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

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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>
This commit is contained in:
Sascha Hauer
2015-03-24 14:45:04 +01:00
committed by Ulf Hansson
parent 9369c97cc7
commit 07bf2b54cd
2 changed files with 9 additions and 1 deletions
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4
Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
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@@ -17,6 +17,10 @@ Optional properties:
to select a proper data sampling window in case the clock quality is not good 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 due to signal path is too long on the board. Please refer to eSDHC/uSDHC
chapter, DLL (Delay Line) section in RM for details. 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: Examples:

6
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@@ -864,6 +864,7 @@ static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
#ifdef CONFIG_OF #ifdef CONFIG_OF
static int static int
sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
struct sdhci_host *host,
struct esdhc_platform_data *boarddata) struct esdhc_platform_data *boarddata)
{ {
struct device_node *np = pdev->dev.of_node; 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)) if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line))
boarddata->delay_line = 0; boarddata->delay_line = 0;
mmc_of_parse_voltage(np, &host->ocr_mask);
return 0; return 0;
} }
#else #else
static inline int static inline int
sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
struct sdhci_host *host,
struct esdhc_platform_data *boarddata) struct esdhc_platform_data *boarddata)
{ {
return -ENODEV; return -ENODEV;
@@ -999,7 +1003,7 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
host->ioaddr + ESDHC_TUNING_CTRL); host->ioaddr + ESDHC_TUNING_CTRL);
boarddata = &imx_data->boarddata; 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) { if (!host->mmc->parent->platform_data) {
dev_err(mmc_dev(host->mmc), "no board data!\n"); dev_err(mmc_dev(host->mmc), "no board data!\n");
err = -EINVAL; err = -EINVAL;