Hello Lee, On 01/24/2017 09:22 AM, Lee Jones wrote: > On Mon, 23 Jan 2017, Arnaud Pouliquen wrote: > >> DFSDM hardware IP can be used at the same time for ADC sigma delta > > Same time as what? DFSDM is used for ADC acquisition (through IIO) but also PDM microphone capture (through ASOC). > >> conversion and audio PDM microphone. >> MFD driver is in charge of configuring IP registers and managing IP clocks. >> For this it exports an API to handles filters and channels resources. > > This looks like an ADC driver? What is it that makes it an MFD? Yes it a kind of ADC but that supports 2 features audio and iio. So it has to support 2 features based on 2 separate Frameworks. > >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx> >> --- >> drivers/mfd/Kconfig | 11 + >> drivers/mfd/Makefile | 2 + >> drivers/mfd/stm32-dfsdm-reg.h | 220 +++++++++ >> drivers/mfd/stm32-dfsdm.c | 1044 +++++++++++++++++++++++++++++++++++++++ >> include/linux/mfd/stm32-dfsdm.h | 324 ++++++++++++ >> 5 files changed, 1601 insertions(+) >> create mode 100644 drivers/mfd/stm32-dfsdm-reg.h >> create mode 100644 drivers/mfd/stm32-dfsdm.c >> create mode 100644 include/linux/mfd/stm32-dfsdm.h >> >> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig >> index c6df644..4bb660b 100644 >> --- a/drivers/mfd/Kconfig >> +++ b/drivers/mfd/Kconfig >> @@ -1607,6 +1607,17 @@ config MFD_STW481X >> in various ST Microelectronics and ST-Ericsson embedded >> Nomadik series. >> >> +config MFD_STM32_DFSDM >> + tristate "ST Microelectronics STM32 DFSDM" >> + depends on (ARCH_STM32 && OF) || COMPILE_TEST >> + select MFD_CORE >> + select REGMAP >> + select REGMAP_MMIO >> + help >> + Select this option to enable the STM32 Digital Filter >> + for Sigma Delta Modulators (DFSDM) driver used >> + in various STM32 series. >> + >> menu "Multimedia Capabilities Port drivers" >> depends on ARCH_SA1100 > > [...] > Regards Arnaud -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
