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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260225-rz-sdio-mux-v10-9-1ee44f2ea112@solid-run.com> References: <20260225-rz-sdio-mux-v10-0-1ee44f2ea112@solid-run.com> In-Reply-To: <20260225-rz-sdio-mux-v10-0-1ee44f2ea112@solid-run.com> To: Marc Kleine-Budde , Vincent Mailhol , Vinod Koul , Neil Armstrong , Peter Rosin , Aaro Koskinen , Andreas Kemnade , Kevin Hilman , Roger Quadros , Tony Lindgren , Janusz Krzysztofik , Vignesh R , Andi Shyti , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm , Wolfram Sang , Yoshihiro Shimoda Cc: Yazan Shhady , Jon Nettleton , Vladimir Oltean , Mikhail Anikin , linux-can@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Josua Mayer X-Mailer: b4 0.14.3 X-ClientProxiedBy: TL0P290CA0012.ISRP290.PROD.OUTLOOK.COM (2603:1096:950:5::12) To PAXPR04MB8749.eurprd04.prod.outlook.com (2603:10a6:102:21f::22) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: PAXPR04MB8749:EE_|AM8PR04MB7827:EE_|AM2PEPF0001C717:EE_|PAXPR04MB8490:EE_ X-MS-Office365-Filtering-Correlation-Id: 992ab04c-1c1f-4528-cf02-08de7461e9cc X-CLOUD-SEC-AV-Info: solidrun,office365_emails,sent,inline X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230040|376014|7416014|52116014|366016|1800799024|921020|38350700014; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: VfhasNDQAgIwgqY50ibNkAc0BOmyhef87k7ByFqZsFSSpfVBYiQpYqNFu41y4E+1cVgvaNJPzzv2YQvVH/ClXgJzsXCo2s4sA/DcPSSW4mL7jato5AD27i1q2oyFyS3MktA2QRXMK4ALv7KKi1qTVAI0ZdRbGMO0LDqTYrIHI8Epe6DoOMaPi/Z88fO5SlwXJzQ6IY9yfhi34HrRZN26pN36Vaco2joBzb3N0wK7iWeDHCOI5iuJHUEfo8s8u1IymDkHYZImqhUJeLhl0nEd7kXLDRXsUFyw9j9aKfeQQz322sbI7m2hDt1PUFF0uQ6AUgT3KAYSB7YQWiESYLARkru2VRKr+JxKH6UwBZCpiwWsnrTEPXbER44Nv2GfBvICxsHECniBCsJBFqRS+Wqt5hUozu0pfR2JB0FYgssTDT5SxbbFXjXup1ZLl586uUSE X-OriginatorOrg: solid-run.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Feb 2026 11:35:01.5357 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 992ab04c-1c1f-4528-cf02-08de7461e9cc X-MS-Exchange-CrossTenant-Id: a4a8aaf3-fd27-4e27-add2-604707ce5b82 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=a4a8aaf3-fd27-4e27-add2-604707ce5b82;Ip=[52.17.62.50];Helo=[eu-dlp.cloud-sec-av.com] X-MS-Exchange-CrossTenant-AuthSource: AM2PEPF0001C717.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB8490 Some hardware designs route data or control signals through a mux to support multiple devices on a single sdhi controller. In particular SolidRun RZ/G2L/G2LC/V2L System on Module use a mux for switching between soldered eMMC and an optional microSD on a carrier board, e.g. for development or provisioning. SD/SDIO/eMMC are not well suited for runtime switching between different cards, however boot-time selection is possible and useful - in particular considering dt overlays. Add support for an optional SD/SDIO/eMMC mux defined in dt, and select it during probe. Similar functionality already exists in other places, e.g. i2c-omap. Signed-off-by: Josua Mayer --- drivers/mmc/host/Kconfig | 1 + drivers/mmc/host/renesas_sdhi_core.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 6d79cc9a79e2..40046981d240 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -705,6 +705,7 @@ config MMC_TMIO_CORE =20 config MMC_SDHI tristate "Renesas SDHI SD/SDIO controller support" + depends on MULTIPLEXER || !MULTIPLEXER depends on SUPERH || ARCH_RENESAS || COMPILE_TEST depends on (RESET_CONTROLLER && REGULATOR) || !OF select MMC_TMIO_CORE diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesa= s_sdhi_core.c index 2a310a145785..f9ec78d699f4 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -1062,6 +1063,7 @@ int renesas_sdhi_probe(struct platform_device *pdev, struct regulator_dev *rdev; struct renesas_sdhi_dma *dma_priv; struct device *dev =3D &pdev->dev; + struct mux_state *mux_state; struct tmio_mmc_host *host; struct renesas_sdhi *priv; int num_irqs, irq, ret, i; @@ -1116,6 +1118,10 @@ int renesas_sdhi_probe(struct platform_device *pdev, "state_uhs"); } =20 + mux_state =3D devm_mux_state_get_optional_selected(&pdev->dev, NULL); + if (IS_ERR(mux_state)) + return PTR_ERR(mux_state); + host =3D tmio_mmc_host_alloc(pdev, mmc_data); if (IS_ERR(host)) return PTR_ERR(host); --=20 2.43.0