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| author | Anshul Dalal <anshulusr@gmail.com> | 2023-12-20 16:19:53 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-12-21 18:04:42 +0100 |
| commit | cdf3ecb0d8d0a83c940a8892b3e8aeaf35dc4353 (patch) | |
| tree | b0c4b0389777ab1fd8682e94c2b5a9e72a879901 /MAINTAINERS | |
| parent | dt-bindings: iio: dac: add MCP4821 (diff) | |
| download | linux-cdf3ecb0d8d0a83c940a8892b3e8aeaf35dc4353.tar.xz linux-cdf3ecb0d8d0a83c940a8892b3e8aeaf35dc4353.zip | |
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 <anshulusr@gmail.com>
Link: https://lore.kernel.org/r/20231220151954.154595-2-anshulusr@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 066707fddd90..f61df0128c0b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13174,6 +13174,13 @@ F: Documentation/ABI/testing/sysfs-bus-iio-potentiometer-mcp4531 F: drivers/iio/potentiometer/mcp4018.c F: drivers/iio/potentiometer/mcp4531.c +MCP4821 DAC DRIVER +M: Anshul Dalal <anshulusr@gmail.com> +L: linux-iio@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/iio/dac/microchip,mcp4821.yaml +F: drivers/iio/dac/mcp4821.c + MCR20A IEEE-802.15.4 RADIO DRIVER M: Stefan Schmidt <stefan@datenfreihafen.org> L: linux-wpan@vger.kernel.org |