[PATCH v4 4/4] ARM: OMAP2+: Add pdata quirk for sys_clkout2 for omap3 DBB056

[Christoph Fritz <chf.fritz-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>]

Full device tree support for clock control, especially to set frequencies,
is not yet accomplished. Until then, configure the 24Mhz of sys_clkout2 to
feed an USB-Hub here.

Signed-off-by: Christoph Fritz <chf.fritz-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
---
 arch/arm/mach-omap2/pdata-quirks.c |   37 ++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 435a823..e36ac3f 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -172,6 +172,43 @@ static void __init am3517_evm_legacy_init(void)
 
 static void __init omap3_dbb056_legacy_init(void)
 {
+	struct clk *clkout2;
+	struct clk *cm96fck;
+
+	/* Reparent clkout2 to 96M_FCK */
+	pr_info("%s: Late Reparent clkout2 to 96M_FCK\n", __func__);
+	clkout2 = clk_get(NULL, "clkout2_src_ck");
+	if (clkout2 < 0) {
+		pr_err("a83x-quirk: couldn't get clkout2_src_ck\n");
+		return;
+	}
+	cm96fck = clk_get(NULL, "cm_96m_fck");
+	if (cm96fck < 0) {
+		pr_err("a83x-quirk: couldn't get cm_96m_fck\n");
+		return;
+	}
+	if (clk_set_parent(clkout2, cm96fck) < 0) {
+		pr_err("a83x-quirk: couldn't reparent clkout2_src_ck\n");
+		return;
+	}
+
+	/* Set clkout2 to 24MHz for internal usb hub*/
+	pr_info("%s: Set clkout2 to 24MHz for internal usb hub\n", __func__);
+	clkout2 = clk_get(NULL, "sys_clkout2");
+	if (clkout2 < 0) {
+		pr_err("%s: couldn't get sys_clkout2\n", __func__);
+		return;
+	}
+	if (clk_set_rate(clkout2, 24000000) < 0) {
+		pr_err("%s: couldn't set sys_clkout2 rate\n", __func__);
+		return;
+	}
+	if (clk_prepare_enable(clkout2) < 0) {
+		pr_err("%s: couldn't enable sys_clkout2\n", __func__);
+		return;
+	}
+
+	/* Initialize display */
 	omap3_dbb056_display_init_of();
 }
 #endif /* CONFIG_ARCH_OMAP3 */
-- 
1.7.10.4

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