diff options
| author | Nick Chan <towinchenmi@gmail.com> | 2025-02-03 20:43:46 +0800 |
|---|---|---|
| committer | Sven Peter <sven@svenpeter.dev> | 2025-02-09 11:50:13 +0000 |
| commit | 1174a4690b1dc1f37bd5039269b312b2bb496e39 (patch) | |
| tree | f919ea806335afa59963ad6be44ba09e9d50c90a | |
| parent | 029e1d609a20941fb4424da985073a2734ab2cc9 (diff) | |
arm64: dts: apple: t8011: Add cpufreq nodes
Add cpufreq nodes for Apple A10 SoC. There is a transparent hardware
big.LITTLE switcher in this SoC. Spoof E-core p-state frequencies such
that CPU capacity does not appear to change when switching between core
types.
Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
| -rw-r--r-- | arch/arm64/boot/dts/apple/t8011.dtsi | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/apple/t8011.dtsi b/arch/arm64/boot/dts/apple/t8011.dtsi index b845fa6f6d64..5b280c896b76 100644 --- a/arch/arm64/boot/dts/apple/t8011.dtsi +++ b/arch/arm64/boot/dts/apple/t8011.dtsi @@ -32,6 +32,8 @@ compatible = "apple,hurricane-zephyr"; reg = <0x0 0x0>; cpu-release-addr = <0 0>; /* To be filled by loader */ + operating-points-v2 = <&fusion_opp>; + performance-domains = <&cpufreq>; enable-method = "spin-table"; device_type = "cpu"; }; @@ -40,6 +42,8 @@ compatible = "apple,hurricane-zephyr"; reg = <0x0 0x1>; cpu-release-addr = <0 0>; /* To be filled by loader */ + operating-points-v2 = <&fusion_opp>; + performance-domains = <&cpufreq>; enable-method = "spin-table"; device_type = "cpu"; }; @@ -48,11 +52,80 @@ compatible = "apple,hurricane-zephyr"; reg = <0x0 0x2>; cpu-release-addr = <0 0>; /* To be filled by loader */ + operating-points-v2 = <&fusion_opp>; + performance-domains = <&cpufreq>; enable-method = "spin-table"; device_type = "cpu"; }; }; + fusion_opp: opp-table { + compatible = "operating-points-v2"; + + /* + * Apple Fusion Architecture: Hardwired big.LITTLE switcher + * that use p-state transitions to switch between cores. + * + * The E-core frequencies are adjusted so performance scales + * linearly with reported clock speed. + */ + + opp01 { + opp-hz = /bits/ 64 <172000000>; /* 300 MHz, E-core */ + opp-level = <1>; + clock-latency-ns = <12000>; + }; + opp02 { + opp-hz = /bits/ 64 <230000000>; /* 396 MHz, E-core */ + opp-level = <2>; + clock-latency-ns = <135000>; + }; + opp03 { + opp-hz = /bits/ 64 <448000000>; /* 768 MHz, E-core */ + opp-level = <3>; + clock-latency-ns = <105000>; + }; + opp04 { + opp-hz = /bits/ 64 <662000000>; /* 1152 MHz, E-core */ + opp-level = <4>; + clock-latency-ns = <115000>; + }; + opp05 { + opp-hz = /bits/ 64 <804000000>; + opp-level = <5>; + clock-latency-ns = <122000>; + }; + opp06 { + opp-hz = /bits/ 64 <1140000000>; + opp-level = <6>; + clock-latency-ns = <120000>; + }; + opp07 { + opp-hz = /bits/ 64 <1548000000>; + opp-level = <7>; + clock-latency-ns = <125000>; + }; + opp08 { + opp-hz = /bits/ 64 <1956000000>; + opp-level = <8>; + clock-latency-ns = <135000>; + }; + opp09 { + opp-hz = /bits/ 64 <2316000000>; + opp-level = <9>; + clock-latency-ns = <140000>; + }; +#if 0 + /* Not available until CPU deep sleep is implemented */ + opp10 { + opp-hz = /bits/ 64 <2400000000>; + opp-level = <10>; + clock-latency-ns = <140000>; + turbo-mode; + }; +#endif + }; + soc { compatible = "simple-bus"; #address-cells = <2>; @@ -60,6 +133,12 @@ nonposted-mmio; ranges; + cpufreq: performance-controller@202f20000 { + compatible = "apple,t8010-cluster-cpufreq", "apple,t8103-cluster-cpufreq", "apple,cluster-cpufreq"; + reg = <0x2 0x02f20000 0 0x1000>; + #performance-domain-cells = <0>; + }; + serial0: serial@20a0c0000 { compatible = "apple,s5l-uart"; reg = <0x2 0x0a0c0000 0x0 0x4000>; |