iio: dac: ad5791: Add offload support

Add SPI offload support to stream TX buffers using DMA.
This allows loading samples to the DAC with a rate of 1 MSPS.

Signed-off-by: Axel Haslam <ahaslam@bayli

iio: dac: ad5791: Add offload support

Add SPI offload support to stream TX buffers using DMA.
This allows loading samples to the DAC with a rate of 1 MSPS.

Signed-off-by: Axel Haslam <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Nuno Sa <[email protected]>
Signed-off-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-17-e48a489be48c@baylibre.com
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: Support ROHM BD79703 DAC

The ROHM BD79703 is a 6 channel digital to analog converter.

Based on the data-sheet examples the hardware would support setting the
DAC word without changing the

iio: dac: Support ROHM BD79703 DAC

The ROHM BD79703 is a 6 channel digital to analog converter.

Based on the data-sheet examples the hardware would support setting the
DAC word without changing the actual output. The data-sheet is not too
specific on how the enabling the output of new voltage set by DAC
should be done - hence this is not implemented by the driver.

The BD79703 would also support two specific "PULL_DOWN" modes. These
aren't currently supported by the driver either.

Add a very basic support for controlling the channel outputs one-by-one.

Signed-off-by: Matti Vaittinen <[email protected]>
Link: https://patch.msgid.link/bc77d7b979ca28408a216f597082fcd94ec63be7.1734608215.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: Fix converters spelling typo.

Correct the converters typo error

"convertors" => "converters"

Signed-off-by: Karan Sanghavi <[email protected]>
Link: https://patch.msgid.link/20241

iio: dac: Fix converters spelling typo.

Correct the converters typo error

"convertors" => "converters"

Signed-off-by: Karan Sanghavi <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ad3552r: add high-speed platform driver

Add High Speed ad3552r platform driver.

The ad3552r DAC is controlled by a custom (fpga-based) DAC IP
through the current AXI backend, or similar a

iio: dac: ad3552r: add high-speed platform driver

Add High Speed ad3552r platform driver.

The ad3552r DAC is controlled by a custom (fpga-based) DAC IP
through the current AXI backend, or similar alternative IIO backend.

Compared to the existing driver (ad3552r.c), that is a simple SPI
driver, this driver is coupled with a DAC IIO backend that finally
controls the ad3552r by a fpga-based "QSPI+DDR" interface, to reach
maximum transfer rate of 33MUPS using dma stream capabilities.

All commands involving QSPI bus read/write are delegated to the backend
through the provided APIs for bus read/write.

Reviewed-by: Nuno Sa <[email protected]>
Signed-off-by: Angelo Dureghello <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20241028-wip-bl-ad3552r-axi-v0-iio-testing-v9-7-f6960b4f9719@kernel-space.org
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: Kconfig: Fix build error for ltc2664

If REGMAP_SPI is n and LTC2664 is y, the following build error occurs:

riscv64-unknown-linux-gnu-ld: drivers/iio/dac/ltc2664.o: in function `ltc2664_

iio: dac: Kconfig: Fix build error for ltc2664

If REGMAP_SPI is n and LTC2664 is y, the following build error occurs:

riscv64-unknown-linux-gnu-ld: drivers/iio/dac/ltc2664.o: in function `ltc2664_probe':
ltc2664.c:(.text+0x714): undefined reference to `__devm_regmap_init_spi'

Select REGMAP_SPI instead of REGMAP for LTC2664 to fix it.

Fixes: 4cc2fc445d2e ("iio: dac: ltc2664: Add driver for LTC2664 and LTC2672")
Reviewed-by: Nuno Sa <[email protected]>
Signed-off-by: Jinjie Ruan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: stm32-dac-core: add missing select REGMAP_MMIO in Kconfig

This driver makes use of regmap_mmio, but does not select the required
module.
Add the missing 'select REGMAP_MMIO'.

Fixes: 4d4b3

iio: dac: stm32-dac-core: add missing select REGMAP_MMIO in Kconfig

This driver makes use of regmap_mmio, but does not select the required
module.
Add the missing 'select REGMAP_MMIO'.

Fixes: 4d4b30526eb8 ("iio: dac: add support for stm32 DAC")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ltc1660: add missing select REGMAP_SPI in Kconfig

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: 8316cebd1e59 ("

iio: dac: ltc1660: add missing select REGMAP_SPI in Kconfig

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: 8316cebd1e59 ("iio: dac: add support for ltc1660")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ad5770r: add missing select REGMAP_SPI in Kconfig

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: cbbb819837f6 ("

iio: dac: ad5770r: add missing select REGMAP_SPI in Kconfig

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: cbbb819837f6 ("iio: dac: ad5770r: Add AD5770R support")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ad5766: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and

iio: dac: ad5766: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 885b9790c25a ("drivers:iio:dac:ad5766.c: Add trigger buffer")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ad3552r: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and

iio: dac: ad3552r: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig

This driver makes use of triggered buffers, but does not select the
required modules.

Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.

Fixes: 8f2b54824b28 ("drivers:iio:dac: Add AD3552R driver support")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: support the ad8460 Waveform DAC

The AD8460 is a “bits in, power out” high voltage, high-power,
high-speed driver optimized for large output current (up to ±1 A)
and high slew rate (up to ±

iio: dac: support the ad8460 Waveform DAC

The AD8460 is a “bits in, power out” high voltage, high-power,
high-speed driver optimized for large output current (up to ±1 A)
and high slew rate (up to ±1800 V/μs) at high voltage (up to ±40 V)
into capacitive loads.

A digital engine implements user-configurable features: modes for
digital input, programmable supply current, and fault monitoring
and programmable protection settings for output current,
output voltage, and junction temperature. The AD8460 operates on
high voltage dual supplies up to ±55 V and a single low voltage
supply of 5 V.

Signed-off-by: Mariel Tinaco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ltc2664: Add driver for LTC2664 and LTC2672

LTC2664 4 channel, 12-/16-Bit Voltage Output SoftSpan DAC
LTC2672 5 channel, 12-/16-Bit Current Output Softspan DAC

Reviewed-by: Nuno Sa <nuno.

iio: dac: ltc2664: Add driver for LTC2664 and LTC2672

LTC2664 4 channel, 12-/16-Bit Voltage Output SoftSpan DAC
LTC2672 5 channel, 12-/16-Bit Current Output Softspan DAC

Reviewed-by: Nuno Sa <[email protected]>
Co-developed-by: Michael Hennerich <[email protected]>
Signed-off-by: Michael Hennerich <[email protected]>
Signed-off-by: Kim Seer Paller <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: fix ad9739a random config compile error

WARNING: unmet direct dependencies detected for REGMAP_SPI
Depends on [n]: SPI [=n]
Selected by [m]:
- AD9739A [=m] && IIO [=m] && (SPI [=n] |

iio: dac: fix ad9739a random config compile error

WARNING: unmet direct dependencies detected for REGMAP_SPI
Depends on [n]: SPI [=n]
Selected by [m]:
- AD9739A [=m] && IIO [=m] && (SPI [=n] || COMPILE_TEST [=y])
...
ERROR: modpost: "spi_write_then_read" [drivers/base/regmap/regmap-spi.ko] undefined!
ERROR: modpost: "spi_async" [drivers/base/regmap/regmap-spi.ko] undefined!
ERROR: modpost: "spi_sync" [drivers/base/regmap/regmap-spi.ko] undefined!
ERROR: modpost: "__spi_register_driver" [drivers/iio/dac/ad9739a.ko] undefined!

Fixes: e77603d5468b ("iio: dac: support the ad9739a RF DAC")
Reported-by: k2ci <[email protected]>
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Ke Sun <[email protected]>
Reviewed-by: Nuno Sa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: adi-axi-dac: add platform dependencies

Being this device a soft core, it's only supported on some/specific
platforms. Hence add proper dependencies for the supported platforms.
Also add CO

iio: dac: adi-axi-dac: add platform dependencies

Being this device a soft core, it's only supported on some/specific
platforms. Hence add proper dependencies for the supported platforms.
Also add COMPILE_TEST to increase the build coverage.

Signed-off-by: Nuno Sa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: support the ad9739a RF DAC

The AD9739A is a 14-bit, 2.5 GSPS high performance RF DACs that are capable
of synthesizing wideband signals from DC up to 3 GHz.

A dual-port, source synchronou

iio: dac: support the ad9739a RF DAC

The AD9739A is a 14-bit, 2.5 GSPS high performance RF DACs that are capable
of synthesizing wideband signals from DC up to 3 GHz.

A dual-port, source synchronous, LVDS interface simplifies the digital
interface with existing FGPA/ASIC technology. On-chip controllers are used
to manage external and internal clock domain variations over temperature to
ensure reliable data transfer from the host to the DAC core.

Co-developed-by: Dragos Bogdan <[email protected]>
Signed-off-by: Dragos Bogdan <[email protected]>
Signed-off-by: Nuno Sa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: add support for AXI DAC IP core

Support the Analog Devices Generic AXI DAC IP core. The IP core is used
for interfacing with digital-to-analog (DAC) converters that require either
a high-s

iio: dac: add support for AXI DAC IP core

Support the Analog Devices Generic AXI DAC IP core. The IP core is used
for interfacing with digital-to-analog (DAC) converters that require either
a high-speed serial interface (JESD204B/C) or a source synchronous parallel
interface (LVDS/CMOS). Typically (for such devices) SPI will be used for
configuration only, while this IP core handles the streaming of data into
memory via DMA.

Signed-off-by: Nuno Sa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: driver for MCP4821

Adds driver for the MCP48xx series of DACs.

Device uses a simplex SPI channel. To set the value of an output channel,
a 16-bit data of following format must be written:

iio: dac: driver for MCP4821

Adds driver for the MCP48xx series of DACs.

Device uses a simplex SPI channel. To set the value of an output channel,
a 16-bit data of following format must be written:

Bit field | Description
15 [MSB] | Channel selection bit
0 -> Channel A
1 -> Channel B
13 | Output Gain Selection bit
0 -> 2x Gain (Vref = 4.096V)
1 -> 1x Gain (Vref = 2.048V)
12 | Output Shutdown Control bit
0 -> Shutdown the selected channel
1 -> Active mode operation
11-0 [LSB]| DAC Input Data bits
Value's big endian representation is taken as input for the
selected DAC channel. For devices with a resolution of less
than 12-bits, only the x most significant bits are considered
where x is the resolution of the device.
Reference: Page#22 [MCP48x2 Datasheet]

Supported devices:
+---------+--------------+-------------+
| Device | Resolution | Channels |
|---------|--------------|-------------|
| MCP4801 | 8-bit | 1 |
| MCP4802 | 8-bit | 2 |
| MCP4811 | 10-bit | 1 |
| MCP4812 | 10-bit | 2 |
| MCP4821 | 12-bit | 1 |
| MCP4822 | 12-bit | 2 |
+---------+--------------+-------------+

Devices tested:
MCP4821 [12-bit single channel]
MCP4802 [8-bit dual channel]

Tested on Raspberry Pi Zero 2W

Datasheet: https://ww1.microchip.com/downloads/en/DeviceDoc/22244B.pdf #MCP48x1
Datasheet: https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf #MCP48x2
Signed-off-by: Anshul Dalal <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: add MCP4728 I2C DAC driver

MCP4728 is a 12-bit quad channel DAC with I2C interface.

support for:
* per-channel gain
* per-channel power state
* per-channel power down mode control
* per-ch

iio: add MCP4728 I2C DAC driver

MCP4728 is a 12-bit quad channel DAC with I2C interface.

support for:
* per-channel gain
* per-channel power state
* per-channel power down mode control
* per-channel vref selection internal/vdd
* store current state to on-chip EEPROM

Signed-off-by: Andrea Collamati <[email protected]>
Link: https://lore.kernel.org/r/a0933003ed3c855f9d80d6ce0a40add2b6f0ba36.1691066050.git.andrea.collamati@gmail.com
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: cio-dac: Migrate to the regmap API

The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly in

iio: dac: cio-dac: Migrate to the regmap API

The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly in the driver.

Includes trivial header inclusion tidy up.

Suggested-by: Andy Shevchenko <[email protected]>
Signed-off-by: William Breathitt Gray <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: add support for max5522

Add initial support for DAC max5522.

Tested writing DAC A and B with some values,
from 0 to 1023, measured output voltages, driver works properly.

Additions for m

iio: dac: add support for max5522

Add initial support for DAC max5522.

Tested writing DAC A and B with some values,
from 0 to 1023, measured output voltages, driver works properly.

Additions for max5523/24/25 will follow.

Signed-off-by: Angelo Dureghello <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ad5686: Add support for AD5337

AD5337 belongs to the same family as the AD5338.

The difference is that the AD5337 has 8-bit precision instead of 10-bit.

Add support for the AD5337 chip i

iio: dac: ad5686: Add support for AD5337

AD5337 belongs to the same family as the AD5338.

The difference is that the AD5337 has 8-bit precision instead of 10-bit.

Add support for the AD5337 chip in the driver.

Signed-off-by: Fabio Estevam <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: ti-dac5571: add support for ti,dac121c081

It fits right in as a single 12-bit DAC.

Reviewed-by: Sean Nyekjaer <[email protected]>
Signed-off-by: Peter Rosin <[email protected]>
Link: https://

iio: dac: ti-dac5571: add support for ti,dac121c081

It fits right in as a single 12-bit DAC.

Reviewed-by: Sean Nyekjaer <[email protected]>
Signed-off-by: Peter Rosin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: dpot: Drop dependency on OF

Nothing in this driver depends on OF firmware so drop the dependency
to remove the false impression such a dependency exists.

Signed-off-by: Andy Shevchenko <a

iio: dac: dpot: Drop dependency on OF

Nothing in this driver depends on OF firmware so drop the dependency
to remove the false impression such a dependency exists.

Signed-off-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: lpc18xx: Drop dependency on OF

Nothing in this driver depends on OF firmware so drop the dependency
to remove the false impression such a dependency exists.

Signed-off-by: Andy Shevchenko

iio: dac: lpc18xx: Drop dependency on OF

Nothing in this driver depends on OF firmware so drop the dependency
to remove the false impression such a dependency exists.

Signed-off-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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iio: dac: vf610: Drop dependency on OF

Nothing in this driver depends on OF firmware so drop the dependency
to remove the false impression such a dependency exists.

Signed-off-by: Andy Shevchenko <

iio: dac: vf610: Drop dependency on OF

Nothing in this driver depends on OF firmware so drop the dependency
to remove the false impression such a dependency exists.

Signed-off-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Cameron <[email protected]>

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