hi6220_gpio.c
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/*
* Copyright (C) 2015 Linaro
* Peter Griffin <peter.griffin@linaro.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <errno.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_platdata *plat = dev_get_platdata(dev);
struct gpio_dev_priv *uc_priv = dev->uclass_priv;
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_alloc_size = sizeof(struct gpio_bank),
};