Certain platforms require that some buses (or individual nodes) make
some additional changes to the clock rate formula, throwing in some
magic, Qualcomm-defined coefficients, to account for "inefficiencies".
Add the framework for it and utilize it on a couple SoCs.
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
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Changes in v2:
- Use the (arguably less favourable but necessary for precission) 100/x
instead of x/100 for ib coefficient, update values in consequent
patches to reflect that
- Rename "_percent" to "_coeff" because of /\
- Add the necessary code to support per-node clocks
- Add the necessary code to support per-node coefficients
- Hook up the CPUSS<->GNoC clock on QCM2290
- Update EBI node on QCM2290
- Link to v1: https://lore.kernel.org/r/20230726-topic-icc_coeff-v1-0-31616960818c@xxxxxxxxxx
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Konrad Dybcio (10):
interconnect: qcom: icc-rpm: Add AB/IB calculations coefficients
interconnect: qcom: icc-rpm: Separate out clock rate calulcations
interconnect: qcom: icc-rpm: Let nodes drive their own bus clock
interconnect: qcom: icc-rpm: Check for node-specific rate coefficients
interconnect: qcom: qcm2290: Hook up MAS_APPS_PROC's bus clock
interconnect: qcom: qcm2290: Set AB coefficients
interconnect: qcom: qcm2290: Update EBI channel configuration
interconnect: qcom: sdm660: Set AB/IB coefficients
interconnect: qcom: msm8996: Set AB/IB coefficients
clk: qcom: smd-rpm: Move CPUSS_GNoC clock to interconnect
drivers/clk/qcom/clk-smd-rpm.c | 16 ++++--
drivers/interconnect/qcom/icc-rpm-clocks.c | 6 ++
drivers/interconnect/qcom/icc-rpm.c | 92 ++++++++++++++++++++++++------
drivers/interconnect/qcom/icc-rpm.h | 15 +++++
drivers/interconnect/qcom/msm8996.c | 8 ++-
drivers/interconnect/qcom/qcm2290.c | 9 ++-
drivers/interconnect/qcom/sdm660.c | 4 ++
7 files changed, 124 insertions(+), 26 deletions(-)
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base-commit: ec89391563792edd11d138a853901bce76d11f44
change-id: 20230726-topic-icc_coeff-b053d5409b9f
Best regards,