Hello,
I was helping with fixing EMC clock scaling on T124 Nyan Big and
in process found some weak points in the code. Primarily the ram code
parsing didn't work if device-tree defines memory timings for multiple
ram codes and after fixing that I spotted few other things that could be
improved.
Changelog:
v2: Corrected "Mark Memory Controller clock as read-only" patch that
had the "read-only divider" flag being set in a wrong place. Note
it also turned out that this patch is needed for a proper EMC freq
scaling on Tegra30 because some of memory timings may have
configuration where MC clock configuration should be changed
simultaneously with the EMC change and currently CLK framework
reconfigure the divider back to /2 mode after EMC clock changes
since it's the parent clock for MC. Although it's not really critical
since system remains fully functional if MC clock configuration
doesn't match the memory arbitration configuration.
Dmitry Osipenko (5):
clk: tegra: emc: Don't enable EMC clock manually
clk: tegra: emc: Support multiple RAM codes
clk: tegra: emc: Fix EMC max-rate clamping
clk: tegra: emc: Replace BUG() with WARN_ONCE()
clk: tegra: divider: Mark Memory Controller clock as read-only
drivers/clk/tegra/clk-divider.c | 3 +-
drivers/clk/tegra/clk-emc.c | 57 ++++++++++++++++++++-------------
2 files changed, 37 insertions(+), 23 deletions(-)
--
2.21.0
