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Mon, 15 Dec 2025 15:00:56 +0000 Received: from [IPV6:2001:861:4450:d360:6864:9326:2fe9:fe2] (unknown [IPv6:2001:861:4450:d360:6864:9326:2fe9:fe2]) (Authenticated sender: michael.opdenacker@rootcommit.com) by smtp.hostinger.com (smtp.hostinger.com) with ESMTPSA id 4dVNY05gtKz1y1d; Mon, 15 Dec 2025 15:00:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rootcommit.com; s=hostingermail-a; t=1765810853; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VX54jGJhAp746Z3Nrw5llPoeuIEu/ZFyKQgJmCUpMRA=; b=HHUjiuhhNQTmbq2DBQv4OMR/+yB7CNQ83Ik1r+nuof6XrCMuIMvUI+wL7hBz9N6Z2WTDXP 1v9gXbSO7udNOFSgYmDrTr3GEkIpaO7qRgNpxzGuKsjFaa6KSw2HnO0I5ohjNlGyJ6IYA4 fASlOi9t/I4b41uWxKb1klc7da/xm2ViGTqPEe5JYlwGAyzL5SNLwP6I2mAzksJ06R6JyN tOcWqnE0aLt5ZkM8FwbCsKxZWL+CEmsnVCbOW02BphBHIOQdoXCglRD9F9S3aBHgfx9vtY 8gDfBxGInTOxc6A/ujJ9XM5HYkAv4IR3O/7b+WvtFeg/VUWq/6fzkQHzVOfq2g== Message-ID: <4acfc5d8-d8d9-4c9b-99eb-09c7b82ddd04@rootcommit.com> MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: michael.opdenacker@rootcommit.com, Dan Carpenter , Binbin Zhou , linux-riscv@lists.infradead.org, spacemit@lists.linux.dev Subject: Re: [PATCH 1/2] riscv: dts: spacemit: Add i2c buses on OrangePi RV2 To: Yao Zi , Yixun Lan References: <20251215-k1-boards-add-mmc-v1-0-d68dc87d4aab@rootcommit.com> <20251215-k1-boards-add-mmc-v1-1-d68dc87d4aab@rootcommit.com> Content-Language: en-US, fr From: Michael Opdenacker Organization: Root Commit In-Reply-To: Date: Mon, 15 Dec 2025 15:00:52 +0000 (UTC) X-CM-Analysis: v=2.4 cv=GbNFnhXL c=1 sm=1 tr=0 ts=694022a5 a=w3a6Hyo9sJ87gWsMspevqA==:617 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=d70CFdQeAAAA:8 a=SAbbqCSLk9pJ1dRvB6kA:9 a=QEXdDO2ut3YA:10 a=NcxpMcIZDGm-g932nG_k:22 X-CM-Envelope: MS4xfFR5ZTrYsnaoVfFrnnokoA6EtN2YWmtTZiL7zIY7hohUBC0vuazeCMZZakxyFtPOK4YkeJBGv4JRVzjcE/ESmlmQoXxoRZoX+hqJ3jB7Ds5rLajKBMzj zbycn/uOfyKC/ocaY1r7D4MeRpYqu++lHfCxX/pveoIojEjwLOtWkjuTr1XG8vwS0m7IIh7nAHc+0HEXEg92p25xKiRJWrF5P4z3O8wtFPk43AzGYuUlOe2o peEklKw8OqABsuJVmXtngQ0OhSJKWN9Tn3VA/BanGgTcXlSAlL5UkIjoIWqqRxIl2doLLP7YeJpHkVwc249WtHLWa8/kdDYMrqCb+37fV+By1DRQFGuneA6f MRQhDqpgpss78mkRxRzxx4+nYDfFqQqzdXwdtRn27ABBrTa0ZLNb0A48fjKm+TlDr+jUq6gOa+5FsNauMEtP4hcr/+yod0Pp4uWnliJYF7+e5zagHltSSK7N 4UnrWXq4GRS3LLKknsPO+BDyCIFADOPvANZr0TydgZIW4jArSSCGTkSVQY8= X-AuthUser: michael.opdenacker@rootcommit.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251215_070100_385795_11D3C0A3 X-CRM114-Status: GOOD ( 11.31 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Hi Yao Thanks for your helpful questions! On 12/15/25 13:58, Yao Zi wrote: > On Mon, Dec 15, 2025 at 10:10:14AM +0000, Michael Opdenacker wrote: >> The OrangePi RV2 board exposes i2c2 and i2c8 buses >> from the Spacemit K1 SoC. >> >> This declares devices present on such buses, in particular >> the at24 eeprom to store MAC addresses and the regulators >> attached to the PMIC on i2c8. > This series is named as "Attempt to enable MMC on SpacemiT K1 boards", > what's the relationship between MMC and PMIC/I2C bus? You didn't make > use of any regulators in the second patch, either (which seems wrong to > me). I expected that declaring the regulators under the PMIC on i2c8 was enough to enable them, but I'm happy to be corrected. > > vmmc-supply specifies the card's power supply. And if you want to enable > SDR modes which mandate 1.8v IO level, vqmmc-supply is also necessary > for switching between 1.8v and 3.3v. I was thinking to get started without the SDR modes first, to make sure basic operation works first. Would that work? Would you have board examples to recommend, with an MMC controller operating in a way similar to the one on SpacemiT K1? Thanks again Michael. -- Michael Opdenacker Root Commit Yocto Project and OpenEmbedded Training course - Learn by doing: https://rootcommit.com/training/yocto/ _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv