linux-kernel - [PATCH 2/2] mmc: sdhci_am654: Add QUIRK2_TI_HISPD

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Message-ID: <20190329142202.15000-3-faiz_abbas@ti.com>
Date:   Fri, 29 Mar 2019 19:52:02 +0530
From:   Faiz Abbas <faiz_abbas@...com>
To:     <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>
CC:     <ulf.hansson@...aro.org>, <adrian.hunter@...el.com>,
        <faiz_abbas@...com>
Subject: [PATCH 2/2] mmc: sdhci_am654: Add QUIRK2_TI_HISPD_BIT

According to the AM654x Data Manual[1], the setup timing in lower speed
modes can only be met if the controller uses a falling edge data launch.

To ensure this, the HIGH_SPEED_ENA (HOST_CONTROL[2]) bit should be
cleared in default speed, SD high speed, MMC high speed, SDR12 and SDR25
speed modes.

Enable the SDHCI_QUIRK2_TI_HISPD_BIT quirk to facilitate this.

[1] http://www.ti.com/lit/gpn/am6546 Section 5.10.5.16.1

Signed-off-by: Faiz Abbas <faiz_abbas@...com>
---
 drivers/mmc/host/sdhci_am654.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index eea183e90f1b..739a91767d5a 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -172,7 +172,8 @@ static const struct sdhci_pltfm_data sdhci_am654_pdata = {
 	.ops = &sdhci_am654_ops,
 	.quirks = SDHCI_QUIRK_INVERTED_WRITE_PROTECT |
 		  SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
-	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+		   SDHCI_QUIRK2_TI_HISPD_BIT,
 };
 
 static int sdhci_am654_init(struct sdhci_host *host)
-- 
2.19.2