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spi: Add Socionext F_OSPI SPI flash controller driver

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Introduce Socionext F_OSPI controller driver. This controller is used to
communicate with slave devices such as SPI Flash memories. It supports
4 slave devices and up to 8-bit wide bus, but supports master mode only.

This driver uses spi-mem framework for SPI flash memory access, and
can only operate indirect access mode and single data rate mode.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/20221124003351.7792-3-hayashi.kunihiko@socionext.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kunihiko Hayashi
2022-11-24 09:33:51 +09:00
committed by Mark Brown
parent 41948bd9cf
commit 1b74dd64c8
3 changed files with 713 additions and 0 deletions
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9
drivers/spi/Kconfig
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@@ -906,6 +906,15 @@ config SPI_SLAVE_MT27XX
say Y or M here.If you are not sure, say N.
SPI slave drivers for Mediatek MT27XX series ARM SoCs.
config SPI_SN_F_OSPI
tristate "Socionext F_OSPI SPI flash controller"
depends on OF && HAS_IOMEM
depends on SPI_MEM
help
This enables support for the Socionext F_OSPI controller
for connecting an SPI Flash memory over up to 8-bit wide bus.
It supports indirect access mode only.
config SPI_SPRD
tristate "Spreadtrum SPI controller"
depends on ARCH_SPRD || COMPILE_TEST

1
drivers/spi/Makefile
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@@ -121,6 +121,7 @@ obj-$(CONFIG_SPI_SH_MSIOF) += spi-sh-msiof.o
obj-$(CONFIG_SPI_SH_SCI) += spi-sh-sci.o
obj-$(CONFIG_SPI_SIFIVE) += spi-sifive.o
obj-$(CONFIG_SPI_SLAVE_MT27XX) += spi-slave-mt27xx.o
obj-$(CONFIG_SPI_SN_F_OSPI) += spi-sn-f-ospi.o
obj-$(CONFIG_SPI_SPRD) += spi-sprd.o
obj-$(CONFIG_SPI_SPRD_ADI) += spi-sprd-adi.o
obj-$(CONFIG_SPI_STM32) += spi-stm32.o

703
drivers/spi/spi-sn-f-ospi.c Normal file
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