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Add the operating-points-v2 table with CPU frequency steps from 200MHz to 1.25GHz. Specify the CPU clocks to reference the SCMI clock controller for frequency scaling. Signed-off-by: Dhruva Gole Reviewed-by: Kendall Willis --- Hello, This series adds CPU frequency scaling support for the TI AM62L3 SoC. The AM62L3 is a low-power, low-cost SoC from Texas Instruments. This series enables cpufreq support by: 1. Adding the SoC to the cpufreq-dt-platdev blocklist to prevent the generi= c driver from probing. 2. Extending the ti-cpufreq driver to support AM62L3 speed grading by readi= ng the efuse. 3. Updating the device tree with the necessary operating points and clock c= onfigurations. Tested on AM62L3 EVM [1] [1] https://gist.github.com/DhruvaG2000/6dcceb80cf7bbd1e624ec210532538cb --- Changes in v5: - Update the opp-supported-hw value of 1Ghz entry to 0x02 - Minor reword of commit message - Link to v4: https://lore.kernel.org/all/20260122-am62l-dt-cpufreq-v1-1-fa= bcc15e25fa@ti.com/ Changes in v4: - Sent as a stand alone patch. - Fix the bit fields in the OPPs as per Kendall's suggestion - Fix the scmi_clk ID of the second A53 core - Link to v3: https://lore.kernel.org/r/20260120-am62l-cpufreq-v3-0-8c69b80= 168a3@ti.com Changes in v3: - Sorted the #defines and structs for am62l as well after am62a - Pick the R-by tag from Kendall - Link to v2: https://lore.kernel.org/r/20260116-am62l-cpufreq-v2-0-eac7e2e= 78d29@ti.com Changes in v2: - Sort alphabetically while adding AM62L as per Krzysztof's comments - Link to v1: https://lore.kernel.org/r/20260116-am62l-cpufreq-v1-0-63d0623= 17ae9@ti.com --- arch/arm64/boot/dts/ti/k3-am62l-wakeup.dtsi | 5 +++ arch/arm64/boot/dts/ti/k3-am62l3.dtsi | 47 +++++++++++++++++++++++++= ++++ 2 files changed, 52 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am62l-wakeup.dtsi b/arch/arm64/boot/= dts/ti/k3-am62l-wakeup.dtsi index 61bfcdcfc66ea8d802a36ed43cd01fbbf3decc70..a42ccd0d2fcc4d204cae81508f8= 39c44ce83f558 100644 --- a/arch/arm64/boot/dts/ti/k3-am62l-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62l-wakeup.dtsi @@ -127,6 +127,11 @@ chipid: chipid@14 { bootph-all; }; =20 + opp_efuse_table: syscon@18 { + compatible =3D "ti,am62-opp-efuse-table", "syscon"; + reg =3D <0x18 0x4>; + }; + cpsw_mac_syscon: ethernet-mac-syscon@2000 { compatible =3D "ti,am62p-cpsw-mac-efuse", "syscon"; reg =3D <0x2000 0x8>; diff --git a/arch/arm64/boot/dts/ti/k3-am62l3.dtsi b/arch/arm64/boot/dts/ti= /k3-am62l3.dtsi index da220b85151227c63f59b2b8ec48ae2ebb37e7bf..fc514e19f57d5318f851bad2756= 817dd7ec29b38 100644 --- a/arch/arm64/boot/dts/ti/k3-am62l3.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62l3.dtsi @@ -39,6 +39,8 @@ cpu0: cpu@0 { d-cache-line-size =3D <64>; d-cache-sets =3D <128>; next-level-cache =3D <&l2_0>; + operating-points-v2 =3D <&a53_opp_table>; + clocks =3D <&scmi_clk 356>; }; =20 cpu1: cpu@1 { @@ -53,6 +55,8 @@ cpu1: cpu@1 { d-cache-line-size =3D <64>; d-cache-sets =3D <128>; next-level-cache =3D <&l2_0>; + operating-points-v2 =3D <&a53_opp_table>; + clocks =3D <&scmi_clk 357>; }; }; =20 @@ -64,4 +68,47 @@ l2_0: l2-cache0 { cache-line-size =3D <64>; cache-sets =3D <256>; }; + + a53_opp_table: opp-table { + compatible =3D "operating-points-v2-ti-cpu"; + opp-shared; + syscon =3D <&opp_efuse_table>; + + opp-200000000 { + opp-hz =3D /bits/ 64 <200000000>; + opp-supported-hw =3D <0x01 0x0003>; + clock-latency-ns =3D <6000000>; + }; + + opp-400000000 { + opp-hz =3D /bits/ 64 <400000000>; + opp-supported-hw =3D <0x01 0x0003>; + clock-latency-ns =3D <6000000>; + }; + + opp-600000000 { + opp-hz =3D /bits/ 64 <600000000>; + opp-supported-hw =3D <0x01 0x0003>; + clock-latency-ns =3D <6000000>; + }; + + opp-800000000 { + opp-hz =3D /bits/ 64 <800000000>; + opp-supported-hw =3D <0x01 0x0003>; + clock-latency-ns =3D <6000000>; + }; + + opp-1000000000 { + opp-hz =3D /bits/ 64 <1000000000>; + opp-supported-hw =3D <0x01 0x0002>; + clock-latency-ns =3D <6000000>; + }; + + opp-1250000000 { + opp-hz =3D /bits/ 64 <1250000000>; + opp-supported-hw =3D <0x01 0x0002>; + clock-latency-ns =3D <6000000>; + opp-suspend; + }; + }; }; --- base-commit: 9b7977f9e39b7768c70c2aa497f04e7569fd3e00 change-id: 20260116-am62l-cpufreq-1987a04a6f68 Best regards, --=20 Dhruva Gole