X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fsyscon.h;h=f5e6cc1a4b1da9c284010d00eda9d00c54136eef;hb=a29491ade0adf3dbb9dc51be8b45530edde1f1df;hp=4593b6e3ebfdb96e7869cc9cc88045eaa42cb35d;hpb=9c3193f8d03d4074fa6ca6b783246b97d8dc2ff5;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/syscon.h b/include/syscon.h
index 4593b6e..f5e6cc1 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
  *
@@ -23,12 +25,25 @@ 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_plat {
+	fdt_val_t reg[2];
+};
+#endif
+
 /**
  * syscon_get_regmap() - Get access to a register map
  *
  * @dev:	Device to check (UCLASS_SCON)
  * @info:	Returns regmap for the device
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 struct regmap *syscon_get_regmap(struct udevice *dev);
 
@@ -41,7 +56,7 @@ struct regmap *syscon_get_regmap(struct udevice *dev);
  *
  * @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
+ * 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);
@@ -54,17 +69,37 @@ int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp);
  * are in use. This function looks up the regmap given this driver data.
  *
  * @driver_data:	Driver data value to look up
- * @return register map correponding to @driver_data, or -ve error code
+ * Return: register map correponding to @driver_data, or -ve error code
  */
 struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data);
 
 /**
+ * syscon_regmap_lookup_by_phandle() - Look up a controller by a phandle
+ *
+ * This operates by looking up the given name in the device (device
+ * tree property) of the device using the system controller.
+ *
+ * @dev:	Device using the system controller
+ * @name:	Name of property referring to the system controller
+ * Return:	A pointer to the regmap if found, ERR_PTR(-ve) on error
+ */
+struct regmap *syscon_regmap_lookup_by_phandle(struct udevice *dev,
+					       const char *name);
+
+/**
  * syscon_get_first_range() - get the first memory range from a syscon regmap
  *
  * @driver_data:	Driver data value to look up
- * @return first region of register map correponding to @driver_data, or
+ * Return: first region of register map correponding to @driver_data, or
  *			-ve error code
  */
 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