From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Implement a function that must be called from machine code early in
the bo process in order to probe all registered early devices.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
drivers/of/platform.c | 12 ++++++++++++
include/linux/of_platform.h | 2 ++
2 files changed, 14 insertions(+)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 4b55e568fe77..525a466b03d1 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -541,6 +541,18 @@ int of_early_platform_populate(struct device_node *root,
return rc;
}
EXPORT_SYMBOL_GPL(of_early_platform_populate);
+
+/**
+ * of_early_platform_probe() - Probe all registered early platform devices.
+ *
+ * Returns 0 on success, a negative error code on failure.
+ */
+int of_early_platform_probe(void)
+{
+ return early_platform_driver_register_probe_all(
+ EARLY_PLATFORM_DEFAULT_CLASS, INT_MAX, 0);
+}
+EXPORT_SYMBOL_GPL(of_early_platform_probe);
#endif /* CONFIG_EARLY_PLATFORM_DEVICES */
int of_platform_default_populate(struct device_node *root,
diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index 2bf1013a3e89..caa08e3bf3b7 100644
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -81,6 +81,7 @@ extern int of_early_platform_populate(struct device_node *root,
const struct of_device_id *matches,
const struct of_dev_auxdata *lookup,
struct device *parent);
+extern int of_early_platform_probe(void);
#else /* CONFIG_EARLY_PLATFORM_DEVICES */
static inline int
of_early_platform_populate(struct device_node *root,
@@ -90,6 +91,7 @@ of_early_platform_populate(struct device_node *root,
{
return -ENOSYS;
}
+static inline void int of_early_platform_probe(void) {}
#endif /* CONFIG_EARLY_PLATFORM_DEVICES */
extern int of_platform_default_populate(struct device_node *root,
--
2.17.0
--
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