diff mbox series

[v4,21/24] device property: Modify fwnode irq_get() to use resource

Message ID 20240102140734.v4.21.I38ac58ab04985a404ed6551eb5813fa7841ef410@changeid
State New
Headers
Series Improve IRQ wake capability reporting and update the cros_ec driver to use it |

Commit Message

Mark Hasemeyer Jan. 2, 2024, 9:07 p.m. UTC 
  The underlying ACPI and OF subsystems provide their own APIs which
provide IRQ information as a struct resource. This allows callers to get
more information about the IRQ by looking at the resource flags. For
example, whether or not an IRQ is wake capable.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mark Hasemeyer <markhas@chromium.org>
---

Changes in v4:
-Add Sakari's Reviewed-by tag from v2
-Remove ioport.h dependency in fwnode.h
-Use Andy's @linux.intel.com email

Changes in v3:
-Add Suggested-by tag
-Initialize struct resource to 0 on stack
-EXPORT_SYMBOL()->EXPORT_SYMBOL_GPL()
-Remove extra space in commit message
-Reformat fwnode_irq_get_resource() declaration

Changes in v2:
-New patch

 drivers/acpi/property.c  | 11 +++++------
 drivers/base/property.c  | 32 +++++++++++++++++++++++++-------
 drivers/of/property.c    |  8 ++++----
 include/linux/fwnode.h   |  8 +++++---
 include/linux/property.h |  2 ++
 5 files changed, 41 insertions(+), 20 deletions(-)

Comments

Andy Shevchenko Jan. 6, 2024, 2:52 p.m. UTC | #1 
On Tue, Jan 02, 2024 at 02:07:45PM -0700, Mark Hasemeyer wrote:
> The underlying ACPI and OF subsystems provide their own APIs which
> provide IRQ information as a struct resource. This allows callers to get
> more information about the IRQ by looking at the resource flags. For
> example, whether or not an IRQ is wake capable.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Rob Herring Jan. 9, 2024, 8:47 p.m. UTC | #2 
On Tue, 02 Jan 2024 14:07:45 -0700, Mark Hasemeyer wrote:
> The underlying ACPI and OF subsystems provide their own APIs which
> provide IRQ information as a struct resource. This allows callers to get
> more information about the IRQ by looking at the resource flags. For
> example, whether or not an IRQ is wake capable.
> 
> Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Signed-off-by: Mark Hasemeyer <markhas@chromium.org>
> ---
> 
> Changes in v4:
> -Add Sakari's Reviewed-by tag from v2
> -Remove ioport.h dependency in fwnode.h
> -Use Andy's @linux.intel.com email
> 
> Changes in v3:
> -Add Suggested-by tag
> -Initialize struct resource to 0 on stack
> -EXPORT_SYMBOL()->EXPORT_SYMBOL_GPL()
> -Remove extra space in commit message
> -Reformat fwnode_irq_get_resource() declaration
> 
> Changes in v2:
> -New patch
> 
>  drivers/acpi/property.c  | 11 +++++------
>  drivers/base/property.c  | 32 +++++++++++++++++++++++++-------
>  drivers/of/property.c    |  8 ++++----
>  include/linux/fwnode.h   |  8 +++++---
>  include/linux/property.h |  2 ++
>  5 files changed, 41 insertions(+), 20 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index a6ead5204046b..891fff5a16797 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1627,17 +1627,16 @@  static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return 0;
 }
 
-static int acpi_fwnode_irq_get(const struct fwnode_handle *fwnode,
-			       unsigned int index)
+static int acpi_fwnode_irq_get_resource(const struct fwnode_handle *fwnode, unsigned int index,
+					struct resource *r)
 {
-	struct resource res;
 	int ret;
 
-	ret = acpi_irq_get(ACPI_HANDLE_FWNODE(fwnode), index, &res);
+	ret = acpi_irq_get(ACPI_HANDLE_FWNODE(fwnode), index, r);
 	if (ret)
 		return ret;
 
-	return res.start;
+	return r->start;
 }
 
 #define DECLARE_ACPI_FWNODE_OPS(ops) \
@@ -1664,7 +1663,7 @@  static int acpi_fwnode_irq_get(const struct fwnode_handle *fwnode,
 			acpi_graph_get_remote_endpoint,			\
 		.graph_get_port_parent = acpi_fwnode_get_parent,	\
 		.graph_parse_endpoint = acpi_fwnode_graph_parse_endpoint, \
-		.irq_get = acpi_fwnode_irq_get,				\
+		.irq_get_resource = acpi_fwnode_irq_get_resource,	\
 	};								\
 	EXPORT_SYMBOL_GPL(ops)
 
diff --git a/drivers/base/property.c b/drivers/base/property.c
index a1b01ab420528..441899171d19d 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1046,6 +1046,29 @@  void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index)
 }
 EXPORT_SYMBOL(fwnode_iomap);
 
+/**
+ * fwnode_irq_get_resource - Get IRQ directly from a fwnode and populate
+ *			     the resource struct
+ * @fwnode:	Pointer to the firmware node
+ * @index:	Zero-based index of the IRQ
+ * @r:		Pointer to resource to populate with IRQ information.
+ *
+ * Return: Linux IRQ number on success. Negative errno on failure.
+ */
+int fwnode_irq_get_resource(const struct fwnode_handle *fwnode, unsigned int index,
+			    struct resource *r)
+{
+	int ret;
+
+	ret = fwnode_call_int_op(fwnode, irq_get_resource, index, r);
+	/* We treat mapping errors as invalid case */
+	if (ret == 0)
+		return -EINVAL;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(fwnode_irq_get_resource);
+
 /**
  * fwnode_irq_get - Get IRQ directly from a fwnode
  * @fwnode:	Pointer to the firmware node
@@ -1055,14 +1078,9 @@  EXPORT_SYMBOL(fwnode_iomap);
  */
 int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index)
 {
-	int ret;
+	struct resource r = {};
 
-	ret = fwnode_call_int_op(fwnode, irq_get, index);
-	/* We treat mapping errors as invalid case */
-	if (ret == 0)
-		return -EINVAL;
-
-	return ret;
+	return fwnode_irq_get_resource(fwnode, index, &r);
 }
 EXPORT_SYMBOL(fwnode_irq_get);
 
diff --git a/drivers/of/property.c b/drivers/of/property.c
index afdaefbd03f61..864ea5fa5702b 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -1425,10 +1425,10 @@  static void __iomem *of_fwnode_iomap(struct fwnode_handle *fwnode, int index)
 #endif
 }
 
-static int of_fwnode_irq_get(const struct fwnode_handle *fwnode,
-			     unsigned int index)
+static int of_fwnode_irq_get_resource(const struct fwnode_handle *fwnode,
+				      unsigned int index, struct resource *r)
 {
-	return of_irq_get(to_of_node(fwnode), index);
+	return of_irq_to_resource(to_of_node(fwnode), index, r);
 }
 
 static int of_fwnode_add_links(struct fwnode_handle *fwnode)
@@ -1469,7 +1469,7 @@  const struct fwnode_operations of_fwnode_ops = {
 	.graph_get_port_parent = of_fwnode_graph_get_port_parent,
 	.graph_parse_endpoint = of_fwnode_graph_parse_endpoint,
 	.iomap = of_fwnode_iomap,
-	.irq_get = of_fwnode_irq_get,
+	.irq_get_resource = of_fwnode_irq_get_resource,
 	.add_links = of_fwnode_add_links,
 };
 EXPORT_SYMBOL_GPL(of_fwnode_ops);
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 2a72f55d26eb8..b82c9c072bcc9 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -9,12 +9,13 @@ 
 #ifndef _LINUX_FWNODE_H_
 #define _LINUX_FWNODE_H_
 
-#include <linux/types.h>
-#include <linux/list.h>
 #include <linux/bits.h>
 #include <linux/err.h>
+#include <linux/list.h>
+#include <linux/types.h>
 
 struct fwnode_operations;
+struct resource;
 struct device;
 
 /*
@@ -164,7 +165,8 @@  struct fwnode_operations {
 	int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode,
 				    struct fwnode_endpoint *endpoint);
 	void __iomem *(*iomap)(struct fwnode_handle *fwnode, int index);
-	int (*irq_get)(const struct fwnode_handle *fwnode, unsigned int index);
+	int (*irq_get_resource)(const struct fwnode_handle *fwnode,
+				unsigned int index, struct resource *r);
 	int (*add_links)(struct fwnode_handle *fwnode);
 };
 
diff --git a/include/linux/property.h b/include/linux/property.h
index e6516d0b7d52a..685ba72a8ce9e 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -190,6 +190,8 @@  struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode);
 void fwnode_handle_put(struct fwnode_handle *fwnode);
 
 int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);
+int fwnode_irq_get_resource(const struct fwnode_handle *fwnode,
+			    unsigned int index, struct resource *r);
 int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name);
 
 unsigned int device_get_child_node_count(const struct device *dev);