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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 3/4] ARM i.MX53: Setup USB clocks
Date: Thu, 12 Apr 2012 21:40:04 +0200	[thread overview]
Message-ID: <1334259605-21907-4-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1334259605-21907-1-git-send-email-s.hauer@pengutronix.de>

- get USB PHY clock from OSC (24MHz)
- adjust USB clock to 54MHz

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-imx/imx53.c |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-imx/imx53.c b/arch/arm/mach-imx/imx53.c
index 8742c46..b5dbc39 100644
--- a/arch/arm/mach-imx/imx53.c
+++ b/arch/arm/mach-imx/imx53.c
@@ -154,10 +154,15 @@ void imx53_init_lowlevel(unsigned int cpufreq_mhz)
 
 	writel(0x00016154, ccm + MX5_CCM_CBCMR);
 
-	/* change uart clk parent to pll2 */
 	r = readl(ccm + MX5_CCM_CSCMR1);
-	r &= ~(3 << 24);
-	r |= (1 << 24);
+
+	/* change uart clk parent to pll2 */
+	r &= ~MX5_CCM_CSCMR1_UART_CLK_SEL_MASK;
+	r |= 1 << MX5_CCM_CSCMR1_UART_CLK_SEL_OFFSET;
+
+	/* USB phy clock from osc */
+	r &= ~(1 << MX5_CCM_CSCMR1_USB_PHY_CLK_SEL_OFFSET);
+
 	writel(r, ccm + MX5_CCM_CSCMR1);
 
 	/* make sure change is effective */
@@ -187,6 +192,12 @@ void imx53_init_lowlevel(unsigned int cpufreq_mhz)
 	r &= ~MX5_CCM_CSCDR1_ESDHC3_MX53_CLK_PODF_MASK;
 	r |= 1 << MX5_CCM_CSCDR1_ESDHC3_MX53_CLK_PODF_OFFSET;
 
+	r &= ~MX5_CCM_CSCDR1_USBOH3_CLK_PRED_MASK;
+	r &= ~MX5_CCM_CSCDR1_USBOH3_CLK_PODF_MASK;
+
+	r |= 3 << MX5_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET;
+	r |= 1 << MX5_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET;
+
 	writel(r, ccm + MX5_CCM_CSCDR1);
 
 	/* Restore the default values in the Gate registers */
-- 
1.7.10


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  parent reply	other threads:[~2012-04-12 19:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-12 19:40 ehci patches Sascha Hauer
2012-04-12 19:40 ` [PATCH 1/4] USB ehci: make cache handling simpler Sascha Hauer
2012-04-12 19:40 ` [PATCH 2/4] USB ehci: speed up initialization Sascha Hauer
2012-04-12 19:40 ` Sascha Hauer [this message]
2012-04-12 19:40 ` [PATCH 4/4] ARM i.MX53 LOCO: Add USB support Sascha Hauer

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