efi_loader: type of efi_secure_mode

[oweals/u-boot.git] / include / reset.h

diff --git a/include/reset.h b/include/reset.h
index ae247ceb4fb5ecbe14a34282341d01dec7963d03..4fac4e6a202a1d19d128d5987082cc31dd01ff4b 100644 (file)
--- a/include/reset.h
+++ b/include/reset.h
@@ -1,12 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (c) 2016, NVIDIA CORPORATION.
- *
- * SPDX-License-Identifier: GPL-2.0
  */
 
 #ifndef _RESET_H
 #define _RESET_H
 
+#include <dm/ofnode.h>
 #include <linux/errno.h>
 
 /**
@@ -41,10 +41,14 @@ struct udevice;
  *
  * @dev: The device which implements the reset signal.
  * @id: The reset signal ID within the provider.
+ * @data: An optional data field for scenarios where a single integer ID is not
+ *       sufficient. If used, it can be populated through an .of_xlate op and
+ *       processed during the various reset ops.
+ * @polarity: An optional polarity field for drivers that support
+ *       different reset polarities.
  *
- * Currently, the reset API assumes that a single integer ID is enough to
- * identify and configure any reset signal for any reset provider. If this
- * assumption becomes invalid in the future, the struct could be expanded to
+ * Should additional information to identify and configure any reset signal
+ * for any provider be required in the future, the struct could be expanded to
  * either (a) add more fields to allow reset providers to store additional
  * information, or (b) replace the id field with an opaque pointer, which the
  * provider would dynamically allocated during its .of_xlate op, and process
@@ -54,10 +58,11 @@ struct udevice;
 struct reset_ctl {
        struct udevice *dev;
        /*
-        * Written by of_xlate. We assume a single id is enough for now. In the
-        * future, we might add more fields here.
+        * Written by of_xlate. In the future, we might add more fields here.
         */
        unsigned long id;
+       unsigned long data;
+       unsigned long polarity;
 };
 
 /**
@@ -78,7 +83,7 @@ struct reset_ctl_bulk {
        unsigned int count;
 };
 
-#ifdef CONFIG_DM_RESET
+#if CONFIG_IS_ENABLED(DM_RESET)
 /**
  * reset_get_by_index - Get/request a reset signal by integer index.
  *
@@ -98,6 +103,21 @@ struct reset_ctl_bulk {
 int reset_get_by_index(struct udevice *dev, int index,
                       struct reset_ctl *reset_ctl);
 
+/**
+ * reset_get_by_index_nodev - Get/request a reset signal by integer index
+ * without a device.
+ *
+ * This is a version of reset_get_by_index() that does not use a device.
+ *
+ * @node:      The client ofnode.
+ * @index:     The index of the reset signal to request, within the client's
+ *             list of reset signals.
+ * @reset_ctl  A pointer to a reset control struct to initialize.
+ * @return 0 if OK, or a negative error code.
+ */
+int reset_get_by_index_nodev(ofnode node, int index,
+                            struct reset_ctl *reset_ctl);
+
 /**
  * reset_get_bulk - Get/request all reset signals of a device.
  *
@@ -207,6 +227,15 @@ int reset_deassert(struct reset_ctl *reset_ctl);
  */
 int reset_deassert_bulk(struct reset_ctl_bulk *bulk);
 
+/**
+ * rst_status - Check reset signal status.
+ *
+ * @reset_ctl: The reset signal to check.
+ * @return 0 if deasserted, positive if asserted, or a negative
+ *           error code.
+ */
+int reset_status(struct reset_ctl *reset_ctl);
+
 /**
  * reset_release_all - Assert/Free an array of previously requested resets.
  *
@@ -280,6 +309,11 @@ static inline int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
        return 0;
 }
 
+static inline int reset_status(struct reset_ctl *reset_ctl)
+{
+       return -ENOTSUPP;
+}
+
 static inline int reset_release_all(struct reset_ctl *reset_ctl, int count)
 {
        return 0;
@@ -291,4 +325,15 @@ static inline int reset_release_bulk(struct reset_ctl_bulk *bulk)
 }
 #endif
 
+/**
+ * reset_valid() - check if reset is valid
+ *
+ * @reset_ctl:         the reset to check
+ * @return TRUE if valid, or FALSE
+ */
+static inline bool reset_valid(struct reset_ctl *reset_ctl)
+{
+       return !!reset_ctl->dev;
+}
+
 #endif