From e7c865620e569df493e67d3772673108fce62064 Mon Sep 17 00:00:00 2001
From: Jean-Jacques Hiblot <jjhiblot@ti.com>
Date: Thu, 9 Aug 2018 16:17:42 +0200
Subject: [PATCH] uclass: Add dev_get_uclass_index() to get the uclass/index of
a device
This function is the reciprocal of uclass_find_device().
It will be used to print the index information in dm tree dump.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
---
drivers/core/uclass.c | 21 +++++++++++++++++++++
include/dm/uclass-internal.h | 11 +++++++++++
2 files changed, 32 insertions(+)
diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index d609b170e1..3113d6a56b 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -171,6 +171,27 @@ enum uclass_id uclass_get_by_name(const char *name)
return UCLASS_INVALID;
}
+int dev_get_uclass_index(struct udevice *dev, struct uclass **ucp)
+{
+ struct udevice *iter;
+ struct uclass *uc = dev->uclass;
+ int i = 0;
+
+ if (list_empty(&uc->dev_head))
+ return -ENODEV;
+
+ list_for_each_entry(iter, &uc->dev_head, uclass_node) {
+ if (iter == dev) {
+ if (ucp)
+ *ucp = uc;
+ return i;
+ }
+ i++;
+ }
+
+ return -ENODEV;
+}
+
int uclass_find_device(enum uclass_id id, int index, struct udevice **devp)
{
struct uclass *uc;
diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h
index 7ba064bd53..30d5a4fb9b 100644
--- a/include/dm/uclass-internal.h
+++ b/include/dm/uclass-internal.h
@@ -23,6 +23,17 @@
*/
int uclass_get_device_tail(struct udevice *dev, int ret, struct udevice **devp);
+/**
+ * dev_get_uclass_index() - Get uclass and index of device
+ * @dev: - in - Device that we want the uclass/index of
+ * @ucp: - out - A pointer to the uclass the device belongs to
+ *
+ * The device is not prepared for use - this is an internal function.
+ *
+ * @return the index of the device in the uclass list or -ENODEV if not found.
+ */
+int dev_get_uclass_index(struct udevice *dev, struct uclass **ucp);
+
/**
* uclass_find_device() - Return n-th child of uclass
* @id: Id number of the uclass
--
2.39.5