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authorYe.Li <B37916@freescale.com>2014-09-16 17:40:53 +0800
committerYe.Li <B37916@freescale.com>2014-09-18 11:11:04 +0800
commit1e468dfbe7c5ae117482d1dccaff94b8652f32aa (patch)
tree1d83cdc0898decc677203a707799fd7e7bfdb6d0 /arch/arm/cpu/armv7
parent1c6f3b6ec717bdf7e6a26996e399e050f66abcce (diff)
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ENGR00331706-4 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>
Diffstat (limited to 'arch/arm/cpu/armv7')
-rw-r--r--arch/arm/cpu/armv7/mx6/soc.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index 8b6b7c1..f1d2cea 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -393,6 +393,17 @@ static void init_bandgap(void)
writel(BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF, &mxc_ccm->ana_misc0_set);
}
+#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
#ifdef CONFIG_MX6SX
void vadc_power_up(void)
@@ -537,6 +548,11 @@ 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 */
#ifndef CONFIG_MX6SL