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linux-amlogic@lists.infradead.org Subject: Re: [PATCH 3/3] ARM: dts: amlogic: Add TCU Fernsehfee 3.0 Message-ID: References: <20250323-fernsehfee-v1-0-2621341cd37a@posteo.net> <20250323-fernsehfee-v1-3-2621341cd37a@posteo.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250407_160941_995408_E1FB9999 X-CRM114-Status: GOOD ( 28.43 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org T24gU3VuLCBBcHIgMDYsIDIwMjUgYXQgMTA6MzY6MThQTSArMDIwMCwgTWFydGluIEJsdW1lbnN0 aW5nbCB3cm90ZToKPiBPbiBUdWUsIEFwciAxLCAyMDI1IGF0IDM6MDDigK9QTSBKLiBOZXVzY2jD 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(posteo.de) with ESMTPSA id 4ZWlKD3rbZz6v0r; Tue, 8 Apr 2025 01:09:36 +0200 (CEST) Date: Mon, 7 Apr 2025 23:09:36 +0000 From: =?utf-8?Q?J=2E_Neusch=C3=A4fer?= To: Martin Blumenstingl Cc: =?utf-8?Q?J=2E_Neusch=C3=A4fer?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Jerome Brunet , Kevin Hilman , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org Subject: Re: [PATCH 3/3] ARM: dts: amlogic: Add TCU Fernsehfee 3.0 Message-ID: References: <20250323-fernsehfee-v1-0-2621341cd37a@posteo.net> <20250323-fernsehfee-v1-3-2621341cd37a@posteo.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250407_160942_312426_59E03C22 X-CRM114-Status: GOOD ( 29.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Apr 06, 2025 at 10:36:18PM +0200, Martin Blumenstingl wrote: > On Tue, Apr 1, 2025 at 3:00 PM J. Neuschäfer wrote: > > > > On Sun, Mar 30, 2025 at 11:10:28PM +0200, Martin Blumenstingl wrote: > > > Thanks for your patch! > > > > > > On Sun, Mar 23, 2025 at 1:38 PM J. Neuschäfer via B4 Relay > > > wrote: > > > [...] > > > > + eth_phy0: ethernet-phy@0 { > > > > + /* IC Plus IP101A (0x02430c54) */ > > > > + reg = <0>; > > > Does reg = <1> also work on your board? > > > 0 is the broadcast address. It's unfortunately something that we still > > > have incorrect in a lot of .dts files. > > > > Unfortunately not. I tried addresses 1 to 31 without success, which > > seems strange; my guess was that the PHY should respond to one of them. > > I get this error: > > > > # ip l set eth0 up > > [ 6.806847] meson6-dwmac c9410000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0 > > [ 6.810609] meson6-dwmac c9410000.ethernet eth0: __stmmac_open: Cannot attach to PHY (error: -19) > Thanks for testing. Let's keep it at zero then. > > > > > > > [...] > > > > +&i2c_AO { > > > > + status = "okay"; > > > > + pinctrl-0 = <&i2c_ao_pins>; > > > > + pinctrl-names = "default"; > > > > + > > > > + pmic@32 { > > > > + compatible = "ricoh,rn5t618"; > > > > + reg = <0x32>; > > > > + system-power-controller; > > > Here I'm a bit surprised: > > > Aren't some of the outputs used to drive VCCK (CPU power rail) and > > > VDDEE (everything else power rail, which also powers the GPU)? > > > > Unfortunately I don't have schematics and I wasn't able to trace the > > connections on the board because they're so tiny. So it's quite possible that > > you're right, but I can't be sure. > > > > Are there voltage sensors in the Meson8 SoC that I could use to establishs the > > relation between PMIC outputs and SoC supplies? > > There aren't any sensors (that I'm aware of). But you can check > /sys/kernel/debug/regulator/regulator_summary and compare the values > with the ones from arch/arm/boot/dts/amlogic/meson8m2-mxiii-plus.dts > Also the vendor u-boot and kernel logs may provide some information. The values in /sys/kernel/debug/regulator/regulator_summary do indeed match the values in meson8m2-mxiii-plus.dts: DCDC1 0 0 0 unknown 1100mV 0mA 0mV 0mV DCDC2 0 0 0 unknown 1150mV 0mA 0mV 0mV DCDC3 0 0 0 unknown 1500mV 0mA 0mV 0mV LDO1 0 0 0 unknown 2900mV 0mA 0mV 0mV LDO2 0 0 0 unknown 1800mV 0mA 0mV 0mV LDO3 0 0 0 unknown 1800mV 0mA 0mV 0mV LDO4 0 0 0 unknown 2850mV 0mA 0mV 0mV LDO5 0 0 0 unknown 1800mV 0mA 0mV 0mV LDORTC1 0 0 0 unknown 2700mV 0mA 0mV 0mV LDORTC2 0 0 0 unknown 900mV 0mA 0mV 0mV After I copy the regulator table from meson8m2-mxiii-plus.dts, I can indeed observe the effect of regulators being on/off. I will use that to further investigate how the regulators are used. The vendor u-boot/kernel aren't very useful, unfortunately. The downstream devicetree includes these settings: rn5t618 { status = "okay"; ddr_voltage = <1500000>; // 1.5V vddao_voltage = <1200000>; // 1.2V [...] }; The corresponding driver seems to associate ddr_voltage with DCDC2 and vddio_voltage with DCDC3, although this part of the code[1] is "#if 0"'d. [1] https://github.com/endlessm/linux-meson/blob/master/drivers/amlogic/power/ricoh/ricoh_pmu.c#L127 Best regards, J. Neuschäfer