u-boot/board/intel/galileo/galileo.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

61 lines
1.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/device.h>
#include <asm/arch/quark.h>
/*
* Intel Galileo gen2 board uses GPIO Resume Well bank pin0 as the PERST# pin.
*
* We cannot use any public GPIO APIs in <asm-generic/gpio.h> to control this
* pin, as these APIs will eventually call into gpio_ich6_ofdata_to_platdata()
* in the Intel ICH6 GPIO driver where it calls PCI configuration space access
* APIs which will trigger PCI enumeration process.
*
* Check <asm/arch-quark/quark.h> for more details.
*/
void board_assert_perst(void)
{
u32 base, port, val;
/* retrieve the GPIO IO base */
qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, LB_GBA, &base);
base = (base & 0xffff) & ~0x7f;
/* enable the pin */
port = base + 0x20;
val = inl(port);
val |= (1 << 0);
outl(val, port);
/* configure the pin as output */
port = base + 0x24;
val = inl(port);
val &= ~(1 << 0);
outl(val, port);
/* pull it down (assert) */
port = base + 0x28;
val = inl(port);
val &= ~(1 << 0);
outl(val, port);
}
void board_deassert_perst(void)
{
u32 base, port, val;
/* retrieve the GPIO IO base */
qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, LB_GBA, &base);
base = (base & 0xffff) & ~0x7f;
/* pull it up (de-assert) */
port = base + 0x28;
val = inl(port);
val |= (1 << 0);
outl(val, port);
}