This series aims to add support for the following DAC chips by Microchip: - MCP4801 (8 bit, 1 channel) - MCP4802 (8 bit, 2 channels) - MCP4811 (10 bit, 1 channel) - MCP4812 (10 bit, 2 channels) - MCP4821 (12 bit, 1 channel) - MCP4822 (12 bit, 2 channels) The chips' interface is compatible with that of the MCP49XX ones, but they come with an internal 2.048V voltage reference, meaning there is no need for an external voltage reference (and no way to use one.) The first patch rectifies an issue with the mcp4922 bindings where there was no vdd-supply property modeled. Those chips do have a second supply aside from vref, the vdd-supply, which powers the digital logic side of things. Patch number 2 uses the vdd regulator in the driver. This is just fairly boring "enable it here, disable it here" type stuff. Patch number 3 adds the bindings for the MCP48XX chips. We add the whole family, not just the ones that have an analogous 4922 enum. There is a need for a separate binding as making vref only required for some in the mcp4922 binding would make it more complicated than it's worth. Patch number 4 finally makes all the driver changes to support the MCP48XX chips. All changes have been tested on an MCP4821. I don't own the full line of MCP48XX and MCP49XX chips, so couldn't exhaustively test everything for all of them, but if Microchip feels like sending some over then I am more than happy to receive them. Kind regards, Nicolas Frattaroli Nicolas Frattaroli (4): dt-bindings: iio: dac: mcp4922: add vdd-supply property iio: dac: mcp4922: get and enable vdd regulator dt-bindings: iio: dac: add mcp4822 iio: dac: mcp4922: add support for mcp48xx series chips .../bindings/iio/dac/microchip,mcp4822.yaml | 49 +++++++ .../bindings/iio/dac/microchip,mcp4922.yaml | 4 + drivers/iio/dac/mcp4922.c | 130 ++++++++++++++---- 3 files changed, 154 insertions(+), 29 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/dac/microchip,mcp4822.yaml -- 2.40.0
