u-boot/arch/arm/mach-uniphier/early-clk/early-clk-ld11.c
Masahiro Yamada 667dbcd01d ARM: uniphier: add PH1-LD11 SoC support
This is a low-cost ARMv8 SoC from Socionext Inc.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-05-26 00:37:13 +09:00

32 lines
643 B
C

/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <linux/io.h>
#include "../init.h"
#include "../sc64-regs.h"
int uniphier_ld11_early_clk_init(const struct uniphier_board_data *bd)
{
u32 tmp;
/* deassert reset */
tmp = readl(SC_RSTCTRL7);
tmp |= SC_RSTCTRL7_UMC31 | SC_RSTCTRL7_UMC30;
writel(tmp, SC_RSTCTRL7);
/* provide clocks */
tmp = readl(SC_CLKCTRL4);
tmp |= SC_CLKCTRL4_PERI;
writel(tmp, SC_CLKCTRL4);
tmp = readl(SC_CLKCTRL7);
tmp |= SC_CLKCTRL7_UMC31 | SC_CLKCTRL7_UMC30;
writel(tmp, SC_CLKCTRL7);
return 0;
}