1 // SPDX-License-Identifier: GPL-2.0+
4 * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
6 * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
8 * Bo Shen <voice.shen@atmel.com>
16 #include <asm/arch/hardware.h>
17 #include <asm/arch/at91_pit.h>
18 #include <asm/arch/at91_gpbr.h>
19 #include <asm/arch/clk.h>
21 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
22 #define CONFIG_SYS_AT91_MAIN_CLOCK 0
25 int arch_cpu_init(void)
27 #if defined(CONFIG_CLK_CCF)
30 return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
34 void arch_preboot_os(void)
36 #if (IS_ENABLED(CONFIG_ATMEL_PIT_TIMER))
38 at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
40 cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
44 * Add 0x1000 to current counter to stop it faster
45 * without waiting for wrapping back to 0
47 writel(cpiv + 0x1000, &pit->mr);
51 #if defined(CONFIG_DISPLAY_CPUINFO)
52 int print_cpuinfo(void)
56 printf("CPU: %s\n", get_cpu_name());
57 printf("Crystal frequency: %8s MHz\n",
58 strmhz(buf, get_main_clk_rate()));
59 printf("CPU clock : %8s MHz\n",
60 strmhz(buf, get_cpu_clk_rate()));
61 printf("Master clock : %8s MHz\n",
62 strmhz(buf, get_mck_clk_rate()));
68 void enable_caches(void)
74 #define ATMEL_CHIPID_CIDR_VERSION 0x1f
76 unsigned int get_chip_id(void)
78 return readl(ATMEL_CHIPID_CIDR) & ~ATMEL_CHIPID_CIDR_VERSION;
81 unsigned int get_extension_chip_id(void)
83 return readl(ATMEL_CHIPID_EXID);