mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-10-31 00:11:51 +01:00
d100d3e18e
Add Faraday Technology's FTGPIO010 controller driver. Signed-off-by: Sergei Antonov <saproj@gmail.com>
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Faraday Technology's FTGPIO010 controller.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gpio.h>
|
|
|
|
struct ftgpio010_regs {
|
|
u32 out;
|
|
u32 in;
|
|
u32 direction; // 1 - output
|
|
u32 reserved;
|
|
u32 set;
|
|
u32 clear;
|
|
};
|
|
|
|
struct ftgpio010_plat {
|
|
struct ftgpio010_regs __iomem *regs;
|
|
};
|
|
|
|
static int ftgpio010_direction_input(struct udevice *dev, unsigned int pin)
|
|
{
|
|
struct ftgpio010_plat *plat = dev_get_plat(dev);
|
|
struct ftgpio010_regs *const regs = plat->regs;
|
|
|
|
clrbits_le32(®s->direction, 1 << pin);
|
|
return 0;
|
|
}
|
|
|
|
static int ftgpio010_direction_output(struct udevice *dev, unsigned int pin,
|
|
int val)
|
|
{
|
|
struct ftgpio010_plat *plat = dev_get_plat(dev);
|
|
struct ftgpio010_regs *const regs = plat->regs;
|
|
|
|
/* change the data first, then the direction. to avoid glitch */
|
|
out_le32(val ? ®s->set : ®s->clear, 1 << pin);
|
|
setbits_le32(®s->direction, 1 << pin);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ftgpio010_get_value(struct udevice *dev, unsigned int pin)
|
|
{
|
|
struct ftgpio010_plat *plat = dev_get_plat(dev);
|
|
struct ftgpio010_regs *const regs = plat->regs;
|
|
|
|
return in_le32(®s->in) >> pin & 1;
|
|
}
|
|
|
|
static int ftgpio010_set_value(struct udevice *dev, unsigned int pin, int val)
|
|
{
|
|
struct ftgpio010_plat *plat = dev_get_plat(dev);
|
|
struct ftgpio010_regs *const regs = plat->regs;
|
|
|
|
out_le32(val ? ®s->set : ®s->clear, 1 << pin);
|
|
return 0;
|
|
}
|
|
|
|
static int ftgpio010_get_function(struct udevice *dev, unsigned int pin)
|
|
{
|
|
struct ftgpio010_plat *plat = dev_get_plat(dev);
|
|
struct ftgpio010_regs *const regs = plat->regs;
|
|
|
|
if (in_le32(®s->direction) >> pin & 1)
|
|
return GPIOF_OUTPUT;
|
|
return GPIOF_INPUT;
|
|
}
|
|
|
|
static int ftgpio010_probe(struct udevice *dev)
|
|
{
|
|
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
uc_priv->gpio_count = ofnode_read_u32_default(dev_ofnode(dev),
|
|
"nr-gpios", 32);
|
|
return 0;
|
|
}
|
|
|
|
static int ftgpio010_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct ftgpio010_plat *plat = dev_get_plat(dev);
|
|
|
|
plat->regs = dev_read_addr_ptr(dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_gpio_ops ftgpio010_ops = {
|
|
.direction_input = ftgpio010_direction_input,
|
|
.direction_output = ftgpio010_direction_output,
|
|
.get_value = ftgpio010_get_value,
|
|
.set_value = ftgpio010_set_value,
|
|
.get_function = ftgpio010_get_function,
|
|
};
|
|
|
|
static const struct udevice_id ftgpio010_ids[] = {
|
|
{ .compatible = "faraday,ftgpio010" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(ftgpio010) = {
|
|
.name = "ftgpio010",
|
|
.id = UCLASS_GPIO,
|
|
.of_match = ftgpio010_ids,
|
|
.ops = &ftgpio010_ops,
|
|
.of_to_plat = ftgpio010_of_to_plat,
|
|
.plat_auto = sizeof(struct ftgpio010_plat),
|
|
.probe = ftgpio010_probe,
|
|
};
|