On Sun Mar 17, 2024 at 8:37 PM CET, Ayush Singh wrote: > Add DT bindings for mikroBUS interface. MikroBUS is an open standard > developed by MikroElektronika for connecting add-on boards to > microcontrollers or microprocessors. > > mikroBUS is a connector and does not have a controller. Instead the > software is responsible for identification of board and setting up / > registering uart, spi, i2c, pwm and other buses. Thus it needs a way to > get uart, spi, i2c, pwm and gpio controllers / adapters. > > A mikroBUS addon board is free to leave some of the pins unused which > are marked as NC or Not Connected. > > Some of the pins might need to be configured as GPIOs deviating from their > reserved purposes Eg: SHT15 Click where the SCL and SDA Pins need to be > configured as GPIOs for the driver (drivers/hwmon/sht15.c) to work. > > For some add-on boards the driver may not take care of some additional > signals like reset/wake-up/other. Eg: ENC28J60 click where the reset line > (RST pin on the mikrobus port) needs to be pulled high. > > Here's the list of pins in mikroBUS connector: > Analog - AN > Reset - RST > SPI Chip Select - CS > SPI Clock - SCK > SPI Master Input Slave Output - MISO > SPI Master Output Slave Input - MOSI > VCC-3.3V power - +3.3V > Reference Ground - GND > PWM - PWM output > INT - Hardware Interrupt > RX - UART Receive > TX - UART Transmit > SCL - I2C Clock > SDA - I2C Data > +5V - VCC-5V power > GND - Reference Ground > > Additionally, some new mikroBUS boards contain 1-wire EEPROM that contains > a manifest to describe the addon board to provide plug and play > capabilities. > > Link: https://www.mikroe.com/mikrobus > Link: > https://download.mikroe.com/documents/standards/mikrobus/mikrobus-standard-specification-v200.pdf > mikroBUS specification > Link: https://www.mikroe.com/sht1x-click SHT15 Click > Link: https://www.mikroe.com/eth-click ENC28J60 Click > Link: https://www.mikroe.com/clickid ClickID > > Co-developed-by: Vaishnav M A <vaishnav@xxxxxxxxxxxxxxx> > Signed-off-by: Vaishnav M A <vaishnav@xxxxxxxxxxxxxxx> > Signed-off-by: Ayush Singh <ayushdevel1325@xxxxxxxxx> > --- > .../connector/mikrobus-connector.yaml | 113 ++++++++++++++++++ See also https://lore.kernel.org/r/YmFo+EntwxIsco%2Ft@xxxxxxxxxxxxxxxxxx/ Looks like this proposal doesn't have the subnodes. How do you attach a kernel driver to it's spi port for example? Only through the manifest files? -michael
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