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Commit 07bf2b54 authored by Sascha Hauer's avatar Sascha Hauer Committed by Ulf Hansson
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mmc: sdhci-esdhc-imx: support voltage-range property 



Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 9369c97c

Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt

+4 −0
Original line number Diff line number Diff line
@@ -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:

drivers/mmc/host/sdhci-esdhc-imx.c

+5 −1
Original line number Diff line number Diff line
@@ -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;