2 * Copyright (C) 2012 Stefan Roese <sr@denx.de>
4 * SPDX-License-Identifier: GPL-2.0+
8 * Driver for SPEAr600 GPIO controller
12 #include <asm/arch/hardware.h>
17 static int gpio_direction(unsigned gpio,
18 enum gpio_direction direction)
20 struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
23 val = readl(®s->gpiodir);
25 if (direction == GPIO_DIRECTION_OUT)
30 writel(val, ®s->gpiodir);
35 int gpio_set_value(unsigned gpio, int value)
37 struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
40 writel(1 << gpio, ®s->gpiodata[DATA_REG_ADDR(gpio)]);
42 writel(0, ®s->gpiodata[DATA_REG_ADDR(gpio)]);
47 int gpio_get_value(unsigned gpio)
49 struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
52 val = readl(®s->gpiodata[DATA_REG_ADDR(gpio)]);
57 int gpio_request(unsigned gpio, const char *label)
59 if (gpio >= SPEAR_GPIO_COUNT)
65 int gpio_free(unsigned gpio)
70 void gpio_toggle_value(unsigned gpio)
72 gpio_set_value(gpio, !gpio_get_value(gpio));
75 int gpio_direction_input(unsigned gpio)
77 return gpio_direction(gpio, GPIO_DIRECTION_IN);
80 int gpio_direction_output(unsigned gpio, int value)
82 int ret = gpio_direction(gpio, GPIO_DIRECTION_OUT);
87 gpio_set_value(gpio, value);