[PATCH v2 1/5] mmc: host: sdhci-s3c: Add broken-voltage DT property for broken voltage quirk
From: Tomasz Figa <hidden>
Date: 2012-09-04 08:50:05
Also in:
linux-mmc, linux-samsung-soc
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, secure digital host controller interface (sdhci) driver, secure digital host controller interface (sdhci) samsung driver, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Adrian Hunter, Ben Dooks, Jaehoon Chung, Linus Torvalds
Some boards use fixed voltage regulator for vmmc supply (e.g. for eMMC memories). MMC_CAP2_BROKEN_VOLTAGE must be enabled for them to operate correctly. Cc: Ben Dooks <ben-linux@fluff.org> Cc: Chris Ball <redacted> CC: linux-mmc at vger.kernel.org Signed-off-by: Tomasz Figa <redacted> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> --- Documentation/devicetree/bindings/mmc/mmc.txt | 1 + drivers/mmc/host/sdhci-s3c.c | 3 +++ 2 files changed, 4 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 8a6811f..ecbde68 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt@@ -16,6 +16,7 @@ Optional properties: - wp-inverted: when present, polarity on the wp gpio line is inverted - non-removable: non-removable slot (like eMMC) - max-frequency: maximum operating clock frequency +- broken-voltage: vmmc regulator does not allow voltage control Example:
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index 445910e..39715b8 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c@@ -443,6 +443,9 @@ static int __devinit sdhci_s3c_parse_dt(struct device *dev, if (!ourhost->gpios) return -ENOMEM; + if (of_get_property(node, "broken-voltage", 0)) + pdata->host_caps2 |= MMC_CAP2_BROKEN_VOLTAGE; + /* get the card detection method */ if (of_get_property(node, "broken-cd", 0)) { pdata->cd_type = S3C_SDHCI_CD_NONE;
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1.7.12