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View Code? Open in Web Editor NEWScripts to auto-generate pin mux drivers and board configuration tables for Tegra SoCs and boards
Scripts to auto-generate pin mux drivers and board configuration tables for Tegra SoCs and boards
Introduction ============ Many aspects of many of Tegra's pins can configure via the pinmux and GPIO controllers. This project exists to assist with software's handling of the configuration of those controllers. Submitting Changes ================== To submit patches to this project, please use the following commands: * git format-patch --subject-prefix="pinmux scripts PATCH" Creates a patch file from your git commit. * git send-email --to [email protected] *.patch Sends the patch by email to the Tegra mailing list. Even though the primary upstream repository for this project is hosted on github, contributions aren't accepted via github pull requests. Github pull requests would bypass public code review on the project mailing list. Patches should be signed off (include a signed-off-by line) to indicate your acceptance of the code's license (see the license header in each file). See http://developercertificate.org/ for details of what signed-off-by implies. Data files ========== SoC definition The exact set of configurable options varies from chip to chip. This project contains a data file for each chip, which describes the available pins on the chip, along with their parameters, such as the set of available pinmux functions the pin supports. An example is configs/tegra124.soc. Board configuration Much of the programming of these controllers is directly driven by the board design. This project contains a data file for each board, which describes the required configuration for each pin. An example is configs/jetson-tk1.board. Converter Scripts ================= soc-to-kernel-pinctrl-driver.py Reads an SoC definition data file, and emits the source code for a Linux kernel pinctrl driver, e.g. drivers/pinctrl/pinctrl-tegra124.c. soc-to-uboot-driver.py Reads an SoC definition data file, and emits the source code for a U-Boot pinmux driver, e.g. arch/arm/include/asm/arch-tegra124/pinmux.h, arch/arm/cpu/tegra124-common/pinmux.c csv-to-board-tegra124-xlsx.py Part of the output from the board design process is a spreadsheet that describes the required configuration for each pin. This script extracts the final pinmux configuration from (a CSV representation of) such spreadsheets and creates a board configuration such as configs/jetson-tk1.board. board-to-kernel-dt.py Reads a board configuration data file, and emits a device tree fragment suitable for inclusion in a board's device tree file. For example, the output may form part of arch/arm/boot/dts/tegra124-jetson-tk1.dts. Note that when at all possible, it is far preferable for the kernel not to program the pinmux controller, but rather to rely upon system software to have set it up. This reduces duplicate processing of pinmux data, and is consistent with a model where the first software to touch any I/O controller programs the pinmux configuration en mass, to avoid any potential output data glitches. board-to-uboot.py Reads a board configuration data file, and emits a header file suitable for use with U-Boot's pinmux driver. For example, board/nvidia/jetson-tk1/pinmux-config-jetson-tk1.h. Note also the function pinmux_init() in jetson-tk1.c in that same directory.
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