| Message ID | 20220616013747.126051-1-frank@zago.net |
|---|---|
| Headers | show |
| Series | add driver for the WCH CH341 in I2C/GPIO mode | expand |
On Wed, Jun 15, 2022 at 08:37:43PM -0500, frank zago wrote: > The CH341 is a multifunction chip, presenting 3 different USB PID. One > of these functions is for I2C/SPI/GPIO. This new set of drivers will > manage I2C and GPIO. > > Changes from v5: > Addressed reviewers' comments. Please be more specific in your changelogs. This essentially just says "changed stuff". > Better handling of 0-bytes i2c commands > Use of better USB API. What does this even mean? Johan
The CH341 is a multifunction chip, presenting 3 different USB PID. One of these functions is for I2C/SPI/GPIO. This new set of drivers will manage I2C and GPIO. Changes from v5: Addressed reviewers' comments. Better handling of 0-bytes i2c commands Use of better USB API. Changes from v4: I should have addressed all the comments: rework of the GPIO interrupt handling code to be more modern, changes in Kconfig wording, some code cleanup. Driver was tested again with up to 4 of these devices. No error seen. Changes from v3: - really converted to an MFD driver. Driver is now split into 3 modules (MFD+I2C+GPIO). - minor code cleanups Changes from v2: - bug fixes - more robust USB enumeration - Changed to an MFD driver as suggested During testing I found that i2c handles hot removal, but not gpio. The gpio subsystem will complain with 'REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED', but it's a gpiolib issue. Changes from v1: - Removed double Signed-off-by - Move Kconfig into the same directory as the driver frank zago (4): mfd: ch341: add core driver for the WCH CH341 in I2C/SPI/GPIO mode gpio: ch341: add GPIO MFD cell driver for the CH341 i2c: ch341: add I2C MFD cell driver for the CH341 docs: misc: add documentation for ch341 driver Documentation/misc-devices/ch341.rst | 109 ++++++++ Documentation/misc-devices/index.rst | 1 + MAINTAINERS | 9 + drivers/gpio/Kconfig | 10 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-ch341.c | 385 +++++++++++++++++++++++++++ drivers/i2c/busses/Kconfig | 10 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-ch341.c | 377 ++++++++++++++++++++++++++ drivers/mfd/Kconfig | 10 + drivers/mfd/Makefile | 1 + drivers/mfd/ch341-core.c | 90 +++++++ include/linux/mfd/ch341.h | 26 ++ 13 files changed, 1030 insertions(+) create mode 100644 Documentation/misc-devices/ch341.rst create mode 100644 drivers/gpio/gpio-ch341.c create mode 100644 drivers/i2c/busses/i2c-ch341.c create mode 100644 drivers/mfd/ch341-core.c create mode 100644 include/linux/mfd/ch341.h -- 2.32.0