[PATCH v3 3/4] arm64: dts: ti: k3-am62p: add opp frequencies

[Bryan Brattlof]

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 at ti.com>
---
Changes from v2:
- Miscellaneous spelling fixes in commit body
- Link: https://lore.kernel.org/r/20240823-opp-v2-0-e2f67b37c299@ti.com
---
 .../boot/dts/ti/k3-am62p-j722s-common-wakeup.dtsi  |  5 +++
 arch/arm64/boot/dts/ti/k3-am62p5.dtsi              | 47 ++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-wakeup.dtsi
index 315d0092e7366..6f32135f00a55 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-wakeup.dtsi
@@ -20,6 +20,11 @@ chipid: chipid at 14 {
 			bootph-all;
 		};
 
+		opp_efuse_table: syscon at 18 {
+			compatible = "ti,am62-opp-efuse-table", "syscon";
+			reg = <0x18 0x4>;
+		};
+
 		cpsw_mac_syscon: ethernet-mac-syscon at 200 {
 			compatible = "ti,am62p-cpsw-mac-efuse", "syscon";
 			reg = <0x200 0x8>;
diff --git a/arch/arm64/boot/dts/ti/k3-am62p5.dtsi b/arch/arm64/boot/dts/ti/k3-am62p5.dtsi
index 41f479dca4555..140587d02e88e 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p5.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p5.dtsi
@@ -47,6 +47,7 @@ cpu0: cpu at 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>;
 		};
 
@@ -62,6 +63,7 @@ cpu1: cpu at 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>;
 		};
 
@@ -77,6 +79,7 @@ cpu2: cpu at 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>;
 		};
 
@@ -92,10 +95,54 @@ cpu3: cpu at 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;
+		};
+	};
+
 	l2_0: l2-cache0 {
 		compatible = "cache";
 		cache-unified;

-- 
2.46.0