[PATCH 2/5] mmc: sdhci-esdhc-imx: introduce function for parsing platform_data

[s.hauer@pengutronix.de (Sascha Hauer)]

As a first step to separate the platform_data code from the
devicetree code add a function to parse the boarddata. Also
change the argument of the dt probe function from
struct esdhc_platform_data * to struct pltfm_imx_data *imx_data
which makes it possible to get struct esdhc_platform_data out
of the devicetree probing path.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mmc/host/sdhci-esdhc-imx.c | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index d530820..f6f7a45 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -901,8 +901,9 @@ 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 esdhc_platform_data *boarddata)
+			 struct pltfm_imx_data *imx_data)
 {
+	struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 	struct device_node *np = pdev->dev.of_node;
 
 	if (!np)
@@ -942,12 +943,28 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
 #else
 static inline int
 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
-			 struct esdhc_platform_data *boarddata)
+			 struct pltfm_imx_data *imx_data)
 {
 	return -ENODEV;
 }
 #endif
 
+static int
+sdhci_esdhc_imx_probe_boarddata(struct platform_device *pdev,
+			 struct pltfm_imx_data *imx_data)
+{
+	struct esdhc_platform_data *pdata = pdev->dev.platform_data;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "no boarddata\n");
+		return -EINVAL;
+	}
+
+	imx_data->boarddata = *pdata;
+
+	return 0;
+}
+
 static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 {
 	const struct of_device_id *of_id =
@@ -1037,14 +1054,10 @@ 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 (!host->mmc->parent->platform_data) {
-			dev_err(mmc_dev(host->mmc), "no board data!\n");
-			err = -EINVAL;
+	if (sdhci_esdhc_imx_probe_dt(pdev, imx_data) < 0) {
+		err = sdhci_esdhc_imx_probe_boarddata(pdev, imx_data);
+		if (err)
 			goto disable_clk;
-		}
-		imx_data->boarddata = *((struct esdhc_platform_data *)
-					host->mmc->parent->platform_data);
 	}
 
 	imx_data->f_max = clk_get_rate(imx_data->clk_per);
-- 
2.0.0.rc0