#ifndef _RESET_H
#define _RESET_H
-#include <linux/errno.h>
+#include <dm/ofnode.h>
+#include <linux/err.h>
/**
* A reset is a hardware signal indicating that a HW module (or IP block, or
* @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.
*
* Should additional information to identify and configure any reset signal
* for any provider be required in the future, the struct could be expanded to
*/
unsigned long id;
unsigned long data;
+ unsigned long polarity;
};
/**
};
#if CONFIG_IS_ENABLED(DM_RESET)
+
+/**
+ * devm_reset_control_get - resource managed reset_get_by_name()
+ * @dev: device to be reset by the controller
+ * @id: reset line name
+ *
+ * Managed reset_get_by_name(). For reset controllers returned
+ * from this function, reset_free() is called automatically on driver
+ * detach.
+ *
+ * Returns a struct reset_ctl or IS_ERR() condition containing errno.
+ */
+struct reset_ctl *devm_reset_control_get(struct udevice *dev, const char *id);
+
+/**
+ * devm_reset_control_get_optional - resource managed reset_get_by_name() that
+ * can fail
+ * @dev: The client device.
+ * @id: reset line name
+ *
+ * Managed reset_get_by_name(). For reset controllers returned
+ * from this function, reset_free() is called automatically on driver
+ * detach.
+ *
+ * Returns a struct reset_ctl or a dummy reset controller if it failed.
+ */
+struct reset_ctl *devm_reset_control_get_optional(struct udevice *dev,
+ const char *id);
+
+/**
+ * devm_reset_control_get - resource managed reset_get_by_index()
+ * @dev: The client device.
+ * @index: The index of the reset signal to request, within the client's
+ * list of reset signals.
+ *
+ * Managed reset_get_by_index(). For reset controllers returned
+ * from this function, reset_free() is called automatically on driver
+ * detach.
+ *
+ * Returns a struct reset_ctl or IS_ERR() condition containing errno.
+ */
+struct reset_ctl *devm_reset_control_get_by_index(struct udevice *dev,
+ int index);
+
+/**
+ * devm_reset_bulk_get - resource managed reset_get_bulk()
+ * @dev: device to be reset by the controller
+ *
+ * Managed reset_get_bulk(). For reset controllers returned
+ * from this function, reset_free() is called automatically on driver
+ * detach.
+ *
+ * Returns a struct reset_ctl or IS_ERR() condition containing errno.
+ */
+struct reset_ctl_bulk *devm_reset_bulk_get(struct udevice *dev);
+
+/**
+ * devm_reset_bulk_get_optional - resource managed reset_get_bulk() that
+ * can fail
+ * @dev: The client device.
+ *
+ * Managed reset_get_bulk(). For reset controllers returned
+ * from this function, reset_free() is called automatically on driver
+ * detach.
+ *
+ * Returns a struct reset_ctl or NULL if it failed.
+ */
+struct reset_ctl_bulk *devm_reset_bulk_get_optional(struct udevice *dev);
+
+/**
+ * devm_reset_bulk_get_by_node - resource managed reset_get_bulk()
+ * @dev: device to be reset by the controller
+ * @node: ofnode where the "resets" property is. Usually a sub-node of
+ * the dev's node.
+ *
+ * see devm_reset_bulk_get()
+ */
+struct reset_ctl_bulk *devm_reset_bulk_get_by_node(struct udevice *dev,
+ ofnode node);
+
+/**
+ * devm_reset_bulk_get_optional_by_node - resource managed reset_get_bulk()
+ * that can fail
+ * @dev: device to be reset by the controller
+ * @node: ofnode where the "resets" property is. Usually a sub-node of
+ * the dev's node.
+ *
+ * see devm_reset_bulk_get_optional()
+ */
+struct reset_ctl_bulk *devm_reset_bulk_get_optional_by_node(struct udevice *dev,
+ ofnode node);
+
/**
* reset_get_by_index - Get/request a reset signal by integer 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.
*
* This looks up and requests all reset signals of the client device; each
{
return reset_release_all(bulk->resets, bulk->count);
}
+
#else
+static inline struct reset_ctl *devm_reset_control_get(struct udevice *dev,
+ const char *id)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct reset_ctl *devm_reset_control_get_optional(struct udevice *dev,
+ const char *id)
+{
+ return NULL;
+}
+
+static inline struct reset_ctl *devm_reset_control_get_by_index(struct udevice *dev,
+ int index)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct reset_ctl_bulk *devm_reset_bulk_get(struct udevice *dev)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct reset_ctl_bulk *devm_reset_bulk_get_optional(struct udevice *dev)
+{
+ return NULL;
+}
+
+static inline struct reset_ctl_bulk *devm_reset_bulk_get_by_node(struct udevice *dev,
+ ofnode node)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
+static inline struct reset_ctl_bulk *devm_reset_bulk_get_optional_by_node(struct udevice *dev,
+ ofnode node)
+{
+ return NULL;
+}
+
static inline int reset_get_by_index(struct udevice *dev, int index,
struct reset_ctl *reset_ctl)
{
projects / platform / kernel / u-boot.git / blobdiff