initial_commit

1 files changed, 90 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/cpu.c b/arch/arm/plat-mxc/cpu.c
new file mode 100755
index 00000000..eb163abd
--- /dev/null
+++ b/arch/arm/plat-mxc/cpu.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2011-2012 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/module.h>
+#include <mach/clock.h>
+#include <mach/hardware.h>
+
+unsigned int __mxc_cpu_type;
+EXPORT_SYMBOL(__mxc_cpu_type);
+extern int mxc_early_serial_console_init(unsigned long base, struct clk *clk);
+void (*set_num_cpu_op)(int num);
+
+void mxc_set_cpu_type(unsigned int type)
+{
+	__mxc_cpu_type = type;
+}
+
+void imx_print_silicon_rev(const char *cpu, int srev)
+{
+	if (srev == IMX_CHIP_REVISION_UNKNOWN)
+		pr_info("CPU identified as %s, unknown revision\n", cpu);
+	else
+		pr_info("CPU identified as %s, silicon rev %d.%d\n",
+				cpu, (srev >> 4) & 0xf, srev & 0xf);
+}
+
+int mxc_jtag_enabled;		/* OFF: 0 (default), ON: 1 */
+int uart_at_24; 			/* OFF: 0 (default); ON: 1 */
+/*
+ * Here are the JTAG options from the command line. By default JTAG
+ * is OFF which means JTAG is not connected and WFI is enabled
+ *
+ *       "on" --  JTAG is connected, so WFI is disabled
+ *       "off" -- JTAG is disconnected, so WFI is enabled
+ */
+
+static int __init jtag_wfi_setup(char *p)
+{
+	if (memcmp(p, "on", 2) == 0) {
+		mxc_jtag_enabled = 1;
+		p += 2;
+	} else if (memcmp(p, "off", 3) == 0) {
+		mxc_jtag_enabled = 0;
+		p += 3;
+	}
+	return 0;
+}
+early_param("jtag", jtag_wfi_setup);
+
+
+static int __init setup_debug_uart(char *p)
+{
+	uart_at_24 = 1;
+	return 0;
+}
+
+early_param("debug_uart", setup_debug_uart);
+
+/**
+ * early_console_setup - setup debugging console
+ *
+ * Consoles started here require little enough setup that we can start using
+ * them very early in the boot process, either right after the machine
+ * vector initialization, or even before if the drivers can detect their hw.
+ *
+ * Returns non-zero if a console couldn't be setup.
+ * This function is developed based on
+ * early_console_setup function as defined in arch/ia64/kernel/setup.c
+ */
+void __init early_console_setup(unsigned long base, struct clk *clk)
+{
+#ifdef CONFIG_SERIAL_IMX_CONSOLE
+	mxc_early_serial_console_init(base, clk);
+#endif
+}