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path: root/drivers/of/of_i2c.c
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Diffstat (limited to 'drivers/of/of_i2c.c')
-rw-r--r--drivers/of/of_i2c.c50
1 files changed, 29 insertions, 21 deletions
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index ab6522c8e4fe..0a694debd226 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -14,57 +14,65 @@
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/of_i2c.h>
+#include <linux/of_irq.h>
#include <linux/module.h>
-void of_register_i2c_devices(struct i2c_adapter *adap,
- struct device_node *adap_node)
+void of_i2c_register_devices(struct i2c_adapter *adap)
{
void *result;
struct device_node *node;
- for_each_child_of_node(adap_node, node) {
+ /* Only register child devices if the adapter has a node pointer set */
+ if (!adap->dev.of_node)
+ return;
+
+ dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
+
+ for_each_child_of_node(adap->dev.of_node, node) {
struct i2c_board_info info = {};
struct dev_archdata dev_ad = {};
const __be32 *addr;
int len;
- if (of_modalias_node(node, info.type, sizeof(info.type)) < 0)
+ dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name);
+
+ if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) {
+ dev_err(&adap->dev, "of_i2c: modalias failure on %s\n",
+ node->full_name);
continue;
+ }
addr = of_get_property(node, "reg", &len);
- if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) {
- printk(KERN_ERR
- "of-i2c: invalid i2c device entry\n");
+ if (!addr || (len < sizeof(int))) {
+ dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
+ node->full_name);
continue;
}
- info.irq = irq_of_parse_and_map(node, 0);
-
info.addr = be32_to_cpup(addr);
+ if (info.addr > (1 << 10) - 1) {
+ dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
+ info.addr, node->full_name);
+ continue;
+ }
- info.of_node = node;
+ info.irq = irq_of_parse_and_map(node, 0);
+ info.of_node = of_node_get(node);
info.archdata = &dev_ad;
request_module("%s", info.type);
result = i2c_new_device(adap, &info);
if (result == NULL) {
- printk(KERN_ERR
- "of-i2c: Failed to load driver for %s\n",
- info.type);
+ dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
+ node->full_name);
+ of_node_put(node);
irq_dispose_mapping(info.irq);
continue;
}
-
- /*
- * Get the node to not lose the dev_archdata->of_node.
- * Currently there is no way to put it back, as well as no
- * of_unregister_i2c_devices() call.
- */
- of_node_get(node);
}
}
-EXPORT_SYMBOL(of_register_i2c_devices);
+EXPORT_SYMBOL(of_i2c_register_devices);
static int of_dev_node_match(struct device *dev, void *data)
{