@@ -61,6 +61,8 @@ o ` ~~~~\___/~~~~ ` controller in FPGA is ,.`
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/mod_devicetable.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
static void bgpio_write8(void __iomem *reg, unsigned long data)
{
@@ -569,6 +571,59 @@ static void __iomem *bgpio_map(struct platform_device *pdev,
return devm_ioremap_resource(&pdev->dev, r);
}
+#ifdef CONFIG_OF
+static const struct of_device_id bgpio_of_match[] = {
+ { .compatible = "basic-mmio-gpio" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, bgpio_of_match);
+
+static struct bgpio_pdata *bgpio_parse_dt(struct device *dev,
+ unsigned long *flags)
+{
+ struct bgpio_pdata *pdata;
+ int err;
+
+ if (!of_match_node(bgpio_of_match, dev->of_node))
+ return NULL;
+
+ pdata = devm_kzalloc(dev, sizeof(struct bgpio_pdata),
+ GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ err = of_property_read_u32(dev->of_node, "ngpio", &pdata->ngpio);
+ if (err && err != -EINVAL)
+ return ERR_PTR(err);
+
+ if (of_device_is_big_endian(dev->of_node))
+ *flags |= BGPIOF_BIG_ENDIAN_BYTE_ORDER;
+
+ if (of_property_read_bool(dev->of_node, "unreadable-reg-set"))
+ *flags |= BGPIOF_UNREADABLE_REG_SET;
+
+ if (of_property_read_bool(dev->of_node, "unreadable-reg-dir"))
+ *flags |= BGPIOF_UNREADABLE_REG_DIR;
+
+ if (of_property_read_bool(dev->of_node, "big-endian-byte-order"))
+ *flags |= BGPIOF_BIG_ENDIAN;
+
+ if (of_property_read_bool(dev->of_node, "read-output-reg-set"))
+ *flags |= BGPIOF_READ_OUTPUT_REG_SET;
+
+ if (of_property_read_bool(dev->of_node, "no-output"))
+ *flags |= BGPIOF_NO_OUTPUT;
+
+ return pdata;
+}
+#else
+static struct bgpio_pdata *bgpio_parse_dt(struct device *dev,
+ unsigned long *flags)
+{
+ return NULL;
+}
+#endif /* CONFIG_OF */
+
static int bgpio_pdev_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -579,10 +634,18 @@ static int bgpio_pdev_probe(struct platform_device *pdev)
void __iomem *dirout;
void __iomem *dirin;
unsigned long sz;
- unsigned long flags = pdev->id_entry->driver_data;
+ unsigned long flags = 0;
int err;
struct gpio_chip *gc;
- struct bgpio_pdata *pdata = dev_get_platdata(dev);
+ struct bgpio_pdata *pdata;
+
+ pdata = bgpio_parse_dt(dev, &flags);
+ if (IS_ERR(pdata)) {
+ return PTR_ERR(pdata);
+ } else if (!pdata) {
+ pdata = dev_get_platdata(dev);
+ flags = pdev->id_entry->driver_data;
+ }
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
if (!r)
@@ -646,6 +709,9 @@ MODULE_DEVICE_TABLE(platform, bgpio_id_table);
static struct platform_driver bgpio_driver = {
.driver = {
.name = "basic-mmio-gpio",
+#ifdef CONFIG_OF
+ .of_match_table = of_match_ptr(bgpio_of_match),
+#endif
},
.id_table = bgpio_id_table,
.probe = bgpio_pdev_probe,