diff options
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx25.c')
| -rw-r--r-- | arch/arm/mach-imx/cpu-imx25.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c index 96ec64b5ff7d..cc86977d0a34 100644 --- a/arch/arm/mach-imx/cpu-imx25.c +++ b/arch/arm/mach-imx/cpu-imx25.c @@ -1,16 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * MX25 CPU type detection * * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved - * - * 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. */ #include <linux/module.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> #include "iim.h" #include "hardware.h" @@ -20,13 +18,23 @@ static int mx25_cpu_rev = -1; static int mx25_read_cpu_rev(void) { u32 rev; + void __iomem *iim_base; + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx25-iim"); + iim_base = of_iomap(np, 0); + of_node_put(np); + BUG_ON(!iim_base); + rev = readl(iim_base + MXC_IIMSREV); + iounmap(iim_base); - rev = __raw_readl(MX25_IO_ADDRESS(MX25_IIM_BASE_ADDR + MXC_IIMSREV)); switch (rev) { case 0x00: return IMX_CHIP_REVISION_1_0; case 0x01: return IMX_CHIP_REVISION_1_1; + case 0x02: + return IMX_CHIP_REVISION_1_2; default: return IMX_CHIP_REVISION_UNKNOWN; } |