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Message-ID: <ZYQVdE4esAZbtMrn@kekkonen.localdomain>
Date: Thu, 21 Dec 2023 10:37:40 +0000
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: Mark Hasemeyer <markhas@...omium.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Tzung-Bi Shih <tzungbi@...nel.org>,
Raul Rangel <rrangel@...omium.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Andy Shevchenko <andriy.shevchenko@...el.com>,
Rob Herring <robh@...nel.org>, Sudeep Holla <sudeep.holla@....com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Daniel Scally <djrscally@...il.com>,
Frank Rowand <frowand.list@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Len Brown <lenb@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2 20/22] device property: Modify fwnode irq_get() to use
resource
Hi Mark,
Thank you for the patch.
On Wed, Dec 20, 2023 at 04:54:34PM -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.
>
> Signed-off-by: Mark Hasemeyer <markhas@...omium.org>
> ---
>
> Changes in v2:
> -New patch
>
> drivers/acpi/property.c | 11 +++++------
> drivers/base/property.c | 24 +++++++++++++++++++++---
> drivers/of/property.c | 8 ++++----
> include/linux/fwnode.h | 8 +++++---
> include/linux/property.h | 2 ++
> 5 files changed, 37 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
> index a6ead5204046b..259869987ffff 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..4f5d5ab5ab8cf 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -1047,23 +1047,41 @@ void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index)
> EXPORT_SYMBOL(fwnode_iomap);
>
> /**
> - * fwnode_irq_get - Get IRQ directly from a fwnode
> + * 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(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 ret;
>
> - ret = fwnode_call_int_op(fwnode, irq_get, index);
> + 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(fwnode_irq_get_resource);
Both acpi_irq_get() and of_irq_to_resourece() use EXPORT_SYMBOL_GPL()
instead. I don't see why fwnode_irq_get_resource() shouldn't do the same.
With this changed,
Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
In fact this should have always been the case for fwnode_irq_get(). I
wouldn't mind changing that, too, in a separate patch.
> +
> +/**
> + * fwnode_irq_get - Get IRQ directly from a fwnode
> + * @fwnode: Pointer to the firmware node
> + * @index: Zero-based index of the IRQ
> + *
> + * Return: Linux IRQ number on success. Negative errno on failure.
> + */
> +int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index)
> +{
> + struct resource r;
> +
> + 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..716ed863acde0 100644
> --- a/include/linux/fwnode.h
> +++ b/include/linux/fwnode.h
> @@ -9,10 +9,11 @@
> #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/ioport.h>
> +#include <linux/list.h>
> +#include <linux/types.h>
>
> struct fwnode_operations;
> 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);
--
Kind regards,
Sakari Ailus
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