[PATCH 05/11] of: expose __of_get_dma_parent() to OF subsystem
From: Nicolas Saenz Julienne <hidden>
Date: 2019-09-24 18:13:51
Also in:
dmaengine, dri-devel, linux-arm-kernel, linux-arm-msm, linux-devicetree, linux-media, linux-pci, linux-tegra, lkml, xen-devel
Subsystem:
open firmware and flattened device tree, the rest · Maintainers:
Rob Herring, Saravana Kannan, Linus Torvalds
The function was only available locally to of/address.c, make it available to the OF subsystem. Signed-off-by: Nicolas Saenz Julienne <redacted> --- drivers/of/address.c | 18 ------------------ drivers/of/base.c | 25 +++++++++++++++++++++++++ drivers/of/of_private.h | 2 ++ 3 files changed, 27 insertions(+), 18 deletions(-)
diff --git a/drivers/of/address.c b/drivers/of/address.c
index c9eb4ebcc2e9..53666063e938 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c@@ -681,24 +681,6 @@ u64 of_translate_address(struct device_node *dev, const __be32 *in_addr) } EXPORT_SYMBOL(of_translate_address); -static struct device_node *__of_get_dma_parent(const struct device_node *np) -{ - struct of_phandle_args args; - int ret, index; - - index = of_property_match_string(np, "interconnect-names", "dma-mem"); - if (index < 0) - return of_get_parent(np); - - ret = of_parse_phandle_with_args(np, "interconnects", - "#interconnect-cells", - index, &args); - if (ret < 0) - return of_get_parent(np); - - return of_node_get(args.np); -} - static u64 of_translate_dma_address_parent(struct device_node *parent, const __be32 *in_addr) {
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 94f83051910c..ec161e6b5222 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c@@ -716,6 +716,31 @@ struct device_node *of_get_parent(const struct device_node *node) } EXPORT_SYMBOL(of_get_parent); +/** + * __of_get_dma_parent - Get a node's dma parent if any + * @node: Node to get dma parent + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *__of_get_dma_parent(const struct device_node *np) +{ + struct of_phandle_args args; + int ret, index; + + index = of_property_match_string(np, "interconnect-names", "dma-mem"); + if (index < 0) + return of_get_parent(np); + + ret = of_parse_phandle_with_args(np, "interconnects", + "#interconnect-cells", + index, &args); + if (ret < 0) + return of_get_parent(np); + + return of_node_get(args.np); +} + /** * of_get_next_parent - Iterate to a node's parent * @node: Node to get parent of
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index b528304be244..63bb16cc454c 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h@@ -42,6 +42,8 @@ extern struct kset *of_kset; int __of_n_addr_cells_parent(struct device_node *parent); int __of_n_size_cells_parent(struct device_node *parent); +struct device_node *__of_get_dma_parent(const struct device_node *np); + #if defined(CONFIG_OF_DYNAMIC) extern int of_property_notify(int action, struct device_node *np, struct property *prop, struct property *old_prop);
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2.23.0