From: Ye.Li <B37916@freescale.com>
Date: Thu, 30 Oct 2014 10:20:58 +0000 (+0800)
Subject: imx: mx6sl: Set the preclk clock source to OSC 24Mhz
X-Git-Tag: v2015.01-rc1~35^2~8
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=0f8ec145ba1354a479abecf7f83a86bb6db04ba2;p=u-boot

imx: mx6sl: Set the preclk clock source to OSC 24Mhz

For MX6SL, uses the OSC 24Mhz as the preclk source in CCM. Align the
preclk setting with kernel.

Signed-off-by: Ye.Li <B37916@freescale.com>
---

diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index 6dc26003b6..c0bb431412 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -239,6 +239,18 @@ static void clear_mmdc_ch_mask(void)
 	writel(0, &mxc_ccm->ccdr);
 }
 
+#ifdef CONFIG_MX6SL
+static void set_preclk_from_osc(void)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	u32 reg;
+
+	reg = readl(&mxc_ccm->cscmr1);
+	reg |= MXC_CCM_CSCMR1_PER_CLK_SEL_MASK;
+	writel(reg, &mxc_ccm->cscmr1);
+}
+#endif
+
 int arch_cpu_init(void)
 {
 	init_aips();
@@ -254,6 +266,11 @@ int arch_cpu_init(void)
 	if (mxc_get_clock(MXC_ARM_CLK) == 396000000)
 		set_ahb_rate(132000000);
 
+		/* Set perclk to source from OSC 24MHz */
+#if defined(CONFIG_MX6SL)
+	set_preclk_from_osc();
+#endif
+
 	imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
 
 #ifdef CONFIG_APBH_DMA