[PATCH] mmc: dt: add host-off-card-on dt property
From: Wei Ni <hidden>
Date: 2013-07-11 09:16:42
Also in:
linux-mmc, linuxppc-dev, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Adrian Hunter, Linus Torvalds
Add "host-off-card-on" dt property and parse it to support the quirk SDHCI_QUIRK2_HOST_OFF_CARD_ON. Signed-off-by: Wei Ni <redacted> --- 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 85aada2..95ebe3e 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt@@ -28,6 +28,8 @@ Optional properties: - cap-mmc-highspeed: MMC high-speed timing is supported - cap-power-off-card: powering off the card is safe - cap-sdio-irq: enable SDIO IRQ signalling on this interface +- host-off-card-on: when resume, denote that card keeps power + but host controller does not, so that it will reset sdhci all. *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line polarity properties, we have to fix the meaning of the "normal" and "inverted"
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index cd0f1f6..b3730cc 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c@@ -89,6 +89,9 @@ void sdhci_get_of_property(struct platform_device *pdev) if (of_get_property(np, "no-1-8-v", NULL)) host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; + if (of_get_property(np, "host-off-card-on", NULL)) + host->quirks2 |= SDHCI_QUIRK2_HOST_OFF_CARD_ON; + if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc")) host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
--
1.7.9.5