From 0d010396573adcf54ca84eac6229b7713fd2acbb Mon Sep 17 00:00:00 2001
From: Sandipan Patra <spatra@nvidia.com>
Date: Tue, 13 Sep 2022 09:42:33 +0530
Subject: [PATCH] arm64: dts: Add dt to enable tegra tachometer

Tegra234 tachometer supports FAN speed in rpm.
This change is added to enable tachometer module.

Bug 3771589

Change-Id: Iec98e32c50bb43f47eb64af41a8d25c6175f96f1
Signed-off-by: Sandipan Patra <spatra@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2775691
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
---
 .../boot/dts/nvidia/tegra234-soc-overlay.dtsi      | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra234-soc-overlay.dtsi b/arch/arm64/boot/dts/nvidia/tegra234-soc-overlay.dtsi
index a405aa76..ad5c4379 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234-soc-overlay.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234-soc-overlay.dtsi
@@ -184,6 +184,20 @@
 			rtc@c2a0000 {
 				status = "okay";
 			};
+
+			tachometer@39c0000 {
+				compatible = "nvidia,pwm-tegra234-tachometer";
+				reg = <0x039c0000 0x10>;
+				#pwm-cells = <2>;
+				clocks = <&bpmp TEGRA234_CLK_TACH0>;
+				clock-names = "tach";
+				resets = <&bpmp TEGRA234_RESET_TACH0>;
+				reset-names = "tach";
+				pulse-per-rev = <2>;
+				capture-window-length = <2>;
+				disable-clk-gate;
+				status = "okay";
+			};
 		};
 	};