Merge git://git.denx.de/u-boot-video

[J-u-boot.git] / include / syscon.h

diff --git a/include/syscon.h b/include/syscon.h
index c62ccd61b329b66461395cccd4d315e58975a972..5d52b1cc3c3d0a7d86bd54cf32383641fe7966f7 100644 (file)
--- a/include/syscon.h
+++ b/include/syscon.h
@@ -8,6 +8,8 @@
 #ifndef __SYSCON_H
 #define __SYSCON_H
 
+#include <fdtdec.h>
+
 /**
  * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS
  *
@@ -23,6 +25,19 @@ struct syscon_ops {
 
 #define syscon_get_ops(dev)        ((struct syscon_ops *)(dev)->driver->ops)
 
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+/*
+ * We don't support 64-bit machines. If they are so resource-contrained that
+ * they need to use OF_PLATDATA, something is horribly wrong with the
+ * education of our hardware engineers.
+ *
+ * Update: 64-bit is now supported and we have an education crisis.
+ */
+struct syscon_base_platdata {
+       fdt_val_t reg[2];
+};
+#endif
+
 /**
  * syscon_get_regmap() - Get access to a register map
  *
@@ -32,6 +47,20 @@ struct syscon_ops {
  */
 struct regmap *syscon_get_regmap(struct udevice *dev);
 
+/**
+ * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
+ *
+ * Each system controller can be accessed by its driver data, which is
+ * assumed to be unique through the scope of all system controllers that
+ * are in use. This function looks up the controller given this driver data.
+ *
+ * @driver_data:       Driver data value to look up
+ * @devp:              Returns the controller correponding to @driver_data
+ * @return 0 on success, -ENODEV if the ID was not found, or other -ve error
+ *        code
+ */
+int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp);
+
 /**
  * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
  *