adding i.MX31 CPU support

2 files changed, 64 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index a545a07be9..405c757ce1 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -1,6 +1,7 @@
 obj-y += clocksource.o
 obj-$(CONFIG_ARCH_IMX1) += speed-imx1.o
 obj-$(CONFIG_ARCH_IMX27) += speed-imx27.o
+obj-$(CONFIG_ARCH_IMX31) += speed-imx31.o
 obj-y += speed.o
 obj-y += gpio.o
 
diff --git a/arch/arm/mach-imx/speed-imx31.c b/arch/arm/mach-imx/speed-imx31.c
new file mode 100644
index 0000000000..ae39392730
--- /dev/null
+++ b/arch/arm/mach-imx/speed-imx31.c
@@ -0,0 +1,63 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+#include <init.h>
+
+ulong imx_get_mpl_dpdgck_clk(void)
+{
+	ulong infreq;
+
+	if ((__REG(CCM_CCMR) & CCMR_PRCS_MASK) == CCMR_FPM)
+		infreq = CONFIG_MX31_CLK32 * 1024;
+	else
+		infreq = CONFIG_MX31_HCLK_FREQ;
+
+	return imx_decode_pll(__REG(CCM_MPCTL), infreq);
+}
+
+ulong imx_get_mcu_main_clk(void)
+{
+	/* For now we assume mpl_dpdgck_clk == mcu_main_clk
+	 * which should be correct for most boards
+	 */
+	return imx_get_mpl_dpdgck_clk();
+}
+
+ulong imx_get_perclk1(void)
+{
+	u32 freq = imx_get_mcu_main_clk();
+	u32 pdr0 = __REG(CCM_PDR0);
+
+	freq /= ((pdr0 >> 3) & 0x7) + 1;
+	freq /= ((pdr0 >> 6) & 0x3) + 1;
+
+	return freq;
+}
+
+int imx_dump_clocks(void)
+{
+	ulong cpufreq = imx_get_mcu_main_clk();
+	printf("mx31 cpu clock: %dMHz\n",cpufreq / 1000000);
+	printf("ipg clock     : %dHz\n", imx_get_perclk1());
+
+	return 0;
+}
+
+late_initcall(imx_dump_clocks);