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irqchip/gic: Add support to device tree based quirks 

This patch adds support to device tree based quirks based on
device tree compatible string.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Srinivas Kandagatla 2018-12-10 13:56:31 +00:00 committed by Marc Zyngier
parent 7c813152cf
commit f70fdb42a0
3 changed files with 22 additions and 0 deletions
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12
drivers/irqchip/irq-gic-common.c
View File

@ -36,6 +36,18 @@ void gic_set_kvm_info(const struct gic_kvm_info *info)
gic_kvm_info = info;
}
void gic_enable_of_quirks(const struct device_node *np,
const struct gic_quirk *quirks, void *data)
{
for (; quirks->desc; quirks++) {
if (!of_device_is_compatible(np, quirks->compatible))
continue;
if (quirks->init(data))
pr_info("GIC: enabling workaround for %s\n",
quirks->desc);
}
}
void gic_enable_quirks(u32 iidr, const struct gic_quirk *quirks,
void *data)
{

3
drivers/irqchip/irq-gic-common.h
View File

@ -23,6 +23,7 @@
struct gic_quirk {
const char *desc;
const char *compatible;
bool (*init)(void *data);
u32 iidr;
u32 mask;
@ -35,6 +36,8 @@ void gic_dist_config(void __iomem *base, int gic_irqs,
void gic_cpu_config(void __iomem *base, void (*sync_access)(void));
void gic_enable_quirks(u32 iidr, const struct gic_quirk *quirks,
void *data);
void gic_enable_of_quirks(const struct device_node *np,
const struct gic_quirk *quirks, void *data);
void gic_set_kvm_info(const struct gic_kvm_info *info);

7
drivers/irqchip/irq-gic-v3.c
View File

@ -1271,6 +1271,11 @@ static void __init gic_of_setup_kvm_info(struct device_node *node)
gic_set_kvm_info(&gic_v3_kvm_info);
}
static const struct gic_quirk gic_quirks[] = {
{
}
};
static int __init gic_of_init(struct device_node *node, struct device_node *parent)
{
void __iomem *dist_base;
@ -1318,6 +1323,8 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare
if (of_property_read_u64(node, "redistributor-stride", &redist_stride))
redist_stride = 0;
gic_enable_of_quirks(node, gic_quirks, &gic_data);
err = gic_init_bases(dist_base, rdist_regs, nr_redist_regions,
redist_stride, &node->fwnode);
if (err)