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([2001:1970:3847:e000:4c82:63a9:39e9:5c17]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-89a65beb4b3sm19327296d6.14.2026.03.11.11.27.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Mar 2026 11:27:46 -0700 (PDT) Message-ID: <8e91c86d-ea41-4535-a7cd-5b602c546cb7@baylibre.com> Date: Wed, 11 Mar 2026 14:27:42 -0400 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Trevor Gamblin Subject: Re: [PATCH v2 6/7] riscv: dts: spacemit: k1-orangepi-rv2: add PMIC and power infrastructure To: Iker Pedrosa , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan Cc: Michael Opdenacker , Javier Martinez Canillas , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org References: <20260309-orangepi-sd-card-uhs-v2-0-5bb2b574df5d@gmail.com> <20260309-orangepi-sd-card-uhs-v2-6-5bb2b574df5d@gmail.com> Content-Language: en-US In-Reply-To: <20260309-orangepi-sd-card-uhs-v2-6-5bb2b574df5d@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, On 2026-03-09 07:40, Iker Pedrosa wrote: > Add Spacemit P1 PMIC configuration and board power infrastructure for > voltage regulation support. > > - Add board power regulators (12V input, 4V rail) > - Enable I2C8 for PMIC communication > - Configure PMIC with buck4 (vmmc) and aldo1 (vqmmc) regulators > - Set up regulator constraints for SD card operation > > Signed-off-by: Iker Pedrosa > --- > arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 48 ++++++++++++++++++++++++ > 1 file changed, 48 insertions(+) > > diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts > index 7b7331cb3c726f11d597f81917f3a3f5fc21e1b9..414b03f5e6480f05f5d7eeaaa0afb4e86425ae36 100644 > --- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts > +++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts > @@ -19,6 +19,25 @@ aliases { > ethernet1 = ð1; > }; > > + reg_dc_in: dc-in-12v { > + compatible = "regulator-fixed"; > + regulator-name = "dc_in_12v"; > + regulator-min-microvolt = <12000000>; > + regulator-max-microvolt = <12000000>; > + regulator-boot-on; > + regulator-always-on; > + }; > + Is this the correct voltage? I don't see a 12V rail in the RV2's datasheet, and the board's specifications only indicate a 5V USB-C input. > + reg_vcc_4v: vcc-4v { > + compatible = "regulator-fixed"; > + regulator-name = "vcc_4v"; > + regulator-min-microvolt = <4000000>; > + regulator-max-microvolt = <4000000>; > + regulator-boot-on; > + regulator-always-on; > + vin-supply = <®_dc_in>; > + }; > + > chosen { > stdout-path = "serial0"; > }; > @@ -92,3 +111,32 @@ &uart0 { > pinctrl-0 = <&uart0_2_cfg>; > status = "okay"; > }; > + > +&i2c8 { > + pinctrl-names = "default"; > + pinctrl-0 = <&i2c8_cfg>; > + status = "okay"; > + > + pmic@41 { > + compatible = "spacemit,p1"; > + reg = <0x41>; > + interrupts = <64>; > + vin-supply = <®_vcc_4v>; > + > + regulators { > + sd_vmmc: buck4 { > + regulator-min-microvolt = <500000>; > + regulator-max-microvolt = <3300000>; > + regulator-ramp-delay = <5000>; > + regulator-always-on; > + }; > + > + sd_vqmmc: aldo1 { > + regulator-min-microvolt = <500000>; > + regulator-max-microvolt = <3400000>; > + regulator-boot-on; > + regulator-always-on; > + }; > + }; > + }; > +}; >