mmc: pxa-mci: add DT bindings

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/Documentation/devicetree/bindings/mmc/pxa-mmc.txt b/Documentation/devicetree/bindings/mmc/pxa-mmc.txt
new file mode 100644 (file)
index 0000000..b7025de
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/pxa-mmc.txt
@@ -0,0 +1,25 @@
+* PXA MMC drivers
+
+Driver bindings for the PXA MCI (MMC/SDIO) interfaces
+
+Required properties:
+- compatible: Should be "marvell,pxa-mmc".
+- vmmc-supply: A regulator for VMMC
+
+Optional properties:
+- marvell,detect-delay-ms: sets the detection delay timeout in ms.
+- marvell,gpio-power: GPIO spec for the card power enable pin
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the pxa-mmc driver.
+
+Examples:
+
+mmc0: mmc@41100000 {
+       compatible = "marvell,pxa-mmc";
+       reg = <0x41100000 0x1000>;
+       interrupts = <23>;
+       cd-gpios = <&gpio 23 0>;
+       wp-gpios = <&gpio 24 0>;
+};
+

diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index cb2dc0e..11df800 100644 (file)
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -30,6 +30,9 @@
 #include <linux/regulator/consumer.h>
 #include <linux/gpio.h>
 #include <linux/gfp.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_device.h>
 
 #include <asm/sizes.h>
 
@@ -573,6 +576,50 @@ static irqreturn_t pxamci_detect_irq(int irq, void *devid)
        return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id pxa_mmc_dt_ids[] = {
+        { .compatible = "marvell,pxa-mmc" },
+        { }
+};
+
+MODULE_DEVICE_TABLE(of, pxa_mmc_dt_ids);
+
+static int __devinit pxamci_of_init(struct platform_device *pdev)
+{
+        struct device_node *np = pdev->dev.of_node;
+        struct pxamci_platform_data *pdata;
+        u32 tmp;
+
+        if (!np)
+                return 0;
+
+        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+        if (!pdata)
+                return -ENOMEM;
+
+       pdata->gpio_card_detect =
+               of_get_named_gpio(np, "cd-gpios", 0);
+       pdata->gpio_card_ro =
+               of_get_named_gpio(np, "wp-gpios", 0);
+
+       /* pxa-mmc specific */
+       pdata->gpio_power =
+               of_get_named_gpio(np, "pxa-mmc,gpio-power", 0);
+
+       if (of_property_read_u32(np, "pxa-mmc,detect-delay-ms", &tmp) == 0)
+               pdata->detect_delay_ms = tmp;
+
+        pdev->dev.platform_data = pdata;
+
+        return 0;
+}
+#else
+static int __devinit pxamci_of_init(struct platform_device *pdev)
+{
+        return 0;
+}
+#endif
+
 static int pxamci_probe(struct platform_device *pdev)
 {
        struct mmc_host *mmc;
@@ -580,6 +627,10 @@ static int pxamci_probe(struct platform_device *pdev)
        struct resource *r, *dmarx, *dmatx;
        int ret, irq, gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
 
+       ret = pxamci_of_init(pdev);
+       if (ret)
+               return ret;
+
        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        irq = platform_get_irq(pdev, 0);
        if (!r || irq < 0)
@@ -866,6 +917,7 @@ static struct platform_driver pxamci_driver = {
        .driver         = {
                .name   = DRIVER_NAME,
                .owner  = THIS_MODULE,
+               .of_match_table = of_match_ptr(pxa_mmc_dt_ids),
 #ifdef CONFIG_PM
                .pm     = &pxamci_pm_ops,
 #endif