On Wed, 15 Apr 2020, Christophe Kerello wrote: > The driver adds the support for the STMicroelectronics FMC2 controller > found on STM32MP SOCs. > > The FMC2 functional block makes the interface with: synchronous and > asynchronous static memories (such as PSNOR, PSRAM or other > memory-mapped peripherals) and NAND flash memories. > > Signed-off-by: Christophe Kerello <christophe.kerello@xxxxxx> > --- > Changes in v2: > - remove ops from stm32_fmc2 structure > - add 2 APIs to manage FMC2 enable/disable > - add 2 APIs to manage FMC2 NWAIT shared signal > > drivers/mfd/Kconfig | 12 +++ > drivers/mfd/Makefile | 1 + > drivers/mfd/stm32-fmc2.c | 136 +++++++++++++++++++++++++ > include/linux/mfd/stm32-fmc2.h | 225 +++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 374 insertions(+) > create mode 100644 drivers/mfd/stm32-fmc2.c > create mode 100644 include/linux/mfd/stm32-fmc2.h > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index 2b20329..5260582 100644 > --- a/drivers/mfd/Kconfig > +++ b/drivers/mfd/Kconfig > @@ -1922,6 +1922,18 @@ config MFD_ROHM_BD71828 > Also included is a Coulomb counter, a real-time clock (RTC), and > a 32.768 kHz clock gate. > > +config MFD_STM32_FMC2 > + tristate "Support for FMC2 controllers on STM32MP SoCs" > + depends on MACH_STM32MP157 || COMPILE_TEST > + select MFD_CORE > + select REGMAP > + select REGMAP_MMIO > + help > + Select this option to enable STM32 FMC2 driver used for FMC2 External > + Bus Interface controller and FMC2 NAND flash controller. This driver > + provides core support for the STM32 FMC2 controllers, in order to use > + the actual functionality of the device other drivers must be enabled. Not sure how many times I have to say this before people stop attempting to pass these kinds of relationships off as MFDs: A memory device and its bus is not an MFD. In a similar vain to the thousands of USB, I2C, SPI, PCI and the like devices that aren't MFDs either. Please find another way to associate your device with its bus. -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
