+/* 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
*
#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);
*
* @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);
* 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