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From: Alexander Shiyan <shc_work@mail.ru>
To: barebox@lists.infradead.org
Subject: [PATCH 2/2] i.MX51 clock: Added USB clock to dump_clocks command.
Date: Wed, 30 May 2012 15:21:45 +0400	[thread overview]
Message-ID: <1338376905-24331-2-git-send-email-shc_work@mail.ru> (raw)
In-Reply-To: <1338376905-24331-1-git-send-email-shc_work@mail.ru>


Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
---
 arch/arm/mach-imx/speed-imx51.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-imx/speed-imx51.c b/arch/arm/mach-imx/speed-imx51.c
index b691d37..a94b392 100644
--- a/arch/arm/mach-imx/speed-imx51.c
+++ b/arch/arm/mach-imx/speed-imx51.c
@@ -199,6 +199,28 @@ unsigned long imx_get_mmcclk(void)
 	return rate / (prediv * podf);
 }
 
+unsigned long imx_get_usbclk(void)
+{
+	u32 reg, prediv, podf, rate;
+
+	reg = ccm_readl(MX5_CCM_CSCMR1);
+	reg &= MX5_CCM_CSCMR1_USBOH3_CLK_SEL_MASK;
+	reg >>= MX5_CCM_CSCMR1_USBOH3_CLK_SEL_OFFSET;
+	rate = get_rate_select(reg,
+			pll1_main_get_rate,
+			pll2_sw_get_rate,
+			pll3_sw_get_rate,
+			lp_apm_get_rate);
+
+	reg = ccm_readl(MX5_CCM_CSCDR1);
+	prediv = ((reg & MX5_CCM_CSCDR1_USBOH3_CLK_PRED_MASK) >>
+			MX5_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET) + 1;
+	podf = ((reg & MX5_CCM_CSCDR1_USBOH3_CLK_PODF_MASK) >>
+			MX5_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET) + 1;
+
+	return rate / (prediv * podf);
+}
+
 void imx_dump_clocks(void)
 {
 	printf("pll1:   %ld\n", pll1_main_get_rate());
@@ -209,4 +231,5 @@ void imx_dump_clocks(void)
 	printf("ipg:    %ld\n", imx_get_ipgclk());
 	printf("fec:    %ld\n", imx_get_fecclk());
 	printf("gpt:    %ld\n", imx_get_gptclk());
+	printf("usb:    %ld\n", imx_get_usbclk());
 }
-- 
1.7.3.4


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  reply	other threads:[~2012-05-30 11:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-30 11:21 [PATCH 1/2] i.MX51 clock: Added lp_apm clock support for frequency calculations Alexander Shiyan
2012-05-30 11:21 ` Alexander Shiyan [this message]
2012-05-31  7:00 ` Sascha Hauer

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