mmc: sdhci-esdhc-imx: support voltage-range property

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

2 files changed, 9 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
index 9046ba06c47a..415c5575cbf7 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
@@ -17,6 +17,10 @@ Optional properties:
   to select a proper data sampling window in case the clock quality is not good
   due to signal path is too long on the board. Please refer to eSDHC/uSDHC
   chapter, DLL (Delay Line) section in RM for details.
+- voltage-ranges : Specify the voltage range in case there are software
+  transparent level shifters on the outputs of the controller. Two cells are
+  required, first cell specifies minimum slot voltage (mV), second cell
+  specifies maximum slot voltage (mV). Several ranges could be specified.
 
 Examples:
 
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 9cce5cf18ebc..7ee831255f50 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -864,6 +864,7 @@ static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
 #ifdef CONFIG_OF
 static int
 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
+                         struct sdhci_host *host,
                          struct esdhc_platform_data *boarddata)
 {
         struct device_node *np = pdev->dev.of_node;
@@ -900,11 +901,14 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
         if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line))
                 boarddata->delay_line = 0;
 
+        mmc_of_parse_voltage(np, &host->ocr_mask);
+
         return 0;
 }
 #else
 static inline int
 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
+                         struct sdhci_host *host,
                          struct esdhc_platform_data *boarddata)
 {
         return -ENODEV;
@@ -999,7 +1003,7 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
                         host->ioaddr + ESDHC_TUNING_CTRL);
 
         boarddata = &imx_data->boarddata;
-        if (sdhci_esdhc_imx_probe_dt(pdev, boarddata) < 0) {
+        if (sdhci_esdhc_imx_probe_dt(pdev, host, boarddata) < 0) {
                 if (!host->mmc->parent->platform_data) {
                         dev_err(mmc_dev(host->mmc), "no board data!\n");
                         err = -EINVAL;