[RFC PATCH v3 2/4] irqchip/gic: common: add support to device tree based quirks

Srinivas Kandagatla
2018-11-12T10:33:38Z

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

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
drivers/irqchip/irq-gic-common.c | 12 ++++++++++++
drivers/irqchip/irq-gic-common.h | 3 +++
2 files changed, 15 insertions(+)

diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c
index 01e673c680cd..3c93c6f4d1f1 100644
--- a/drivers/irqchip/irq-gic-common.c
+++ b/drivers/irqchip/irq-gic-common.c
@@ -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)
{
diff --git a/drivers/irqchip/irq-gic-common.h b/drivers/irqchip/irq-gic-common.h
index 3919cd7c5285..97e58fb6c232 100644
--- a/drivers/irqchip/irq-gic-common.h
+++ b/drivers/irqchip/irq-gic-common.h
@@ -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);

--
2.19.1