linux-kernel - [PATCH v6 4/6] MIPS: AR7: Add clk_get

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Date:   Fri, 16 Nov 2018 14:59:35 +0000
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     Ralf Baechle <ralf@...ux-mips.org>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-mips@...ux-mips.org
Subject: [PATCH v6 4/6] MIPS: AR7: Add clk_get_optional() function

clk_get_optional() returns NULL if not found instead of -ENOENT,
otherwise the behaviour is the same as clk_get().

Signed-off-by: Phil Edworthy <phil.edworthy@...esas.com>
---
 arch/mips/ar7/clock.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/mips/ar7/clock.c b/arch/mips/ar7/clock.c
index 6b64fd96dba8..b13f763948b1 100644
--- a/arch/mips/ar7/clock.c
+++ b/arch/mips/ar7/clock.c
@@ -454,6 +454,17 @@ struct clk *clk_get(struct device *dev, const char *id)
 }
 EXPORT_SYMBOL(clk_get);
 
+struct clk *clk_get_optional(struct device *dev, const char *id)
+{
+	struct clk *clk = clk_get(dev, id);
+
+	if (clk == ERR_PTR(-ENOENT))
+		clk = NULL;
+
+	return clk;
+}
+EXPORT_SYMBOL(clk_get_optional);
+
 void clk_put(struct clk *clk)
 {
 }
-- 
2.17.1