diff options
| author | William Breathitt Gray <william.gray@linaro.org> | 2022-07-20 16:45:59 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <brgl@bgdev.pl> | 2022-07-20 18:44:36 +0300 |
| commit | fb38af4a3a79c354771f335c671b144348d6d6fa (patch) | |
| tree | f8c1c06bd9b592d7ee4bf4701db9931ed040bd3c /drivers/gpio/Kconfig | |
| parent | cc442e4db9cb851f18cd3ea0c933e016b29fafc3 (diff) | |
| download | linux-fb38af4a3a79c354771f335c671b144348d6d6fa.tar.xz | |
gpio: i8255: Introduce the Intel 8255 interface library module
Exposes consumer library functions providing support for interfaces
compatible with the venerable Intel 8255 Programmable Peripheral
Interface (PPI).
The Intel 8255 PPI first appeared in the early 1970s, initially for the
Intel 8080 and later appearing in the original IBM-PC. The popularity of
the original Intel 8255 chip led to many subsequent variants and clones
of the interface in various chips and integrated circuits. Although
still popular, interfaces compatible with the Intel 8255 PPI are
nowdays typically found embedded in larger VLSI processing chips and
FPGA components rather than as discrete ICs.
A CONFIG_GPIO_I8255 Kconfig option is introduced by this patch. Modules
wanting access to these i8255 library functions should select this
Kconfig option, and import the I8255 symbol namespace.
Tested-by: Fred Eckert <Frede@cmslaser.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: John Hentges <jhentges@accesio.com>
Cc: Jay Dolan <jay.dolan@accesio.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Diffstat (limited to 'drivers/gpio/Kconfig')
| -rw-r--r-- | drivers/gpio/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index cf6a2c745f3f..df484b72000d 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -824,6 +824,18 @@ endmenu menu "Port-mapped I/O GPIO drivers" depends on X86 # Unconditional I/O space access +config GPIO_I8255 + tristate + help + Enables support for the i8255 interface library functions. The i8255 + interface library provides functions to facilitate communication with + interfaces compatible with the venerable Intel 8255 Programmable + Peripheral Interface (PPI). The Intel 8255 PPI chip was first released + in the early 1970s but compatible interfaces are nowadays typically + found embedded in larger VLSI processing chips and FPGA components. + + If built as a module its name will be gpio-i8255. + config GPIO_104_DIO_48E tristate "ACCES 104-DIO-48E GPIO support" depends on PC104 |