1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Philips UCB1400 GPIO driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Author: Marek Vasut <marek.vasut@gmail.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/ucb1400.h>
10*4882a593Smuzhiyun
ucb1400_gpio_dir_in(struct gpio_chip * gc,unsigned off)11*4882a593Smuzhiyun static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun struct ucb1400_gpio *gpio;
14*4882a593Smuzhiyun gpio = gpiochip_get_data(gc);
15*4882a593Smuzhiyun ucb1400_gpio_set_direction(gpio->ac97, off, 0);
16*4882a593Smuzhiyun return 0;
17*4882a593Smuzhiyun }
18*4882a593Smuzhiyun
ucb1400_gpio_dir_out(struct gpio_chip * gc,unsigned off,int val)19*4882a593Smuzhiyun static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct ucb1400_gpio *gpio;
22*4882a593Smuzhiyun gpio = gpiochip_get_data(gc);
23*4882a593Smuzhiyun ucb1400_gpio_set_direction(gpio->ac97, off, 1);
24*4882a593Smuzhiyun ucb1400_gpio_set_value(gpio->ac97, off, val);
25*4882a593Smuzhiyun return 0;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
ucb1400_gpio_get(struct gpio_chip * gc,unsigned off)28*4882a593Smuzhiyun static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun struct ucb1400_gpio *gpio;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun gpio = gpiochip_get_data(gc);
33*4882a593Smuzhiyun return !!ucb1400_gpio_get_value(gpio->ac97, off);
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
ucb1400_gpio_set(struct gpio_chip * gc,unsigned off,int val)36*4882a593Smuzhiyun static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct ucb1400_gpio *gpio;
39*4882a593Smuzhiyun gpio = gpiochip_get_data(gc);
40*4882a593Smuzhiyun ucb1400_gpio_set_value(gpio->ac97, off, val);
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
ucb1400_gpio_probe(struct platform_device * dev)43*4882a593Smuzhiyun static int ucb1400_gpio_probe(struct platform_device *dev)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
46*4882a593Smuzhiyun int err = 0;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (!(ucb && ucb->gpio_offset)) {
49*4882a593Smuzhiyun err = -EINVAL;
50*4882a593Smuzhiyun goto err;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun platform_set_drvdata(dev, ucb);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun ucb->gc.label = "ucb1400_gpio";
56*4882a593Smuzhiyun ucb->gc.base = ucb->gpio_offset;
57*4882a593Smuzhiyun ucb->gc.ngpio = 10;
58*4882a593Smuzhiyun ucb->gc.owner = THIS_MODULE;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun ucb->gc.direction_input = ucb1400_gpio_dir_in;
61*4882a593Smuzhiyun ucb->gc.direction_output = ucb1400_gpio_dir_out;
62*4882a593Smuzhiyun ucb->gc.get = ucb1400_gpio_get;
63*4882a593Smuzhiyun ucb->gc.set = ucb1400_gpio_set;
64*4882a593Smuzhiyun ucb->gc.can_sleep = true;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
67*4882a593Smuzhiyun if (err)
68*4882a593Smuzhiyun goto err;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun if (ucb->gpio_setup)
71*4882a593Smuzhiyun err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun err:
74*4882a593Smuzhiyun return err;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
ucb1400_gpio_remove(struct platform_device * dev)78*4882a593Smuzhiyun static int ucb1400_gpio_remove(struct platform_device *dev)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun int err = 0;
81*4882a593Smuzhiyun struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun if (ucb && ucb->gpio_teardown) {
84*4882a593Smuzhiyun err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
85*4882a593Smuzhiyun if (err)
86*4882a593Smuzhiyun return err;
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun return err;
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun static struct platform_driver ucb1400_gpio_driver = {
93*4882a593Smuzhiyun .probe = ucb1400_gpio_probe,
94*4882a593Smuzhiyun .remove = ucb1400_gpio_remove,
95*4882a593Smuzhiyun .driver = {
96*4882a593Smuzhiyun .name = "ucb1400_gpio"
97*4882a593Smuzhiyun },
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun module_platform_driver(ucb1400_gpio_driver);
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
103*4882a593Smuzhiyun MODULE_LICENSE("GPL");
104*4882a593Smuzhiyun MODULE_ALIAS("platform:ucb1400_gpio");
105