Add of_reset_control_get_by_index() to allow the dirvers to get reset device
without knowing its name.
Signed-off-by: Vince Hsu <vinceh@xxxxxxxxxx>
---
drivers/reset/core.c | 47 ++++++++++++++++++++++++++++++++---------------
include/linux/reset.h | 9 +++++++++
2 files changed, 41 insertions(+), 15 deletions(-)
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 7955e00d04d4..25a0da1654f8 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -140,28 +140,15 @@ int reset_control_status(struct reset_control *rstc)
}
EXPORT_SYMBOL_GPL(reset_control_status);
-/**
- * of_reset_control_get - Lookup and obtain a reference to a reset controller.
- * @node: device to be reset by the controller
- * @id: reset line name
- *
- * Returns a struct reset_control or IS_ERR() condition containing errno.
- *
- * Use of id names is optional.
- */
-struct reset_control *of_reset_control_get(struct device_node *node,
- const char *id)
+struct reset_control *__of_reset_control_get(struct device_node *node,
+ int index)
{
struct reset_control *rstc = ERR_PTR(-EPROBE_DEFER);
struct reset_controller_dev *r, *rcdev;
struct of_phandle_args args;
- int index = 0;
int rstc_id;
int ret;
- if (id)
- index = of_property_match_string(node,
- "reset-names", id);
ret = of_parse_phandle_with_args(node, "resets", "#reset-cells",
index, &args);
if (ret)
@@ -202,6 +189,36 @@ struct reset_control *of_reset_control_get(struct device_node *node,
return rstc;
}
+
+struct reset_control *of_reset_control_get_by_index(struct device_node *node,
+ int index)
+{
+ if (!node)
+ return ERR_PTR(-EINVAL);
+
+ return __of_reset_control_get(node, index);
+}
+EXPORT_SYMBOL_GPL(of_reset_control_get_by_index);
+
+/**
+ * of_reset_control_get - Lookup and obtain a reference to a reset controller.
+ * @node: device to be reset by the controller
+ * @id: reset line name
+ *
+ * Returns a struct reset_control or IS_ERR() condition containing errno.
+ *
+ * Use of id names is optional.
+ */
+struct reset_control *of_reset_control_get(struct device_node *node,
+ const char *id)
+{
+ int index = 0;
+
+ if (id)
+ index = of_property_match_string(node,
+ "reset-names", id);
+ return __of_reset_control_get(node, index);
+}
EXPORT_SYMBOL_GPL(of_reset_control_get);
/**
diff --git a/include/linux/reset.h b/include/linux/reset.h
index da5602bd77d7..f29fc88c4868 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -38,6 +38,9 @@ static inline struct reset_control *devm_reset_control_get_optional(
struct reset_control *of_reset_control_get(struct device_node *node,
const char *id);
+struct reset_control *of_reset_control_get_by_index(
+ struct device_node *node, int index);
+
#else
static inline int reset_control_reset(struct reset_control *rstc)
@@ -92,6 +95,12 @@ static inline struct reset_control *of_reset_control_get(
return ERR_PTR(-ENOSYS);
}
+struct reset_control *of_reset_control_get_by_index(
+ struct device_node *node, int index)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
#endif /* CONFIG_RESET_CONTROLLER */
#endif
--
1.9.1
--
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