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linux-next/drivers/hte/Kconfig

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drivers: Add hardware timestamp engine (HTE) subsystem Some devices can timestamp system lines/signals/Buses in real-time using the hardware counter or other hardware means which can give finer granularity and help avoid jitter introduced by software timestamping. To utilize such functionality, this patchset creates HTE subsystem where devices can register themselves as providers so that the consumers devices can request specific line from the providers. The patch also adds compilation support in Makefile and menu options in Kconfig. The provider does following: - Registers chip with the framework. - Provides translation hook to convert logical line id. - Provides enable/disable, request/release callbacks. - Pushes timestamp data to HTE subsystem. The consumer does following: - Initializes line attribute. - Gets HTE timestamp descriptor. - Requests timestamp functionality. - Puts HTE timestamp descriptor. Signed-off-by: Dipen Patel <dipenp@nvidia.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-04-22 20:52:13 +00:00
# SPDX-License-Identifier: GPL-2.0-only
menuconfig HTE
bool "Hardware Timestamping Engine (HTE) Support"
help
Hardware Timestamping Engine (HTE) Support.
Some devices provide a hardware timestamping engine which can
timestamp certain device lines/signals in realtime. It comes with a
benefit for the applications needing accurate timestamping event with
less jitter. This framework provides a generic interface to such HTE
providers and consumer devices.
If unsure, say no.
hte: Add Tegra194 HTE kernel provider Tegra194 device has multiple HTE instances also known as GTE (Generic Hardware Timestamping Engine) which can timestamp subset of SoC lines and signals. This provider driver focuses on IRQ and GPIO lines and exposes timestamping ability on those lines to the consumers through HTE subsystem. Also, with this patch, added: - documentation about this provider and its capabilities at Documentation/hte. - Compilation support in Makefile and Kconfig Signed-off-by: Dipen Patel <dipenp@nvidia.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-04-22 20:52:14 +00:00
if HTE
config HTE_TEGRA194
tristate "NVIDIA Tegra194 HTE Support"
hte: allow building modules with COMPILE_TEST enabled Allow building all HTE modules with COMPILE_TEST Kconfig option enabled. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Dipen Patel <dipenp@nvidia.com> Signed-off-by: Dipen Patel <dipenp@nvidia.com>
2023-09-11 09:46:04 +00:00
depends on (ARCH_TEGRA_194_SOC || COMPILE_TEST)
hte: tegra194: add GPIOLIB dependency The driver started calling into a few interfaces that are part of GPIOLIB and don't have stub implementations otherwise: drivers/hte/hte-tegra194.c: In function 'tegra_hte_line_xlate': drivers/hte/hte-tegra194.c:424:48: error: implicit declaration of function 'gpio_device_get_base'; did you mean 'gpio_device_get_desc'? [-Werror=implicit-function-declaration] 424 | line_id = desc->attr.line_id - gpio_device_get_base(gs->gdev); | ^~~~~~~~~~~~~~~~~~~~ | gpio_device_get_desc Add a Kconfig dependency to only allow building when this is defined. Fixes: dc850faa28ee0 ("hte: tegra194: don't access struct gpio_chip") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Dipen Patel <dipenp@nvidia.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2023-10-23 18:06:58 +00:00
depends on GPIOLIB
hte: Add Tegra194 HTE kernel provider Tegra194 device has multiple HTE instances also known as GTE (Generic Hardware Timestamping Engine) which can timestamp subset of SoC lines and signals. This provider driver focuses on IRQ and GPIO lines and exposes timestamping ability on those lines to the consumers through HTE subsystem. Also, with this patch, added: - documentation about this provider and its capabilities at Documentation/hte. - Compilation support in Makefile and Kconfig Signed-off-by: Dipen Patel <dipenp@nvidia.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-04-22 20:52:14 +00:00
help
Enable this option for integrated hardware timestamping engine also
known as generic timestamping engine (GTE) support on NVIDIA Tegra194
systems-on-chip. The driver supports 352 LIC IRQs and 39 AON GPIOs
lines for timestamping in realtime.
hte: Add Tegra HTE test driver The test driver uses IRQ and GPIO lines to timestamp using HTE subsystem. The patch also adds compilation support in Kconfig and Makefile. Signed-off-by: Dipen Patel <dipenp@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-04-22 20:52:20 +00:00
config HTE_TEGRA194_TEST
tristate "NVIDIA Tegra194 HTE Test"
hte: allow building modules with COMPILE_TEST enabled Allow building all HTE modules with COMPILE_TEST Kconfig option enabled. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Dipen Patel <dipenp@nvidia.com> Signed-off-by: Dipen Patel <dipenp@nvidia.com>
2023-09-11 09:46:04 +00:00
depends on (HTE_TEGRA194 || COMPILE_TEST)
hte: Add Tegra HTE test driver The test driver uses IRQ and GPIO lines to timestamp using HTE subsystem. The patch also adds compilation support in Kconfig and Makefile. Signed-off-by: Dipen Patel <dipenp@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-04-22 20:52:20 +00:00
help
The NVIDIA Tegra194 GTE test driver demonstrates how to use HTE
framework to timestamp GPIO and LIC IRQ lines.
hte: Add Tegra194 HTE kernel provider Tegra194 device has multiple HTE instances also known as GTE (Generic Hardware Timestamping Engine) which can timestamp subset of SoC lines and signals. This provider driver focuses on IRQ and GPIO lines and exposes timestamping ability on those lines to the consumers through HTE subsystem. Also, with this patch, added: - documentation about this provider and its capabilities at Documentation/hte. - Compilation support in Makefile and Kconfig Signed-off-by: Dipen Patel <dipenp@nvidia.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-04-22 20:52:14 +00:00
endif
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