/* * (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 if (strcmp(argv[1], "nfc") == 0) clk_info(NFC_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 if (strcmp(argv[1], "nfc") == 0) clk_config(CONFIG_REF_CLK_FREQ, freq, NFC_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" "clk nfc <NFC clk in MHz> - Setup/Display NFC 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");