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Mon, 09 Mar 2026 04:40:28 -0700 (PDT) From: Iker Pedrosa Date: Mon, 09 Mar 2026 12:40:11 +0100 Subject: [PATCH v2 1/7] mmc: sdhci-of-k1: enable essential clock infrastructure for SD operation 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: <20260309-orangepi-sd-card-uhs-v2-1-5bb2b574df5d@gmail.com> References: <20260309-orangepi-sd-card-uhs-v2-0-5bb2b574df5d@gmail.com> In-Reply-To: <20260309-orangepi-sd-card-uhs-v2-0-5bb2b574df5d@gmail.com> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , 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, Iker Pedrosa X-Mailer: b4 0.14.2 Ensure SD card pins receive clock signals by enabling pad clock generation and overriding automatic clock gating. Required for all SD operation modes. Signed-off-by: Iker Pedrosa --- drivers/mmc/host/sdhci-of-k1.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-k1.c b/drivers/mmc/host/sdhci-of-k1.c index 0cc97e23a2f9c7b2f9376318a8a7ebb860571504..585c7eca6ebf253aac466dd37ce= f029deb63f692 100644 --- a/drivers/mmc/host/sdhci-of-k1.c +++ b/drivers/mmc/host/sdhci-of-k1.c @@ -20,6 +20,13 @@ #include "sdhci.h" #include "sdhci-pltfm.h" =20 +#define SPACEMIT_SDHC_OP_EXT_REG 0x108 +#define SDHC_OVRRD_CLK_OEN BIT(11) +#define SDHC_FORCE_CLK_ON BIT(12) + +#define SPACEMIT_SDHC_LEGACY_CTRL_REG 0x10C +#define SDHC_GEN_PAD_CLK_ON BIT(6) + #define SPACEMIT_SDHC_MMC_CTRL_REG 0x114 #define SDHC_MISC_INT_EN BIT(1) #define SDHC_MISC_INT BIT(2) @@ -100,6 +107,12 @@ static void spacemit_sdhci_reset(struct sdhci_host *ho= st, u8 mask) =20 if (!(host->mmc->caps2 & MMC_CAP2_NO_MMC)) spacemit_sdhci_setbits(host, SDHC_MMC_CARD_MODE, SPACEMIT_SDHC_MMC_CTRL_= REG); + + spacemit_sdhci_setbits(host, SDHC_GEN_PAD_CLK_ON, SPACEMIT_SDHC_LEGACY_CT= RL_REG); + + if (host->mmc->caps2 & MMC_CAP2_NO_MMC) + spacemit_sdhci_setbits(host, SDHC_OVRRD_CLK_OEN | SDHC_FORCE_CLK_ON, + SPACEMIT_SDHC_OP_EXT_REG); } =20 static void spacemit_sdhci_set_uhs_signaling(struct sdhci_host *host, unsi= gned int timing) --=20 2.53.0