[RESEND,0/2] Add Intel 8254 Counter support

Message

William Breathitt Gray July 20, 2023, 6:49 p.m. UTC

The Intel 8254 PIT first appeared in the early 1980s and was used
initially in IBM PC compatibles. The popularity of the original Intel
825x family of chips led to many subsequent variants and clones of the
interface in various chips and integrated circuits. Although still
popular, interfaces compatible with the Intel 8254 PIT are nowdays
typically found embedded in larger VLSI processing chips and FPGA
components rather than as discrete ICs.

A library providing support for interfaces compatible with the venerable
Intel 8254 Programmable Interval Timer (PIT) was merged in commit
d428487471ba ("counter: i8254: Introduce the Intel 8254 interface
library module").

Now that the necessary dependencies have been merged, this patchset adds
support for the i8254 in two respective follow-up patches for the
104-dio-48e driver and stx104 driver whose devices feature i8254
compatible interfaces. The two patches are independent and may be taken
each separately in their respective subsystem tree.

William Breathitt Gray (2):
  gpio: 104-dio-48e: Add Counter/Timer support
  iio: addac: stx104: Add 8254 Counter/Timer support

 drivers/gpio/Kconfig            |   1 +
 drivers/gpio/gpio-104-dio-48e.c | 127 ++++++++++++++++++++++++++++----
 drivers/iio/addac/Kconfig       |   1 +
 drivers/iio/addac/stx104.c      |  61 ++++++++++++++-
 4 files changed, 172 insertions(+), 18 deletions(-)