mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
83d290c56f
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>
122 lines
3 KiB
C
122 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
|
|
* Copyright (C) 2011 Missing Link Electronics
|
|
* Joachim Foerster <joachim@missinglinkelectronics.com>
|
|
*/
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <malloc.h>
|
|
#include <fdtdec.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gpio.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
struct altera_pio_regs {
|
|
u32 data; /* Data register */
|
|
u32 direction; /* Direction register */
|
|
};
|
|
|
|
struct altera_pio_platdata {
|
|
struct altera_pio_regs *regs;
|
|
int gpio_count;
|
|
const char *bank_name;
|
|
};
|
|
|
|
static int altera_pio_direction_input(struct udevice *dev, unsigned pin)
|
|
{
|
|
struct altera_pio_platdata *plat = dev_get_platdata(dev);
|
|
struct altera_pio_regs *const regs = plat->regs;
|
|
|
|
clrbits_le32(®s->direction, 1 << pin);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int altera_pio_direction_output(struct udevice *dev, unsigned pin,
|
|
int val)
|
|
{
|
|
struct altera_pio_platdata *plat = dev_get_platdata(dev);
|
|
struct altera_pio_regs *const regs = plat->regs;
|
|
|
|
if (val)
|
|
setbits_le32(®s->data, 1 << pin);
|
|
else
|
|
clrbits_le32(®s->data, 1 << pin);
|
|
/* change the data first, then the direction. to avoid glitch */
|
|
setbits_le32(®s->direction, 1 << pin);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int altera_pio_get_value(struct udevice *dev, unsigned pin)
|
|
{
|
|
struct altera_pio_platdata *plat = dev_get_platdata(dev);
|
|
struct altera_pio_regs *const regs = plat->regs;
|
|
|
|
return readl(®s->data) & (1 << pin);
|
|
}
|
|
|
|
|
|
static int altera_pio_set_value(struct udevice *dev, unsigned pin, int val)
|
|
{
|
|
struct altera_pio_platdata *plat = dev_get_platdata(dev);
|
|
struct altera_pio_regs *const regs = plat->regs;
|
|
|
|
if (val)
|
|
setbits_le32(®s->data, 1 << pin);
|
|
else
|
|
clrbits_le32(®s->data, 1 << pin);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int altera_pio_probe(struct udevice *dev)
|
|
{
|
|
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
struct altera_pio_platdata *plat = dev_get_platdata(dev);
|
|
|
|
uc_priv->gpio_count = plat->gpio_count;
|
|
uc_priv->bank_name = plat->bank_name;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int altera_pio_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct altera_pio_platdata *plat = dev_get_platdata(dev);
|
|
|
|
plat->regs = map_physmem(devfdt_get_addr(dev),
|
|
sizeof(struct altera_pio_regs),
|
|
MAP_NOCACHE);
|
|
plat->gpio_count = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"altr,gpio-bank-width", 32);
|
|
plat->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
|
|
"gpio-bank-name", NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_gpio_ops altera_pio_ops = {
|
|
.direction_input = altera_pio_direction_input,
|
|
.direction_output = altera_pio_direction_output,
|
|
.get_value = altera_pio_get_value,
|
|
.set_value = altera_pio_set_value,
|
|
};
|
|
|
|
static const struct udevice_id altera_pio_ids[] = {
|
|
{ .compatible = "altr,pio-1.0" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(altera_pio) = {
|
|
.name = "altera_pio",
|
|
.id = UCLASS_GPIO,
|
|
.of_match = altera_pio_ids,
|
|
.ops = &altera_pio_ops,
|
|
.ofdata_to_platdata = altera_pio_ofdata_to_platdata,
|
|
.platdata_auto_alloc_size = sizeof(struct altera_pio_platdata),
|
|
.probe = altera_pio_probe,
|
|
};
|