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irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI

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In order to add ACPI support we need to isolate ACPI&DT common code and
move DT logic to corresponding functions. To achieve this we are using
firmware agnostic handle which can be unpacked to either DT or ACPI node.

No functional changes other than a very minor one:
1. Terminate its_init call with -ENODEV for non-DT case which allows
to remove hack from its-gic-v3.c.
2. Fix ITS base register address type (from 'unsigned long' to 'phys_addr_t'),
as a bonus we get nice string formatting.
3. Since there is only one of ITS parent domain convert it to static global
variable and drop the parameter from its_probe_one. Users can refer to it
in more convenient way then.

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Tomasz Nowicki
2016-09-12 20:32:24 +02:00
committed by Marc Zyngier
parent d14ae5e6ba
commit db40f0a7ae
3 changed files with 42 additions and 34 deletions
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4
include/linux/irqchip/arm-gic-v3.h
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@@ -430,9 +430,9 @@ struct rdists {
};
struct irq_domain;
struct device_node;
struct fwnode_handle;
int its_cpu_init(void);
int its_init(struct device_node *node, struct rdists *rdists,
int its_init(struct fwnode_handle *handle, struct rdists *rdists,
struct irq_domain *domain);
static inline bool gic_enable_sre(void)