[PATCH v4 0/5] misc: Add mikroBUS driver

Ayush Singh
2024-03-17T19:38:03Z

MikroBUS is an open standard developed by MikroElektronika for connecting
add-on boards to microcontrollers or microprocessors. It essentially
allows you to easily expand the functionality of your main boards using
these add-on boards.

This patchset adds mikroBUS as a Linux bus type and provides a driver to
parse and register the mikroBUS board using mikroBUS manifest.

The patchset is based on work originally done by Vaishnav.

Link: https://www.mikroe.com/mikrobus
Link: https://docs.beagleboard.org/latest/boards/beagleplay/
Link: https://lore.kernel.org/lkml/20240315184908.500352-1-ayushdevel1325@gmail.com/ Patch v3

Changes v4:
- Better commit messages
- Remove clickID, serdev, pwm, regulator, clocks etc. Just the basic
mikroBUS driver.
- Fix a lot of memory leaks, unused variables, etc.
- Create accompanying PR in Greybus Spec repository
- Switch to 80 columns formatting
- Some other fixes pointed out in v3

Changes in v3:
- Use phandle instead of busname for spi
- Use spi board info for registering new device
- Convert dt bindings to yaml
- Add support for clickID
- Code cleanup and style changes
- Additions required to spi, serdev, w1 and regulator subsystems

Changes in v2:
- support for adding mikroBUS ports from DT overlays,
- remove debug sysFS interface for adding mikrobus ports,
- consider extended pin usage/deviations from mikrobus standard
specifications
- use greybus CPort protocol enum instead of new protocol enums
- Fix cases of wrong indentation, ignoring return values, freeing allocated
resources in case of errors and other style suggestions in v1 review.

Ayush Singh (5):
dt-bindings: misc: Add mikrobus-connector
spi: Make of_find_spi_controller_by_node() available
greybus: Add mikroBUS manifest types
mikrobus: Add mikroBUS driver
dts: ti: k3-am625-beagleplay: Add mikroBUS

.../connector/mikrobus-connector.yaml | 113 +++
MAINTAINERS | 7 +
.../arm64/boot/dts/ti/k3-am625-beagleplay.dts | 80 +-
drivers/misc/Kconfig | 1 +
drivers/misc/Makefile | 1 +
drivers/misc/mikrobus/Kconfig | 15 +
drivers/misc/mikrobus/Makefile | 5 +
drivers/misc/mikrobus/mikrobus_core.c | 696 ++++++++++++++++++
drivers/misc/mikrobus/mikrobus_core.h | 151 ++++
drivers/misc/mikrobus/mikrobus_manifest.c | 503 +++++++++++++
drivers/misc/mikrobus/mikrobus_manifest.h | 29 +
drivers/spi/spi.c | 206 +++---
include/linux/greybus/greybus_manifest.h | 49 ++
include/linux/spi/spi.h | 4 +
14 files changed, 1750 insertions(+), 110 deletions(-)
create mode 100644 Documentation/devicetree/bindings/connector/mikrobus-connector.yaml
create mode 100644 drivers/misc/mikrobus/Kconfig
create mode 100644 drivers/misc/mikrobus/Makefile
create mode 100644 drivers/misc/mikrobus/mikrobus_core.c
create mode 100644 drivers/misc/mikrobus/mikrobus_core.h
create mode 100644 drivers/misc/mikrobus/mikrobus_manifest.c
create mode 100644 drivers/misc/mikrobus/mikrobus_manifest.h

base-commit: 61996c073c9b070922ad3a36c981ca6ddbea19a5
--
2.44.0