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46 lines
1.1 KiB
46 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* SDK7786 FPGA USRGPIR Support. |
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* |
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* Copyright (C) 2010 Paul Mundt |
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*/ |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/gpio/driver.h> |
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#include <linux/irq.h> |
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#include <linux/kernel.h> |
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#include <linux/spinlock.h> |
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#include <linux/io.h> |
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#include <mach/fpga.h> |
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#define NR_FPGA_GPIOS 8 |
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static const char *usrgpir_gpio_names[NR_FPGA_GPIOS] = { |
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"in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7", |
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}; |
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static int usrgpir_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) |
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{ |
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/* always in */ |
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return 0; |
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} |
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static int usrgpir_gpio_get(struct gpio_chip *chip, unsigned gpio) |
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{ |
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return !!(fpga_read_reg(USRGPIR) & (1 << gpio)); |
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} |
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static struct gpio_chip usrgpir_gpio_chip = { |
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.label = "sdk7786-fpga", |
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.names = usrgpir_gpio_names, |
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.direction_input = usrgpir_gpio_direction_input, |
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.get = usrgpir_gpio_get, |
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.base = -1, /* don't care */ |
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.ngpio = NR_FPGA_GPIOS, |
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}; |
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static int __init usrgpir_gpio_setup(void) |
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{ |
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return gpiochip_add_data(&usrgpir_gpio_chip, NULL); |
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} |
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device_initcall(usrgpir_gpio_setup);
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