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/*
* (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], "periph") == 0)
clk_info(PERIPH_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], "periph") == 0)
clk_config(CONFIG_REF_CLK_FREQ, freq, PERIPH_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 periph <peripheral clock in MHz> -"
"Setup/Display peripheral 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 periph 600 - Set peripheral clock to 600MHz\n"
"clk ddr 166 - Set DDR clock to 166MHz");
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