From acbb7cd4d34caec36ff6d044a8f55325fa27459f Mon Sep 17 00:00:00 2001
From: Sekhar Nori <nsekhar@ti.com>
Date: Thu, 1 Aug 2019 19:12:55 +0530
Subject: [PATCH] clk: add support for clk_is_match()
Add support for clk_is_match() which is required to
know if two clock pointers point to the same exact
physical clock.
Also add a unit test for the new API.
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---
drivers/clk/clk-uclass.c | 13 +++++++++++++
include/clk.h | 12 ++++++++++++
test/dm/clk.c | 1 +
3 files changed, 26 insertions(+)
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index cee4d912b0..c66b6f3c4e 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -518,6 +518,19 @@ int clk_get_by_id(ulong id, struct clk **clkp)
return -ENOENT;
}
+bool clk_is_match(const struct clk *p, const struct clk *q)
+{
+ /* trivial case: identical struct clk's or both NULL */
+ if (p == q)
+ return true;
+
+ /* same device, id and data */
+ if (p->dev == q->dev && p->id == q->id && p->data == q->data)
+ return true;
+
+ return false;
+}
+
UCLASS_DRIVER(clk) = {
.id = UCLASS_CLK,
.name = "clk",
diff --git a/include/clk.h b/include/clk.h
index 2ebc905e04..3ca2796b57 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -333,6 +333,18 @@ int clk_disable(struct clk *clk);
*/
int clk_disable_bulk(struct clk_bulk *bulk);
+/**
+ * clk_is_match - check if two clk's point to the same hardware clock
+ * @p: clk compared against q
+ * @q: clk compared against p
+ *
+ * Returns true if the two struct clk pointers both point to the same hardware
+ * clock node.
+ *
+ * Returns false otherwise. Note that two NULL clks are treated as matching.
+ */
+bool clk_is_match(const struct clk *p, const struct clk *q);
+
int soc_clk_dump(void);
/**
diff --git a/test/dm/clk.c b/test/dm/clk.c
index f301ecbb45..676ef217f0 100644
--- a/test/dm/clk.c
+++ b/test/dm/clk.c
@@ -24,6 +24,7 @@ static int dm_test_clk_base(struct unit_test_state *uts)
/* Get the same clk port in 2 different ways and compare */
ut_assertok(clk_get_by_index(dev, 1, &clk_method1));
ut_assertok(clk_get_by_index_nodev(dev_ofnode(dev), 1, &clk_method2));
+ ut_asserteq(clk_is_match(&clk_method1, &clk_method2), true);
ut_asserteq(clk_method1.id, clk_method2.id);
return 0;
--
2.39.5