mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-27 14:52:34 -04:00
Code Issues Packages Projects Releases Wiki Activity

arm64: dts: ti: k3-am62a: 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 AM62Ax 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
to only OPP entries the variant supports. A table of all these variants
can be found in it's data sheet[0] for the AM62Ax 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/am62a3.pdf

Signed-off-by: Bryan Brattlof <bb@ti.com>
Signed-off-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/r/20241008132052.407994-2-d-gole@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Bryan Brattlof
2024-10-08 18:50:50 +05:30
committed by Vignesh Raghavendra
parent 881f5e9d80
commit aeedca4015
2 changed files with 56 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
View File

@@ -17,6 +17,11 @@ chipid: chipid@14 {
reg = <0x14 0x4>;
};
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>;

51
arch/arm64/boot/dts/ti/k3-am62a7.dtsi
View File

@@ -48,6 +48,8 @@ cpu0: cpu@0 {
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>;
};
cpu1: cpu@1 {
@@ -62,6 +64,8 @@ cpu1: cpu@1 {
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>;
};
cpu2: cpu@2 {
@@ -76,6 +80,8 @@ cpu2: cpu@2 {
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>;
};
cpu3: cpu@3 {
@@ -90,6 +96,51 @@ cpu3: cpu@3 {
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;
};
};