From nobody Mon Feb 9 16:21:17 2026 Received: from smtp.gentoo.org (woodpecker.gentoo.org [140.211.166.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 02AB5245019; Sun, 21 Dec 2025 08:21:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=140.211.166.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766305264; cv=none; b=eVIBByYkWlQgNp2pXs+wMTgFFcHnb3BnPPcDTiVM8HIEJR01lnx58EYtUGgfnMKlNnoEydLCu1ejdGf78yS9Sbc2Q9RwcVCyacq4ZJghCmDEf6xlg3xqN/oeFc9WciYopT7RydlfbVE1t7loSJ5jEu8wRoL3R40ul5AsQuukxoE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766305264; c=relaxed/simple; bh=vEorWhnLPp7YW7ZFYoqUseTPIMHGtfA1RoynKxTuZgY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=C8R2xOSH5XdNlBzz8L5X1hyZbxIkZ95T/sNlZQgb1F0X7M0yS+CW7ClIIG62LE9fs33AF1SMARWpDcJLE/wM6s2L1pcXshoX1X8rmGvZmH9ZqlBWH8NvtL6K8O/DWDmC4S5ed7rWHOEciMiGVL1iJiyT0Dso7zeZekxU43/V/mU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gentoo.org; spf=pass smtp.mailfrom=gentoo.org; arc=none smtp.client-ip=140.211.166.183 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gentoo.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gentoo.org Received: from [127.0.0.1] (unknown [116.232.18.222]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dlan) by smtp.gentoo.org (Postfix) with ESMTPSA id 65B60341083; Sun, 21 Dec 2025 08:20:55 +0000 (UTC) From: Yixun Lan Date: Sun, 21 Dec 2025 16:20:26 +0800 Subject: [PATCH 1/3] dt-bindings: mmc: spacemit,sdhci: add reset 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: <20251221-07-k1-sdhci-reset-v1-1-6780af7fa6e7@gentoo.org> References: <20251221-07-k1-sdhci-reset-v1-0-6780af7fa6e7@gentoo.org> In-Reply-To: <20251221-07-k1-sdhci-reset-v1-0-6780af7fa6e7@gentoo.org> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Philipp Zabel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Iker Pedrosa , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Yixun Lan X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1401; i=dlan@gentoo.org; h=from:subject:message-id; bh=vEorWhnLPp7YW7ZFYoqUseTPIMHGtfA1RoynKxTuZgY=; b=owEB6QIW/ZANAwAKATGq6kdZTbvtAcsmYgBpR63WXp1DZdTgz5ZeTce2A5ZzQyE+rrtOAkZ/u oLIpCmXWW6JAq8EAAEKAJkWIQS1urjJwxtxFWcCI9wxqupHWU277QUCaUet1hsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMSwyLDJfFIAAAAAALgAoaXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5 maWZ0aGhvcnNlbWFuLm5ldEI1QkFCOEM5QzMxQjcxMTU2NzAyMjNEQzMxQUFFQTQ3NTk0REJCRU QACgkQMarqR1lNu+1j4Q//dmpM5t9BNfPvoXxmOFjwe8bV9ABJWEn2i9xJO3pv8ReJIhaHDtIr/ reNUEaPgPDN+dOPwhQXxYyAfPv2MxKZcvUcjkVwomRU7y1nJSboEsBwoS0jCE3UuZecuWE76cgC 72tNyaRzuuMVTmOH91VbDgRKolVrukvjN1nwci2l38uzWJ9zxPfmLC16ikTXZ6Yht0ieaxEnBBL +JqPOuX8KW3ZY2lRUmAwStJNBbXZWRTVDc++YocGE2hXZxCoM4PZM87iz6sqb87EIT7K1I2BGeZ LR2t5rXH14KwFJXBlc4DuQdalZKM4hZKLRj87oMgF1UO8vGVV++FADLal6k1ADWIRp+sty3hyrU Dp5aSqmMf5XPY4Jy6/pEbI9n421fG23lI5OD/P3kTz0oiZsfjCM3bC2zyLxsiN4MZtQ4yOEQYCw JuB6qVUOCKNvQ+AU8gj4ZMDiQ3XZ5CKKZfzkKeUMs+Y8ENl+yxtw4UHyjlqLQuJU7DVpQXPb4QX h3btfjDN22bWZ2kQ4SS+KN3PH1W/MdxGMoE9yiEQeARfor9ei5nuLKf8pL2BtE8uXblncQnnrpG Tax51Cpe5JdTP5sPiP5qhfmEiunzCR/Qjyf1Z62IRg+0gMwuWPRWozYXRz8ynnMoqJXHC+iNOKj BoZgNdOMQY2b78ts2pGflvonmG4hL8= X-Developer-Key: i=dlan@gentoo.org; a=openpgp; fpr=50B03A1A5CBCD33576EF8CD7920C0DBCAABEFD55 The SpacemiT SDHCI controller has two reset lines, one connect to AXI bus which shared by all controllers, while another one connect to individual controller separately. Signed-off-by: Yixun Lan --- Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml | 14 +++++++++++= +++ 1 file changed, 14 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml b/Do= cumentation/devicetree/bindings/mmc/spacemit,sdhci.yaml index 13d9382058fb..322c69b056f4 100644 --- a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml +++ b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml @@ -32,12 +32,24 @@ properties: - const: core - const: io =20 + resets: + items: + - description: axi reset, connect to AXI bus, shared by all controll= ers + - description: sdh reset, connect to individual controller separately + + reset-names: + items: + - const: axi + - const: sdh + required: - compatible - reg - interrupts - clocks - clock-names + - resets + - reset-names =20 unevaluatedProperties: false =20 @@ -50,4 +62,6 @@ examples: interrupt-parent =3D <&plic>; clocks =3D <&clk_apmu 10>, <&clk_apmu 13>; clock-names =3D "core", "io"; + resets =3D <&syscon_apmu 2>, <&syscon_apmu 5>; + reset-names =3D "axi", "sdh"; }; --=20 2.52.0 From nobody Mon Feb 9 16:21:17 2026 Received: from smtp.gentoo.org (woodpecker.gentoo.org [140.211.166.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0FE5B244692; Sun, 21 Dec 2025 08:21:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=140.211.166.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766305270; cv=none; b=gk6ReFDWtYMyjuUQ6SWSj0FV7WX6OOmg8v5TJFUpgWFI8oX9zGn9+//lPJQ1nRfo+7gNswIx5UmaPGHNWCIxhkvY6yM4F/PZRwXgBw+LXXxJirICiLZ95mT5K/ZnvdQkDNaIl5V4AMwgJAsxqS9Xid65kZ6jdskc1RSyjGgP/64= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766305270; c=relaxed/simple; bh=Z3iYIOPo0NShh3wxil77tWS3egeNeNJQQuOhwb4xrME=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AR/12RVnUtI56m3Q8d5TtGkKqLKXxx3rCjwjY0UbpP7l7ni9gd/khrfZmQpioSdJ/mQA1yFv58BVrb6YyJoimMbfcreZwz5a4l0PqauX68EvGAwME1C2PGJsbb62NmnurxsbVLptBWU2cosrFxG4pNum2Mo/R3tJ2Vu6po5pKEM= ARC-Authentication-Results: i=1; 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a=openpgp; fpr=50B03A1A5CBCD33576EF8CD7920C0DBCAABEFD55 The SDHCI controller of SpacemiT K1 SoC requires two resets, add support to explicitly request the reset line and deassert during initialization phase. Signed-off-by: Yixun Lan --- drivers/mmc/host/sdhci-of-k1.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-k1.c b/drivers/mmc/host/sdhci-of-k1.c index 0cc97e23a2f9..f8330cff5b2a 100644 --- a/drivers/mmc/host/sdhci-of-k1.c +++ b/drivers/mmc/host/sdhci-of-k1.c @@ -15,6 +15,7 @@ #include #include #include +#include #include =20 #include "sdhci.h" @@ -223,6 +224,21 @@ static inline int spacemit_sdhci_get_clocks(struct dev= ice *dev, return 0; } =20 +static inline int spacemit_sdhci_get_resets(struct device *dev) +{ + struct reset_control *rst; + + rst =3D devm_reset_control_get_shared_deasserted(dev, "axi"); + if (IS_ERR(rst)) + return PTR_ERR(rst); + + rst =3D devm_reset_control_get_exclusive_deasserted(dev, "sdh"); + if (IS_ERR(rst)) + return PTR_ERR(rst); + + return 0; +} + static const struct sdhci_ops spacemit_sdhci_ops =3D { .get_max_clock =3D spacemit_sdhci_clk_get_max_clock, .reset =3D spacemit_sdhci_reset, @@ -284,6 +300,10 @@ static int spacemit_sdhci_probe(struct platform_device= *pdev) if (ret) goto err_pltfm; =20 + ret =3D spacemit_sdhci_get_resets(dev); + if (ret) + goto err_pltfm; + ret =3D sdhci_add_host(host); if (ret) goto err_pltfm; --=20 2.52.0 From nobody Mon Feb 9 16:21:17 2026 Received: from smtp.gentoo.org (woodpecker.gentoo.org [140.211.166.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2ED522356BA; Sun, 21 Dec 2025 08:21:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=140.211.166.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766305276; cv=none; b=ezsYnF63W5CPTuDiRFKO5gXSp+doVKuVJLv80KJ2X7oQ2u2QPz8v0K6hBcSKfEBs14OdXbiB5SEP/SQyYAPc5RN3nPce3hbta+DBuYRu4uZlZm8qQqXLQ+3MpoX7wffTvZ5P6py9yg5yZGlOGp2jfdKivRZJCoGaX+GfBRgE5Gw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766305276; c=relaxed/simple; bh=WfOYufxvp5VMhrnMCPsjsrXQPRkHTzjLxnD+Xz6ivlk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251221-07-k1-sdhci-reset-v1-3-6780af7fa6e7@gentoo.org> References: <20251221-07-k1-sdhci-reset-v1-0-6780af7fa6e7@gentoo.org> In-Reply-To: <20251221-07-k1-sdhci-reset-v1-0-6780af7fa6e7@gentoo.org> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Philipp Zabel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Iker Pedrosa , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Yixun Lan X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=752; i=dlan@gentoo.org; h=from:subject:message-id; bh=WfOYufxvp5VMhrnMCPsjsrXQPRkHTzjLxnD+Xz6ivlk=; b=owEB6QIW/ZANAwAKATGq6kdZTbvtAcsmYgBpR63dK1KxNfkTA25fu5p1T+xCzN4qwfXwAe4J7 WMogOHwkvuJAq8EAAEKAJkWIQS1urjJwxtxFWcCI9wxqupHWU277QUCaUet3RsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMSwyLDJfFIAAAAAALgAoaXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5 maWZ0aGhvcnNlbWFuLm5ldEI1QkFCOEM5QzMxQjcxMTU2NzAyMjNEQzMxQUFFQTQ3NTk0REJCRU QACgkQMarqR1lNu+3Zcg/+KvNt0xHyrpBNAUg57mCtQIGMt6rXzLXPjeoPurkxcNkzFOei4SoOs VnUaqbZD6CNGvuAFcJKYRd18DVFC6mUyXg7gc6m+QLKeBOvt/q/kpBBdKhb3l1JofDqdcQwGFNy q+FOmDfD6Jc9DVco5mQrDNZdrPqBbqbJVISXwY6PD0uFtZ1bn6krrQfyQ27pgq9SiYDmBDzfeIz VJIaQBFwu6D5ywPo0256sxC3ge2H+uc3LixzaiDCTR3qVWCkMVSF31Q62O4jvLWV5gjVn7ftf3c F/RCTxKkzXYbRW43laemjgTvYZSMYYQhrUabakrznVhGwpGVqeLyDxIRRJR+BaaA/6HEytccX9A 4FXKC1Q4YL13uVtTupne6Mhm70WeR8xbf9Rh1h37MDZU75fTYwqRUZ33zVfH2VoM4ryhrMoTF2/ WEl2Sg/+/DuSgElappnPcG5Zx+rrm3VqfOPlJaa6N6jg6lCx2G+ircMvpC/45GLgcnsnXqGcVtD MaNboQbYzc8J1KAzX3fpKjPxTzAXRESHiNzubrrjzk1MLTq/N8nMflikmt7lGGsy2VUuom6aK1R zhT403/ONYUY5PqnNbh2IK0RYV8PvCcI2WG+miBieWGhDv96Sc2a4a+N+/Q7qdP3pPqWendVxt6 NNM4VuMeF7RxFp1x4TlK0+p60fvazg= X-Developer-Key: i=dlan@gentoo.org; a=openpgp; fpr=50B03A1A5CBCD33576EF8CD7920C0DBCAABEFD55 Request two reset line explicitly for SDHCI controller. Signed-off-by: Yixun Lan --- arch/riscv/boot/dts/spacemit/k1.dtsi | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spa= cemit/k1.dtsi index 7818ca4979b6..7dd41d6dcb85 100644 --- a/arch/riscv/boot/dts/spacemit/k1.dtsi +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi @@ -984,6 +984,9 @@ emmc: mmc@d4281000 { clocks =3D <&syscon_apmu CLK_SDH_AXI>, <&syscon_apmu CLK_SDH2>; clock-names =3D "core", "io"; + resets =3D <&syscon_apmu RESET_SDH_AXI>, + <&syscon_apmu RESET_SDH2>; + reset-names =3D "axi", "sdh"; interrupts =3D <101>; status =3D "disabled"; }; --=20 2.52.0