From mboxrd@z Thu Jan 1 00:00:00 1970 From: rrajk@nvidia.com (Rajkumar Rampelli) Date: Wed, 21 Mar 2018 10:10:39 +0530 Subject: [PATCH V2 4/9] arm64: tegra: Add Tachometer Controller on Tegra186 In-Reply-To: <1521607244-29734-1-git-send-email-rrajk@nvidia.com> References: <1521607244-29734-1-git-send-email-rrajk@nvidia.com> Message-ID: <1521607244-29734-5-git-send-email-rrajk@nvidia.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 at 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 at 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