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X-OriginatorOrg: solid-run.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jan 2026 09:21:24.4434 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: de9e4ee4-260b-49ca-a67b-08de58ce72bf 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: DB5PEPF00014B8C.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU4PR04MB12083 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. Reviewed-by: Geert Uytterhoeven Signed-off-by: Josua Mayer --- drivers/mmc/host/renesas_sdhi_core.c | 6 ++++++ 1 file changed, 6 insertions(+) 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