mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
be50972935
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h. Then, since asm/hardware.h only exists to include asm/arch/hardware.h, update everything to directly include asm/arch/hardware.h and remove asm/hardware.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
|
|
* Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
|
|
* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* i.MX27 specific CPU detection code
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/arch/hardware.h>
|
|
|
|
#include "crm_regs.h"
|
|
|
|
static int cpu_silicon_rev = -1;
|
|
static int cpu_partnumber;
|
|
|
|
static void query_silicon_parameter(void)
|
|
{
|
|
u32 val;
|
|
/*
|
|
* now we have access to the IO registers. As we need
|
|
* the silicon revision very early we read it here to
|
|
* avoid any further hooks
|
|
*/
|
|
val = __raw_readl(IO_ADDRESS(SYSCTRL_BASE_ADDR) + SYS_CHIP_ID);
|
|
|
|
cpu_silicon_rev = (int)(val >> 28);
|
|
cpu_partnumber = (int)((val >> 12) & 0xFFFF);
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* the silicon revision of the cpu
|
|
* -EINVAL - not a mx27
|
|
*/
|
|
int mx27_revision(void)
|
|
{
|
|
if (cpu_silicon_rev == -1)
|
|
query_silicon_parameter();
|
|
|
|
if (cpu_partnumber != 0x8821)
|
|
return -EINVAL;
|
|
|
|
return cpu_silicon_rev;
|
|
}
|
|
EXPORT_SYMBOL(mx27_revision);
|