From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rajkumar Rampelli Subject: [PATCH V2 4/9] arm64: tegra: Add Tachometer Controller on Tegra186 Date: Wed, 21 Mar 2018 10:10:39 +0530 Message-ID: <1521607244-29734-5-git-send-email-rrajk@nvidia.com> References: <1521607244-29734-1-git-send-email-rrajk@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1521607244-29734-1-git-send-email-rrajk@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: robh+dt@kernel.org, mark.rutland@arm.com, thierry.reding@gmail.com, jonathanh@nvidia.com, jdelvare@suse.com, linux@roeck-us.net, corbet@lwn.net, catalin.marinas@arm.com, will.deacon@arm.com, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, pombredanne@nexb.com, mmaddireddy@nvidia.com, mperttunen@nvidia.com, arnd@arndb.de, timur@codeaurora.org, andy.gross@linaro.org, xuwei5@hisilicon.com, elder@linaro.org, heiko@sntech.de, krzk@kernel.org, ard.biesheuvel@linaro.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ldewangan@nvidia.com, rrajk@nvidia.com List-Id: devicetree@vger.kernel.org The NVIDIA Tegra186 SoC has a Tachometer Controller that analyzes the PWM signal of a Fan and reports the period value through pwm interface. Signed-off-by: Rajkumar Rampelli --- V2: Renamed clock-names/reset-names dt properties values to "tachometer" Renamed compatible property value to "nvidia-tegra186-pwm-tachometer" arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts | 5 +++++ arch/arm64/boot/dts/nvidia/tegra186.dtsi | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts index bd5305a..13c3e59 100644 --- a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts +++ b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts @@ -172,4 +172,9 @@ vin-supply = <&vdd_5v0_sys>; }; }; + + tachometer@39c0000 { + nvidia,pulse-per-rev = <2>; + nvidia,capture-window-len = <2>; + }; }; diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi index 731cd01..19e1afc 100644 --- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi @@ -1042,4 +1042,15 @@ reset-names = "pwm"; status = "disabled"; }; + + tegra_tachometer: tachometer@39c0000 { + compatible = "nvidia,tegra186-pwm-tachometer"; + reg = <0x0 0x039c0000 0x0 0x10>; + #pwm-cells = <2>; + clocks = <&bpmp TEGRA186_CLK_TACH>; + clock-names = "tachometer"; + resets = <&bpmp TEGRA186_RESET_TACH>; + reset-names = "tachometer"; + status = "disabled"; + }; }; -- 2.1.4