diff options
Diffstat (limited to 'cpu/arm920t/s3c24x0/speed.c')
-rw-r--r-- | cpu/arm920t/s3c24x0/speed.c | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/cpu/arm920t/s3c24x0/speed.c b/cpu/arm920t/s3c24x0/speed.c deleted file mode 100644 index b13283a..0000000 --- a/cpu/arm920t/s3c24x0/speed.c +++ /dev/null @@ -1,98 +0,0 @@ -/* - * (C) Copyright 2001-2004 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * (C) Copyright 2002 - * David Mueller, ELSOFT AG, d.mueller@elsoft.ch - * - * 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 - */ - -/* This code should work for both the S3C2400 and the S3C2410 - * as they seem to have the same PLL and clock machinery inside. - * The different address mapping is handled by the s3c24xx.h files below. - */ - -#include <common.h> -#ifdef CONFIG_S3C24X0 - -#include <asm/io.h> -#include <asm/arch/s3c24x0_cpu.h> - -#define MPLL 0 -#define UPLL 1 - -/* ------------------------------------------------------------------------- */ -/* NOTE: This describes the proper use of this file. - * - * CONFIG_SYS_CLK_FREQ should be defined as the input frequency of the PLL. - * - * get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK() return the clock of - * the specified bus in HZ. - */ -/* ------------------------------------------------------------------------- */ - -static ulong get_PLLCLK(int pllreg) -{ - struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power(); - ulong r, m, p, s; - - if (pllreg == MPLL) - r = readl(&clk_power->MPLLCON); - else if (pllreg == UPLL) - r = readl(&clk_power->UPLLCON); - else - hang(); - - m = ((r & 0xFF000) >> 12) + 8; - p = ((r & 0x003F0) >> 4) + 2; - s = r & 0x3; - - return (CONFIG_SYS_CLK_FREQ * m) / (p << s); -} - -/* return FCLK frequency */ -ulong get_FCLK(void) -{ - return get_PLLCLK(MPLL); -} - -/* return HCLK frequency */ -ulong get_HCLK(void) -{ - struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power(); - - return (readl(&clk_power->CLKDIVN) & 2) ? get_FCLK() / 2 : get_FCLK(); -} - -/* return PCLK frequency */ -ulong get_PCLK(void) -{ - struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power(); - - return (readl(&clk_power->CLKDIVN) & 1) ? get_HCLK() / 2 : get_HCLK(); -} - -/* return UCLK frequency */ -ulong get_UCLK(void) -{ - return get_PLLCLK(UPLL); -} - -#endif /* CONFIG_S3C24X0 */ |