[PATCH v2 05/13] DONOTMERGE: arm: dts: k3-j721e: u-boot overlay for TI tps6594 PMIC

[Jerome Neanne]

j721e board includes 2 instances of TPS6594:
- Primary PMIC
- Secondary PMIC

Add AVS class0 in u-boot SPL.
AVS is supported only on CPU rail: vdd_cpu_avs.
This rail is supplied by the primary PMIC: tps659413
This rail is supplied by a dual-phased buck: buck12.

Other PMICs rails are not AVS capable.

Each PMIC includes a Watchdog that is active by default at boot.
This would issue a platform reset unless pmic GPIO8 is driven
or this is handled by SW.
Watchdog driver is not required for identified use of this product.
This software disable inside u-boot avoids parasitic wd reset.
GPIO8 can then be used for other purpose.

Board documentation:
Link: https://www.ti.com/tool/J721EXSOMXEVM

Signed-off-by: Jerome Neanne <jneanne at baylibre.com>
---
 .../k3-j721e-common-proc-board-u-boot.dtsi    | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi b/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi
index 867ec2bb1a..a57d491689 100644
--- a/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi
+++ b/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi
@@ -79,6 +79,14 @@
 	chipid at 43000014 {
 		bootph-pre-ram;
 	};
+
+	mcu_i2c0: i2c at 40b00000 {
+		status = "okay";
+		tps65941_wd: tps65941-wd at 12 {
+			compatible = "ti,tps65941_watchdog";
+			reg = <0x12>;
+		};
+	};
 };
 
 &secure_proxy_main {
@@ -170,6 +178,19 @@
 
 &wkup_i2c0 {
 	bootph-pre-ram;
+	tps659413: tps659413 at 48 {
+		bootph-pre-ram;
+		compatible = "ti,tps659413";
+
+		regulators {
+			bootph-pre-ram;
+			bucka12_reg: buck12 {
+			};
+		};
+	};
+	tps659411: tps659411 at 4c {
+		compatible = "ti,tps659411";
+	};
 };
 
 &main_i2c0 {
-- 
2.34.1