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> --- Changes in v3: - Allocate the node bus clock on the stack, as dynamically allocating it actually wastes memory on systems with 64-bit pointers.. - Add the node bus clock struct member in the correct patch - Simplify using coefficients by only checking the node-level ones, and setting them equal to the bus-specific ones at probe if absent - Fix building on arm32 - Mention some references to the related downstream code - Link to v2: https://lore.kernel.org/r/20230726-topic-icc_coeff-v2-0-8c91c6c76076@xxxxxxxxxx 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 --- 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 | 76 +++++++++++++++++++++++++----- 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, 115 insertions(+), 19 deletions(-) --- base-commit: 71cd4fc492ec41e4acd85e98bbf7a13753fc1e03 change-id: 20230726-topic-icc_coeff-b053d5409b9f Best regards, -- Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
