ENGR00123278: Support clock operation functions

Support clock operation functions.

Signed-off-by: Terry Lv <r65388@freescale.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/common/cmd_clk.c b/common/cmd_clk.c
new file mode 100644
index 0000000..2f81492
--- /dev/null
+++ b/common/cmd_clk.c
@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
+ * Terry Lv
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <linux/types.h>
+#include <command.h>
+#include <common.h>
+#include <asm/clock.h>
+
+int do_clkops(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int rc = 0;
+	int freq = 0;
+
+	switch (argc) {
+	case 1:
+		clk_info(ALL_CLK);
+		break;
+	case 2:
+		if (strcmp(argv[1], "core") == 0)
+			clk_info(CPU_CLK);
+		else if (strcmp(argv[1], "ddr") == 0)
+			clk_info(DDR_CLK);
+		else
+			printf("Unsupported clock type!\n");
+		break;
+	case 3:
+		freq = simple_strtoul(argv[2], NULL, 10);
+		if (strcmp(argv[1], "core") == 0)
+			clk_config(CONFIG_REF_CLK_FREQ, freq, CPU_CLK);
+		else if (strcmp(argv[1], "ddr") == 0)
+			clk_config(CONFIG_REF_CLK_FREQ, freq, DDR_CLK);
+		else
+			printf("Unsupported clock type!\n");
+		break;
+	default:
+		rc = 1;
+		printf("Too much parameters.\n");
+		printf("Usage:\n%s\n", cmdtp->usage);
+		break;
+	}
+
+	return rc;
+}
+
+U_BOOT_CMD(
+	clk, 3, 1, do_clkops,
+	"Clock sub system",
+	"Setup/Display clock\n"
+	"clk - Display all clocks\n"
+	"clk core <core clock in MHz> - Setup/Display core clock\n"
+	"clk ddr <DDR clock in MHz> - Setup/Display DDR clock\n"
+	"Example:\n"
+	"clk - Show various clocks\n"
+	"clk core 665 - Set core clock to 665MHz\n"
+	"clk ddr 166 - Set DDR clock to 166MHz");
+