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Subject[PATCH 5/6] irqchip/irq-bcm7038-l1: Support brcm,int-fwd-mask
Date
On some specific chips like 7211 we need to leave some interrupts
untouched/forwarded to the VPU which is another agent in the system
making use of that interrupt controller hardware (goes to both ARM GIC
and VPU L1 interrupt controller). Make that possible by using the
existing brcm,int-fwd-mask property.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
drivers/irqchip/irq-bcm7038-l1.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c
index 0ad473249f16..5e8f0fbc5f20 100644
--- a/drivers/irqchip/irq-bcm7038-l1.c
+++ b/drivers/irqchip/irq-bcm7038-l1.c
@@ -44,6 +44,7 @@ struct bcm7038_l1_chip {
struct list_head list;
u32 wake_mask[MAX_WORDS];
#endif
+ u32 irq_fwd_mask[MAX_WORDS];
u8 affinity[MAX_WORDS * IRQS_PER_WORD];
};

@@ -265,6 +266,7 @@ static int __init bcm7038_l1_init_one(struct device_node *dn,
resource_size_t sz;
struct bcm7038_l1_cpu *cpu;
unsigned int i, n_words, parent_irq;
+ int ret;

if (of_address_to_resource(dn, idx, &res))
return -EINVAL;
@@ -278,6 +280,14 @@ static int __init bcm7038_l1_init_one(struct device_node *dn,
else if (intc->n_words != n_words)
return -EINVAL;

+ ret = of_property_read_u32_array(dn , "brcm,int-fwd-mask",
+ intc->irq_fwd_mask, n_words);
+ if (ret != 0 && ret != -EINVAL) {
+ /* property exists but has the wrong number of words */
+ pr_err("invalid brcm,int-fwd-mask property\n");
+ return -EINVAL;
+ }
+
cpu = intc->cpus[idx] = kzalloc(sizeof(*cpu) + n_words * sizeof(u32),
GFP_KERNEL);
if (!cpu)
@@ -288,8 +298,9 @@ static int __init bcm7038_l1_init_one(struct device_node *dn,
return -ENOMEM;

for (i = 0; i < n_words; i++) {
- l1_writel(0xffffffff, cpu->map_base + reg_mask_set(intc, i));
- cpu->mask_cache[i] = 0xffffffff;
+ l1_writel(0xffffffff & ~intc->irq_fwd_mask[i],
+ cpu->map_base + reg_mask_set(intc, i));
+ cpu->mask_cache[i] = 0xffffffff & ~intc->irq_fwd_mask[i];
}

parent_irq = irq_of_parse_and_map(dn, idx);
--
2.17.1
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