mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-11-04 02:11:25 +01:00
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2015 Linaro
|
|
* Peter Griffin <peter.griffin@linaro.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/io.h>
|
|
#include <errno.h>
|
|
#include <linux/bitops.h>
|
|
|
|
static int hi6220_gpio_direction_input(struct udevice *dev, unsigned int gpio)
|
|
{
|
|
struct gpio_bank *bank = dev_get_priv(dev);
|
|
u8 data;
|
|
|
|
data = readb(bank->base + HI6220_GPIO_DIR);
|
|
data &= ~(1 << gpio);
|
|
writeb(data, bank->base + HI6220_GPIO_DIR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hi6220_gpio_set_value(struct udevice *dev, unsigned gpio,
|
|
int value)
|
|
{
|
|
struct gpio_bank *bank = dev_get_priv(dev);
|
|
|
|
writeb(!!value << gpio, bank->base + (BIT(gpio + 2)));
|
|
return 0;
|
|
}
|
|
|
|
static int hi6220_gpio_direction_output(struct udevice *dev, unsigned gpio,
|
|
int value)
|
|
{
|
|
struct gpio_bank *bank = dev_get_priv(dev);
|
|
u8 data;
|
|
|
|
data = readb(bank->base + HI6220_GPIO_DIR);
|
|
data |= 1 << gpio;
|
|
writeb(data, bank->base + HI6220_GPIO_DIR);
|
|
|
|
hi6220_gpio_set_value(dev, gpio, value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hi6220_gpio_get_value(struct udevice *dev, unsigned gpio)
|
|
{
|
|
struct gpio_bank *bank = dev_get_priv(dev);
|
|
|
|
return !!readb(bank->base + (BIT(gpio + 2)));
|
|
}
|
|
|
|
static const struct dm_gpio_ops gpio_hi6220_ops = {
|
|
.direction_input = hi6220_gpio_direction_input,
|
|
.direction_output = hi6220_gpio_direction_output,
|
|
.get_value = hi6220_gpio_get_value,
|
|
.set_value = hi6220_gpio_set_value,
|
|
};
|
|
|
|
static int hi6220_gpio_probe(struct udevice *dev)
|
|
{
|
|
struct gpio_bank *bank = dev_get_priv(dev);
|
|
struct hikey_gpio_plat *plat = dev_get_plat(dev);
|
|
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
char name[18], *str;
|
|
|
|
sprintf(name, "GPIO%d_", plat->bank_index);
|
|
|
|
str = strdup(name);
|
|
if (!str)
|
|
return -ENOMEM;
|
|
|
|
uc_priv->bank_name = str;
|
|
uc_priv->gpio_count = HI6220_GPIO_PER_BANK;
|
|
|
|
bank->base = (u8 *)plat->base;
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_DRIVER(gpio_hi6220) = {
|
|
.name = "gpio_hi6220",
|
|
.id = UCLASS_GPIO,
|
|
.ops = &gpio_hi6220_ops,
|
|
.probe = hi6220_gpio_probe,
|
|
.priv_auto = sizeof(struct gpio_bank),
|
|
};
|