| // SPDX-License-Identifier: GPL-2.0-or-later | |
| /* | |
| * MX35 CPU type detection | |
| * | |
| * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
| */ | |
| #include <linux/module.h> | |
| #include <linux/io.h> | |
| #include "hardware.h" | |
| #include "iim.h" | |
| static int mx35_cpu_rev = -1; | |
| static int mx35_read_cpu_rev(void) | |
| { | |
| u32 rev; | |
| rev = imx_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV)); | |
| switch (rev) { | |
| case 0x00: | |
| return IMX_CHIP_REVISION_1_0; | |
| case 0x10: | |
| return IMX_CHIP_REVISION_2_0; | |
| case 0x11: | |
| return IMX_CHIP_REVISION_2_1; | |
| default: | |
| return IMX_CHIP_REVISION_UNKNOWN; | |
| } | |
| } | |
| int mx35_revision(void) | |
| { | |
| if (mx35_cpu_rev == -1) | |
| mx35_cpu_rev = mx35_read_cpu_rev(); | |
| return mx35_cpu_rev; | |
| } | |
| EXPORT_SYMBOL(mx35_revision); |