mirror of
https://github.com/AsahiLinux/u-boot
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4c54419737
Adding Freeze Controller driver. All HPS IOs need to be in freeze state during pin mux or IO buffer configuration. It is to avoid any glitch which might happen during the configuration from propagating to external devices. Signed-off-by: Chin Liang See <clsee@altera.com> Cc: Wolfgang Denk <wd@denx.de> CC: Pavel Machek <pavel@denx.de> Cc: Dinh Nguyen <dinguyen@altera.com> Cc: Tom Rini <trini@ti.com> Cc: Albert Aribaud <albert.u.boot@aribaud.net>
48 lines
1 KiB
C
48 lines
1 KiB
C
/*
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* Copyright (C) 2012 Altera Corporation <www.altera.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/u-boot.h>
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#include <asm/utils.h>
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#include <version.h>
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#include <image.h>
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#include <asm/arch/reset_manager.h>
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#include <spl.h>
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#include <asm/arch/system_manager.h>
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#include <asm/arch/freeze_controller.h>
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DECLARE_GLOBAL_DATA_PTR;
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u32 spl_boot_device(void)
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{
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return BOOT_DEVICE_RAM;
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}
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/*
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* Board initialization after bss clearance
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*/
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void spl_board_init(void)
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{
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#ifndef CONFIG_SOCFPGA_VIRTUAL_TARGET
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debug("Freezing all I/O banks\n");
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/* freeze all IO banks */
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sys_mgr_frzctrl_freeze_req();
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/* configure the pin muxing through system manager */
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sysmgr_pinmux_init();
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#endif /* CONFIG_SOCFPGA_VIRTUAL_TARGET */
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/* de-assert reset for peripherals and bridges based on handoff */
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reset_deassert_peripherals_handoff();
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debug("Unfreezing/Thaw all I/O banks\n");
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/* unfreeze / thaw all IO banks */
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sys_mgr_frzctrl_thaw_req();
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/* enable console uart printing */
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preloader_console_init();
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}
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