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81 lines
2.2 KiB
Diff
81 lines
2.2 KiB
Diff
From eaf1943a2c49cbc6eb0ffafa7b6ced45f2d328da Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Thu, 9 Jan 2014 19:40:14 +0100
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Subject: [PATCH 05/17] bcma: get IRQ numbers from dt
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It is not possible to auto detect the irq numbers used by the cores on
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an arm SoC. If bcma was registered with device tree it will search for
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some device tree nodes with the irq number and add it to the core
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configuration.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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drivers/bcma/main.c | 42 +++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 41 insertions(+), 1 deletion(-)
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--- a/drivers/bcma/main.c
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+++ b/drivers/bcma/main.c
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@@ -10,6 +10,8 @@
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#include <linux/platform_device.h>
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#include <linux/bcma/bcma.h>
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#include <linux/slab.h>
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+#include <linux/of_irq.h>
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+#include <linux/of_address.h>
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MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
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MODULE_LICENSE("GPL");
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@@ -131,6 +133,38 @@ static bool bcma_is_core_needed_early(u1
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return false;
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}
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+static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
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+ struct bcma_device *core)
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+{
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+ struct device_node *node;
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+ u64 size;
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+ const __be32 *reg;
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+
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+ if (!parent || !parent->dev.of_node)
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+ return NULL;
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+
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+ for_each_child_of_node(parent->dev.of_node, node) {
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+ reg = of_get_address(node, 0, &size, NULL);
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+ if (!reg)
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+ continue;
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+ if (be32_to_cpup(reg) == core->addr)
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+ return node;
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+ }
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+ return NULL;
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+}
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+
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+static void bcma_of_fill_device(struct platform_device *parent,
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+ struct bcma_device *core)
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+{
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+ struct device_node *node;
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+
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+ node = bcma_of_find_child_device(parent, core);
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+ if (!node)
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+ return;
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+ core->dev.of_node = node;
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+ core->irq = irq_of_parse_and_map(node, 0);
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+}
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+
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static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
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{
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int err;
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@@ -147,7 +181,13 @@ static void bcma_register_core(struct bc
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break;
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case BCMA_HOSTTYPE_SOC:
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core->dev.dma_mask = &core->dev.coherent_dma_mask;
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- core->dma_dev = &core->dev;
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+ if (bus->host_pdev) {
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+ core->dma_dev = &bus->host_pdev->dev;
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+ core->dev.parent = &bus->host_pdev->dev;
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+ bcma_of_fill_device(bus->host_pdev, core);
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+ } else {
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+ core->dma_dev = &core->dev;
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+ }
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break;
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case BCMA_HOSTTYPE_SDIO:
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break;
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