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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org 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 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/renesas_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 = &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"); } + mux_state = devm_mux_state_get_optional_selected(&pdev->dev, NULL); + if (IS_ERR(mux_state)) + return PTR_ERR(mux_state); + host = tmio_mmc_host_alloc(pdev, mmc_data); if (IS_ERR(host)) return PTR_ERR(host); -- 2.43.0 -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy