X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fsyscon.h;h=2aa73e520af1a70b02d5f676c65792b2f09bb21f;hb=19ca29f3ff5811e058360aa275208d219b3078c2;hp=c62ccd61b329b66461395cccd4d315e58975a972;hpb=413978d118bb7d7b0a8488d97d802f2899cd81ce;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/syscon.h b/include/syscon.h
index c62ccd6..2aa73e5 100644
--- a/include/syscon.h
+++ b/include/syscon.h
@@ -1,13 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __SYSCON_H
 #define __SYSCON_H
 
+#include <dm/ofnode.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
  *
@@ -37,6 +52,20 @@ struct regmap *syscon_get_regmap(struct udevice *dev);
  *
  * 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
+ *
+ * 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 regmap given this driver data.
  *
  * @driver_data:	Driver data value to look up
@@ -53,4 +82,11 @@ struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data);
  */
 void *syscon_get_first_range(ulong driver_data);
 
+/**
+ * syscon_node_to_regmap - get regmap from syscon
+ *
+ * @node:		Device node of syscon
+ */
+struct regmap *syscon_node_to_regmap(ofnode node);
+
 #endif