5 files changed, 51 insertions, 34 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b4c2e9c67623..471221bcc4fa 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2071,7 +2071,7 @@ config OLPC
         depends on !X86_PAE
         select GPIOLIB
         select OF
-        select OF_PROMTREE if PROC_DEVICETREE
+        select OF_PROMTREE
         ---help---
           Add support for detecting the unique features of the OLPC
           XO hardware.
diff --git a/arch/x86/include/asm/olpc_ofw.h b/arch/x86/include/asm/olpc_ofw.h
index c5d3a5abbb9f..24487712e0b1 100644
--- a/arch/x86/include/asm/olpc_ofw.h
+++ b/arch/x86/include/asm/olpc_ofw.h
@@ -26,15 +26,12 @@ extern void setup_olpc_ofw_pgd(void);
 /* check if OFW was detected during boot */
 extern bool olpc_ofw_present(void);
 
+extern void olpc_dt_build_devicetree(void);
+
 #else /* !CONFIG_OLPC */
 static inline void olpc_ofw_detect(void) { }
 static inline void setup_olpc_ofw_pgd(void) { }
-#endif /* !CONFIG_OLPC */
-
-#ifdef CONFIG_OF_PROMTREE
-extern void olpc_dt_build_devicetree(void);
-#else
 static inline void olpc_dt_build_devicetree(void) { }
-#endif
+#endif /* !CONFIG_OLPC */
 
 #endif /* _ASM_X86_OLPC_OFW_H */
diff --git a/arch/x86/platform/olpc/Makefile b/arch/x86/platform/olpc/Makefile
index c2a8cab65e5d..81c5e2165c24 100644
--- a/arch/x86/platform/olpc/Makefile
+++ b/arch/x86/platform/olpc/Makefile
@@ -1,4 +1,2 @@
-obj-$(CONFIG_OLPC)              += olpc.o
+obj-$(CONFIG_OLPC)              += olpc.o olpc_ofw.o olpc_dt.o
 obj-$(CONFIG_OLPC_XO1)          += olpc-xo1.o
-obj-$(CONFIG_OLPC)              += olpc_ofw.o
-obj-$(CONFIG_OF_PROMTREE)       += olpc_dt.o
diff --git a/arch/x86/platform/olpc/olpc.c b/arch/x86/platform/olpc/olpc.c
index edaf3fe8dc5e..0060fd59ea00 100644
--- a/arch/x86/platform/olpc/olpc.c
+++ b/arch/x86/platform/olpc/olpc.c
@@ -18,6 +18,7 @@
 #include <linux/io.h>
 #include <linux/string.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
 
 #include <asm/geode.h>
 #include <asm/setup.h>
@@ -187,41 +188,43 @@ err:
 }
 EXPORT_SYMBOL_GPL(olpc_ec_cmd);
 
-static bool __init check_ofw_architecture(void)
+static bool __init check_ofw_architecture(struct device_node *root)
 {
-        size_t propsize;
-        char olpc_arch[5];
-        const void *args[] = { NULL, "architecture", olpc_arch, (void *)5 };
-        void *res[] = { &propsize };
+        const char *olpc_arch;
+        int propsize;
 
-        if (olpc_ofw("getprop", args, res)) {
-                printk(KERN_ERR "ofw: getprop call failed!\n");
-                return false;
-        }
+        olpc_arch = of_get_property(root, "architecture", &propsize);
         return propsize == 5 && strncmp("OLPC", olpc_arch, 5) == 0;
 }
 
-static u32 __init get_board_revision(void)
+static u32 __init get_board_revision(struct device_node *root)
 {
-        size_t propsize;
-        __be32 rev;
-        const void *args[] = { NULL, "board-revision-int", &rev, (void *)4 };
-        void *res[] = { &propsize };
-
-        if (olpc_ofw("getprop", args, res) || propsize != 4) {
-                printk(KERN_ERR "ofw: getprop call failed!\n");
-                return cpu_to_be32(0);
-        }
-        return be32_to_cpu(rev);
+        int propsize;
+        const __be32 *rev;
+
+        rev = of_get_property(root, "board-revision-int", &propsize);
+        if (propsize != 4)
+                return 0;
+
+        return be32_to_cpu(*rev);
 }
 
 static bool __init platform_detect(void)
 {
-        if (!check_ofw_architecture())
+        struct device_node *root = of_find_node_by_path("/");
+        bool success;
+
+        if (!root)
                 return false;
-        olpc_platform_info.flags |= OLPC_F_PRESENT;
-        olpc_platform_info.boardrev = get_board_revision();
-        return true;
+
+        success = check_ofw_architecture(root);
+        if (success) {
+                olpc_platform_info.boardrev = get_board_revision(root);
+                olpc_platform_info.flags |= OLPC_F_PRESENT;
+        }
+
+        of_node_put(root);
+        return success;
 }
 
 static int __init add_xo1_platform_devices(void)
diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
index dab874647530..4ce208f885ef 100644
--- a/arch/x86/platform/olpc/olpc_dt.c
+++ b/arch/x86/platform/olpc/olpc_dt.c
@@ -19,7 +19,9 @@
 #include <linux/kernel.h>
 #include <linux/bootmem.h>
 #include <linux/of.h>
+#include <linux/of_platform.h>
 #include <linux/of_pdt.h>
+#include <asm/olpc.h>
 #include <asm/olpc_ofw.h>
 
 static phandle __init olpc_dt_getsibling(phandle node)
@@ -181,3 +183,20 @@ void __init olpc_dt_build_devicetree(void)
         pr_info("PROM DT: Built device tree with %u bytes of memory.\n",
                         prom_early_allocated);
 }
+
+/* A list of DT node/bus matches that we want to expose as platform devices */
+static struct of_device_id __initdata of_ids[] = {
+        { .compatible = "olpc,xo1-battery" },
+        { .compatible = "olpc,xo1-dcon" },
+        { .compatible = "olpc,xo1-rtc" },
+        {},
+};
+
+static int __init olpc_create_platform_devices(void)
+{
+        if (machine_is_olpc())
+                return of_platform_bus_probe(NULL, of_ids, NULL);
+        else
+                return 0;
+}
+device_initcall(olpc_create_platform_devices);