This ram bank was previously unusable because PLL1 was not started correctly. This series fixes that bug, and allows U-Boot to relocate into the AI ram. This provides an extra 2M of space in which to load payloads.
Second time around and I realized that the bypass clock is no longer necessary (yay). This also necessitates a few more small fixups. I've also added some minor patches to bring the device tree and clock driver closer to what Linux has (or will have). This should be the last round of additions to this series.
Changes in v2: - Don't re-enable the PLL - Remove bypass clock, which is no longer necessary - Simplify PLL instantiation - Modify clock tree so clint is a child of aclk - Sync memory dts node with Linux - Use correct aisram clock
Sean Anderson (16): clk: k210: Fix PLLs not being enabled clk: k210: Fix PLL enable always getting taken clk: k210: Remove bypass clock clk: k210: Remove k210_register_pll clk: k210: Move the clint clock to under aclk clk: Add support for the k210 clock driver pre-relocation riscv: Enable some devices pre-relocation lib: fdt: Add fdtdec_setup_mem_size_base_highest test: Add a test for fdtdec_setup_mem_size_base et al. ram: Add driver for K210 SRAM ram: sifive: Default to y only if compiling for fu540 riscv: Probe ram in dram_init riscv: Enable AI ram on K210 riscv: k210: Rename airam to aisram riscv: k210: Use AI as the parent clock of aisram, not PLL1 riscv: Don't reserve AI ram in k210 dts
MAINTAINERS | 1 + arch/riscv/cpu/generic/dram.c | 26 +++ arch/riscv/dts/k210.dtsi | 22 +-- arch/sandbox/dts/test.dts | 12 ++ board/sipeed/maix/Kconfig | 2 + board/sipeed/maix/maix.c | 26 --- configs/sandbox64_defconfig | 2 +- configs/sandbox_defconfig | 2 +- configs/sandbox_flattree_defconfig | 2 +- configs/sipeed_maix_bitm_defconfig | 1 + drivers/clk/kendryte/Makefile | 2 +- drivers/clk/kendryte/bypass.c | 273 ----------------------------- drivers/clk/kendryte/clk.c | 61 +++---- drivers/clk/kendryte/pll.c | 26 +-- drivers/ram/Kconfig | 7 + drivers/ram/Makefile | 1 + drivers/ram/kendryte.c | 56 ++++++ drivers/ram/sifive/Kconfig | 2 +- include/configs/sipeed-maix.h | 4 - include/fdtdec.h | 19 +- include/kendryte/bypass.h | 31 ---- include/kendryte/pll.h | 4 - lib/fdtdec.c | 34 +++- test/dm/fdtdec.c | 38 ++++ 24 files changed, 230 insertions(+), 424 deletions(-) delete mode 100644 drivers/clk/kendryte/bypass.c create mode 100644 drivers/ram/kendryte.c delete mode 100644 include/kendryte/bypass.h