admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

arm64: dts: ti: k3-am62p: add opp frequencies

Browse Source 
One power management technique available to the Cortex-A53s is their
ability to dynamically scale their frequency across the device's
Operating Performance Points (OPP)

The OPPs available for the Cortex-A53s on the AM62Px can vary based on
the silicon variant used. The SoC variant is encoded into the
WKUP_MMR0_WKUP0_CTRL_MMR0_JTAG_USER_ID register which is used to limit
the OPP entries the SoC supports. A table of all these variants can be
found in its data sheet[0] for the AM62Px processor family.

Add the OPP table into the SoC's fdti file along with the syscon node to
describe the WKUP_MMR0_WKUP0_CTRL_MMR0_JTAG_USER_ID register to detect
the SoC variant.

[0] https://www.ti.com/lit/ds/symlink/am62p-q1.pdf

Signed-off-by: Bryan Brattlof <bb@ti.com>
Signed-off-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/r/20241008132052.407994-4-d-gole@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Bryan Brattlof
2024-10-08 18:50:52 +05:30
committed by Vignesh Raghavendra
parent 5dae00dfaf
commit 76d855f058
2 changed files with 52 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm64/boot/dts/ti/k3-am62p-j722s-common-wakeup.dtsi
View File

@@ -20,6 +20,11 @@
bootph-all;
};
opp_efuse_table: syscon@18 {
compatible = "ti,am62-opp-efuse-table", "syscon";
reg = <0x18 0x4>;
};
cpsw_mac_syscon: ethernet-mac-syscon@200 {
compatible = "ti,am62p-cpsw-mac-efuse", "syscon";
reg = <0x200 0x8>;

47
arch/arm64/boot/dts/ti/k3-am62p5.dtsi
View File

@@ -47,6 +47,7 @@
d-cache-line-size = <64>;
d-cache-sets = <128>;
next-level-cache = <&l2_0>;
operating-points-v2 = <&a53_opp_table>;
clocks = <&k3_clks 135 0>;
};
@@ -62,6 +63,7 @@
d-cache-line-size = <64>;
d-cache-sets = <128>;
next-level-cache = <&l2_0>;
operating-points-v2 = <&a53_opp_table>;
clocks = <&k3_clks 136 0>;
};
@@ -77,6 +79,7 @@
d-cache-line-size = <64>;
d-cache-sets = <128>;
next-level-cache = <&l2_0>;
operating-points-v2 = <&a53_opp_table>;
clocks = <&k3_clks 137 0>;
};
@@ -92,10 +95,54 @@
d-cache-line-size = <64>;
d-cache-sets = <128>;
next-level-cache = <&l2_0>;
operating-points-v2 = <&a53_opp_table>;
clocks = <&k3_clks 138 0>;
};
};
a53_opp_table: opp-table {
compatible = "operating-points-v2-ti-cpu";
opp-shared;
syscon = <&opp_efuse_table>;
opp-200000000 {
opp-hz = /bits/ 64 <200000000>;
opp-supported-hw = <0x01 0x0007>;
clock-latency-ns = <6000000>;
};
opp-400000000 {
opp-hz = /bits/ 64 <400000000>;
opp-supported-hw = <0x01 0x0007>;
clock-latency-ns = <6000000>;
};
opp-600000000 {
opp-hz = /bits/ 64 <600000000>;
opp-supported-hw = <0x01 0x0007>;
clock-latency-ns = <6000000>;
};
opp-800000000 {
opp-hz = /bits/ 64 <800000000>;
opp-supported-hw = <0x01 0x0007>;
clock-latency-ns = <6000000>;
};
opp-1000000000 {
opp-hz = /bits/ 64 <1000000000>;
opp-supported-hw = <0x01 0x0006>;
clock-latency-ns = <6000000>;
};
opp-1250000000 {
opp-hz = /bits/ 64 <1250000000>;
opp-supported-hw = <0x01 0x0004>;
clock-latency-ns = <6000000>;
opp-suspend;
};
};
l2_0: l2-cache0 {
compatible = "cache";
cache-unified;