[J-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>

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),
};
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>
	12
	13	static int hi6220_gpio_direction_input(struct udevice *dev, unsigned int gpio)
	14	{
	15	struct gpio_bank *bank = dev_get_priv(dev);
	16	u8 data;
	17
	18	data = readb(bank->base + HI6220_GPIO_DIR);
	19	data &= ~(1 << gpio);
	20	writeb(data, bank->base + HI6220_GPIO_DIR);
	21
	22	return 0;
	23	}
	24
	25	static int hi6220_gpio_set_value(struct udevice *dev, unsigned gpio,
	26	int value)
	27	{
	28	struct gpio_bank *bank = dev_get_priv(dev);
	29
	30	writeb(!!value << gpio, bank->base + (BIT(gpio + 2)));
	31	return 0;
	32	}
	33
	34	static int hi6220_gpio_direction_output(struct udevice *dev, unsigned gpio,
	35	int value)
	36	{
	37	struct gpio_bank *bank = dev_get_priv(dev);
	38	u8 data;
	39
	40	data = readb(bank->base + HI6220_GPIO_DIR);
	41	data \|= 1 << gpio;
	42	writeb(data, bank->base + HI6220_GPIO_DIR);
	43
	44	hi6220_gpio_set_value(dev, gpio, value);
	45
	46	return 0;
	47	}
	48
	49	static int hi6220_gpio_get_value(struct udevice *dev, unsigned gpio)
	50	{
	51	struct gpio_bank *bank = dev_get_priv(dev);
	52
	53	return !!readb(bank->base + (BIT(gpio + 2)));
	54	}
	55
	56
	57
	58	static const struct dm_gpio_ops gpio_hi6220_ops = {
	59	.direction_input = hi6220_gpio_direction_input,
	60	.direction_output = hi6220_gpio_direction_output,
	61	.get_value = hi6220_gpio_get_value,
	62	.set_value = hi6220_gpio_set_value,
	63	};
	64
	65	static int hi6220_gpio_probe(struct udevice *dev)
	66	{
	67	struct gpio_bank *bank = dev_get_priv(dev);
	68	struct hikey_gpio_platdata *plat = dev_get_platdata(dev);
69	struct gpio_dev_priv *uc_priv = dev->uclass_priv;
70	char name[18], *str;
71
72	sprintf(name, "GPIO%d_", plat->bank_index);
73
74	str = strdup(name);
75	if (!str)
76	return -ENOMEM;
77
78	uc_priv->bank_name = str;
79	uc_priv->gpio_count = HI6220_GPIO_PER_BANK;
80
81	bank->base = (u8 *)plat->base;
82
83	return 0;
84	}
85
86	U_BOOT_DRIVER(gpio_hi6220) = {
87	.name = "gpio_hi6220",
88	.id = UCLASS_GPIO,
89	.ops = &gpio_hi6220_ops,
90	.probe = hi6220_gpio_probe,
91	.priv_auto_alloc_size = sizeof(struct gpio_bank),
92	};
93
94