- 30 Jun, 2024 4 commits
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Paul Cercueil authored
Add the necessary infrastructure to the IIO core to support a new optional DMABUF based interface. With this new interface, DMABUF objects (externally created) can be attached to a IIO buffer, and subsequently used for data transfer. A userspace application can then use this interface to share DMABUF objects between several interfaces, allowing it to transfer data in a zero-copy fashion, for instance between IIO and the USB stack. The userspace application can also memory-map the DMABUF objects, and access the sample data directly. The advantage of doing this vs. the read() interface is that it avoids an extra copy of the data between the kernel and userspace. This is particularly userful for high-speed devices which produce several megabytes or even gigabytes of data per second. As part of the interface, 3 new IOCTLs have been added: IIO_BUFFER_DMABUF_ATTACH_IOCTL(int fd): Attach the DMABUF object identified by the given file descriptor to the buffer. IIO_BUFFER_DMABUF_DETACH_IOCTL(int fd): Detach the DMABUF object identified by the given file descriptor from the buffer. Note that closing the IIO buffer's file descriptor will automatically detach all previously attached DMABUF objects. IIO_BUFFER_DMABUF_ENQUEUE_IOCTL(struct iio_dmabuf *): Request a data transfer to/from the given DMABUF object. Its file descriptor, as well as the transfer size and flags are provided in the "iio_dmabuf" structure. These three IOCTLs have to be performed on the IIO buffer's file descriptor, obtained using the IIO_BUFFER_GET_FD_IOCTL() ioctl. Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Co-developed-by:
Nuno Sa <nuno.sa@analog.com> Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Jonathan Cameron authored
Dmaengine topic - New device_prep_peripheral_dma_vec, documentation and user
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Alisa-Dariana Roman authored
Alexandru Tachici has not been active. Also the email address included is not reachable anymore. I was assigned to work on the driver instead. Remove Alexandru Tachici and add myself as maintainer of AD7192 driver. Signed-off-by:
Alisa-Dariana Roman <alisa.roman@analog.com> Reviewed-by:
Conor Dooley <conor.dooley@microchip.com> Link: https://patch.msgid.link/20240624124941.113010-7-alisa.roman@analog.comSigned-off-by:
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David Lechner authored
This makes use of the new devm_regulator_get_enable_read_voltage() function to reduce boilerplate code. Error messages have changed slightly since there are now fewer places where we print an error. The rest of the logic of selecting which supply to use as the reference voltage remains the same. Also 1000 is replaced by MILLI in a few places for consistency. Signed-off-by:
David Lechner <dlechner@baylibre.com> Signed-off-by:
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- 29 Jun, 2024 4 commits
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Kaustabh Chakraborty authored
Hard matching against the WhoAmI values isn't ideal for using devices which are compatible with existing ones. Instead of raising an error, issue a warning instead, thus allowing the driver to continue probing. Suggested-by:
Jonathan Cameron <jic23@kernel.org> Signed-off-by:
Kaustabh Chakraborty <kauschluss@disroot.org> Link: https://patch.msgid.link/20240625082800.62305-1-kauschluss@disroot.orgSigned-off-by:
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Subhajit Ghosh authored
Add myself as maintainer of APDS9306 ambient light sensor driver. Signed-off-by:
Subhajit Ghosh <subhajit.ghosh@tweaklogic.com> Link: https://patch.msgid.link/20240626135231.8937-1-subhajit.ghosh@tweaklogic.comSigned-off-by:
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Guillaume Stols authored
AD7606-8 is referred to as AD7606 by Analog Devices. This comment aims to avoid confusion. Also the compatible names were not sorted by alphabetical order. Signed-off-by:
Guillaume Stols <gstols@baylibre.com> Acked-by:
Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20240628-cleanup-ad7606-v2-2-96e02f90256d@baylibre.comSigned-off-by:
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Guillaume Stols authored
Add AD7606-5 datasheet link. Signed-off-by:
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- 28 Jun, 2024 4 commits
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Sean Anderson authored
Add labels from IIO channels to our channels. This allows userspace to display more meaningful names instead of "in0" or "temp5". Although lm-sensors gracefully handles errors when reading channel labels, the ABI says the label attribute > Should only be created if the driver has hints about what this voltage > channel is being used for, and user-space doesn't. Therefore, we test to see if the channel has a label before creating the attribute. Signed-off-by:
Sean Anderson <sean.anderson@linux.dev> Acked-by:
Guenter Roeck <linux@roeck-us.net> Link: https://patch.msgid.link/20240624174601.1527244-3-sean.anderson@linux.devSigned-off-by:
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Sean Anderson authored
It can be convenient for other in-kernel drivers to reuse IIO channel labels. Export the iio_read_channel_label function to allow this. The signature is different depending on where we are calling it from, so the meat is moved to do_iio_read_channel_label. Signed-off-by:
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Jonathan Cameron authored
Picked up by sparse. Cc: Liam Beguin <liambeguin@gmail.com> Reviewed-by:
Liam Beguin <liambeguin@gmail.com> Link: https://patch.msgid.link/20240624193210.347434-1-jic23@kernel.orgSigned-off-by:
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Olivier Moysan authored
Fix warnings on DFSDM dtbs check Unevaluated properties are not allowed ('dfsdm-dai' was unexpected) 'port' does not match any of the regexes: 'pinctrl-[0-9]+' Fixes: 11183ac0 ("dt-bindings: stm32: convert dfsdm to json-schema") Signed-off-by:Olivier Moysan <olivier.moysan@foss.st.com> Acked-by:
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- 25 Jun, 2024 28 commits
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David Lechner authored
Use devm_regulator_get_enable_read_voltage() to simplify the code. Error message is slightly changed since there is only one error return now. Signed-off-by:
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David Lechner authored
By using a few devm_ functions, we can simplify the driver and remove the ads8688_remove() function. spi_set_drvdata() is removed since there are no more callers of spi_get_drvdata(). Also use dev_err_probe() to simplify error return. Signed-off-by:
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David Lechner authored
Use devm_regulator_get_enable_read_voltage() to simplify the code. Signed-off-by:
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David Lechner authored
Use devm_regulator_get_enable_read_voltage() to simplify the code. Signed-off-by:
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David Lechner authored
Use devm_regulator_get_enable_read_voltage() to simplify the code. Signed-off-by:
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David Lechner authored
Use devm_regulator_get_enable_read_voltage() to simplify the code. Error message is changed since there is only one error return now. LTC2309_INTERNAL_REF_MV macro is added to make the internal reference voltage value self-documenting. Signed-off-by:
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David Lechner authored
Use dev_err_probe() to simplify error returns in the probe function. Signed-off-by:
Andreas Klinger <ak@it-klinger.de> Link: https://patch.msgid.link/20240621-iio-regulator-refactor-round-2-v1-4-49e50cd0b99a@baylibre.comSigned-off-by:
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David Lechner authored
By using a few more devm_ functions, we can remove the hx711_remove() function in the hx711 driver. platform_set_drvdata() is also removed since there are no more callers of platform_get_drvdata(). Signed-off-by:
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David Lechner authored
Use the devm_regulator_get_enable_read_voltage() helper to simplify the code. Signed-off-by:
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David Lechner authored
This makes use of the devm_regulator_get_enable_read_voltage() helper function to simplify the code. The error return is moved closer to the function call to make it easier to follow the logic. And a few blank lines are added for readability. Signed-off-by:
Andrew Jeffery <andrew@codeconstruct.com.au> Link: https://patch.msgid.link/20240621-iio-regulator-refactor-round-2-v1-1-49e50cd0b99a@baylibre.comSigned-off-by:
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Nuno Sa authored
Since all users were converted to the new cleanup based helper, adis_dev_lock() and adis_dev_unlock() can now be removed from the lib. Signed-off-by:
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Nuno Sa authored
Use the new auto cleanup based locks so error paths are simpler. Signed-off-by:
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Nuno Sa authored
Use the new auto cleanup based locks so error paths are simpler. Signed-off-by:
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Nuno Sa authored
Use the new auto cleanup based locks so error paths are simpler. While at it, removed 'ret' from adis16400_write_raw() by doing return adis_write_reg_16(); instead of ret = adis_write_reg_16(); return ret; Signed-off-by:
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Nuno Sa authored
Use the new auto cleanup based locks so error paths are simpler. While at it, reduce a bit the scope of the lock as we did not needed it protecting all the data in the switch() branch. Signed-off-by:
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Nuno Sa authored
Use the new auto cleanup based locks so error paths are simpler. While at it, turned a sprintf() call into sysfs_emit(). Signed-off-by:
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Nuno Sa authored
Add two new lock helpers that make use of the cleanup guard() and scoped_guard() macros. Thus, users won't have to worry about unlocking which is less prone to errors and allows for simpler error paths. Signed-off-by:
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Nuno Sa authored
This makes locking and handling error paths simpler. Signed-off-by:
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Nuno Sa authored
Split trigger handling for devices that have paging and need to select the correct page to get the data. Although this actually introduces more LOC, it makes the code and the locking clear. It will also make the following move to the cleanup magic cleaner. Signed-off-by:
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Kaustabh Chakraborty authored
LIS2DS12 is an accelerometer by STMicroelectronics. It is identifiable by its WhoAmI value 0x43. Its register interface is not compatible with existing parts. For example: - The full-scale values are present in register 0x20, in bits 2 and 3 (mask 0x0c). Most other supported sensors have the register address set to 0x21, 0x23, 0x24, or 0x25. There is one sensor setting though (bearing WhoAmI 0x3b) which has it's address set to 0x20, but the mask is set to 0x20, not 0x0c. - The full-scale values 2G, 4G, 8G, and 16G correspond to the register values 0x00, 0x02, 0x03, 0x01 respectively. None of the sensor settings have the value 0x01 associated with 16G. Add the compatible string without any fallback. Signed-off-by:
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Kaustabh Chakraborty authored
Define sensor settings for LIS2DS12 by STMicroelectronics (WhoAmI 0x43) and add support in the I2C and SPI drivers. Datasheet: https://www.st.com/resource/en/datasheet/lis2ds12.pdfSigned-off-by:
Linus Walleij <linus.walleij@linaro.org> Link: https://patch.msgid.link/20240622123520.39253-1-kauschluss@disroot.orgSigned-off-by:
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Antoniu Miclaus authored
Add clk provider feature for the adf4350. Even though the driver was sent as an IIO driver in most cases the device is actually seen as a clock provider. This patch aims to cover actual usecases requested by users in order to completely control the output frequencies from userspace. Signed-off-by:
Antoniu Miclaus <antoniu.miclaus@analog.com> Reviewed-by:
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Antoniu Miclaus authored
Add properties required for providing clock to other consumers. Signed-off-by:
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João Paulo Gonçalves authored
The ADS1119 is a precision, 16-bit, analog-to-digital converter (ADC) that features two differential or four single-ended inputs through a flexible input multiplexer (MUX), rail-to-rail input buffers, a programmable gain stage, a voltage reference, and an oscillator. Apart from normal single conversion, the driver also supports continuous conversion mode using a triggered buffer. However, in this mode only one channel can be scanned at a time. Datasheet: https://www.ti.com/lit/gpn/ads1119Signed-off-by:
João Paulo Gonçalves <joao.goncalves@toradex.com> Signed-off-by:
Francesco Dolcini <francesco.dolcini@toradex.com> Link: https://patch.msgid.link/20240617183905.4685-1-francesco@dolcini.itSigned-off-by:
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João Paulo Gonçalves authored
Add devicetree bindings for Texas Instruments ADS1119 16-bit ADC with I2C interface. Datasheet: https://www.ti.com/lit/gpn/ads1119Signed-off-by:
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Trevor Gamblin authored
The current error handling for calls such as devm_clk_get_enabled() in the adi-axi-dac probe() function means that, if a property such as 'clocks' (for example) is not present in the devicetree when booting a kernel with the driver enabled, the resulting error message will be vague, e.g.: |adi_axi_dac 44a00000.dac: probe with driver adi_axi_dac failed with error -2 Change the devm_clk_get_enabled(), devm_regmap_init_mmio(), and devm_iio_backend_register() checks to use dev_err_probe() with some context for easier debugging. After the change: |adi_axi_dac 44a00000.dac: error -ENOENT: failed to get clock |adi_axi_dac 44a00000.dac: probe with driver adi_axi_dac failed with error -2 Suggested-by:
Angelo Dureghello <adureghello@baylibre.com> Signed-off-by:
Trevor Gamblin <tgamblin@baylibre.com> Link: https://patch.msgid.link/20240617151820.3337034-1-tgamblin@baylibre.comSigned-off-by:
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Trevor Gamblin authored
Instead of using regmap_update_bits() and passing the mask twice, use regmap_set_bits(). Instead of using regmap_update_bits() and passing val = 0, use regmap_clear_bits(). Suggested-by:
Uwe Kleine-König <u.kleine-koenig@baylibre.com> Signed-off-by:
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Trevor Gamblin authored
Instead of using regmap_update_bits() and passing val = 0, use regmap_clear_bits(). Suggested-by:
Crt Mori <cmo@melexis.com> Signed-off-by:
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