openwrt/target/linux/bcm53xx/patches-3.14/121-bcma-get-irqs-from-dt.patch

From eaf1943a2c49cbc6eb0ffafa7b6ced45f2d328da Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Thu, 9 Jan 2014 19:40:14 +0100
Subject: [PATCH 05/17] bcma: get IRQ numbers from dt

It is not possible to auto detect the irq numbers used by the cores on
an arm SoC. If bcma was registered with device tree it will search for
some device tree nodes with the irq number and add it to the core
configuration.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 drivers/bcma/main.c | 42 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -10,6 +10,8 @@
 #include <linux/platform_device.h>
 #include <linux/bcma/bcma.h>
 #include <linux/slab.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
 
 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
 MODULE_LICENSE("GPL");
@@ -120,6 +122,38 @@ static void bcma_release_core_dev(struct
 	kfree(core);
 }
 
+static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
+						     struct bcma_device *core)
+{
+	struct device_node *node;
+	u64 size;
+	const __be32 *reg;
+
+	if (!parent || !parent->dev.of_node)
+		return NULL;
+
+	for_each_child_of_node(parent->dev.of_node, node) {
+		reg = of_get_address(node, 0, &size, NULL);
+		if (!reg)
+			continue;
+		if (be32_to_cpup(reg) == core->addr)
+			return node;
+	}
+	return NULL;
+}
+
+static void bcma_of_fill_device(struct platform_device *parent,
+				struct bcma_device *core)
+{
+	struct device_node *node;
+
+	node = bcma_of_find_child_device(parent, core);
+	if (!node)
+		return;
+	core->dev.of_node = node;
+	core->irq = irq_of_parse_and_map(node, 0);
+}
+
 static int bcma_register_cores(struct bcma_bus *bus)
 {
 	struct bcma_device *core;
@@ -155,7 +189,13 @@ static int bcma_register_cores(struct bc
 			break;
 		case BCMA_HOSTTYPE_SOC:
 			core->dev.dma_mask = &core->dev.coherent_dma_mask;
-			core->dma_dev = &core->dev;
+			if (bus->host_pdev) {
+				core->dma_dev = &bus->host_pdev->dev;
+				core->dev.parent = &bus->host_pdev->dev;
+				bcma_of_fill_device(bus->host_pdev, core);
+			} else {
+				core->dma_dev = &core->dev;
+			}
 			break;
 		case BCMA_HOSTTYPE_SDIO:
 			break;