+ struct device_node *i2c_np;
+ const char *i2c_compat = "samsung,s3c2440-i2c";
+ unsigned int tmp;
+
+ /*
+ * Exynos5's legacy i2c controller and new high speed i2c
+ * controller have muxed interrupt sources. By default the
+ * interrupts for 4-channel HS-I2C controller are enabled.
+ * If node for first four channels of legacy i2c controller
+ * are available then re-configure the interrupts via the
+ * system register.
+ */
+ for_each_compatible_node(i2c_np, NULL, i2c_compat) {
+ if (of_device_is_available(i2c_np)) {
+ if (of_alias_get_id(i2c_np, "i2c") < 4) {
+ tmp = readl(EXYNOS5_SYS_I2C_CFG);
+ writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")),
+ EXYNOS5_SYS_I2C_CFG);
+ }
+ }
+ }
+