diff options
| author | Klaus H. Sorensen <khso@prevas.dk> | 2020-02-11 15:20:22 +0000 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2020-03-31 10:06:52 -0400 |
| commit | 3fb22bc2f825ea1b3326edc5b32d711a759a265f (patch) | |
| tree | efa15fbaac2202fc0ef0bc10aad9161cb4468689 /drivers/gpio/Kconfig | |
| parent | dd4cf53f9864362d9e92472298ad60dcbb8b7e72 (diff) | |
| download | u-boot-3fb22bc2f825ea1b3326edc5b32d711a759a265f.tar.gz | |
gpio/mpc83xx_spisel_boot.c: gpio driver for SPISEL_BOOT signal
Some SoCs in the mpc83xx family, e.g. mpc8309, have a dedicated spi
chip select, SPISEL_BOOT, that is used by the boot code to boot from
flash.
This chip select will typically be used to select a SPI boot
flash. The SPISEL_BOOT signal is controlled by a single bit in the
SPI_CS register.
Implement a gpio driver for the spi chip select register. This allows a
spi driver capable of using gpios as chip select, to bind a chip select
to SPISEL_BOOT.
It may be a little odd to do this as a GPIO driver, since the signal
is neither GP or I, but it is quite convenient to present it to the
spi driver that way. The alternative it to teach mpc8xxx_spi to handle
the SPISEL_BOOT signal itself (that is how it's done in the linux
kernel, see commit 69b921acae8a)
Signed-off-by: Klaus H. Sorensen <khso@prevas.dk>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Diffstat (limited to 'drivers/gpio/Kconfig')
| -rw-r--r-- | drivers/gpio/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index f751a8b9ea..2081520f42 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -423,6 +423,14 @@ config MPC8XXX_GPIO value setting, the open-drain feature, which can configure individual GPIOs to work as open-drain outputs, is supported. +config MPC83XX_SPISEL_BOOT + bool "Freescale MPC83XX SPISEL_BOOT driver" + depends on DM_GPIO && ARCH_MPC830X + help + GPIO driver to set/clear dedicated SPISEL_BOOT output on MPC83XX. + + This pin is typically used as spi chip select to a spi nor flash. + config MT7621_GPIO bool "MediaTek MT7621 GPIO driver" depends on DM_GPIO && SOC_MT7628 |