2 * Copyright (C) 2013 Atmel Corporation
3 * Bo Shen <voice.shen@atmel.com>
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/at91_common.h>
11 #include <asm/arch/at91_pmc.h>
12 #include <asm/arch/at91_wdt.h>
13 #include <asm/arch/clk.h>
16 static void at91_disable_wdt(void)
18 struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
20 writel(AT91_WDT_MR_WDDIS, &wdt->mr);
23 void at91_plla_init(u32 pllar)
25 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
27 writel(pllar, &pmc->pllar);
28 while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY)))
32 void at91_mck_init(u32 mckr)
34 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
37 tmp = readl(&pmc->mckr);
38 tmp &= ~(AT91_PMC_MCKR_PRES_MASK |
39 AT91_PMC_MCKR_MDIV_MASK |
40 AT91_PMC_MCKR_PLLADIV_2);
41 tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK |
42 AT91_PMC_MCKR_MDIV_MASK |
43 AT91_PMC_MCKR_PLLADIV_2);
44 writel(tmp, &pmc->mckr);
46 while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
51 u32 spl_boot_device(void)
53 #ifdef CONFIG_SYS_USE_MMC
54 return BOOT_DEVICE_MMC1;
55 #elif CONFIG_SYS_USE_SERIALFLASH
56 return BOOT_DEVICE_SPI;
58 return BOOT_DEVICE_NONE;
61 u32 spl_boot_mode(void)
63 switch (spl_boot_device()) {
64 #ifdef CONFIG_SYS_USE_MMC
65 case BOOT_DEVICE_MMC1:
66 return MMCSD_MODE_FAT;
69 case BOOT_DEVICE_NONE:
77 /* disable watchdog */
80 /* PMC configuration */
83 at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
89 preloader_console_init();