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- From b4faa163a7ebae9faab5d0aefe70143e3379178b Mon Sep 17 00:00:00 2001
- From: Vince Hsu <[email protected]>
- Date: Mon, 13 Jul 2015 13:39:39 +0100
- Subject: [PATCH] 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 <[email protected]>
- [[email protected]: Updated stub function to return -ENOTSUPP instead
- of -ENOSYS which should only be used for system calls.]
- Signed-off-by: Jon Hunter <[email protected]>
- Signed-off-by: Philipp Zabel <[email protected]>
- ---
- drivers/reset/core.c | 40 +++++++++++++++++++++++++++++-----------
- include/linux/reset.h | 9 +++++++++
- 2 files changed, 38 insertions(+), 11 deletions(-)
- --- a/drivers/reset/core.c
- +++ b/drivers/reset/core.c
- @@ -141,27 +141,24 @@ int reset_control_status(struct reset_co
- 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_g
-
- 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);
-
- /**
- --- a/include/linux/reset.h
- +++ b/include/linux/reset.h
- @@ -38,6 +38,9 @@ static inline struct reset_control *devm
- 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)
- @@ -106,6 +109,12 @@ static inline struct reset_control *of_r
- return ERR_PTR(-ENOSYS);
- }
-
- +static inline struct reset_control *of_reset_control_get_by_index(
- + struct device_node *node, int index)
- +{
- + return ERR_PTR(-ENOTSUPP);
- +}
- +
- #endif /* CONFIG_RESET_CONTROLLER */
-
- #endif
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