[PATCH V2 02/10] irqchip: xilinx: Add support for parent intc
From: Zubair Lutfullah Kakakhel <hidden>
Date: 2016-08-18 13:43:16
Also in:
netdev
Subsystem:
irqchip drivers, the rest · Maintainers:
Thomas Gleixner, Linus Torvalds
The MIPS based xilfpga platform has the following IRQ structure Peripherals --> xilinx_intcontroller -> mips_cpu_int controller Add support for the driver to chain the irq handler Signed-off-by: Zubair Lutfullah Kakakhel <redacted> --- V1 -> V2 No change --- drivers/irqchip/irq-axi-intc.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-axi-intc.c b/drivers/irqchip/irq-axi-intc.c
index 90bec7d..a0be6fa 100644
--- a/drivers/irqchip/irq-axi-intc.c
+++ b/drivers/irqchip/irq-axi-intc.c@@ -15,6 +15,7 @@ #include <linux/of_address.h> #include <linux/io.h> #include <linux/bug.h> +#include <linux/of_irq.h> static void __iomem *intc_baseaddr;
@@ -135,11 +136,26 @@ static const struct irq_domain_ops xintc_irq_domain_ops = { .map = xintc_map, }; +static void xil_intc_irq_handler(struct irq_desc *desc) +{ + u32 pending = get_irq(); + + if (pending != -1U) { + while (true) { + pending = get_irq(); + generic_handle_irq(pending); + if (pending == -1U) + break; + } + } +} + static int __init xilinx_intc_of_init(struct device_node *intc, struct device_node *parent) { u32 nr_irq, intr_mask; - int ret; + int ret, irq; + struct device_node *parent_node; intc_baseaddr = of_iomap(intc, 0); BUG_ON(!intc_baseaddr);
@@ -188,6 +204,16 @@ static int __init xilinx_intc_of_init(struct device_node *intc, root_domain = irq_domain_add_linear(intc, nr_irq, &xintc_irq_domain_ops, (void *)intr_mask); + parent_node = of_irq_find_parent(intc); + if (parent_node) { + irq = irq_of_parse_and_map(intc, 0); + if (irq) + irq_set_chained_handler_and_data(irq, + xil_intc_irq_handler, + root_domain); + + } + irq_set_default_host(root_domain); return 0;
--
1.9.1