mirror of
https://github.com/torvalds/linux.git
synced 2026-09-21 12:20:02 +02:00
cdf3ecb0d8
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>
|
||
|---|---|---|
| .. | ||
| ad3552r.c | ||
| ad5064.c | ||
| ad5360.c | ||
| ad5380.c | ||
| ad5421.c | ||
| ad5446.c | ||
| ad5449.c | ||
| ad5504.c | ||
| ad5592r-base.c | ||
| ad5592r-base.h | ||
| ad5592r.c | ||
| ad5593r.c | ||
| ad5624r_spi.c | ||
| ad5624r.h | ||
| ad5686-spi.c | ||
| ad5686.c | ||
| ad5686.h | ||
| ad5696-i2c.c | ||
| ad5755.c | ||
| ad5758.c | ||
| ad5761.c | ||
| ad5764.c | ||
| ad5766.c | ||
| ad5770r.c | ||
| ad5791.c | ||
| ad7293.c | ||
| ad7303.c | ||
| ad8801.c | ||
| cio-dac.c | ||
| dpot-dac.c | ||
| ds4424.c | ||
| Kconfig | ||
| lpc18xx_dac.c | ||
| ltc1660.c | ||
| ltc2632.c | ||
| ltc2688.c | ||
| m62332.c | ||
| Makefile | ||
| max517.c | ||
| max5522.c | ||
| max5821.c | ||
| mcp4725.c | ||
| mcp4728.c | ||
| mcp4821.c | ||
| mcp4922.c | ||
| stm32-dac-core.c | ||
| stm32-dac-core.h | ||
| stm32-dac.c | ||
| ti-dac082s085.c | ||
| ti-dac5571.c | ||
| ti-dac7311.c | ||
| ti-dac7612.c | ||
| vf610_dac.c | ||