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Subject[PATCH OF 12/14] x86/rtc: don't register rtc if we the DT blob
Date
or we might end up with two device nodes for the same hardware.

Cc: Andres Salomon <dilinger@queued.net>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
arch/x86/kernel/rtc.c | 3 +++
include/linux/of.h | 12 ++++++++++++
2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index 6f39cab..3f2ad26 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -6,6 +6,7 @@
#include <linux/acpi.h>
#include <linux/bcd.h>
#include <linux/pnp.h>
+#include <linux/of.h>

#include <asm/vsyscall.h>
#include <asm/x86_init.h>
@@ -236,6 +237,8 @@ static __init int add_rtc_cmos(void)
}
}
#endif
+ if (of_have_populated_dt())
+ return 0;

platform_device_register(&rtc_device);
dev_info(&rtc_device.dev,
diff --git a/include/linux/of.h b/include/linux/of.h
index cad7cf0..016968d 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -70,6 +70,11 @@ extern struct device_node *allnodes;
extern struct device_node *of_chosen;
extern rwlock_t devtree_lock;

+static inline int of_have_populated_dt(void)
+{
+ return allnodes != NULL;
+}
+
static inline bool of_node_is_root(const struct device_node *node)
{
return node && (node->parent == NULL);
@@ -222,5 +227,12 @@ extern void of_attach_node(struct device_node *);
extern void of_detach_node(struct device_node *);
#endif

+#else
+
+static inline int of_have_populated_dt(void)
+{
+ return 0;
+}
+
#endif /* CONFIG_OF */
#endif /* _LINUX_OF_H */
--
1.7.3.2


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