include: reset: Change to use CONFIG_IS_ENABLED(DM_RESET)

[u-boot] / include / reset.h

diff --git a/include/reset.h b/include/reset.h
index 4f2e35f38fb2c17d14c1f642d415a40519e6bddb..a7bbc1c331bcc486ec80b9fcd6d7a3c4937e9766 100644 (file)
--- a/include/reset.h
+++ b/include/reset.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (c) 2016, NVIDIA CORPORATION.
- *
- * SPDX-License-Identifier: GPL-2.0
  */
 
 #ifndef _RESET_H
@@ -60,7 +59,25 @@ struct reset_ctl {
        unsigned long id;
 };
 
-#ifdef CONFIG_DM_RESET
+/**
+ * struct reset_ctl_bulk - A handle to (allowing control of) a bulk of reset
+ * signals.
+ *
+ * Clients provide storage for the reset control bulk. The content of the
+ * structure is managed solely by the reset API. A reset control bulk struct is
+ * initialized by "get"ing the reset control bulk struct.
+ * The reset control bulk struct is passed to all other bulk reset APIs to apply
+ * the API to all the reset signals in the bulk struct.
+ *
+ * @resets: An array of reset signal handles handles.
+ * @count: The number of reset signal handles in the reset array.
+ */
+struct reset_ctl_bulk {
+       struct reset_ctl *resets;
+       unsigned int count;
+};
+
+#if CONFIG_IS_ENABLED(DM_RESET)
 /**
  * reset_get_by_index - Get/request a reset signal by integer index.
  *
@@ -80,6 +97,22 @@ struct reset_ctl {
 int reset_get_by_index(struct udevice *dev, int index,
                       struct reset_ctl *reset_ctl);
 
+/**
+ * reset_get_bulk - Get/request all reset signals of a device.
+ *
+ * This looks up and requests all reset signals of the client device; each
+ * device is assumed to have n reset signals associated with it somehow,
+ * and this function finds and requests all of them in a separate structure.
+ * The mapping of client device reset signals indices to provider reset signals
+ * may be via device-tree properties, board-provided mapping tables, or some
+ * other mechanism.
+ *
+ * @dev:       The client device.
+ * @bulk       A pointer to a reset control bulk struct to initialize.
+ * @return 0 if OK, or a negative error code.
+ */
+int reset_get_bulk(struct udevice *dev, struct reset_ctl_bulk *bulk);
+
 /**
  * reset_get_by_name - Get/request a reset signal by name.
  *
@@ -131,6 +164,21 @@ int reset_free(struct reset_ctl *reset_ctl);
  */
 int reset_assert(struct reset_ctl *reset_ctl);
 
+/**
+ * reset_assert_bulk - Assert all reset signals in a reset control bulk struct.
+ *
+ * This function will assert the specified reset signals in a reset control
+ * bulk struct, thus resetting the affected HW module(s). Depending on the
+ * reset controller hardware, the reset signals will either stay asserted
+ * until reset_deassert_bulk() is called, or the hardware may autonomously
+ * clear the reset signals itself.
+ *
+ * @bulk:      A reset control bulk struct that was previously successfully
+ *             requested by reset_get_bulk().
+ * @return 0 if OK, or a negative error code.
+ */
+int reset_assert_bulk(struct reset_ctl_bulk *bulk);
+
 /**
  * reset_deassert - Deassert a reset signal.
  *
@@ -144,6 +192,49 @@ int reset_assert(struct reset_ctl *reset_ctl);
  */
 int reset_deassert(struct reset_ctl *reset_ctl);
 
+/**
+ * reset_deassert_bulk - Deassert all reset signals in a reset control bulk
+ * struct.
+ *
+ * This function will deassert the specified reset signals in a reset control
+ * bulk struct, thus releasing the affected HW modules() from reset, and
+ * allowing them to continue normal operation.
+ *
+ * @bulk:      A reset control bulk struct that was previously successfully
+ *             requested by reset_get_bulk().
+ * @return 0 if OK, or a negative error code.
+ */
+int reset_deassert_bulk(struct reset_ctl_bulk *bulk);
+
+/**
+ * reset_release_all - Assert/Free an array of previously requested resets.
+ *
+ * For each reset contained in the reset array, this function will check if
+ * reset has been previously requested and then will assert and free it.
+ *
+ * @reset_ctl: A reset struct array that was previously successfully
+ *             requested by reset_get_by_*().
+ * @count      Number of reset contained in the array
+ * @return 0 if OK, or a negative error code.
+ */
+int reset_release_all(struct reset_ctl *reset_ctl, int count);
+
+/**
+ * reset_release_bulk - Assert/Free an array of previously requested reset
+ * signals in a reset control bulk struct.
+ *
+ * For each reset contained in the reset control bulk struct, this function
+ * will check if reset has been previously requested and then will assert
+ * and free it.
+ *
+ * @bulk:      A reset control bulk struct that was previously successfully
+ *             requested by reset_get_bulk().
+ * @return 0 if OK, or a negative error code.
+ */
+static inline int reset_release_bulk(struct reset_ctl_bulk *bulk)
+{
+       return reset_release_all(bulk->resets, bulk->count);
+}
 #else
 static inline int reset_get_by_index(struct udevice *dev, int index,
                                     struct reset_ctl *reset_ctl)
@@ -151,6 +242,12 @@ static inline int reset_get_by_index(struct udevice *dev, int index,
        return -ENOTSUPP;
 }
 
+static inline int reset_get_bulk(struct udevice *dev,
+                                struct reset_ctl_bulk *bulk)
+{
+       return -ENOTSUPP;
+}
+
 static inline int reset_get_by_name(struct udevice *dev, const char *name,
                                    struct reset_ctl *reset_ctl)
 {
@@ -167,10 +264,30 @@ static inline int reset_assert(struct reset_ctl *reset_ctl)
        return 0;
 }
 
+static inline int reset_assert_bulk(struct reset_ctl_bulk *bulk)
+{
+       return 0;
+}
+
 static inline int reset_deassert(struct reset_ctl *reset_ctl)
 {
        return 0;
 }
+
+static inline int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
+{
+       return 0;
+}
+
+static inline int reset_release_all(struct reset_ctl *reset_ctl, int count)
+{
+       return 0;
+}
+
+static inline int reset_release_bulk(struct reset_ctl_bulk *bulk)
+{
+       return 0;
+}
 #endif
 
 #endif