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| author |   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2016-11-21 10:01:40 +0000 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2016-11-29 15:57:45 +0000 |
| commit | bdca0c077fc5c2a7bb405281263270070c67f917 (patch) | |
| tree | 0ec8badbf941b0a19eea82bd6945cd852a8457d9 /include/linux/acpi_iort.h | |
| parent | ACPI: Implement acpi_dma_configure (diff) | |
| download | linux-dev-bdca0c077fc5c2a7bb405281263270070c67f917.tar.xz linux-dev-bdca0c077fc5c2a7bb405281263270070c67f917.zip | |
ACPI/IORT: Add node match function
Device drivers (eg ARM SMMU) need to know if a specific component
is part of the IORT table, so that kernel data structures are not
initialized at initcalls time if the respective component is not
part of the IORT table.
To this end, this patch adds a trivial function that allows detecting
if a given IORT node type is present or not in the ACPI table, providing
an ACPI IORT equivalent for of_find_matching_node().
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Tomasz Nowicki <tn@semihalf.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Tomasz Nowicki <tn@semihalf.com>
Acked-by: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Tomasz Nowicki <tn@semihalf.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/acpi_iort.h')
| -rw-r--r-- | include/linux/acpi_iort.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index d16fddaf230e..17bb078073de 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -28,10 +28,12 @@ void iort_deregister_domain_token(int trans_id); struct fwnode_handle *iort_find_domain_token(int trans_id); #ifdef CONFIG_ACPI_IORT void acpi_iort_init(void); +bool iort_node_match(u8 type); u32 iort_msi_map_rid(struct device *dev, u32 req_id); struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id); #else static inline void acpi_iort_init(void) { } +static inline bool iort_node_match(u8 type) { return false; } static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id) { return req_id; } static inline struct irq_domain *iort_get_device_domain(struct device *dev, |