linux-kernel - [RFC PATCH v1 00/20] Review Request: Add support for Intel PMC

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Date:   Tue, 24 Aug 2021 22:17:41 +0530
From:   lakshmi.sowjanya.d@...el.com
To:     linus.walleij@...aro.org
Cc:     linux-gpio@...r.kernel.org, bgolaszewski@...libre.com,
        linux-kernel@...r.kernel.org, mgross@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, tamal.saha@...el.com,
        bala.senthil@...el.com, lakshmi.sowjanya.d@...el.com
Subject: [RFC PATCH v1 00/20] Review Request: Add support for Intel PMC

From: Lakshmi Sowjanya D <lakshmi.sowjanya.d@...el.com>

Starting with Intel(R) Tiger Lake and Elkhart Lake platforms the PMC
hardware adds the Timed I/O hardware interface.

The Timed I/O hardware implements some functionality similar to GPIO
with added timing logic that is driven by the Always Running Timer
(ART).

The Timed I/O Hardware implement 3 basic functions:
  * Input Timestamping
  * Single Shot Timed Output
  * Periodic Timed Output

 Please help to review the changes.

Thanks in advance,
Sowjanya 

Christopher Hall (9):
  gpio: Add basic GPIO driver for Intel PMC Timed I/O device
  arch: x86: Add ART support function to tsc code
  gpio: Add input code to Intel PMC Timed I/O Driver
  tools: gpio: Add additional polling support to gpio-event-mon
  kernel: time: Add system time to system counter translation
  tools: gpio: Add GPIO output generation user application
  arch/x86: Add ART nanosecond to ART conversion
  pwm: Add capability for PWM Driver managed state
  tools: gpio: Add PWM monitor application

Lakshmi Sowjanya D (11):
  gpio: Add GPIO polling interface to GPIO lib
  gpio: Add set_input and polling interface to GPIO lib code
  gpio: Add output event generation method to GPIOLIB and PMC Driver
  arch: x86: Add TSC to ART translation
  gpio: Add event count interface to gpiolib
  gpio: Add event count to Intel(R) PMC Timed I/O driver
  tools: gpio: Add event count capability to event monitor application
  gpio: Add PWM capabilities to Intel(R) PMC TIO driver
  pwm: Add second alignment to the core PWM interface
  gpio: Add PWM alignment support to the Intel(R) PMC Timed I/O driver
  gpio: Add GPIO monitor line to Intel(R) Timed I/O Driver

 MAINTAINERS                       |   7 +
 arch/x86/include/asm/tsc.h        |   5 +
 arch/x86/kernel/tsc.c             |  73 +++
 drivers/gpio/Kconfig              |  11 +
 drivers/gpio/Makefile             |   1 +
 drivers/gpio/gpio-intel-tio-pmc.c | 834 ++++++++++++++++++++++++++++++
 drivers/gpio/gpiolib-cdev.c       | 145 +++++-
 drivers/pwm/core.c                |  10 +-
 drivers/pwm/sysfs.c               |  37 ++
 include/linux/gpio/driver.h       |  29 ++
 include/linux/pwm.h               |   3 +
 include/linux/timekeeping.h       |   3 +
 include/uapi/linux/gpio.h         |  21 +
 kernel/time/timekeeping.c         |  63 +++
 tools/gpio/.gitignore             |   1 +
 tools/gpio/Build                  |   2 +
 tools/gpio/Makefile               |  21 +-
 tools/gpio/gpio-event-gen.c       | 191 +++++++
 tools/gpio/gpio-event-mon.c       |  58 ++-
 tools/gpio/gpio-pwm-mon.c         | 431 +++++++++++++++
 20 files changed, 1916 insertions(+), 30 deletions(-)
 create mode 100644 drivers/gpio/gpio-intel-tio-pmc.c
 create mode 100644 tools/gpio/gpio-event-gen.c
 create mode 100644 tools/gpio/gpio-pwm-mon.c

-- 
2.17.1