[PATCH 8/8] mmc: sdhci-of-aspeed: Add sdr50 support
From: Cool Lee <hidden>
Date: 2025-06-15 03:58:35
Also in:
linux-arm-kernel, linux-mmc, lkml, openbmc
Subsystem:
aspeed sd/mmc driver, multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Andrew Jeffery, Ulf Hansson, Adrian Hunter, Linus Torvalds
Add support for SDR50 mode in the Aspeed SDHCI driver by setting capability shadow register. Signed-off-by: Cool Lee <redacted> --- drivers/mmc/host/sdhci-of-aspeed.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/mmc/host/sdhci-of-aspeed.c b/drivers/mmc/host/sdhci-of-aspeed.c
index 365c02215273..ec6833295b6a 100644
--- a/drivers/mmc/host/sdhci-of-aspeed.c
+++ b/drivers/mmc/host/sdhci-of-aspeed.c@@ -41,6 +41,7 @@ #define ASPEED_SDC_CAP1_1_8V (0 * 32 + 26) /* SDIO{14,24} */ #define ASPEED_SDC_CAP2_SDR104 (1 * 32 + 1) +#define ASPEED_SDC_CAP2_SDR50 (1 * 32 + 0) struct aspeed_sdc { struct clk *clk;
@@ -427,11 +428,17 @@ static int aspeed_sdhci_probe(struct platform_device *pdev) sdhci_get_of_property(pdev); if (of_property_read_bool(np, "mmc-hs200-1_8v") || + of_property_read_bool(np, "sd-uhs-sdr50") || of_property_read_bool(np, "sd-uhs-sdr104")) { aspeed_sdc_set_slot_capability(host, dev->parent, ASPEED_SDC_CAP1_1_8V, true, slot); } + if (of_property_read_bool(np, "sd-uhs-sdr50")) { + aspeed_sdc_set_slot_capability(host, dev->parent, ASPEED_SDC_CAP2_SDR50, + true, slot); + } + if (of_property_read_bool(np, "sd-uhs-sdr104")) { aspeed_sdc_set_slot_capability(host, dev->parent, ASPEED_SDC_CAP2_SDR104, true, slot);
--
2.34.1