diff options
Diffstat (limited to 'target/linux/sunxi/patches-4.4/140-reset-add-of_reset_control_get_by_index.patch')
| -rw-r--r-- | target/linux/sunxi/patches-4.4/140-reset-add-of_reset_control_get_by_index.patch | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-4.4/140-reset-add-of_reset_control_get_by_index.patch b/target/linux/sunxi/patches-4.4/140-reset-add-of_reset_control_get_by_index.patch new file mode 100644 index 0000000000..1a48d7c23f --- /dev/null +++ b/target/linux/sunxi/patches-4.4/140-reset-add-of_reset_control_get_by_index.patch @@ -0,0 +1,113 @@ +From b4faa163a7ebae9faab5d0aefe70143e3379178b Mon Sep 17 00:00:00 2001 +From: Vince Hsu <vinceh@nvidia.com> +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 <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> +--- + drivers/reset/core.c | 40 +++++++++++++++++++++++++++++----------- + include/linux/reset.h | 9 +++++++++ + 2 files changed, 38 insertions(+), 11 deletions(-) + +diff --git a/drivers/reset/core.c b/drivers/reset/core.c +index 7955e00..81ae17d 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); + + /** +diff --git a/include/linux/reset.h b/include/linux/reset.h +index 7f65f9c..6db74ad 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) +@@ -106,6 +109,12 @@ static inline struct reset_control *of_reset_control_get( + 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 |