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Many System on Chip(SoC) solutions are complex with multiple processors on the same die dedicated to either general purpose of specialized functions. Many examples do exist in today's SoCs from various vendors. Typical examples are micro controllers such as an ARM M3/M0 doing a offload of specific function such as event integration or power management or controlling camera etc. Traditionally, the responsibility of loading up such a processor with a firmware and communication has been with a High Level Operating System(HLOS) such as Linux. However, there exists classes of products where Linux would need to expect services from such a processor or the delay of Linux and operating system being able to load up such a firmware is unacceptable. To address these needs, we need some minimal capability to load such a system and ensure it is started prior to an Operating System(Linux or any other) is started up. NOTE: This is NOT meant to be a solve-all solution, instead, it tries to address certain class of SoCs and products that need such a solution. A very simple model is introduced here as part of the initial support that supports microcontrollers with internal memory (no MMU, no execution from external memory, or specific image format needs). This basic framework can then (hopefully) be extensible to other complex SoC processor support as need be. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Simon Glass <sjg@chromium.org> |
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| ata | ||
| clock | ||
| exynos | ||
| gpio | ||
| gpu | ||
| i2c | ||
| input | ||
| leds | ||
| misc | ||
| mtd/spi | ||
| nand | ||
| net | ||
| pinctrl | ||
| pmic | ||
| power | ||
| pwm | ||
| regulator | ||
| remoteproc | ||
| serial | ||
| spi | ||
| thermal | ||
| usb | ||
| video | ||
| README | ||
| root.txt | ||
Device Tree Bindings Staging Area ================================= This directory contains device tree bindings for U-Boot. These follow along with Linux kernel bindings, with a few additions. By adding the files here, U-Boot patches can clearly show thees additions. This makes it easier for device tree people to review these additions in patches sent to the U-Boot mailing list. The intent IS to commit these files to U-Boot. Hopefully at some point the files will be stored in another repo (shared with Linux) which is brought in as needed. Changes here are intended to mirror changes in the Linux Documentation/devicetree/bindings/ directory. sjg@chromium.org 17-Jan-12