mirror of
https://github.com/u-boot/u-boot.git
synced 2025-04-25 23:06:15 +00:00
d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
50 lines
915 B
C
50 lines
915 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com>
|
|
*/
|
|
|
|
/*
|
|
* This library provides CMOS (inside RTC SRAM) access routines at a very
|
|
* early stage when driver model is not available yet. Only read access is
|
|
* provided. The 16-bit/32-bit read are compatible with driver model RTC
|
|
* uclass write ops, that data is stored in little-endian mode.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/early_cmos.h>
|
|
#include <asm/io.h>
|
|
|
|
u8 cmos_read8(u8 addr)
|
|
{
|
|
outb(addr, CMOS_IO_PORT);
|
|
|
|
return inb(CMOS_IO_PORT + 1);
|
|
}
|
|
|
|
u16 cmos_read16(u8 addr)
|
|
{
|
|
u16 value = 0;
|
|
u16 data;
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(value); i++) {
|
|
data = cmos_read8(addr + i);
|
|
value |= data << (i << 3);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
u32 cmos_read32(u8 addr)
|
|
{
|
|
u32 value = 0;
|
|
u32 data;
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(value); i++) {
|
|
data = cmos_read8(addr + i);
|
|
value |= data << (i << 3);
|
|
}
|
|
|
|
return value;
|
|
}
|