The SD controller found in STM32 MCUs happens to be yet another variant
of the ARM PrimeCell PL18x SD host controller, for which the mmci driver
exists.
This series adds support for it to the mmci driver.
As other variants, this one need some specific quirks, that this series
address. Most notably this variant has not AMBA PrimeCell id registers,
so we can't probe it using the AMBA PrimeCell generic "compatible" and
mechanism; rather this series adds support to the mmci driver for
register itself also as platform driver, so that specific "compatible"
strings can also be used.
I tested this on my STM32F469-disco board, that is able to boot from an
SD card, and write/read to/from it.
RFT for other variants (to check I didn't broke anything) and with MMC
cards. In particular I tried to implement also support for open-collector
communication mode, that AFAICT is used only on MMC cards, but I couldn't
test it.
Changes since v1:
- fixed compile failure when CONFIG_ARM_AMBA is enabled
- fixed mmc CD pin claimed two times
- trivial whitespace and newline fixes
Changes since v2:
- dropped pinmux cfg for CD pin: it is handled by MMC layer using gpiolib
Andrea Merello (9):
mmc: mmci: don't pretend IP variants with only one IRQ to have two
mask regs
mmc: mmci: add support for not-amba, but still compatible, variants
mmc: mmci: don't pretend all variants to have MCI_STARBITERR flag
mmc: mmci: add support for setting pad type via pinctrl
mmc: mmci: add STM32 variant
ARM: DTS: stm32: add pin map for SDIO controller on stm32f429
ARM: DTS: stm32: add node for SDIO controller on stm32f429
ARM: DTS: enable SDIO controller on stm32f469 disco board
Documentation: document mmci STM32 DT binding
Documentation/devicetree/bindings/mmc/mmci.txt | 2 +-
arch/arm/boot/dts/stm32f429.dtsi | 47 ++-
arch/arm/boot/dts/stm32f469-disco.dts | 18 ++
drivers/mmc/host/Kconfig | 8 +-
drivers/mmc/host/mmci.c | 398 +++++++++++++++++++------
drivers/mmc/host/mmci.h | 7 +-
6 files changed, 385 insertions(+), 95 deletions(-)
--
2.7.4
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