linux-kernel - [PATCH 3.12 077/235] ARM: davinci: da850: don't add emac clock to lookup table twice

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Date:   Fri, 27 Jan 2017 11:53:30 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Sekhar Nori <nsekhar@...com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 077/235] ARM: davinci: da850: don't add emac clock to lookup table twice

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ef37427ac5677331145ab27a17e6f5f1b43f0c11 upstream.

Similarly to the aemif clock - this screws up the linked list of clock
children. Create a separate clock for mdio inheriting the rate from
emac_clk.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
[nsekhar@...com: add a comment over mdio_clk to explaing its existence +
		 commit headline updates]
Signed-off-by: Sekhar Nori <nsekhar@...com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arm/mach-davinci/da850.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index f56e5fbfa2fd..25f11492c33f 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -297,6 +297,16 @@ static struct clk emac_clk = {
 	.gpsc		= 1,
 };
 
+/*
+ * In order to avoid adding the emac_clk to the clock lookup table twice (and
+ * screwing up the linked list in the process) create a separate clock for
+ * mdio inheriting the rate from emac_clk.
+ */
+static struct clk mdio_clk = {
+	.name		= "mdio",
+	.parent		= &emac_clk,
+};
+
 static struct clk mcasp_clk = {
 	.name		= "mcasp",
 	.parent		= &pll0_sysclk2,
@@ -461,7 +471,7 @@ static struct clk_lookup da850_clks[] = {
 	CLK(NULL,		"arm",		&arm_clk),
 	CLK(NULL,		"rmii",		&rmii_clk),
 	CLK("davinci_emac.1",	NULL,		&emac_clk),
-	CLK("davinci_mdio.0",	"fck",		&emac_clk),
+	CLK("davinci_mdio.0",	"fck",		&mdio_clk),
 	CLK("davinci-mcasp.0",	NULL,		&mcasp_clk),
 	CLK("da8xx_lcdc.0",	"fck",		&lcdc_clk),
 	CLK("da830-mmc.0",	NULL,		&mmcsd0_clk),
-- 
2.11.0