[PATCH 02/10] PCI: keystone: Use "dummy_irq_chip" instead of new irqchip for legacy interrupt handling

[Kishon Vijay Abraham I]

Instead of creating a new irqchip with empty callback functions, use
dummy_irq_chip. Since there is nothing to do in the irqchip callback
functions, use handle_simple_irq instead of handle_level_irq.

Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 24 ++---------------------
 1 file changed, 2 insertions(+), 22 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c 
b/drivers/pci/controller/dwc/pci-keystone.c
index 5286a480f76b..1ef443009da5 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -266,31 +266,12 @@ static irqreturn_t ks_pcie_handle_error_irq(struct 
keystone_pcie *ks_pcie)
        return IRQ_HANDLED;
 }
 
-static void ks_pcie_ack_legacy_irq(struct irq_data *d)
-{
-}
-
-static void ks_pcie_mask_legacy_irq(struct irq_data *d)
-{
-}
-
-static void ks_pcie_unmask_legacy_irq(struct irq_data *d)
-{
-}
-
-static struct irq_chip ks_pcie_legacy_irq_chip = {
-       .name = "Keystone-PCI-Legacy-IRQ",
-       .irq_ack = ks_pcie_ack_legacy_irq,
-       .irq_mask = ks_pcie_mask_legacy_irq,
-       .irq_unmask = ks_pcie_unmask_legacy_irq,
-};
-
 static int ks_pcie_init_legacy_irq_map(struct irq_domain *d,
                                       unsigned int irq,
                                       irq_hw_number_t hw_irq)
 {
-       irq_set_chip_and_handler(irq, &ks_pcie_legacy_irq_chip,
-                                handle_level_irq);
+       irq_set_chip_and_handler(irq, &dummy_irq_chip,
+                                handle_simple_irq);
        irq_set_chip_data(irq, d->host_data);
 
        return 0;
@@ -298,7 +279,6 @@ static int ks_pcie_init_legacy_irq_map(struct irq_domain *d,
 
 static const struct irq_domain_ops ks_pcie_legacy_irq_domain_ops = {
        .map = ks_pcie_init_legacy_irq_map,
-       .xlate = irq_domain_xlate_onetwocell,
 };
 
 /**
-- 
2.17.1