On 07/31/2017 03:35 PM, Danilo Krummrich wrote:
> diff --git a/Documentation/gpio/drivers-on-gpio.txt
> b/Documentation/gpio/drivers-on-gpio.txt
> index 3065132..b106e72 100644
> --- a/Documentation/gpio/drivers-on-gpio.txt
> +++ b/Documentation/gpio/drivers-on-gpio.txt
> @@ -84,6 +84,11 @@ hardware descriptions such as device tree or ACPI:
> NAND flash MTD subsystem and provides chip access and partition parsing
> like
> any other NAND driving hardware.
>
> +- ps2-gpio: drivers/input/serio/ps2-gpio.c is used to drive an PS2 serio bus,
drive a PS2
Is this PS2 as in IBM Micro Channel or PlayStation 2?
> + data and clock line, by bit banging two GPIO lines. It will appear as any
> + other serio bus to the system and makes it possible to connect drivers for
> + e.g. keyboards and other PS2 protocol based devices.
> +
> Apart from this there are special GPIO drivers in subsystems like MMC/SD to
> read card detect and write protect GPIO lines, and in the TTY serial
> subsystem
> to emulate MCTRL (modem control) signals CTS/RTS by using two GPIO lines. The
> diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
> index c3d05b4..abca0e0 100644
> --- a/drivers/input/serio/Kconfig
> +++ b/drivers/input/serio/Kconfig
> @@ -292,6 +292,16 @@ config SERIO_SUN4I_PS2
> To compile this driver as a module, choose M here: the
> module will be called sun4i-ps2.
>
> +config SERIO_GPIO_PS2
> + tristate "GPIO PS/2 bit banging driver"
depends on GPIO
??
> + help
> + Say Y here if you want PS/2 bit banging support via GPIO.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called gpio-ps2.
> +
> + If you are unsure, say N.
> +
> config USERIO
> tristate "User space serio port driver support"
> help
--
~Randy
