/* * 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. * */ #include <init.h> #include <common.h> #include <io.h> #include <mach/generic.h> #include <mach/revision.h> #include <mach/imx8mq-regs.h> #define IMX8MQ_ROM_VERSION_A0 0x800 #define IMX8MQ_ROM_VERSION_B0 0x83C #define MX8MQ_ANATOP_DIGPROG 0x6c static void imx8mq_silicon_revision(void) { void __iomem *anatop = IOMEM(MX8MQ_ANATOP_BASE_ADDR); uint32_t reg = readl(anatop + MX8MQ_ANATOP_DIGPROG); uint32_t type = (reg >> 16) & 0xff; uint32_t rom_version; const char *cputypestr; reg &= 0xff; if (reg == IMX_CHIP_REV_1_0) { /* * For B0 chip, the DIGPROG is not updated, still TO1.0. * we have to check ROM version further */ rom_version = readl(IOMEM(IMX8MQ_ROM_VERSION_A0)); if (rom_version != IMX_CHIP_REV_1_0) { rom_version = readl(IOMEM(IMX8MQ_ROM_VERSION_B0)); if (rom_version >= IMX_CHIP_REV_2_0) reg = IMX_CHIP_REV_2_0; } } switch (type) { case 0x82: cputypestr = "i.MX8MQ"; break; default: cputypestr = "unknown i.MX8M"; break; }; imx_set_silicon_revision(cputypestr, reg); } int imx8mq_init(void) { imx8mq_silicon_revision(); return 0; }