linux-kernel - [PATCH 2/4] ARM: imx: set CKO1 parent clock source in imx6q sabresd

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Date:	Tue, 29 Jan 2013 15:49:39 +0800
From:	Gary Zhang <b13634@...escale.com>
To:	<shawn.guo@...aro.org>, <kernel@...gutronix.de>,
	<linux@....linux.org.uk>
CC:	<linux-kernel@...r.kernel.org>
Subject: [PATCH 2/4] ARM: imx: set CKO1 parent clock source in imx6q sabresd

in imx6q sabresd board, wm8962 uses CKO1 as MCLK. set ahb as CKO1
parent clock source

Signed-off-by: Gary Zhang <b13634@...escale.com>
---
 arch/arm/mach-imx/mach-imx6q.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 4eb1b3a..ee3f357 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -151,6 +151,36 @@ static void __init imx6q_sabrelite_init(void)
 	imx6q_sabrelite_cko1_setup();
 }
 
+static void __init imx6q_sabresd_cko1_setup(void)
+{
+	struct clk *cko1_sel, *ahb, *cko1;
+	unsigned long rate;
+
+	cko1_sel = clk_get_sys(NULL, "cko1_sel");
+	ahb = clk_get_sys(NULL, "ahb");
+	cko1 = clk_get_sys(NULL, "cko1");
+	if (IS_ERR(cko1_sel) || IS_ERR(ahb) || IS_ERR(cko1)) {
+		pr_err("cko1 setup failed!\n");
+		goto put_clk;
+	}
+	clk_set_parent(cko1_sel, ahb);
+	rate = clk_round_rate(cko1, 24000000);
+	clk_set_rate(cko1, rate);
+
+	return;
+put_clk:
+	if (!IS_ERR(cko1_sel))
+		clk_put(cko1_sel);
+	if (!IS_ERR(ahb))
+		clk_put(ahb);
+	if (!IS_ERR(cko1))
+		clk_put(cko1);
+}
+static void __init imx6q_sabresd_init(void)
+{
+	imx6q_sabresd_cko1_setup();
+}
+
 static void __init imx6q_1588_init(void)
 {
 	struct regmap *gpr;
@@ -193,6 +223,8 @@ static void __init imx6q_init_machine(void)
 {
 	if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
 		imx6q_sabrelite_init();
+	else if (of_machine_is_compatible("fsl,imx6q-sabresd"))
+		imx6q_sabresd_init();
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 
-- 
1.7.0.4


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