linux-kernel - [PATCH] mmc: dt: Add property for broken hs200 quirk

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Date:	Fri, 12 Dec 2014 11:28:36 -0800
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Ulf Hansson <ulf.hansson@...aro.org>,
	Anton Vorontsov <anton@...msg.org>,
	Chris Ball <chris@...ntf.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Grant Likely <grant.likely@...aro.org>
CC:	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:SECURE DIGITAL HO..." <linux-mmc@...r.kernel.org>
Subject: [PATCH] mmc: dt: Add property for broken hs200 quirk

Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
---
 Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++
 drivers/mmc/host/sdhci-pltfm.c                | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index b52628b..04f80ef 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -22,6 +22,8 @@ Optional properties:
 - wp-inverted: when present, polarity on the WP line is inverted. See the note
   below for the case, when a GPIO is used for the WP line
 - max-frequency: maximum operating clock frequency
+- broken-hs200: when present, denotes that eMMC HS200 modes are not supported on
+  this system, even if the controller claims it is.
 - no-1-8-v: when present, denotes that 1.8v card voltage is not supported on
   this system, even if the controller claims it is.
 - cap-sd-highspeed: SD high-speed timing is supported
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index c5b01d6..570837f 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -90,6 +90,9 @@ void sdhci_get_of_property(struct platform_device *pdev)
 		if (of_get_property(np, "broken-cd", NULL))
 			host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
 
+		if (of_get_property(np, "broken-hs200", NULL))
+			host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
+
 		if (of_get_property(np, "no-1-8-v", NULL))
 			host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
 
-- 
1.8.2.2

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