/* * 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 <asm/syscounter.h> #include <asm/system.h> #include <mach/generic.h> #include <mach/revision.h> #include <mach/imx8mq.h> #include <mach/reset-reason.h> #include <linux/arm-smccc.h> #define FSL_SIP_BUILDINFO 0xC2000003 #define FSL_SIP_BUILDINFO_GET_COMMITHASH 0x00 static int imx8mq_init_syscnt_frequency(void) { if (current_el() == 3) { void __iomem *syscnt = IOMEM(MX8MQ_SYSCNT_CTRL_BASE_ADDR); /* * Update with accurate clock frequency */ set_cntfrq(syscnt_get_cntfrq(syscnt)); syscnt_enable(syscnt); } return 0; } /* * This call needs to happen before timer driver gets probed and * requests its update frequency via cntfrq_el0 */ core_initcall(imx8mq_init_syscnt_frequency); int imx8mq_init(void) { void __iomem *anatop = IOMEM(MX8MQ_ANATOP_BASE_ADDR); void __iomem *src = IOMEM(MX8MQ_SRC_BASE_ADDR); uint32_t type = FIELD_GET(DIGPROG_MAJOR, readl(anatop + MX8MQ_ANATOP_DIGPROG)); struct arm_smccc_res res; const char *cputypestr; imx8_boot_save_loc(); switch (type) { case IMX8M_CPUTYPE_IMX8MQ: cputypestr = "i.MX8MQ"; break; default: cputypestr = "unknown i.MX8M"; break; }; imx_set_silicon_revision(cputypestr, imx8mq_cpu_revision()); /* * Reset reasons seem to be identical to that of i.MX7 */ imx_set_reset_reason(src + IMX7_SRC_SRSR, imx7_reset_reasons); if (IS_ENABLED(CONFIG_ARM_SMCCC) && IS_ENABLED(CONFIG_FIRMWARE_IMX8MQ_ATF)) { arm_smccc_smc(FSL_SIP_BUILDINFO, FSL_SIP_BUILDINFO_GET_COMMITHASH, 0, 0, 0, 0, 0, 0, &res); pr_info("i.MX ARM Trusted Firmware: %s\n", (char *)&res.a0); } return 0; }