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Mon, 02 Mar 2026 07:13:53 -0800 (PST) From: Iker Pedrosa Date: Mon, 02 Mar 2026 16:13:24 +0100 Subject: [PATCH 03/10] mmc: sdhci-of-k1: add regulator framework support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260302-orangepi-sd-card-uhs-v1-3-89c219973c0c@gmail.com> References: <20260302-orangepi-sd-card-uhs-v1-0-89c219973c0c@gmail.com> In-Reply-To: <20260302-orangepi-sd-card-uhs-v1-0-89c219973c0c@gmail.com> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Yixun Lan , Adrian Hunter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti 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, Iker Pedrosa X-Mailer: b4 0.14.2 Add regulator framework support for voltage switching operations. This enables proper PMIC control for UHS voltage switching between 3.3V and 1.8V signaling levels. - Add regulator supply parsing - Implement voltage switching callback - Enable mmc regulator framework integration Signed-off-by: Iker Pedrosa --- drivers/mmc/host/sdhci-of-k1.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-k1.c b/drivers/mmc/host/sdhci-of-k1.c index b703b78282ed8d89183c816477c149c0a565618a..c260cb89704ae7a25bec0f07831= d495553405bbd 100644 --- a/drivers/mmc/host/sdhci-of-k1.c +++ b/drivers/mmc/host/sdhci-of-k1.c @@ -216,6 +216,12 @@ static void spacemit_sdhci_pre_hs400_to_hs200(struct m= mc_host *mmc) SPACEMIT_SDHC_PHY_CTRL_REG); } =20 +static int spacemit_sdhci_start_signal_voltage_switch(struct mmc_host *mmc, + struct mmc_ios *ios) +{ + return sdhci_start_signal_voltage_switch(mmc, ios); +} + static inline int spacemit_sdhci_get_clocks(struct device *dev, struct sdhci_pltfm_host *pltfm_host) { @@ -291,6 +297,12 @@ static int spacemit_sdhci_probe(struct platform_device= *pdev) =20 host->mmc->caps |=3D MMC_CAP_NEED_RSP_BUSY; =20 + ret =3D mmc_regulator_get_supply(host->mmc); + if (ret) + dev_warn(dev, "Failed to get regulators: %d\n", ret); + + host->mmc_host_ops.start_signal_voltage_switch =3D spacemit_sdhci_start_s= ignal_voltage_switch; + ret =3D spacemit_sdhci_get_clocks(dev, pltfm_host); if (ret) goto err_pltfm; --=20 2.53.0