linux-kernel - [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

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Date:	Wed, 13 May 2015 16:20:46 +0800
From:	Yangbo Lu <yangbo.lu@...escale.com>
To:	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	<scottwood@...escale.com>
CC:	Yangbo Lu <yangbo.lu@...escale.com>
Subject: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

Enable interrupt mode to detect card instead of polling mode
for P1020/P4080/P5020/P5040/T1040 by removing the quirk
SDHCI_QUIRK_BROKEN_CARD_DETECTION. This could improve data
transferring performance and avoid the call trace caused by
polling card status sometime.

Signed-off-by: Yangbo Lu <yangbo.lu@...escale.com>
---
 drivers/mmc/host/sdhci-pltfm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index c5b01d6..62f4049 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -102,6 +102,13 @@ void sdhci_get_of_property(struct platform_device *pdev)
 		    of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
 			host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
+		if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
+			of_device_is_compatible(np, "fsl,p5020-esdhc") ||
+			of_device_is_compatible(np, "fsl,p4080-esdhc") ||
+			of_device_is_compatible(np, "fsl,p1020-esdhc") ||
+			of_device_is_compatible(np, "fsl,t1040-esdhc"))
+			host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+
 		clk = of_get_property(np, "clock-frequency", &size);
 		if (clk && size == sizeof(*clk) && *clk)
 			pltfm_host->clock = be32_to_cpup(clk);
-- 
2.1.0.27.g96db324

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