diff options
| author | Gregory CLEMENT | 2018-10-09 14:08:42 +0200 |
|---|---|---|
| committer | Daniel Schwierzeck | 2018-12-19 15:23:01 +0100 |
| commit | 02aea4da1d6d32e9085c2767ad55170338c27f96 (patch) | |
| tree | fdaa3d24666103578a27aacf08733763c9310d5c /drivers/gpio/Kconfig | |
| parent | 53bdae241888de3d23a51735e9610389921b80ae (diff) | |
gpio: mscc-bitbang-spi: Add a simple gpio driver for bitbgang spi
The VCore III SoCs such as the Luton but also the Ocelot can remap an SPI
flash directly in memory. However, for writing in the flash the
communication has to be done by software.
Each of the signal used for the SPI are exposed in a single register. In
order to be able to use the soft-spi driver, the management of this pin
is done through this simple gpio driver.
Even if the main purpose of this driver is to be used by soft-spi, it can
still be used as a normal gpio driver but with limitation: for example
the first pin can't be used as output.
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'drivers/gpio/Kconfig')
| -rw-r--r-- | drivers/gpio/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 35344e57c6c..c8c6c60623e 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -99,6 +99,13 @@ config LPC32XX_GPIO help Support for the LPC32XX GPIO driver. +config MSCC_BITBANG_SPI_GPIO + bool "Microsemi bitbang spi GPIO driver" + depends on DM_GPIO && SOC_VCOREIII + help + Support controlling the GPIO used for SPI bitbang by software. Can + be used by the VCoreIII SoCs, but it was mainly useful for Luton. + config MSM_GPIO bool "Qualcomm GPIO driver" depends on DM_GPIO |