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u-boot/arch/arm/mach-uniphier/debug-uart/debug-uart-pro4.c
Masahiro Yamada 739ba41d5a ARM: uniphier: de-couple SC macros into base address and offset
The SC_* macros represent the address of SysCtrl registers.
For a planned new SoC, its base address will be changed.

Turn the SC_* macros into the offset from the base address.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-07-10 22:42:02 +09:00

30 lines
646 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <config.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include "../sc-regs.h"
#include "../sg-regs.h"
#include "debug-uart.h"
#define UNIPHIER_PRO4_UART_CLK 73728000
unsigned int uniphier_pro4_debug_uart_init(void)
{
u32 tmp;
sg_set_iectrl(0);
sg_set_pinsel(128, 0, 4, 8); /* TXD0 -> TXD0 */
writel(1, sg_base + SG_LOADPINCTRL);
tmp = readl(sc_base + SC_CLKCTRL);
tmp |= SC_CLKCTRL_CEN_PERI;
writel(tmp, sc_base + SC_CLKCTRL);
return DIV_ROUND_CLOSEST(UNIPHIER_PRO4_UART_CLK, 16 * CONFIG_BAUDRATE);
}