diff options
| author | Josua Mayer <josua@solid-run.com> | 2026-02-26 15:21:17 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2026-03-09 13:44:45 +0100 |
| commit | 3c080bb2639d7b17bf83ca561f60252774a77b37 (patch) | |
| tree | 0455d368a6d09036fa5e7e41a0df8398acf659ec /drivers/mmc | |
| parent | ce5c7c17e70640fc5635fd2252d0bdf4664d452b (diff) | |
mmc: host: renesas_sdhi_core: support selecting an optional mux
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 <josua@solid-run.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi_core.c | 6 |
1 files changed, 6 insertions, 0 deletions
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 <linux/mmc/mmc.h> #include <linux/mmc/slot-gpio.h> #include <linux/module.h> +#include <linux/mux/consumer.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/pinctrl-state.h> #include <linux/platform_data/tmio.h> @@ -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); |