[PATCH 2/7] MFD: add STM32 DFSDM support

Lee Jones
2017-01-24T08:22:49Z

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?

> 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?

> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
> ---
> 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

[...]

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
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