1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * SDK7786 FPGA USRGPIR Support.
 4 *
 5 * Copyright (C) 2010  Paul Mundt
 
 
 
 
 6 */
 7#include <linux/init.h>
 8#include <linux/interrupt.h>
 9#include <linux/gpio/driver.h>
10#include <linux/irq.h>
11#include <linux/kernel.h>
12#include <linux/spinlock.h>
13#include <linux/io.h>
14#include <mach/fpga.h>
15
16#define NR_FPGA_GPIOS	8
17
18static const char *usrgpir_gpio_names[NR_FPGA_GPIOS] = {
19	"in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7",
20};
21
22static int usrgpir_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
23{
24	/* always in */
25	return 0;
26}
27
28static int usrgpir_gpio_get(struct gpio_chip *chip, unsigned gpio)
29{
30	return !!(fpga_read_reg(USRGPIR) & (1 << gpio));
31}
32
33static struct gpio_chip usrgpir_gpio_chip = {
34	.label			= "sdk7786-fpga",
35	.names			= usrgpir_gpio_names,
36	.direction_input	= usrgpir_gpio_direction_input,
37	.get			= usrgpir_gpio_get,
38	.base			= -1, /* don't care */
39	.ngpio			= NR_FPGA_GPIOS,
40};
41
42static int __init usrgpir_gpio_setup(void)
43{
44	return gpiochip_add_data(&usrgpir_gpio_chip, NULL);
45}
46device_initcall(usrgpir_gpio_setup);

 
 1/*
 2 * SDK7786 FPGA USRGPIR Support.
 3 *
 4 * Copyright (C) 2010  Paul Mundt
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
10#include <linux/init.h>
11#include <linux/interrupt.h>
12#include <linux/gpio/driver.h>
13#include <linux/irq.h>
14#include <linux/kernel.h>
15#include <linux/spinlock.h>
16#include <linux/io.h>
17#include <mach/fpga.h>
18
19#define NR_FPGA_GPIOS	8
20
21static const char *usrgpir_gpio_names[NR_FPGA_GPIOS] = {
22	"in0", "in1", "in2", "in3", "in4", "in5", "in6", "in7",
23};
24
25static int usrgpir_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
26{
27	/* always in */
28	return 0;
29}
30
31static int usrgpir_gpio_get(struct gpio_chip *chip, unsigned gpio)
32{
33	return !!(fpga_read_reg(USRGPIR) & (1 << gpio));
34}
35
36static struct gpio_chip usrgpir_gpio_chip = {
37	.label			= "sdk7786-fpga",
38	.names			= usrgpir_gpio_names,
39	.direction_input	= usrgpir_gpio_direction_input,
40	.get			= usrgpir_gpio_get,
41	.base			= -1, /* don't care */
42	.ngpio			= NR_FPGA_GPIOS,
43};
44
45static int __init usrgpir_gpio_setup(void)
46{
47	return gpiochip_add_data(&usrgpir_gpio_chip, NULL);
48}
49device_initcall(usrgpir_gpio_setup);