From 1fe243a1e42fe99da0fa45c8c727f9c3d599c6c9 Mon Sep 17 00:00:00 2001
From: Fabrice Gasnier <fabrice.gasnier@st.com>
Date: Tue, 24 Jul 2018 16:31:28 +0200
Subject: clk: add clk_valid()

Add clk_valid() to check for optional clocks are valid.
Call clk_valid() in test/dm/clk.c and add relevant test routine to
sandbox clk tests.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 include/clk.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include')

diff --git a/include/clk.h b/include/clk.h
index 9a357646ff0..f6d1cc53a1f 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -294,4 +294,14 @@ int clk_disable_bulk(struct clk_bulk *bulk);
 
 int soc_clk_dump(void);
 
+/**
+ * clk_valid() - check if clk is valid
+ *
+ * @clk:	the clock to check
+ * @return true if valid, or false
+ */
+static inline bool clk_valid(struct clk *clk)
+{
+	return !!clk->dev;
+}
 #endif
-- 
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