static const struct iio_chan_spec ad7616_channels[] = { }; static int ad7606c_18bit_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch); + struct iio_chan_spec *chan); static int ad7606c_16bit_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch); + struct iio_chan_spec *chan); static int ad7606_16bit_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch); + struct iio_chan_spec *chan); static int ad7607_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch); + struct iio_chan_spec *chan); static int ad7608_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch); + struct iio_chan_spec *chan); static int ad7609_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch); + struct iio_chan_spec *chan); static int ad7616_sw_mode_setup(struct iio_dev *indio_dev); static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev); @@ -346,10 +346,10 @@ int ad7606_reset(struct ad7606_state *st) EXPORT_SYMBOL_NS_GPL(ad7606_reset, "IIO_AD7606"); static int ad7606_16bit_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch) + struct iio_chan_spec *chan) { struct ad7606_state *st = iio_priv(indio_dev); - struct ad7606_chan_scale *cs = &st->chan_scales[ch]; + struct ad7606_chan_scale *cs = &st->chan_scales[chan->scan_index]; if (!st->sw_mode_en) { /* tied to logic low, analog input range is +/- 5V */ @@ -425,10 +425,10 @@ static int ad7606_get_chan_config(struct iio_dev *indio_dev, int ch, } static int ad7606c_18bit_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch) + struct iio_chan_spec *chan) { struct ad7606_state *st = iio_priv(indio_dev); - struct ad7606_chan_scale *cs = &st->chan_scales[ch]; + struct ad7606_chan_scale *cs = &st->chan_scales[chan->scan_index]; bool bipolar, differential; int ret; @@ -439,7 +439,8 @@ static int ad7606c_18bit_chan_scale_setup(struct iio_dev *indio_dev, return 0; } - ret = ad7606_get_chan_config(indio_dev, ch, &bipolar, &differential); + ret = ad7606_get_chan_config(indio_dev, chan->scan_index, &bipolar, + &differential); if (ret) return ret; @@ -482,10 +483,10 @@ static int ad7606c_18bit_chan_scale_setup(struct iio_dev *indio_dev, } static int ad7606c_16bit_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch) + struct iio_chan_spec *chan) { struct ad7606_state *st = iio_priv(indio_dev); - struct ad7606_chan_scale *cs = &st->chan_scales[ch]; + struct ad7606_chan_scale *cs = &st->chan_scales[chan->scan_index]; bool bipolar, differential; int ret; @@ -496,7 +497,8 @@ static int ad7606c_16bit_chan_scale_setup(struct iio_dev *indio_dev, return 0; } - ret = ad7606_get_chan_config(indio_dev, ch, &bipolar, &differential); + ret = ad7606_get_chan_config(indio_dev, chan->scan_index, &bipolar, + &differential); if (ret) return ret; @@ -540,10 +542,10 @@ static int ad7606c_16bit_chan_scale_setup(struct iio_dev *indio_dev, } static int ad7607_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch) + struct iio_chan_spec *chan) { struct ad7606_state *st = iio_priv(indio_dev); - struct ad7606_chan_scale *cs = &st->chan_scales[ch]; + struct ad7606_chan_scale *cs = &st->chan_scales[chan->scan_index]; cs->range = 0; cs->scale_avail = ad7607_hw_scale_avail; @@ -552,10 +554,10 @@ static int ad7607_chan_scale_setup(struct iio_dev *indio_dev, } static int ad7608_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch) + struct iio_chan_spec *chan) { struct ad7606_state *st = iio_priv(indio_dev); - struct ad7606_chan_scale *cs = &st->chan_scales[ch]; + struct ad7606_chan_scale *cs = &st->chan_scales[chan->scan_index]; cs->range = 0; cs->scale_avail = ad7606_18bit_hw_scale_avail; @@ -564,10 +566,10 @@ static int ad7608_chan_scale_setup(struct iio_dev *indio_dev, } static int ad7609_chan_scale_setup(struct iio_dev *indio_dev, - struct iio_chan_spec *chan, int ch) + struct iio_chan_spec *chan) { struct ad7606_state *st = iio_priv(indio_dev); - struct ad7606_chan_scale *cs = &st->chan_scales[ch]; + struct ad7606_chan_scale *cs = &st->chan_scales[chan->scan_index]; cs->range = 0; cs->scale_avail = ad7609_hw_scale_avail; @@ -1305,7 +1307,7 @@ static int ad7606_chan_scales_setup(struct iio_dev *indio_dev) indio_dev->channels = chans; for (ch = 0; ch < st->chip_info->num_adc_channels; ch++) { - ret = st->chip_info->scale_setup_cb(indio_dev, &chans[ch + offset], ch); + ret = st->chip_info->scale_setup_cb(indio_dev, &chans[ch + offset]); if (ret) return ret; } diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h index f6a6c89dbdc708f4e25e3c9ade9e9e614a7f99b1..fd4c0d615a880ac6fdcaad213d4843329c3bd7fe 100644 --- a/drivers/iio/adc/ad7606.h +++ b/drivers/iio/adc/ad7606.h @@ -113,7 +113,7 @@ struct ad7606_state; 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[98.183.112.25]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-601db659ad8sm39865eaf.8.2025.03.12.18.16.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Mar 2025 18:16:34 -0700 (PDT) From: David Lechner Date: Wed, 12 Mar 2025 20:15:48 -0500 Subject: [PATCH 10/11] iio: adc: ad7606: dynamically allocate channel info Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250312-iio-adc-ad7606-improvements-v1-10-d1ec04847aea@baylibre.com> References: <20250312-iio-adc-ad7606-improvements-v1-0-d1ec04847aea@baylibre.com> In-Reply-To: <20250312-iio-adc-ad7606-improvements-v1-0-d1ec04847aea@baylibre.com> To: Jonathan Cameron , linux-iio@vger.kernel.org Cc: Michael Hennerich , Angelo Dureghello , Alexandru Ardelean , Beniamin Bia , Stefan Popa , linux-kernel@vger.kernel.org, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=24015; i=dlechner@baylibre.com; h=from:subject:message-id; bh=JMX6wF/Wi0W6m+5PXlr1OVY5Q4zq4jQJg9QzPmRrpxA=; b=owEBgwJ8/ZANAwAKAR+K+IyC93wDAcsmYgBn0jHbC0yGWDZZpnFZ7rCFn57zIg7LLwnd7iM7p GNeVqGF21KJAkkEAAEKADMWIQSKc9gqah9QmQfzc4gfiviMgvd8AwUCZ9Ix2xUcZGF2aWRAbGVj aG5vbG9neS5jb20ACgkQH4r4jIL3fAO2JxAApAQRBc/Njo7+O6BemdKPWXGQLEkfhCA/1SrT5Kl 8StmnEgk28KwEqwjiya9PAJYUXdX8zZoGG+90fYrN78P4Qp9vpctsykvrxo0NGLhrolKQdXDGr1 7TskTeYzi85zKABo7J/zRE/4QGjmkmpgZ1QFwq4gDPhwRF0nE7pIeo5kBeGo86sCrHNvnr7Do9A TdJxvuTlN6BSa5Aiek28G52lgM6WFzXNa7FTWhqRDGUI1LfE36cTUbItgT1meYVX/RnABhfbq/w SbT6hzvsEt+h9jJEzL7NM3Y7krjhYvNuZ9Q9S6wXCBJM5T0l2xA5usu6XzsOP4BYzKowhcBb67r FyOrrtw5sKdPHQA5x9iZqElushiecgp1UAsl5d2De0m3EvE5sRzYWi427MQX2hBQiFBBfr+3Psa +0+GUyCtkFFTNAlhyfN/2oqw9pMtRV2TRlN/9Owvs3t38fadVc0L89x/ZCadeWoKYtc4oDDrmwR DRcpt283lwRhbHRgfGiF17nnmToSXkLYnZAjmUWWGFF70bvulpg2lxukgke+B6hAMOdaDzkPpFB u4UfApyYzHRjIhemP8rJvcmfzKDYOcoHY2PWoJBqzlN3zmBxNzvf+K7sv3w/qGlEt1WbfcMGWMI nBqRBBVy5xWxAzE0DIASbZjP2Gsefv+UknXOsgtxPAIg= X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Refactor the ad7606 drivers to dynamically allocate the channel info. The channel info was getting a bit unwieldy. In some cases, the indio_dev->channels field was getting assigned up to 3 different times, each in a different function, making it difficult to see where the info was coming from. This problem stemps from the number of permutations of the channel array needed to support various modes of operation and data buses. We already have 4 per chip (hardware mode, software mode, AXI ADC backend and AXI ADC backend with software mode) and we intend to add two more per chip when adding SPI offload support. To make it easier to read and maintain, move all of the channel setup to a single function that dynamically allocates and fills in the channel info. Additionally, this lets us remove some hacks where we had to compute an offset due to the fact that sometimes there was a soft timestamp channel at the start of the array. Now the timestamp channel is always at the end of the array as is typical in other drivers. Signed-off-by: David Lechner --- drivers/iio/adc/ad7606.c | 232 ++++++++++++++++++------------------------- drivers/iio/adc/ad7606.h | 76 +------------- drivers/iio/adc/ad7606_par.c | 33 ------ drivers/iio/adc/ad7606_spi.c | 86 +--------------- 4 files changed, 102 insertions(+), 325 deletions(-) diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index 12871134b22f5ebcb66e9b57cefb8affa523685e..e6eb82b4de09dc35753f9ca363f619ff93884e56 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -95,92 +95,6 @@ static const unsigned int ad7616_oversampling_avail[8] = { 1, 2, 4, 8, 16, 32, 64, 128, }; -static const struct iio_chan_spec ad7605_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(4), - AD7605_CHANNEL(0), - AD7605_CHANNEL(1), - AD7605_CHANNEL(2), - AD7605_CHANNEL(3), -}; - -static const struct iio_chan_spec ad7606_channels_16bit[] = { - IIO_CHAN_SOFT_TIMESTAMP(8), - AD7606_CHANNEL(0, 16), - AD7606_CHANNEL(1, 16), - AD7606_CHANNEL(2, 16), - AD7606_CHANNEL(3, 16), - AD7606_CHANNEL(4, 16), - AD7606_CHANNEL(5, 16), - AD7606_CHANNEL(6, 16), - AD7606_CHANNEL(7, 16), -}; - -static const struct iio_chan_spec ad7606_channels_18bit[] = { - IIO_CHAN_SOFT_TIMESTAMP(8), - AD7606_CHANNEL(0, 18), - AD7606_CHANNEL(1, 18), - AD7606_CHANNEL(2, 18), - AD7606_CHANNEL(3, 18), - AD7606_CHANNEL(4, 18), - AD7606_CHANNEL(5, 18), - AD7606_CHANNEL(6, 18), - AD7606_CHANNEL(7, 18), -}; - -static const struct iio_chan_spec ad7607_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(8), - AD7606_CHANNEL(0, 14), - AD7606_CHANNEL(1, 14), - AD7606_CHANNEL(2, 14), - AD7606_CHANNEL(3, 14), - AD7606_CHANNEL(4, 14), - AD7606_CHANNEL(5, 14), - AD7606_CHANNEL(6, 14), - AD7606_CHANNEL(7, 14), -}; - -static const struct iio_chan_spec ad7608_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(8), - AD7606_CHANNEL(0, 18), - AD7606_CHANNEL(1, 18), - AD7606_CHANNEL(2, 18), - AD7606_CHANNEL(3, 18), - AD7606_CHANNEL(4, 18), - AD7606_CHANNEL(5, 18), - AD7606_CHANNEL(6, 18), - AD7606_CHANNEL(7, 18), -}; - -/* - * The current assumption that this driver makes for AD7616, is that it's - * working in Hardware Mode with Serial, Burst and Sequencer modes activated. - * To activate them, following pins must be pulled high: - * -SER/PAR - * -SEQEN - * And following pins must be pulled low: - * -WR/BURST - * -DB4/SER1W - */ -static const struct iio_chan_spec ad7616_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(16), - AD7606_CHANNEL(0, 16), - AD7606_CHANNEL(1, 16), - AD7606_CHANNEL(2, 16), - AD7606_CHANNEL(3, 16), - AD7606_CHANNEL(4, 16), - AD7606_CHANNEL(5, 16), - AD7606_CHANNEL(6, 16), - AD7606_CHANNEL(7, 16), - AD7606_CHANNEL(8, 16), - AD7606_CHANNEL(9, 16), - AD7606_CHANNEL(10, 16), - AD7606_CHANNEL(11, 16), - AD7606_CHANNEL(12, 16), - AD7606_CHANNEL(13, 16), - AD7606_CHANNEL(14, 16), - AD7606_CHANNEL(15, 16), -}; - static int ad7606c_18bit_chan_scale_setup(struct iio_dev *indio_dev, struct iio_chan_spec *chan); static int ad7606c_16bit_chan_scale_setup(struct iio_dev *indio_dev, @@ -198,20 +112,18 @@ static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev); const struct ad7606_chip_info ad7605_4_info = { .max_samplerate = 300 * KILO, - .channels = ad7605_channels, .name = "ad7605-4", + .bits = 16, .num_adc_channels = 4, - .num_channels = 5, .scale_setup_cb = ad7606_16bit_chan_scale_setup, }; EXPORT_SYMBOL_NS_GPL(ad7605_4_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606_8_info = { .max_samplerate = 200 * KILO, - .channels = ad7606_channels_16bit, .name = "ad7606-8", + .bits = 16, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7606_16bit_chan_scale_setup, @@ -220,10 +132,9 @@ EXPORT_SYMBOL_NS_GPL(ad7606_8_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606_6_info = { .max_samplerate = 200 * KILO, - .channels = ad7606_channels_16bit, .name = "ad7606-6", + .bits = 16, .num_adc_channels = 6, - .num_channels = 7, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7606_16bit_chan_scale_setup, @@ -232,10 +143,9 @@ EXPORT_SYMBOL_NS_GPL(ad7606_6_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606_4_info = { .max_samplerate = 200 * KILO, - .channels = ad7606_channels_16bit, .name = "ad7606-4", + .bits = 16, .num_adc_channels = 4, - .num_channels = 5, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7606_16bit_chan_scale_setup, @@ -243,11 +153,10 @@ const struct ad7606_chip_info ad7606_4_info = { EXPORT_SYMBOL_NS_GPL(ad7606_4_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606b_info = { - .channels = ad7606_channels_16bit, .max_samplerate = 800 * KILO, .name = "ad7606b", + .bits = 16, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7606_16bit_chan_scale_setup, @@ -257,10 +166,9 @@ EXPORT_SYMBOL_NS_GPL(ad7606b_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606c_16_info = { .max_samplerate = 1 * MEGA, - .channels = ad7606_channels_16bit, .name = "ad7606c16", + .bits = 16, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7606c_16bit_chan_scale_setup, @@ -270,10 +178,9 @@ EXPORT_SYMBOL_NS_GPL(ad7606c_16_info, "IIO_AD7606"); const struct ad7606_chip_info ad7607_info = { .max_samplerate = 200 * KILO, - .channels = ad7607_channels, .name = "ad7607", + .bits = 14, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7607_chan_scale_setup, @@ -282,10 +189,9 @@ EXPORT_SYMBOL_NS_GPL(ad7607_info, "IIO_AD7606"); const struct ad7606_chip_info ad7608_info = { .max_samplerate = 200 * KILO, - .channels = ad7608_channels, .name = "ad7608", + .bits = 18, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7608_chan_scale_setup, @@ -294,10 +200,9 @@ EXPORT_SYMBOL_NS_GPL(ad7608_info, "IIO_AD7606"); const struct ad7606_chip_info ad7609_info = { .max_samplerate = 200 * KILO, - .channels = ad7608_channels, .name = "ad7609", + .bits = 18, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7609_chan_scale_setup, @@ -306,10 +211,9 @@ EXPORT_SYMBOL_NS_GPL(ad7609_info, "IIO_AD7606"); const struct ad7606_chip_info ad7606c_18_info = { .max_samplerate = 1 * MEGA, - .channels = ad7606_channels_18bit, .name = "ad7606c18", + .bits = 18, .num_adc_channels = 8, - .num_channels = 9, .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), .scale_setup_cb = ad7606c_18bit_chan_scale_setup, @@ -319,11 +223,10 @@ EXPORT_SYMBOL_NS_GPL(ad7606c_18_info, "IIO_AD7606"); const struct ad7606_chip_info ad7616_info = { .max_samplerate = 1 * MEGA, - .channels = ad7616_channels, .init_delay_ms = 15, .name = "ad7616", + .bits = 16, .num_adc_channels = 16, - .num_channels = 17, .oversampling_avail = ad7616_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7616_oversampling_avail), .os_req_reset = true, @@ -373,7 +276,6 @@ static int ad7606_get_chan_config(struct iio_dev *indio_dev, int ch, { struct ad7606_state *st = iio_priv(indio_dev); unsigned int num_channels = st->chip_info->num_adc_channels; - unsigned int offset = indio_dev->num_channels - st->chip_info->num_adc_channels; struct device *dev = st->dev; int ret; @@ -389,7 +291,7 @@ static int ad7606_get_chan_config(struct iio_dev *indio_dev, int ch, continue; /* channel number (here) is from 1 to num_channels */ - if (reg < offset || reg > num_channels) { + if (reg < 1 || reg > num_channels) { dev_warn(dev, "Invalid channel number (ignoring): %d\n", reg); continue; @@ -706,8 +608,8 @@ static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned int ch, int *val) { struct ad7606_state *st = iio_priv(indio_dev); - unsigned int realbits = st->chip_info->channels[1].scan_type.realbits; const struct iio_chan_spec *chan; + unsigned int realbits; int ret; if (st->gpio_convst) { @@ -739,7 +641,9 @@ static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned int ch, if (ret) goto error_ret; - chan = &indio_dev->channels[ch + 1]; + chan = &indio_dev->channels[ch]; + realbits = chan->scan_type.realbits; + if (chan->scan_type.sign == 'u') { if (realbits > 16) *val = st->data.buf32[ch]; @@ -1289,29 +1193,84 @@ static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev) return st->bops->sw_mode_config(indio_dev); } -static int ad7606_chan_scales_setup(struct iio_dev *indio_dev) +static int ad7606_probe_channels(struct iio_dev *indio_dev) { struct ad7606_state *st = iio_priv(indio_dev); - unsigned int offset = indio_dev->num_channels - st->chip_info->num_adc_channels; - struct iio_chan_spec *chans; - size_t size; - int ch, ret; - - /* Clone IIO channels, since some may be differential */ - size = indio_dev->num_channels * sizeof(*indio_dev->channels); - chans = devm_kzalloc(st->dev, size, GFP_KERNEL); - if (!chans) + struct device *dev = indio_dev->dev.parent; + struct iio_chan_spec *channels; + bool slow_bus; + int ret, i; + + slow_bus = !st->bops->iio_backend_config; + indio_dev->num_channels = st->chip_info->num_adc_channels; + + /* Slow buses also get 1 more channel for soft timestamp */ + if (slow_bus) + indio_dev->num_channels++; + + channels = devm_kcalloc(dev, indio_dev->num_channels, sizeof(*channels), + GFP_KERNEL); + if (!channels) return -ENOMEM; - memcpy(chans, indio_dev->channels, size); - indio_dev->channels = chans; + for (i = 0; i < indio_dev->num_channels; i++) { + struct iio_chan_spec *chan = &channels[i]; - for (ch = 0; ch < st->chip_info->num_adc_channels; ch++) { - ret = st->chip_info->scale_setup_cb(indio_dev, &chans[ch + offset]); + chan->type = IIO_VOLTAGE; + chan->indexed = 1; + chan->channel = i; + chan->scan_index = i; + chan->scan_type.sign = 's'; + chan->scan_type.realbits = st->chip_info->bits; + chan->scan_type.storagebits = st->chip_info->bits > 16 ? 32 : 16; + chan->scan_type.endianness = IIO_CPU; + + if (indio_dev->modes & INDIO_DIRECT_MODE) + chan->info_mask_separate |= BIT(IIO_CHAN_INFO_RAW); + + if (st->sw_mode_en) { + chan->info_mask_separate |= BIT(IIO_CHAN_INFO_SCALE); + chan->info_mask_separate_available |= + BIT(IIO_CHAN_INFO_SCALE); + + /** + * All chips with software mode support oversampling, + * so we skip the oversampling_available check. And the + * shared_by_type instead of shared_by_all on slow + * buses is for backward compatibility. + */ + if (slow_bus) + chan->info_mask_shared_by_type |= + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO); + else + chan->info_mask_shared_by_all |= + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO); + + chan->info_mask_shared_by_all_available |= + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO); + } else { + chan->info_mask_shared_by_type |= + BIT(IIO_CHAN_INFO_SCALE); + + if (st->chip_info->oversampling_avail) + chan->info_mask_shared_by_all |= + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO); + } + + if (!slow_bus) + chan->info_mask_shared_by_all |= + BIT(IIO_CHAN_INFO_SAMP_FREQ); + + ret = st->chip_info->scale_setup_cb(indio_dev, chan); if (ret) return ret; } + if (slow_bus) + channels[i] = (struct iio_chan_spec)IIO_CHAN_SOFT_TIMESTAMP(i); + + indio_dev->channels = channels; + return 0; } @@ -1343,6 +1302,11 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, st->bops = bops; st->base_address = base_address; st->oversampling = 1; + st->sw_mode_en = device_property_read_bool(dev, "adi,sw-mode"); + + if (st->sw_mode_en && !chip_info->sw_setup_cb) + return dev_err_probe(dev, -EINVAL, + "Software mode is not supported for this chip\n"); ret = devm_regulator_get_enable(dev, "avcc"); if (ret) @@ -1371,10 +1335,14 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, else indio_dev->info = &ad7606_info_no_os_or_range; } - indio_dev->modes = INDIO_DIRECT_MODE; + + /* AXI ADC backend doesn't support single read. */ + indio_dev->modes = st->bops->iio_backend_config ? 0 : INDIO_DIRECT_MODE; indio_dev->name = chip_info->name; - indio_dev->channels = st->chip_info->channels; - indio_dev->num_channels = st->chip_info->num_channels; + + ret = ad7606_probe_channels(indio_dev); + if (ret) + return ret; ret = ad7606_reset(st); if (ret) @@ -1466,17 +1434,11 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, st->write_scale = ad7606_write_scale_hw; st->write_os = ad7606_write_os_hw; - st->sw_mode_en = st->chip_info->sw_setup_cb && - device_property_present(st->dev, "adi,sw-mode"); if (st->sw_mode_en) { indio_dev->info = &ad7606_info_sw_mode; st->chip_info->sw_setup_cb(indio_dev); } - ret = ad7606_chan_scales_setup(indio_dev); - if (ret) - return ret; - return devm_iio_device_register(dev, indio_dev); } EXPORT_SYMBOL_NS_GPL(ad7606_probe, "IIO_AD7606"); diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h index fd4c0d615a880ac6fdcaad213d4843329c3bd7fe..b67058cd021a3d00ff0f461766d51e46d7998f32 100644 --- a/drivers/iio/adc/ad7606.h +++ b/drivers/iio/adc/ad7606.h @@ -40,76 +40,6 @@ #define AD7606_RANGE_CH_ADDR(ch) (0x03 + ((ch) >> 1)) #define AD7606_OS_MODE 0x08 -#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all, \ - mask_sep_avail, mask_all_avail, bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .channel = num, \ - .info_mask_separate = mask_sep, \ - .info_mask_separate_available = \ - mask_sep_avail, \ - .info_mask_shared_by_type = mask_type, \ - .info_mask_shared_by_all = mask_all, \ - .info_mask_shared_by_all_available = \ - mask_all_avail, \ - .scan_index = num, \ - .scan_type = { \ - .sign = 's', \ - .realbits = (bits), \ - .storagebits = (bits) > 16 ? 32 : 16, \ - .endianness = IIO_CPU, \ - }, \ -} - -#define AD7606_SW_CHANNEL(num, bits) \ - AD760X_CHANNEL(num, \ - /* mask separate */ \ - BIT(IIO_CHAN_INFO_RAW) | \ - BIT(IIO_CHAN_INFO_SCALE), \ - /* mask type */ \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ - /* mask all */ \ - 0, \ - /* mask separate available */ \ - BIT(IIO_CHAN_INFO_SCALE), \ - /* mask all available */ \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ - bits) - -#define AD7605_CHANNEL(num) \ - AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW), \ - BIT(IIO_CHAN_INFO_SCALE), 0, 0, 0, 16) - -#define AD7606_CHANNEL(num, bits) \ - AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW), \ - BIT(IIO_CHAN_INFO_SCALE), \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ - 0, 0, bits) - -#define AD7616_CHANNEL(num) AD7606_SW_CHANNEL(num, 16) - -#define AD7606_BI_CHANNEL(num) \ - AD760X_CHANNEL(num, 0, \ - BIT(IIO_CHAN_INFO_SCALE), \ - BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ - 0, 0, 16) - -#define AD7606_BI_SW_CHANNEL(num) \ - AD760X_CHANNEL(num, \ - /* mask separate */ \ - BIT(IIO_CHAN_INFO_SCALE), \ - /* mask type */ \ - 0, \ - /* mask all */ \ - BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ - /* mask separate available */ \ - BIT(IIO_CHAN_INFO_SCALE), \ - /* mask all available */ \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ - 16) - struct ad7606_state; typedef int (*ad7606_scale_setup_cb_t)(struct iio_dev *indio_dev, @@ -118,10 +48,9 @@ typedef int (*ad7606_sw_setup_cb_t)(struct iio_dev *indio_dev); /** * struct ad7606_chip_info - chip specific information - * @channels: channel specification * @max_samplerate: maximum supported sample rate * @name: device name - * @num_channels: number of channels + * @bits: data width in bits * @num_adc_channels: the number of channels the ADC actually inputs. * @scale_setup_cb: callback to setup the scales for each channel * @sw_setup_cb: callback to setup the software mode if available. @@ -133,11 +62,10 @@ typedef int (*ad7606_sw_setup_cb_t)(struct iio_dev *indio_dev); * after a restart */ struct ad7606_chip_info { - const struct iio_chan_spec *channels; unsigned int max_samplerate; const char *name; + unsigned int bits; unsigned int num_adc_channels; - unsigned int num_channels; ad7606_scale_setup_cb_t scale_setup_cb; ad7606_sw_setup_cb_t sw_setup_cb; const unsigned int *oversampling_avail; diff --git a/drivers/iio/adc/ad7606_par.c b/drivers/iio/adc/ad7606_par.c index 335fb481bfde15b79331eabdcbc970d70880338c..e33b07ab5eace4b78e7cf39ee7e8d9379c9f73e7 100644 --- a/drivers/iio/adc/ad7606_par.c +++ b/drivers/iio/adc/ad7606_par.c @@ -21,28 +21,6 @@ #include "ad7606.h" #include "ad7606_bus_iface.h" -static const struct iio_chan_spec ad7606b_bi_channels[] = { - AD7606_BI_CHANNEL(0), - AD7606_BI_CHANNEL(1), - AD7606_BI_CHANNEL(2), - AD7606_BI_CHANNEL(3), - AD7606_BI_CHANNEL(4), - AD7606_BI_CHANNEL(5), - AD7606_BI_CHANNEL(6), - AD7606_BI_CHANNEL(7), -}; - -static const struct iio_chan_spec ad7606b_bi_sw_channels[] = { - AD7606_BI_SW_CHANNEL(0), - AD7606_BI_SW_CHANNEL(1), - AD7606_BI_SW_CHANNEL(2), - AD7606_BI_SW_CHANNEL(3), - AD7606_BI_SW_CHANNEL(4), - AD7606_BI_SW_CHANNEL(5), - AD7606_BI_SW_CHANNEL(6), - AD7606_BI_SW_CHANNEL(7), -}; - static int ad7606_par_bus_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { @@ -94,9 +72,6 @@ static int ad7606_par_bus_setup_iio_backend(struct device *dev, return ret; } - indio_dev->channels = ad7606b_bi_channels; - indio_dev->num_channels = 8; - return 0; } @@ -120,19 +95,11 @@ static int ad7606_par_bus_reg_write(struct ad7606_state *st, unsigned int addr, return pdata->bus_reg_write(st->back, addr, val); } -static int ad7606_par_bus_sw_mode_config(struct iio_dev *indio_dev) -{ - indio_dev->channels = ad7606b_bi_sw_channels; - - return 0; -} - static const struct ad7606_bus_ops ad7606_bi_bops = { .iio_backend_config = ad7606_par_bus_setup_iio_backend, .update_scan_mode = ad7606_par_bus_update_scan_mode, .reg_read = ad7606_par_bus_reg_read, .reg_write = ad7606_par_bus_reg_write, - .sw_mode_config = ad7606_par_bus_sw_mode_config, }; static int ad7606_par16_read_block(struct device *dev, diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c index 1abaf8626206cb30e532cf9f82e0d050706aa1e0..b2b975fb7fea4d1af6caef59e75ca495501bc140 100644 --- a/drivers/iio/adc/ad7606_spi.c +++ b/drivers/iio/adc/ad7606_spi.c @@ -15,50 +15,6 @@ #define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */ -static const struct iio_chan_spec ad7616_sw_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(16), - AD7616_CHANNEL(0), - AD7616_CHANNEL(1), - AD7616_CHANNEL(2), - AD7616_CHANNEL(3), - AD7616_CHANNEL(4), - AD7616_CHANNEL(5), - AD7616_CHANNEL(6), - AD7616_CHANNEL(7), - AD7616_CHANNEL(8), - AD7616_CHANNEL(9), - AD7616_CHANNEL(10), - AD7616_CHANNEL(11), - AD7616_CHANNEL(12), - AD7616_CHANNEL(13), - AD7616_CHANNEL(14), - AD7616_CHANNEL(15), -}; - -static const struct iio_chan_spec ad7606b_sw_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(8), - AD7606_SW_CHANNEL(0, 16), - AD7606_SW_CHANNEL(1, 16), - AD7606_SW_CHANNEL(2, 16), - AD7606_SW_CHANNEL(3, 16), - AD7606_SW_CHANNEL(4, 16), - AD7606_SW_CHANNEL(5, 16), - AD7606_SW_CHANNEL(6, 16), - AD7606_SW_CHANNEL(7, 16), -}; - -static const struct iio_chan_spec ad7606c_18_sw_channels[] = { - IIO_CHAN_SOFT_TIMESTAMP(8), - AD7606_SW_CHANNEL(0, 18), - AD7606_SW_CHANNEL(1, 18), - AD7606_SW_CHANNEL(2, 18), - AD7606_SW_CHANNEL(3, 18), - AD7606_SW_CHANNEL(4, 18), - AD7606_SW_CHANNEL(5, 18), - AD7606_SW_CHANNEL(6, 18), - AD7606_SW_CHANNEL(7, 18), -}; - static u16 ad7616_spi_rd_wr_cmd(int addr, char is_write_op) { /* @@ -160,48 +116,13 @@ static int ad7606_spi_reg_write(struct ad7606_state *st, return spi_write(spi, &st->d16[0], sizeof(st->d16[0])); } -static int ad7616_sw_mode_config(struct iio_dev *indio_dev) -{ - /* - * Scale can be configured individually for each channel - * in software mode. - */ - indio_dev->channels = ad7616_sw_channels; - - return 0; -} - static int ad7606b_sw_mode_config(struct iio_dev *indio_dev) { struct ad7606_state *st = iio_priv(indio_dev); - int ret; /* Configure device spi to output on a single channel */ - ret = st->bops->reg_write(st, AD7606_CONFIGURATION_REGISTER, - AD7606_SINGLE_DOUT); - if (ret) - return ret; - - /* - * Scale can be configured individually for each channel - * in software mode. - */ - indio_dev->channels = ad7606b_sw_channels; - - return 0; -} - -static int ad7606c_18_sw_mode_config(struct iio_dev *indio_dev) -{ - int ret; - - ret = ad7606b_sw_mode_config(indio_dev); - if (ret) - return ret; - - indio_dev->channels = ad7606c_18_sw_channels; - - return 0; + return st->bops->reg_write(st, AD7606_CONFIGURATION_REGISTER, + AD7606_SINGLE_DOUT); } static const struct ad7606_bus_ops ad7606_spi_bops = { @@ -221,7 +142,6 @@ static const struct ad7606_bus_ops ad7616_spi_bops = { .reg_read = ad7606_spi_reg_read, .reg_write = ad7606_spi_reg_write, .rd_wr_cmd = ad7616_spi_rd_wr_cmd, - .sw_mode_config = ad7616_sw_mode_config, }; static const struct ad7606_bus_ops ad7606b_spi_bops = { @@ -237,7 +157,7 @@ static const struct ad7606_bus_ops ad7606c_18_spi_bops = { .reg_read = ad7606_spi_reg_read, .reg_write = ad7606_spi_reg_write, .rd_wr_cmd = ad7606b_spi_rd_wr_cmd, - .sw_mode_config = ad7606c_18_sw_mode_config, + .sw_mode_config = ad7606b_sw_mode_config, }; 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Signed-off-by: David Lechner --- drivers/iio/adc/ad7606_par.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/iio/adc/ad7606_par.c b/drivers/iio/adc/ad7606_par.c index e33b07ab5eace4b78e7cf39ee7e8d9379c9f73e7..634852c4bbd2c531d6c0e02d2f1e62db9008cad9 100644 --- a/drivers/iio/adc/ad7606_par.c +++ b/drivers/iio/adc/ad7606_par.c @@ -222,6 +222,8 @@ static const struct platform_device_id ad7606_driver_ids[] = { { .name = "ad7606-6", .driver_data = (kernel_ulong_t)&ad7606_6_info, }, { .name = "ad7606-8", .driver_data = (kernel_ulong_t)&ad7606_8_info, }, { .name = "ad7606b", .driver_data = (kernel_ulong_t)&ad7606b_info, }, + { .name = "ad7606c-16", .driver_data = (kernel_ulong_t)&ad7606c_16_info }, + { .name = "ad7606c-18", .driver_data = (kernel_ulong_t)&ad7606c_18_info }, { .name = "ad7607", .driver_data = (kernel_ulong_t)&ad7607_info, }, { .name = "ad7608", .driver_data = (kernel_ulong_t)&ad7608_info, }, { .name = "ad7609", .driver_data = (kernel_ulong_t)&ad7609_info, }, @@ -235,6 +237,8 @@ static const struct of_device_id ad7606_of_match[] = { { .compatible = "adi,ad7606-6", .data = &ad7606_6_info }, { .compatible = "adi,ad7606-8", .data = &ad7606_8_info }, { .compatible = "adi,ad7606b", .data = &ad7606b_info }, + { .compatible = "adi,ad7606c-16", .data = &ad7606c_16_info }, + { .compatible = "adi,ad7606c-18", .data = &ad7606c_18_info }, { .compatible = "adi,ad7607", .data = &ad7607_info }, { .compatible = "adi,ad7608", .data = &ad7608_info }, { .compatible = "adi,ad7609", .data = &ad7609_info },