SDHCI DDR50 implies MMC DDR

PATCH Matthieu CASTET 1 participant 1 message Apr 18, 2014

Subsystems (2)

MMC, SD and SDIO Secure digital host controller interface (SDHCI) driver

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Matthieu CASTET

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2014-04-18 13:55 UTC #0 lore raw

Hi,

shouldn't we add something like that do auto-detect MMC_CAP_1_8V_DDR on sdhci controller ?

Matthieu

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From f821501dada7041521fe80a5fe92bdc8b15f055b Mon Sep 17 00:00:00 2001

From: Matthieu CASTET <[email protected]>
Date: Fri, 18 Apr 2014 15:49:05 +0200
Subject: [PATCH] sdhci : UHS DDR50 implies MMC DDR

---
 drivers/mmc/host/sdhci.c | 5 +++++
 1 file changed, 5 insertions(+)

drivers/mmc/host/sdhci.c +5 -0

index 9a79fc4..2b7478e 100644
@@ -2971,6 +2971,11 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (caps[0] & SDHCI_CAN_DO_HISPD)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
 
+	/* DDR50 implies MMC DDR at 1.8 or 3.3 */
+	if ((caps[1] & SDHCI_SUPPORT_DDR50) &&
+		!(host->quirks2 & SDHCI_QUIRK2_BROKEN_DDR50))
+		mmc->caps |= MMC_CAP_1_8V_DDR;
+
 	if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
 	    !(host->mmc->caps & MMC_CAP_NONREMOVABLE))
 		mmc->caps |= MMC_CAP_NEEDS_POLL;

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