1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2010
4  * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
5  * (C) Copyright 2009
6  * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
7  */
8 
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/arch/hardware.h>
12 #include <asm/arch/at91_pit.h>
13 #include <asm/arch/at91_gpbr.h>
14 #include <asm/arch/clk.h>
15 
16 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
17 #define CONFIG_SYS_AT91_MAIN_CLOCK 0
18 #endif
19 
20 int arch_cpu_init(void)
21 {
22 	return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
23 }
24 
25 void arch_preboot_os(void)
26 {
27 	ulong cpiv;
28 	at91_pit_t *pit = (at91_pit_t *) ATMEL_BASE_PIT;
29 
30 	cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
31 
32 	/*
33 	 * Disable PITC
34 	 * Add 0x1000 to current counter to stop it faster
35 	 * without waiting for wrapping back to 0
36 	 */
37 	writel(cpiv + 0x1000, &pit->mr);
38 }
39 
40 #if defined(CONFIG_DISPLAY_CPUINFO)
41 int print_cpuinfo(void)
42 {
43 	char __maybe_unused buf[32];
44 
45 	printf("CPU: %s\n", ATMEL_CPU_NAME);
46 	printf("Crystal frequency: %8s MHz\n",
47 					strmhz(buf, get_main_clk_rate()));
48 	printf("CPU clock        : %8s MHz\n",
49 					strmhz(buf, get_cpu_clk_rate()));
50 	printf("Master clock     : %8s MHz\n",
51 					strmhz(buf, get_mck_clk_rate()));
52 
53 	return 0;
54 }
55 #endif
56