linux-kernel - [PATCH 1/4] CLK: ti: dra7: Initialize USB

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Date:	Thu, 1 Aug 2013 17:58:51 +0300
From:	Roger Quadros <rogerq@...com>
To:	<tony@...mide.com>, <rnayak@...com>
CC:	<benoit.cousson@...aro.org>, <balbi@...com>,
	<george.cherian@...com>, <kishon@...com>, <dmurphy@...com>,
	<t-kristo@...com>, <linux-omap@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Roger Quadros <rogerq@...com>
Subject: [PATCH 1/4] CLK: ti: dra7: Initialize USB_DPLL

USB_DPLL must be initialized and locked at boot so that
USB modules can work.

Also program USB_DLL_M2 output to half rate.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 drivers/clk/omap/clk-7xx.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/clk/omap/clk-7xx.c b/drivers/clk/omap/clk-7xx.c
index ddb39dd..f444513 100644
--- a/drivers/clk/omap/clk-7xx.c
+++ b/drivers/clk/omap/clk-7xx.c
@@ -19,6 +19,7 @@
 
 #define DRA7_DPLL_ABE_DEFFREQ				361267200
 #define DRA7_DPLL_GMAC_DEFFREQ				1000000000
+#define DRA7_DPLL_USB_DEFFREQ				960000000
 
 
 static struct omap_dt_clk dra7xx_clks[] = {
@@ -63,5 +64,15 @@ int __init dra7xx_clk_init(void)
 	if (rc)
 		pr_err("%s: failed to configure GMAC DPLL!\n", __func__);
 
+	dpll_ck = clk_get_sys(NULL, "dpll_usb_ck");
+	rc = clk_set_rate(dpll_ck, DRA7_DPLL_USB_DEFFREQ);
+	if (rc)
+		pr_err("%s: failed to configure USB DPLL!\n", __func__);
+
+	dpll_ck = clk_get_sys(NULL, "dpll_usb_m2_ck");
+	rc = clk_set_rate(dpll_ck, DRA7_DPLL_USB_DEFFREQ/2);
+	if (rc)
+		pr_err("%s: failed to set USB_DPLL M2 OUT\n", __func__);
+
 	return rc;
 }
-- 
1.7.4.1

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