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[90.63.244.31]) by smtp.gmail.com with ESMTPSA id o126sm6802520wmo.1.2019.06.20.08.00.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 20 Jun 2019 08:00:35 -0700 (PDT) From: Neil Armstrong To: jbrunet@baylibre.com, khilman@baylibre.com Subject: [RFC/RFT 14/14] arm64: dts: meson-g12b-odroid-n2: enable DVFS Date: Thu, 20 Jun 2019 17:00:13 +0200 Message-Id: <20190620150013.13462-15-narmstrong@baylibre.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190620150013.13462-1-narmstrong@baylibre.com> References: <20190620150013.13462-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190620_080038_390126_28D340BD X-CRM114-Status: GOOD ( 13.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Neil Armstrong , martin.blumenstingl@googlemail.com, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Enable DVFS for the Odroid-N2 by setting the clock, OPP and supply for each cores of each CPU clusters. The first cluster uses the "VDDCPU_B" power supply, and the second cluster uses the "VDDCPU_A" power supply. Each power supply can achieve 0.73V to 1.01V using 2 distinct PWM outputs clocked at 800KHz with an inverse duty-cycle. DVFS has been tested by running the arm64 cpuburn at [1] and cycling between all the possible cpufreq translations of each cluster and checking the final frequency using the clock-measurer, script at [2]. [1] https://github.com/ssvb/cpuburn-arm/blob/master/cpuburn-a53.S [2] https://gist.github.com/superna9999/d4de964dbc0f84b7d527e1df2ddea25f Signed-off-by: Neil Armstrong --- .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 96 +++++++++++++++++++ 1 file changed, 96 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts index c3e0735e6d9f..0db1547bfb5a 100644 --- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts @@ -114,6 +114,44 @@ /* FIXME: actually controlled by VDDCPU_B_EN */ }; + vddcpu_a: regulator-vddcpu-a { + /* + * MP8756GD Regulator. + */ + compatible = "pwm-regulator"; + + regulator-name = "VDDCPU_A"; + regulator-min-microvolt = <721000>; + regulator-max-microvolt = <1022000>; + + vin-supply = <&main_12v>; + + pwms = <&pwm_ab 0 1250 0>; + pwm-dutycycle-range = <100 0>; + + regulator-boot-on; + regulator-always-on; + }; + + vddcpu_b: regulator-vddcpu-b { + /* + * Silergy SY8120B1ABC Regulator. + */ + compatible = "pwm-regulator"; + + regulator-name = "VDDCPU_B"; + regulator-min-microvolt = <721000>; + regulator-max-microvolt = <1022000>; + + vin-supply = <&main_12v>; + + pwms = <&pwm_AO_cd 1 1250 0>; + pwm-dutycycle-range = <100 0>; + + regulator-boot-on; + regulator-always-on; + }; + hub_5v: regulator-hub_5v { compatible = "regulator-fixed"; regulator-name = "HUB_5V"; @@ -245,6 +283,48 @@ status = "okay"; }; +&cpu0 { + cpu-supply = <&vddcpu_b>; + operating-points-v2 = <&cpu_opp_table_0>; + clocks = <&clkc CLKID_CPU_CLK>; + clock-latency = <50000>; +}; + +&cpu1 { + cpu-supply = <&vddcpu_b>; + operating-points-v2 = <&cpu_opp_table_0>; + clocks = <&clkc CLKID_CPU_CLK>; + clock-latency = <50000>; +}; + +&cpu100 { + cpu-supply = <&vddcpu_a>; + operating-points-v2 = <&cpub_opp_table_1>; + clocks = <&clkc CLKID_CPUB_CLK>; + clock-latency = <50000>; +}; + +&cpu101 { + cpu-supply = <&vddcpu_a>; + operating-points-v2 = <&cpub_opp_table_1>; + clocks = <&clkc CLKID_CPUB_CLK>; + clock-latency = <50000>; +}; + +&cpu102 { + cpu-supply = <&vddcpu_a>; + operating-points-v2 = <&cpub_opp_table_1>; + clocks = <&clkc CLKID_CPUB_CLK>; + clock-latency = <50000>; +}; + +&cpu103 { + cpu-supply = <&vddcpu_a>; + operating-points-v2 = <&cpub_opp_table_1>; + clocks = <&clkc CLKID_CPUB_CLK>; + clock-latency = <50000>; +}; + &ext_mdio { external_phy: ethernet-phy@0 { /* Realtek RTL8211F (0x001cc916) */ @@ -308,6 +388,22 @@ pinctrl-names = "default"; }; +&pwm_ab { + pinctrl-0 = <&pwm_a_e_pins>; + pinctrl-names = "default"; + clocks = <&xtal>; + clock-names = "clkin0"; + status = "okay"; +}; + +&pwm_AO_cd { + pinctrl-0 = <&pwm_ao_d_e_pins>; + pinctrl-names = "default"; + clocks = <&xtal>; + clock-names = "clkin1"; + status = "okay"; +}; + /* SD card */ &sd_emmc_b { status = "okay"; -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel