diff options
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx27.c')
| -rw-r--r-- | arch/arm/mach-imx/cpu-imx27.c | 26 |
1 files changed, 11 insertions, 15 deletions
diff --git a/arch/arm/mach-imx/cpu-imx27.c b/arch/arm/mach-imx/cpu-imx27.c index 8d2ae4091465..1d2893908368 100644 --- a/arch/arm/mach-imx/cpu-imx27.c +++ b/arch/arm/mach-imx/cpu-imx27.c @@ -1,20 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * 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. */ /* @@ -22,6 +9,7 @@ */ #include <linux/io.h> +#include <linux/of_address.h> #include <linux/module.h> #include "hardware.h" @@ -30,16 +18,24 @@ static int mx27_cpu_rev = -1; static int mx27_cpu_partnumber; #define SYS_CHIP_ID 0x00 /* The offset of CHIP ID register */ +#define SYSCTRL_OFFSET 0x800 /* Offset from CCM base address */ static int mx27_read_cpu_rev(void) { + void __iomem *ccm_base; + struct device_node *np; u32 val; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx27-ccm"); + ccm_base = of_iomap(np, 0); + of_node_put(np); + BUG_ON(!ccm_base); /* * 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 = imx_readl(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + SYS_CHIP_ID)); + val = imx_readl(ccm_base + SYSCTRL_OFFSET + SYS_CHIP_ID); mx27_cpu_partnumber = (int)((val >> 12) & 0xFFFF); |