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D1 (aka D1-H), D1s (aka F133), R528, and T113 are a family of SoCs based on a single die, or at a pair of dies derived from the same design. D1 and D1s contain a single T-HEAD Xuantie C906 CPU, whereas R528 and T113 contain a pair of Cortex-A7's. D1 and R528 are the full version of the chip with a BGA package, whereas D1s and T113 are low-pin-count QFP variants. Because the original design supported both ARM and RISC-V CPUs, some peripherals are duplicated. In addition, all variants except D1s contain a HiFi 4 DSP with its own set of peripherals. The devicetrees are organized to minimize duplication: - Common perhiperals are described in sunxi-d1s-t113.dtsi - DSP-related peripherals are described in sunxi-d1-t113.dtsi - RISC-V specific hardware is described in sun20i-d1s.dtsi - Functionality unique to the D1 variant is described in sun20i-d1.dtsi The SOC_PERIPHERAL_IRQ macro handles the different #interrupt-cells values between the ARM (GIC) and RISC-V (PLIC) versions of the SoC. Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu> Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu> Signed-off-by: Samuel Holland <samuel@sholland.org> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20230126045738.47903-5-samuel@sholland.org Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.