[PATCH 01/18] irqchip: vf610-gpc: add Vybrid GPC IRQ controller
From: shawnguo@kernel.org (Shawn Guo)
Date: 2016-03-31 08:07:57
Also in:
linux-clk, linux-devicetree, lkml
On Wed, Mar 09, 2016 at 06:16:42PM -0800, Stefan Agner wrote:
+static int __init vf610_gpc_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *domain, *domain_parent;
+ int i;
+
+ domain_parent = irq_find_host(parent);
+ if (!domain_parent) {
+ pr_err("vf610_gpc: interrupt-parent not found\n");
+ return -EINVAL;
+ }
+
+ gpc_base = of_io_request_and_map(node, 0, "gpc");
+ if (WARN_ON(!gpc_base))of_io_request_and_map() doesn't return NULL for error but an error code encoded by ERR_PTR(). That said, you should use IS_ERR(gpc_base) rather than !gpc_base for error check. Shawn
+ return PTR_ERR(gpc_base);
+
+ domain = irq_domain_add_hierarchy(domain_parent, 0, VF610_GPC_MAX_IRQS,
+ node, &gpc_irq_domain_ops, NULL);
+ if (!domain) {
+ iounmap(gpc_base);
+ return -ENOMEM;
+ }
+
+ /* Initially mask all interrupts for wakeup */
+ for (i = 0; i < IMR_NUM; i++)
+ writel_relaxed(~0, gpc_base + VF610_GPC_IMR1 + i * 4);
+
+ return 0;
+}
+IRQCHIP_DECLARE(vf610_gpc, "fsl,vf610-gpc", vf610_gpc_of_init);
--
2.7.2