From: Matthieu CASTET <matthieu.castet@parrot.com>
To: linux-mmc@vger.kernel.org
Cc: Giuseppe CAVALLARO <peppe.cavallaro@st.com>,
Chris Ball <cjb@laptop.org>, Dong Aisheng <b29396@freescale.com>
Subject: SDHCI DDR50 implies MMC DDR
Date: Fri, 18 Apr 2014 15:55:39 +0200 [thread overview]
Message-ID: <20140418155539.5d43a9c8@parrot.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 106 bytes --]
Hi,
shouldn't we add something like that do auto-detect MMC_CAP_1_8V_DDR on
sdhci controller ?
Matthieu
[-- Attachment #2: 0001-sdhci-UHS-DDR50-implies-MMC-DDR.patch --]
[-- Type: text/x-patch, Size: 937 bytes --]
>From f821501dada7041521fe80a5fe92bdc8b15f055b Mon Sep 17 00:00:00 2001
From: Matthieu CASTET <matthieu.castet@parrot.com>
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(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 9a79fc4..2b7478e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -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;
--
1.9.2
reply other threads:[~2014-04-18 13:55 UTC|newest]
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