Add of_register_i2c_devices(), which scans the children of the specified
I2C adapter node, and registers them with the I2C code.
Signed-off-by: Scott Wood <[EMAIL PROTECTED]>
Signed-off-by: G. Liakhovetski <[EMAIL PROTECTED]>
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 3786dcc..9caf96d 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -1067,3 +1067,49 @@ void __iomem *of_iomap(struct device_node *np, int index)
return ioremap(res.start, 1 + res.end - res.start);
}
EXPORT_SYMBOL(of_iomap);
+
+#ifdef CONFIG_I2C
+#include <linux/i2c.h>
+
+void of_register_i2c_devices(struct device_node *adap_node, int bus_num)
+{
+ struct device_node *node = NULL;
+
+ while ((node = of_get_next_child(adap_node, node))) {
+ struct i2c_board_info info;
+ const u32 *addr;
+ const char *name, *model;
+ int len;
+
+ addr = of_get_property(node, "reg", &len);
+ if (!addr || len < sizeof(int) || *addr > 0xffff)
+ continue;
+
+ info.irq = irq_of_parse_and_map(node, 0);
+ if (info.irq == NO_IRQ)
+ info.irq = -1;
+
+ name = of_get_property(node, "compatible", NULL);
+ if (!name)
+ name = node->name;
+ if (!name)
+ continue;
+
+ model = of_get_property(node, "model", NULL);
+ if (!model)
+ model = name;
+
+ /* FIXME: the i2c code should allow drivers to specify
+ * multiple match names; board code shouldn't need to
+ * know what driver will handle a given type.
+ */
+
+ snprintf(info.driver_name, KOBJ_NAME_LEN, name);
+ snprintf(info.type, KOBJ_NAME_LEN, model);
+ info.platform_data = NULL;
+ info.addr = *addr;
+
+ i2c_register_board_info(bus_num, &info, 1);
+ }
+}
+#endif /* CONFIG_I2C */
diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index 6845af9..ed085e1 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -305,6 +305,7 @@ extern int of_irq_map_raw(struct device_node *parent, const
u32 *intspec,
u32 ointsize, const u32 *addr,
struct of_irq *out_irq);
+void of_register_i2c_devices(struct device_node *adap_node, int bus_num);
/**
* of_irq_map_one - Resolve an interrupt for a device
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