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authorBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2013-08-30 15:17:29 +0400
committerGrant Likely <grant.likely@linaro.org>2013-09-09 20:04:52 +0400
commit2bc552df76d83cf1455ac8cf4c87615bfd15df74 (patch)
tree07999788612ad5e4435594ae8725bafdb6c39a9f /drivers/of
parentd84ff46a9e19fe27ac6e4d7740ca0429c28e778a (diff)
downloadlinux-2bc552df76d83cf1455ac8cf4c87615bfd15df74.tar.xz
of/platform: add error reporting to of_amba_device_create()
Add error reporting to of_amba_device_create() so the user knows when (and why) some device tree nodes fail to initialize. [ The issue was spotted on Universal C210 board (using revision 0 of ARM Exynos4210 SoC) on which initialization was silently failing for PL330 MDMA1 device tree node (it was using the wrong addres resulting in amba_device_add() returning -ENODEV). ] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/platform.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index b0d1ff8b0991..f6dcde220821 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -264,8 +264,11 @@ static struct amba_device *of_amba_device_create(struct device_node *node,
return NULL;
dev = amba_device_alloc(NULL, 0, 0);
- if (!dev)
+ if (!dev) {
+ pr_err("%s(): amba_device_alloc() failed for %s\n",
+ __func__, node->full_name);
return NULL;
+ }
/* setup generic device info */
dev->dev.coherent_dma_mask = ~0;
@@ -290,12 +293,18 @@ static struct amba_device *of_amba_device_create(struct device_node *node,
dev->irq[i] = irq_of_parse_and_map(node, i);
ret = of_address_to_resource(node, 0, &dev->res);
- if (ret)
+ if (ret) {
+ pr_err("%s(): of_address_to_resource() failed (%d) for %s\n",
+ __func__, ret, node->full_name);
goto err_free;
+ }
ret = amba_device_add(dev, &iomem_resource);
- if (ret)
+ if (ret) {
+ pr_err("%s(): amba_device_add() failed (%d) for %s\n",
+ __func__, ret, node->full_name);
goto err_free;
+ }
return dev;
@@ -374,6 +383,10 @@ static int of_platform_bus_create(struct device_node *bus,
}
if (of_device_is_compatible(bus, "arm,primecell")) {
+ /*
+ * Don't return an error here to keep compatibility with older
+ * device tree files.
+ */
of_amba_device_create(bus, bus_id, platform_data, parent);
return 0;
}