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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2011-02-22 21:07:46 +0100
committerThomas Gleixner <tglx@linutronix.de>2011-02-23 22:27:55 +0100
commit3bcbaf6e08d8d82cde781997bd2c56dda87049b5 (patch)
tree20e53770f1aabf3023867ba1d2fe6ec3ecc54b3c /include/linux/of.h
parent1fa4163bdc199a0b80f9e333d718b3f65e901593 (diff)
downloadop-kernel-dev-3bcbaf6e08d8d82cde781997bd2c56dda87049b5.zip
op-kernel-dev-3bcbaf6e08d8d82cde781997bd2c56dda87049b5.tar.gz
rtc: cmos: Add OF bindings
This allows to load the OF driver based informations from the device tree. Systems without BIOS may need to perform some initialization. PowerPC creates a PNP device from the OF information and performs this kind of initialization in their private PCI quirk. This looks more generic. This patch also avoids registering the platform RTC driver on X86 if we have a device tree blob. Otherwise we would setup the device based on the hardcoded information in arch/x86 rather than the device tree based one. [ tglx: Changed "int of_have_populated_dt()" to bool as recommended by Grant ] Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org Cc: rtc-linux@googlegroups.com Cc: Alessandro Zummo <a.zummo@towertech.it> LKML-Reference: <1298405266-1624-12-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/of.h')
-rw-r--r--include/linux/of.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h
index d9dd664..266db1d0 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 bool 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 bool of_have_populated_dt(void)
+{
+ return false;
+}
+
#endif /* CONFIG_OF */
#endif /* _LINUX_OF_H */
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