u-boot/arch/arm/mach-uniphier/sbc/sbc-pxs2.c
Masahiro Yamada f7f390576d ARM: uniphier: check DT to determine whether to initialize SBC
If CONFIG_MICRO_SUPPORT_CARD is enabled, U-Boot initialize SBC
(System Bus Controller), which may not be really necessary.

Check the "socionext,uniphier-system-bus" node in DT run-time.
If and only if it is found and its "status" property is okay,
initialize the SBC block.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-07-10 22:41:57 +09:00

23 lines
402 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016-2017 Socionext Inc.
*/
#include <linux/io.h>
#include "../init.h"
#include "sbc-regs.h"
void uniphier_pxs2_sbc_init(void)
{
if (!uniphier_sbc_is_enabled())
return;
uniphier_sbc_init_savepin();
/* necessary for ROM boot ?? */
/* system bus output enable */
writel(0x17, PC0CTRL);
uniphier_pin_init("system-bus"); /* PXs3 */
}