From: Francesco Dolcini francesco.dolcini@toradex.com
AM62x SoC is available in multiple variant: - CPU cores (Cortex-A) AM62x1 (1 core), AM62x2 (2 cores), AM62x4 (4 cores) - GPU AM625x with GPU, AM623x without GPU - PRU (Programmable RT unit) can be present or not on AM62x2/AM62x4
Remove the relevant FDT nodes by reading the actual configuration from the SoC registers, with that change is possible to have a single dts/dtb file handling the different variant at runtime. While removing GPU node and CPU nodes also the watchdog node in the same Module Domain is removed.
A similar approach is implemented for example on i.MX8 and STM32MP1 SoC.
Since we start using ft_system_setup on a SoC without msmc ram and fdt_fixup_msmc_ram function fails on those SoC (triggering a reset loop) the first commit fix it by calling that function only on specific SoC.
v2: - Moved fdt common functions to to common_fdt.c and ft_system_setup function to specific SoC files (eg. am654_fdt.c) and compile them using relevant configuration - Add GPU and PRU fdt fixup
v1: https://lore.kernel.org/all/20230712134730.30229-1-francesco@dolcini.it/
Emanuele Ghidoli (3): arm: k3: Fix ft_system_setup so it can be enabled on any SoC arm: mach-k3: am62: Add CTRLMMR_WKUP_JTAG_DEVICE_ID register definition arm: mach-k3: am62: Fixup CPU core, gpu and pru nodes in fdt
arch/arm/mach-k3/Makefile | 7 ++ arch/arm/mach-k3/am625_fdt.c | 71 +++++++++++ arch/arm/mach-k3/am654_fdt.c | 12 ++ arch/arm/mach-k3/common.c | 91 -------------- arch/arm/mach-k3/common_fdt.c | 113 ++++++++++++++++++ arch/arm/mach-k3/common_fdt.h | 11 ++ arch/arm/mach-k3/include/mach/am62_hardware.h | 22 ++++ arch/arm/mach-k3/j721e_fdt.c | 12 ++ arch/arm/mach-k3/j721s2_fdt.c | 12 ++ 9 files changed, 260 insertions(+), 91 deletions(-) create mode 100644 arch/arm/mach-k3/am625_fdt.c create mode 100644 arch/arm/mach-k3/am654_fdt.c create mode 100644 arch/arm/mach-k3/common_fdt.c create mode 100644 arch/arm/mach-k3/common_fdt.h create mode 100644 arch/arm/mach-k3/j721e_fdt.c create mode 100644 arch/arm/mach-k3/j721s2_fdt.c