From e254c5aa5038f51b1c846519b8c5249bcc2ca33c Mon Sep 17 00:00:00 2001
From: Jon Hunter <jonathanh@nvidia.com>
Date: Mon, 9 Jan 2023 17:44:21 +0000
Subject: [PATCH] arm64: tegra: Add support for Tegra234 Tachometer

Add the tachometer device to the device-tree overlay for Tegra234 Jetson
AGX Orin.

Bug 3881007

Change-Id: I0ff75f5bd8dc80e90a90379cc0dea8d16e242575
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2840161
(cherry picked from commit 1498e7e65cdfdc1ff22ca6d24e0d63ed11311884)
Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/platform/t23x/concord-generic-dts/+/2864774
Tested-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/t23x-public-dts/+/2892501
Tested-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
---
 overlay/tegra234-jetson.dts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/overlay/tegra234-jetson.dts b/overlay/tegra234-jetson.dts
index edd3af9..f1eca6d 100644
--- a/overlay/tegra234-jetson.dts
+++ b/overlay/tegra234-jetson.dts
@@ -272,6 +272,21 @@
 
 				status = "okay";
 			};
+
+			tachometer@39c0000 {
+				compatible = "nvidia,pwm-tegra234-tachometer";
+				reg = <0x039c0000 0x10>;
+				interrupts = <GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
+				#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>;
+				upper-threshold = <0xfffff>;
+				lower-threshold = <0x0>;
+			};
 		};
 	};