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authorVince Hsu <vinceh@nvidia.com>2015-07-13 13:39:39 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2015-11-16 09:23:47 +0100
commitc0a13aa6da5da19f9eedb562b226ec585aabdca9 (patch)
tree1844fe1a0250625d91020fa855fc7af8f16d76b0 /drivers/reset/core.c
parent8005c49d9aea74d382f474ce11afbbc7d7130bec (diff)
downloadlinux-stericsson-c0a13aa6da5da19f9eedb562b226ec585aabdca9.tar.gz
reset: add of_reset_control_get_by_index()
Add of_reset_control_get_by_index() to allow the drivers to get reset device without knowing its name. Signed-off-by: Vince Hsu <vinceh@nvidia.com> [jonathanh@nvidia.com: Updated stub function to return -ENOTSUPP instead of -ENOSYS which should only be used for system calls.] Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset/core.c')
-rw-r--r--drivers/reset/core.c40
1 files changed, 29 insertions, 11 deletions
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 7955e00d04d4..81ae17d15480 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -141,27 +141,24 @@ 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.
+ * of_reset_control_get_by_index - Lookup and obtain a reference to a reset
+ * controller by index.
* @node: device to be reset by the controller
- * @id: reset line name
- *
- * Returns a struct reset_control or IS_ERR() condition containing errno.
+ * @index: index of the reset controller
*
- * Use of id names is optional.
+ * This is to be used to perform a list of resets for a device or power domain
+ * in whatever order. Returns a struct reset_control or IS_ERR() condition
+ * containing errno.
*/
-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)
{
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 +199,27 @@ struct reset_control *of_reset_control_get(struct device_node *node,
return rstc;
}
+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_by_index(node, index);
+}
EXPORT_SYMBOL_GPL(of_reset_control_get);
/**