* [V7,2/7] ACPI / bus: Introduce acpi_get_match_data() function
@ 2017-12-07 21:10 Sinan Kaya
0 siblings, 0 replies; 2+ messages in thread
From: Sinan Kaya @ 2017-12-07 21:10 UTC (permalink / raw)
To: dmaengine, timur, devicetree, linux-acpi, sakari.ailus
Cc: linux-arm-msm, linux-arm-kernel, Sinan Kaya, Rafael J. Wysocki,
Len Brown, open list
OF has of_device_get_match_data() function to extract driver specific data
structure. Add a similar function for ACPI.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
---
drivers/acpi/bus.c | 18 ++++++++++++++++++
include/linux/acpi.h | 6 ++++++
2 files changed, 24 insertions(+)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 4d0979e..f87ed3b 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -785,6 +785,24 @@ const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
}
EXPORT_SYMBOL_GPL(acpi_match_device);
+void *acpi_get_match_data(const struct device *dev)
+{
+ const struct acpi_device_id *match;
+
+ if (!dev->driver)
+ return NULL;
+
+ if (!dev->driver->acpi_match_table)
+ return NULL;
+
+ match = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!match)
+ return NULL;
+
+ return (void *)match->driver_data;
+}
+EXPORT_SYMBOL_GPL(acpi_get_match_data);
+
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids)
{
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 502af53..a927260 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -584,6 +584,7 @@ extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
const struct device *dev);
+void *acpi_get_match_data(const struct device *dev);
extern bool acpi_driver_match_device(struct device *dev,
const struct device_driver *drv);
int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
@@ -755,6 +756,11 @@ static inline const struct acpi_device_id *acpi_match_device(
return NULL;
}
+static inline void *acpi_get_match_data(const struct device *dev)
+{
+ return NULL;
+}
+
static inline bool acpi_driver_match_device(struct device *dev,
const struct device_driver *drv)
{
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [V7,2/7] ACPI / bus: Introduce acpi_get_match_data() function
@ 2017-12-08 14:51 Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2017-12-08 14:51 UTC (permalink / raw)
To: Sinan Kaya
Cc: dmaengine, Timur Tabi, devicetree@vger.kernel.org,
ACPI Devel Maling List, Sakari Ailus, linux-arm-msm,
linux-arm-kernel@lists.infradead.org, Rafael J. Wysocki,
Len Brown, open list
On Thu, Dec 7, 2017 at 10:10 PM, Sinan Kaya <okaya@codeaurora.org> wrote:
> OF has of_device_get_match_data() function to extract driver specific data
> structure. Add a similar function for ACPI.
>
> Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
> ---
> drivers/acpi/bus.c | 18 ++++++++++++++++++
> include/linux/acpi.h | 6 ++++++
> 2 files changed, 24 insertions(+)
>
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 4d0979e..f87ed3b 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -785,6 +785,24 @@ const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
> }
> EXPORT_SYMBOL_GPL(acpi_match_device);
>
> +void *acpi_get_match_data(const struct device *dev)
> +{
> + const struct acpi_device_id *match;
> +
> + if (!dev->driver)
> + return NULL;
> +
> + if (!dev->driver->acpi_match_table)
> + return NULL;
You can safely check dev->driver and this in the same statement (as
long as the first check to be made is on the left).
> +
> + match = acpi_match_device(dev->driver->acpi_match_table, dev);
> + if (!match)
> + return NULL;
> +
> + return (void *)match->driver_data;
> +}
> +EXPORT_SYMBOL_GPL(acpi_get_match_data);
> +
> int acpi_match_device_ids(struct acpi_device *device,
> const struct acpi_device_id *ids)
> {
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 502af53..a927260 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -584,6 +584,7 @@ extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
> const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
> const struct device *dev);
>
> +void *acpi_get_match_data(const struct device *dev);
> extern bool acpi_driver_match_device(struct device *dev,
> const struct device_driver *drv);
> int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
> @@ -755,6 +756,11 @@ static inline const struct acpi_device_id *acpi_match_device(
> return NULL;
> }
>
> +static inline void *acpi_get_match_data(const struct device *dev)
> +{
> + return NULL;
> +}
> +
> static inline bool acpi_driver_match_device(struct device *dev,
> const struct device_driver *drv)
> {
> --
But anyway
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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