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. I've also added some minor patches to bring the device tree and clock driver closer to what Linux has (or will have).
The bypass clock turned out to be still necessary after all; I had neglected to test with CLK_K210_SET_RATE enabled, and I didn't notice that the clock rate wasn't actually getting set (oops). I've added a warning which will hopefully make it more difficult to make such mistakes in the future.
Changes in v3: - Add a warning if we can't assign rates - Split off patchs for fdtdec_setup_mem_size_base_* into another series - Eliminated separate RAM driver - Rebased onto u-boot/next
Changes in v2: - Don't re-enable the PLL - 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 (11): clk: Warn on failure to assign rate clk: k210: Fix PLLs not being enabled clk: k210: Fix PLL enable always getting taken 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 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
arch/riscv/dts/k210.dtsi | 22 +++++++--------------- board/sipeed/maix/maix.c | 14 ++++++++++++-- configs/sipeed_maix_bitm_defconfig | 2 ++ drivers/clk/clk-uclass.c | 11 +++++++---- drivers/clk/kendryte/clk.c | 26 ++++++++++++++------------ drivers/clk/kendryte/pll.c | 26 ++++---------------------- include/configs/sipeed-maix.h | 3 +-- include/kendryte/pll.h | 4 ---- 8 files changed, 47 insertions(+), 61 deletions(-)