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>
diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
index 9046ba06..415c557 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
@@ -17,6 +17,10 @@
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 9cce5cf..7ee8312 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -864,6 +864,7 @@
#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 @@
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 @@
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;