diff options
Diffstat (limited to 'arch/arm/mach-uniphier/early-clk/early-clk-ld4.c')
-rw-r--r-- | arch/arm/mach-uniphier/early-clk/early-clk-ld4.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/early-clk/early-clk-ld4.c b/arch/arm/mach-uniphier/early-clk/early-clk-ld4.c new file mode 100644 index 0000000000..6574767f30 --- /dev/null +++ b/arch/arm/mach-uniphier/early-clk/early-clk-ld4.c @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2011-2015 Masahiro Yamada <yamada.m@jp.panasonic.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <spl.h> +#include <linux/io.h> + +#include "../init.h" +#include "../sc-regs.h" + +int ph1_ld4_early_clk_init(const struct uniphier_board_data *bd) +{ + u32 tmp; + + /* deassert reset */ + tmp = readl(SC_RSTCTRL); + + tmp |= SC_RSTCTRL_NRST_UMC1 | SC_RSTCTRL_NRST_UMC0; + if (spl_boot_device() != BOOT_DEVICE_NAND) + tmp &= ~SC_RSTCTRL_NRST_NAND; + writel(tmp, SC_RSTCTRL); + readl(SC_RSTCTRL); /* dummy read */ + + /* privide clocks */ + tmp = readl(SC_CLKCTRL); + tmp |= SC_CLKCTRL_CEN_UMC | SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI; + writel(tmp, SC_CLKCTRL); + readl(SC_CLKCTRL); /* dummy read */ + + return 0; +} |