* [PATCH v2 1/2] ACPI: utils: Add acpi_reduced_hardware() helper
@ 2021-04-07 17:58 Hans de Goede
2021-04-08 17:52 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Hans de Goede @ 2021-04-07 17:58 UTC (permalink / raw)
To: Rafael J . Wysocki, Len Brown, Zhang Rui
Cc: Hans de Goede, intel-gfx, linux-acpi
Add a getter for the acpi_gbl_reduced_hardware variable so that modules
can check if they are running on an ACPI reduced-hw platform or not.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v2:
- Use EXPORT_SYMBOL_GPL instead of EXPORT_SYMBOL
---
drivers/acpi/utils.c | 11 +++++++++++
include/acpi/acpi_bus.h | 1 +
include/linux/acpi.h | 5 +++++
3 files changed, 17 insertions(+)
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 682edd913b3b..b20774c48c74 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -872,6 +872,17 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
}
EXPORT_SYMBOL(acpi_dev_get_first_match_dev);
+/**
+ * acpi_reduced_hardware - Return if this is an ACPI-reduced-hw machine
+ *
+ * Return true when running on an ACPI-reduced-hw machine, false otherwise.
+ */
+bool acpi_reduced_hardware(void)
+{
+ return acpi_gbl_reduced_hardware;
+}
+EXPORT_SYMBOL_GPL(acpi_reduced_hardware);
+
/*
* acpi_backlight= handling, this is done here rather then in video_detect.c
* because __setup cannot be used in modules.
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index f28b097c658f..d631cb52283e 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -78,6 +78,7 @@ acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
bool acpi_dev_found(const char *hid);
bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
+bool acpi_reduced_hardware(void);
#ifdef CONFIG_ACPI
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 3bdcfc4401b7..e2e6db8313c8 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -748,6 +748,11 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
return NULL;
}
+static inline bool acpi_reduced_hardware(void)
+{
+ return false;
+}
+
static inline void acpi_dev_put(struct acpi_device *adev) {}
static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
--
2.30.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2 1/2] ACPI: utils: Add acpi_reduced_hardware() helper
2021-04-07 17:58 [PATCH v2 1/2] ACPI: utils: Add acpi_reduced_hardware() helper Hans de Goede
@ 2021-04-08 17:52 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2021-04-08 17:52 UTC (permalink / raw)
To: Hans de Goede
Cc: Rafael J . Wysocki, Len Brown, Zhang Rui, intel-gfx,
ACPI Devel Maling List
On Wed, Apr 7, 2021 at 7:58 PM Hans de Goede <hdegoede@redhat.com> wrote:
>
> Add a getter for the acpi_gbl_reduced_hardware variable so that modules
> can check if they are running on an ACPI reduced-hw platform or not.
>
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
> Changes in v2:
> - Use EXPORT_SYMBOL_GPL instead of EXPORT_SYMBOL
> ---
> drivers/acpi/utils.c | 11 +++++++++++
> include/acpi/acpi_bus.h | 1 +
> include/linux/acpi.h | 5 +++++
> 3 files changed, 17 insertions(+)
>
> diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
> index 682edd913b3b..b20774c48c74 100644
> --- a/drivers/acpi/utils.c
> +++ b/drivers/acpi/utils.c
> @@ -872,6 +872,17 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
> }
> EXPORT_SYMBOL(acpi_dev_get_first_match_dev);
>
> +/**
> + * acpi_reduced_hardware - Return if this is an ACPI-reduced-hw machine
> + *
> + * Return true when running on an ACPI-reduced-hw machine, false otherwise.
> + */
> +bool acpi_reduced_hardware(void)
> +{
> + return acpi_gbl_reduced_hardware;
> +}
> +EXPORT_SYMBOL_GPL(acpi_reduced_hardware);
> +
> /*
> * acpi_backlight= handling, this is done here rather then in video_detect.c
> * because __setup cannot be used in modules.
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index f28b097c658f..d631cb52283e 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -78,6 +78,7 @@ acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
>
> bool acpi_dev_found(const char *hid);
> bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
> +bool acpi_reduced_hardware(void);
>
> #ifdef CONFIG_ACPI
>
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 3bdcfc4401b7..e2e6db8313c8 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -748,6 +748,11 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)
> return NULL;
> }
>
> +static inline bool acpi_reduced_hardware(void)
> +{
> + return false;
> +}
> +
> static inline void acpi_dev_put(struct acpi_device *adev) {}
>
> static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
> --
Applied along with the [2/2] as 5.13 material, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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