linux-kernel - [PATCH 4/4] ARM: OMAP2+: dts: HACK: Provide alias to USB PHY clock

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Date:	Tue, 18 Jun 2013 14:11:31 +0300
From:	Roger Quadros <rogerq@...com>
To:	<tony@...mide.com>, <b-cousson@...com>
CC:	<linux-omap@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH 4/4] ARM: OMAP2+: dts: HACK: Provide alias to USB PHY clock

Till the OMAP clocks are correctly defined in device tree, use
this temporary hack to provide clock alias to the USB PHY clocks.

Without this, USB Host & Ethernet will not be functional with
device tree boots on Panda and uEVM.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 arch/arm/mach-omap2/board-generic.c |   23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 88aa6b1..2b2d0de 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -15,6 +15,7 @@
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/irqdomain.h>
+#include <linux/clk.h>
 
 #include <asm/mach/arch.h>
 
@@ -35,6 +36,21 @@ static struct of_device_id omap_dt_match_table[] __initdata = {
 	{ }
 };
 
+/*
+ * HACK: create alias for USB host PHY clock.
+ * Remove this when clock phandle can be provided via DT
+ */
+static void __init legacy_init_ehci_clk(char *clkname)
+{
+	int ret;
+
+	ret = clk_add_alias("main_clk", NULL, clkname, NULL);
+	if (ret) {
+		pr_err("%s:Failed to add main_clk alias to %s :%d\n",
+						__func__, clkname, ret);
+	}
+}
+
 static void __init omap_generic_init(void)
 {
 	omap_sdrc_init(NULL, NULL);
@@ -45,10 +61,15 @@ static void __init omap_generic_init(void)
 	 * HACK: call display setup code for selected boards to enable omapdss.
 	 * This will be removed when omapdss supports DT.
 	 */
-	if (of_machine_is_compatible("ti,omap4-panda"))
+	if (of_machine_is_compatible("ti,omap4-panda")) {
 		omap4_panda_display_init_of();
+		legacy_init_ehci_clk("auxclk3_ck");
+
+	}
 	else if (of_machine_is_compatible("ti,omap4-sdp"))
 		omap_4430sdp_display_init_of();
+	else if (of_machine_is_compatible("ti,omap5-uevm"))
+		legacy_init_ehci_clk("auxclk1_ck");
 }
 
 #ifdef CONFIG_SOC_OMAP2420
-- 
1.7.4.1

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