6 files changed, 93 insertions, 0 deletions
diff --git a/drivers/staging/board/Kconfig b/drivers/staging/board/Kconfig
new file mode 100644
index 000000000000..7eda0b8b7aab
--- /dev/null
+++ b/drivers/staging/board/Kconfig
@@ -0,0 +1,9 @@
+config STAGING_BOARD
+	boolean "Staging Board Support"
+	depends on OF_ADDRESS
+	depends on BROKEN
+	help
+	  Select to enable per-board staging support code.
+
+	  If in doubt, say N here.
+
diff --git a/drivers/staging/board/Makefile b/drivers/staging/board/Makefile
new file mode 100644
index 000000000000..65d39ecfad63
--- /dev/null
+++ b/drivers/staging/board/Makefile
@@ -0,0 +1,2 @@
+obj-y	:= board.o
+obj-$(CONFIG_ARCH_EMEV2)      += kzm9d.o
diff --git a/drivers/staging/board/TODO b/drivers/staging/board/TODO
new file mode 100644
index 000000000000..8db70e10aa67
--- /dev/null
+++ b/drivers/staging/board/TODO
@@ -0,0 +1,2 @@
+* replace platform device code with DT nodes once the driver supports DT
+* remove staging board code when no more platform devices are needed
diff --git a/drivers/staging/board/board.c b/drivers/staging/board/board.c
new file mode 100644
index 000000000000..6050fbdfd31f
--- /dev/null
+++ b/drivers/staging/board/board.c
@@ -0,0 +1,41 @@
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include "board.h"
+
+static bool find_by_address(u64 base_address)
+{
+	struct device_node *dn = of_find_all_nodes(NULL);
+	struct resource res;
+
+	while (dn) {
+		if (of_can_translate_address(dn)
+		    && !of_address_to_resource(dn, 0, &res)) {
+			if (res.start == base_address) {
+				of_node_put(dn);
+				return true;
+			}
+		}
+		dn = of_find_all_nodes(dn);
+	}
+
+	return false;
+}
+
+bool __init board_staging_dt_node_available(const struct resource *resource,
+					    unsigned int num_resources)
+{
+	unsigned int i;
+
+	for (i = 0; i < num_resources; i++) {
+		const struct resource *r = resource + i;
+
+		if (resource_type(r) == IORESOURCE_MEM)
+			if (find_by_address(r->start))
+				return true; /* DT node available */
+	}
+
+	return false; /* Nothing found */
+}
diff --git a/drivers/staging/board/board.h b/drivers/staging/board/board.h
new file mode 100644
index 000000000000..2390ed6c31a4
--- /dev/null
+++ b/drivers/staging/board/board.h
@@ -0,0 +1,20 @@
+#ifndef __BOARD_H__
+#define __BOARD_H__
+#include <linux/init.h>
+#include <linux/of.h>
+
+bool board_staging_dt_node_available(const struct resource *resource,
+				     unsigned int num_resources);
+
+#define board_staging(str, fn)			\
+static int __init runtime_board_check(void)	\
+{						\
+	if (of_machine_is_compatible(str))	\
+		fn();				\
+						\
+	return 0;				\
+}						\
+						\
+late_initcall(runtime_board_check)
+
+#endif /* __BOARD_H__ */
diff --git a/drivers/staging/board/kzm9d.c b/drivers/staging/board/kzm9d.c
new file mode 100644
index 000000000000..533f3026e17a
--- /dev/null
+++ b/drivers/staging/board/kzm9d.c
@@ -0,0 +1,19 @@
+/* Staging board support for KZM9D. Enable not-yet-DT-capable devices here. */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include "board.h"
+
+static const struct resource usbs1_res[] __initconst = {
+	DEFINE_RES_MEM(0xe2800000, 0x2000),
+	DEFINE_RES_IRQ(159),
+};
+
+static void __init kzm9d_init(void)
+{
+	if (!board_staging_dt_node_available(usbs1_res, ARRAY_SIZE(usbs1_res)))
+		platform_device_register_simple("emxx_udc", -1, usbs1_res,
+						ARRAY_SIZE(usbs1_res));
+}
+
+board_staging("renesas,kzm9d", kzm9d_init);