1 /*
2  * (C) Copyright 2010
3  * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
4  * (C) Copyright 2009
5  * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 
10 #include <common.h>
11 #include <asm/io.h>
12 #include <asm/arch/hardware.h>
13 #include <asm/arch/at91_pit.h>
14 #include <asm/arch/at91_gpbr.h>
15 #include <asm/arch/clk.h>
16 
17 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
18 #define CONFIG_SYS_AT91_MAIN_CLOCK 0
19 #endif
20 
21 int arch_cpu_init(void)
22 {
23 	return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
24 }
25 
26 void arch_preboot_os(void)
27 {
28 	ulong cpiv;
29 	at91_pit_t *pit = (at91_pit_t *) ATMEL_BASE_PIT;
30 
31 	cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
32 
33 	/*
34 	 * Disable PITC
35 	 * Add 0x1000 to current counter to stop it faster
36 	 * without waiting for wrapping back to 0
37 	 */
38 	writel(cpiv + 0x1000, &pit->mr);
39 }
40 
41 #if defined(CONFIG_DISPLAY_CPUINFO)
42 int print_cpuinfo(void)
43 {
44 	char __maybe_unused buf[32];
45 
46 	printf("CPU: %s\n", ATMEL_CPU_NAME);
47 	printf("Crystal frequency: %8s MHz\n",
48 					strmhz(buf, get_main_clk_rate()));
49 	printf("CPU clock        : %8s MHz\n",
50 					strmhz(buf, get_cpu_clk_rate()));
51 	printf("Master clock     : %8s MHz\n",
52 					strmhz(buf, get_mck_clk_rate()));
53 
54 	return 0;
55 }
56 #endif
57