3 * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
5 * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/arch/hardware.h>
13 #include <asm/arch/at91_pmc.h>
14 #include <asm/arch/at91_pit.h>
15 #include <asm/arch/at91_gpbr.h>
16 #include <asm/arch/clk.h>
18 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
19 #define CONFIG_SYS_AT91_MAIN_CLOCK 0
22 int arch_cpu_init(void)
24 return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
27 void arch_preboot_os(void)
30 at91_pit_t *pit = (at91_pit_t *) ATMEL_BASE_PIT;
32 cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
36 * Add 0x1000 to current counter to stop it faster
37 * without waiting for wrapping back to 0
39 writel(cpiv + 0x1000, &pit->mr);
42 #if defined(CONFIG_DISPLAY_CPUINFO)
43 int print_cpuinfo(void)
47 printf("CPU: %s\n", ATMEL_CPU_NAME);
48 printf("Crystal frequency: %8s MHz\n",
49 strmhz(buf, get_main_clk_rate()));
50 printf("CPU clock : %8s MHz\n",
51 strmhz(buf, get_cpu_clk_rate()));
52 printf("Master clock : %8s MHz\n",
53 strmhz(buf, get_mck_clk_rate()));