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path: root/drivers/irqchip/irq-gic-v3.c
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Diffstat (limited to 'drivers/irqchip/irq-gic-v3.c')
-rw-r--r--drivers/irqchip/irq-gic-v3.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 8f87f40c9460..d3d4f65b377b 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -41,6 +41,8 @@
#include "irq-gic-common.h"
+#define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0)
+
struct redist_region {
void __iomem *redist_base;
phys_addr_t phys_base;
@@ -55,6 +57,7 @@ struct gic_chip_data {
struct irq_domain *domain;
u64 redist_stride;
u32 nr_redist_regions;
+ u64 flags;
bool has_rss;
unsigned int irq_nr;
struct partition_desc *ppi_descs[16];
@@ -139,6 +142,9 @@ static void gic_enable_redist(bool enable)
u32 count = 1000000; /* 1s! */
u32 val;
+ if (gic_data.flags & FLAGS_WORKAROUND_GICR_WAKER_MSM8996)
+ return;
+
rbase = gic_data_rdist_rd_base();
val = readl_relaxed(rbase + GICR_WAKER);
@@ -1067,6 +1073,15 @@ static const struct irq_domain_ops partition_domain_ops = {
.select = gic_irq_domain_select,
};
+static bool gic_enable_quirk_msm8996(void *data)
+{
+ struct gic_chip_data *d = data;
+
+ d->flags |= FLAGS_WORKAROUND_GICR_WAKER_MSM8996;
+
+ return true;
+}
+
static int __init gic_init_bases(void __iomem *dist_base,
struct redist_region *rdist_regs,
u32 nr_redist_regions,
@@ -1271,6 +1286,16 @@ 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[] = {
+ {
+ .desc = "GICv3: Qualcomm MSM8996 broken firmware",
+ .compatible = "qcom,msm8996-gic-v3",
+ .init = gic_enable_quirk_msm8996,
+ },
+ {
+ }
+};
+
static int __init gic_of_init(struct device_node *node, struct device_node *parent)
{
void __iomem *dist_base;
@@ -1318,6 +1343,8 @@ 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)