[u-boot.git] / drivers / gpio / hi6220_gpio.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2015 Linaro
 * Peter Griffin <[email protected]>
 */

#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->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	= sizeof(struct gpio_bank),
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
152f4898 PG	2	/*
	3	* Copyright (C) 2015 Linaro
	4	* Peter Griffin <[email protected]>
152f4898 PG	5	*/
	6
	7	#include <common.h>
	8	#include <dm.h>
	9	#include <asm/gpio.h>
	10	#include <asm/io.h>
	11	#include <errno.h>
cd93d625	12	#include <linux/bitops.h>
152f4898 PG	13
	14	static int hi6220_gpio_direction_input(struct udevice *dev, unsigned int gpio)
	15	{
	16	struct gpio_bank *bank = dev_get_priv(dev);
	17	u8 data;
	18
	19	data = readb(bank->base + HI6220_GPIO_DIR);
	20	data &= ~(1 << gpio);
	21	writeb(data, bank->base + HI6220_GPIO_DIR);
	22
	23	return 0;
	24	}
	25
	26	static int hi6220_gpio_set_value(struct udevice *dev, unsigned gpio,
	27	int value)
	28	{
	29	struct gpio_bank *bank = dev_get_priv(dev);
	30
	31	writeb(!!value << gpio, bank->base + (BIT(gpio + 2)));
	32	return 0;
	33	}
	34
	35	static int hi6220_gpio_direction_output(struct udevice *dev, unsigned gpio,
	36	int value)
	37	{
	38	struct gpio_bank *bank = dev_get_priv(dev);
	39	u8 data;
	40
	41	data = readb(bank->base + HI6220_GPIO_DIR);
	42	data \|= 1 << gpio;
	43	writeb(data, bank->base + HI6220_GPIO_DIR);
	44
	45	hi6220_gpio_set_value(dev, gpio, value);
	46
	47	return 0;
	48	}
	49
	50	static int hi6220_gpio_get_value(struct udevice *dev, unsigned gpio)
	51	{
	52	struct gpio_bank *bank = dev_get_priv(dev);
	53
	54	return !!readb(bank->base + (BIT(gpio + 2)));
	55	}
	56
	57
	58
	59	static const struct dm_gpio_ops gpio_hi6220_ops = {
	60	.direction_input = hi6220_gpio_direction_input,
	61	.direction_output = hi6220_gpio_direction_output,
	62	.get_value = hi6220_gpio_get_value,
	63	.set_value = hi6220_gpio_set_value,
	64	};
	65
	66	static int hi6220_gpio_probe(struct udevice *dev)
	67	{
	68	struct gpio_bank *bank = dev_get_priv(dev);
8a8d24bd	69	struct hikey_gpio_plat *plat = dev_get_plat(dev);
152f4898 PG	70	struct gpio_dev_priv *uc_priv = dev->uclass_priv;
	71	char name[18], *str;
	72
	73	sprintf(name, "GPIO%d_", plat->bank_index);
	74
	75	str = strdup(name);
	76	if (!str)
	77	return -ENOMEM;
	78
	79	uc_priv->bank_name = str;
	80	uc_priv->gpio_count = HI6220_GPIO_PER_BANK;
	81
	82	bank->base = (u8 *)plat->base;
	83
	84	return 0;
	85	}
	86
	87	U_BOOT_DRIVER(gpio_hi6220) = {
	88	.name = "gpio_hi6220",
	89	.id = UCLASS_GPIO,
	90	.ops = &gpio_hi6220_ops,
	91	.probe = hi6220_gpio_probe,
41575d8e	92	.priv_auto = sizeof(struct gpio_bank),
152f4898 PG	93	};
	94
	95