Hi,
this series picks up on Mikhail's H616 LPDDR3 DRAM support (many thanks again for sending that!), and prepends some patches that help to keep the code size down. This was triggered by Mikhail's patches creating bigger binaries, even though the DRAM type is known at compile time, and the compiler should optimise out the unused code parts. Looking at the disassembly I found some issues that this series fixes: - One function was not declared static, so was issued separately in the object file (patch 1/5). - Many functions do not change the values in the struct that gets passed in, so we should mark this pointer as "const", to help the compiler with the "constant propagation" optimisation (patch 2/5). - This alone does not really help, as this structure contains both variable and fixed fields. Patch 3/5 splits that up, so we can define one struct as "static const", which finally convinces the compiler to fold the compile-time constants into the code, and removes the code for the unused DRAM variant, along with other code parts. Even without the LPDDR3 support this reduces the code size by about 2KB(!), and allows the LPDDR3 patches to come for free, code-size wise. - The final two patches are Mikhail's patches, slightly massaged: white space issue, keeping the static const phy_init[] array, rebased on top of the "const" work above. I haven't reviewed the patch in anger, though.
Please have a look and test.
Cheers, Andre
Andre Przywara (3): sunxi: dram: make MBUS configuration functions static sunxi: H616: dram: const-ify DRAM function parameters sunxi: H616: dram: split struct dram_para
iuncuim (2): sunxi: H616: add DRAM type selection sunxi: H616: add LPDDR3 DRAM support
.../include/asm/arch-sunxi/dram_sun50i_h616.h | 12 +- arch/arm/mach-sunxi/Kconfig | 18 +- arch/arm/mach-sunxi/dram_sun50i_h6.c | 3 +- arch/arm/mach-sunxi/dram_sun50i_h616.c | 383 +++++++++++------- arch/arm/mach-sunxi/dram_sunxi_dw.c | 18 +- arch/arm/mach-sunxi/dram_timings/Makefile | 4 +- .../mach-sunxi/dram_timings/h616_ddr3_1333.c | 2 +- .../arm/mach-sunxi/dram_timings/h616_lpddr3.c | 95 +++++ configs/orangepi_zero2_defconfig | 1 + configs/x96_mate_defconfig | 1 + 10 files changed, 372 insertions(+), 165 deletions(-) create mode 100644 arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c