diff options
Diffstat (limited to 'arch/arm/mach-mx2/cpu_imx27.c')
-rw-r--r-- | arch/arm/mach-mx2/cpu_imx27.c | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/arch/arm/mach-mx2/cpu_imx27.c b/arch/arm/mach-mx2/cpu_imx27.c deleted file mode 100644 index d8d3b2d84dc..00000000000 --- a/arch/arm/mach-mx2/cpu_imx27.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * 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 <mach/hardware.h> - -static int cpu_silicon_rev = -1; -static int cpu_partnumber; - -#define SYS_CHIP_ID 0x00 /* The offset of CHIP ID register */ - -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(MX27_IO_ADDRESS(MX27_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); |