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path: root/drivers/clk/qcom/clk-cpu-8996.c
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2022-09-26clk: qcom: cpu-8996: use constant mask for pmuxDmitry Baryshkov1-13/+6
Both pmux instances share the same width and shift. Specify the mask at compile time to simplify functions. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220714100351.1834711-7-dmitry.baryshkov@linaro.org
2022-09-26clk: qcom: cpu-8996: don't store parents in clk_cpu_8996_pmuxDmitry Baryshkov1-13/+9
Don't store pointers to parents in struct clk_cpu_8996_pmux. Instead use clk_hw_get_parent_by_index to fetch them. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220714100351.1834711-6-dmitry.baryshkov@linaro.org
2022-09-26clk: qcom: cpu-8996: move ACD logic to clk_cpu_8996_pmux_determine_rateDmitry Baryshkov1-5/+2
Rather than telling everybody that we are using PLL as a parent (and using ACD clock instead) properly select ACD as a pmux parent clock. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220714100351.1834711-5-dmitry.baryshkov@linaro.org
2022-09-26clk: qcom: cpu-8996: declare ACD clocksDmitry Baryshkov1-12/+41
To simplify the code, define 1:1 fixed factor clocks to represent the ACD pmux parent. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220714100351.1834711-4-dmitry.baryshkov@linaro.org
2022-09-26clk: qcom: cpu-8996: switch to devm_clk_notifier_registerDmitry Baryshkov1-23/+2
Switch to using devres-managed version of clk_notifier_register(). This allows us to drop driver's remove() callback. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220714100351.1834711-3-dmitry.baryshkov@linaro.org
2022-09-26clk: qcom: msm8996-cpu: Use parent_data/_hws for all clocksYassine Oudjana1-32/+47
Replace parent_names in PLLs, secondary muxes and primary muxes with parent_data. For primary muxes there were never any *cl_pll_acd clocks, so instead of adding them, put the primary PLLs in both PLL_INDEX and ACD_INDEX, then make sure ACD_INDEX is always picked over PLL_INDEX when setting parent since we always want ACD when using the primary PLLs. Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com> [DB: switch to parent_hws for pmux clocks] Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220714100351.1834711-2-dmitry.baryshkov@linaro.org
2022-09-26clk: qcom: msm8996-cpu: Convert secondary muxes to clk_regmap_muxYassine Oudjana1-32/+30
There is nothing special about the secondary muxes, unlike the primary muxes which need some extra logic to handle ACD and switching between primary PLL and secondary mux sources. Turn them into clk_regmap_mux and rename cpu_clk_msm8996_mux into cpu_clk_msm8996_pmux to make it specific to primary muxes. Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220621160621.24415-5-y.oudjana@protonmail.com
2022-09-26clk: qcom: msm8996-cpu: Unify cluster orderYassine Oudjana1-18/+18
The power cluster comes before the performance cluster. Make everything in the driver follow this order. Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220621160621.24415-4-y.oudjana@protonmail.com
2022-09-26clk: qcom: msm8996-cpu: Statically define PLL dividersYassine Oudjana1-24/+42
This will allow for adding them to clk_parent_data arrays in an upcoming patch. Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220621160621.24415-3-y.oudjana@protonmail.com
2022-09-26clk: qcom: msm8996-cpu: Rename DIV_2_INDEX to SMUX_INDEXYassine Oudjana1-2/+2
The parent at this index is the secondary mux, which can connect not only to primary PLL/2 but also to XO. Rename the index to SMUX_INDEX to better reflect the parent. Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20220621160621.24415-2-y.oudjana@protonmail.com
2020-07-20clk: qcom: msm8996: Make symbol 'cpu_msm8996_clks' staticWei Yongjun1-1/+1
The sparse tool complains as follows: drivers/clk/qcom/clk-cpu-8996.c:341:19: warning: symbol 'cpu_msm8996_clks' was not declared. Should it be static? This variable is not used outside of clk-cpu-8996.c, so this commit marks it static. Fixes: 03e342dc45c9 ("clk: qcom: Add CPU clock driver for msm8996") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Link: https://lore.kernel.org/r/20200714142155.35085-1-weiyongjun1@huawei.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-07-10clk: qcom: Add CPU clock driver for msm8996Loic Poulain1-0/+538
Each of the CPU clusters (Power and Perf) on msm8996 are clocked via 2 PLLs, a primary and alternate. There are also 2 Mux'es, a primary and secondary all connected together as shown below +-------+ XO | | +------------------>0 | | | PLL/2 | SMUX +----+ +------->1 | | | | | | | +-------+ | +-------+ | +---->0 | | | | +---------------+ | +----------->1 | CPU clk |Primary PLL +----+ PLL_EARLY | | +------> | +------+-----------+ +------>2 PMUX | +---------------+ | | | | | +------+ | +-->3 | +--^+ ACD +-----+ | +-------+ +---------------+ +------+ | |Alt PLL | | | +---------------------------+ +---------------+ PLL_EARLY The primary PLL is what drives the CPU clk, except for times when we are reprogramming the PLL itself (for rate changes) when we temporarily switch to an alternate PLL. A subsequent patch adds support to switch between primary and alternate PLL during rate changes. The primary PLL operates on a single VCO range, between 600MHz and 3GHz. However the CPUs do support OPPs with frequencies between 300MHz and 600MHz. In order to support running the CPUs at those frequencies we end up having to lock the PLL at twice the rate and drive the CPU clk via the PLL/2 output and SMUX. So for frequencies above 600MHz we follow the following path Primary PLL --> PLL_EARLY --> PMUX(1) --> CPU clk and for frequencies between 300MHz and 600MHz we follow Primary PLL --> PLL/2 --> SMUX(1) --> PMUX(0) --> CPU clk ACD stands for Adaptive Clock Distribution and is used to detect voltage droops. Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Rajendra Nayak: Initial RFC - https://lkml.org/lkml/2016/9/29/84 Signed-off-by: Ilia Lin <ilialin@codeaurora.org> Ilia Lin: - reworked clock registering - Added clock-tree diagram - non-builtin support - clock notifier on rate change - https://lkml.org/lkml/2018/5/24/123 Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Loic Poulain: - fixed driver remove / clk deregistering - Removed useless memory barriers - devm usage when possible - Fixed Kconfig depends Link: https://lore.kernel.org/r/1593766185-16346-3-git-send-email-loic.poulain@linaro.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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