19952f691SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2e9fe32bcSLaxman Dewangan /*
3e9fe32bcSLaxman Dewangan * GPIO driver for RICOH583 power management chip.
4e9fe32bcSLaxman Dewangan *
5e9fe32bcSLaxman Dewangan * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
6e9fe32bcSLaxman Dewangan * Author: Laxman dewangan <ldewangan@nvidia.com>
7e9fe32bcSLaxman Dewangan *
8e9fe32bcSLaxman Dewangan * Based on code
9e9fe32bcSLaxman Dewangan * Copyright (C) 2011 RICOH COMPANY,LTD
10e9fe32bcSLaxman Dewangan */
11e9fe32bcSLaxman Dewangan #include <linux/init.h>
12e9fe32bcSLaxman Dewangan #include <linux/kernel.h>
13e9fe32bcSLaxman Dewangan #include <linux/slab.h>
14e9fe32bcSLaxman Dewangan #include <linux/platform_device.h>
15e9fe32bcSLaxman Dewangan #include <linux/device.h>
1698aef8e7SLinus Walleij #include <linux/gpio/driver.h>
17e9fe32bcSLaxman Dewangan #include <linux/mfd/rc5t583.h>
18e9fe32bcSLaxman Dewangan
19e9fe32bcSLaxman Dewangan struct rc5t583_gpio {
20e9fe32bcSLaxman Dewangan struct gpio_chip gpio_chip;
21e9fe32bcSLaxman Dewangan struct rc5t583 *rc5t583;
22e9fe32bcSLaxman Dewangan };
23e9fe32bcSLaxman Dewangan
rc5t583_gpio_get(struct gpio_chip * gc,unsigned int offset)24e9fe32bcSLaxman Dewangan static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset)
25e9fe32bcSLaxman Dewangan {
26d660c68eSLinus Walleij struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
27e9fe32bcSLaxman Dewangan struct device *parent = rc5t583_gpio->rc5t583->dev;
28e9fe32bcSLaxman Dewangan uint8_t val = 0;
29e9fe32bcSLaxman Dewangan int ret;
30e9fe32bcSLaxman Dewangan
31e9fe32bcSLaxman Dewangan ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val);
32e9fe32bcSLaxman Dewangan if (ret < 0)
33e9fe32bcSLaxman Dewangan return ret;
34e9fe32bcSLaxman Dewangan
35e9fe32bcSLaxman Dewangan return !!(val & BIT(offset));
36e9fe32bcSLaxman Dewangan }
37e9fe32bcSLaxman Dewangan
rc5t583_gpio_set(struct gpio_chip * gc,unsigned int offset,int val)38e9fe32bcSLaxman Dewangan static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
39e9fe32bcSLaxman Dewangan {
40d660c68eSLinus Walleij struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
41e9fe32bcSLaxman Dewangan struct device *parent = rc5t583_gpio->rc5t583->dev;
42e9fe32bcSLaxman Dewangan if (val)
43e9fe32bcSLaxman Dewangan rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
44e9fe32bcSLaxman Dewangan else
45e9fe32bcSLaxman Dewangan rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
46e9fe32bcSLaxman Dewangan }
47e9fe32bcSLaxman Dewangan
rc5t583_gpio_dir_input(struct gpio_chip * gc,unsigned int offset)48e9fe32bcSLaxman Dewangan static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
49e9fe32bcSLaxman Dewangan {
50d660c68eSLinus Walleij struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
51e9fe32bcSLaxman Dewangan struct device *parent = rc5t583_gpio->rc5t583->dev;
52e9fe32bcSLaxman Dewangan int ret;
53e9fe32bcSLaxman Dewangan
54e9fe32bcSLaxman Dewangan ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
55e9fe32bcSLaxman Dewangan if (ret < 0)
56e9fe32bcSLaxman Dewangan return ret;
57e9fe32bcSLaxman Dewangan
58e9fe32bcSLaxman Dewangan /* Set pin to gpio mode */
59e9fe32bcSLaxman Dewangan return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
60e9fe32bcSLaxman Dewangan }
61e9fe32bcSLaxman Dewangan
rc5t583_gpio_dir_output(struct gpio_chip * gc,unsigned offset,int value)62e9fe32bcSLaxman Dewangan static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset,
63e9fe32bcSLaxman Dewangan int value)
64e9fe32bcSLaxman Dewangan {
65d660c68eSLinus Walleij struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
66e9fe32bcSLaxman Dewangan struct device *parent = rc5t583_gpio->rc5t583->dev;
67e9fe32bcSLaxman Dewangan int ret;
68e9fe32bcSLaxman Dewangan
69e9fe32bcSLaxman Dewangan rc5t583_gpio_set(gc, offset, value);
70e9fe32bcSLaxman Dewangan ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
71e9fe32bcSLaxman Dewangan if (ret < 0)
72e9fe32bcSLaxman Dewangan return ret;
73e9fe32bcSLaxman Dewangan
74e9fe32bcSLaxman Dewangan /* Set pin to gpio mode */
75e9fe32bcSLaxman Dewangan return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
76e9fe32bcSLaxman Dewangan }
77e9fe32bcSLaxman Dewangan
rc5t583_gpio_to_irq(struct gpio_chip * gc,unsigned offset)78e9fe32bcSLaxman Dewangan static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
79e9fe32bcSLaxman Dewangan {
80d660c68eSLinus Walleij struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
81e9fe32bcSLaxman Dewangan
823bde4d26SAlexander Shiyan if (offset < RC5T583_MAX_GPIO)
83e9fe32bcSLaxman Dewangan return rc5t583_gpio->rc5t583->irq_base +
84e9fe32bcSLaxman Dewangan RC5T583_IRQ_GPIO0 + offset;
85e9fe32bcSLaxman Dewangan return -EINVAL;
86e9fe32bcSLaxman Dewangan }
87e9fe32bcSLaxman Dewangan
rc5t583_gpio_free(struct gpio_chip * gc,unsigned offset)88e9fe32bcSLaxman Dewangan static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset)
89e9fe32bcSLaxman Dewangan {
90d660c68eSLinus Walleij struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
91e9fe32bcSLaxman Dewangan struct device *parent = rc5t583_gpio->rc5t583->dev;
92e9fe32bcSLaxman Dewangan
93e9fe32bcSLaxman Dewangan rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
94e9fe32bcSLaxman Dewangan }
95e9fe32bcSLaxman Dewangan
rc5t583_gpio_probe(struct platform_device * pdev)963836309dSBill Pemberton static int rc5t583_gpio_probe(struct platform_device *pdev)
97e9fe32bcSLaxman Dewangan {
98e9fe32bcSLaxman Dewangan struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
99e9fe32bcSLaxman Dewangan struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
100e9fe32bcSLaxman Dewangan struct rc5t583_gpio *rc5t583_gpio;
101e9fe32bcSLaxman Dewangan
102e9fe32bcSLaxman Dewangan rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio),
103e9fe32bcSLaxman Dewangan GFP_KERNEL);
1044b7dfd7fSJingoo Han if (!rc5t583_gpio)
105e9fe32bcSLaxman Dewangan return -ENOMEM;
106e9fe32bcSLaxman Dewangan
107e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.label = "gpio-rc5t583",
108e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.owner = THIS_MODULE,
109e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free,
110e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input,
111e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output,
112e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set,
113e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get,
114e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq,
115e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO,
1169fb1f39eSLinus Walleij rc5t583_gpio->gpio_chip.can_sleep = true,
11758383c78SLinus Walleij rc5t583_gpio->gpio_chip.parent = &pdev->dev;
118e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.base = -1;
119e9fe32bcSLaxman Dewangan rc5t583_gpio->rc5t583 = rc5t583;
120e9fe32bcSLaxman Dewangan
121e9fe32bcSLaxman Dewangan if (pdata && pdata->gpio_base)
122e9fe32bcSLaxman Dewangan rc5t583_gpio->gpio_chip.base = pdata->gpio_base;
123e9fe32bcSLaxman Dewangan
124bc72f7f7SLaxman Dewangan return devm_gpiochip_add_data(&pdev->dev, &rc5t583_gpio->gpio_chip,
125bc72f7f7SLaxman Dewangan rc5t583_gpio);
126e9fe32bcSLaxman Dewangan }
127e9fe32bcSLaxman Dewangan
128e9fe32bcSLaxman Dewangan static struct platform_driver rc5t583_gpio_driver = {
129e9fe32bcSLaxman Dewangan .driver = {
130e9fe32bcSLaxman Dewangan .name = "rc5t583-gpio",
131e9fe32bcSLaxman Dewangan },
132e9fe32bcSLaxman Dewangan .probe = rc5t583_gpio_probe,
133e9fe32bcSLaxman Dewangan };
134e9fe32bcSLaxman Dewangan
rc5t583_gpio_init(void)135e9fe32bcSLaxman Dewangan static int __init rc5t583_gpio_init(void)
136e9fe32bcSLaxman Dewangan {
137e9fe32bcSLaxman Dewangan return platform_driver_register(&rc5t583_gpio_driver);
138e9fe32bcSLaxman Dewangan }
139e9fe32bcSLaxman Dewangan subsys_initcall(rc5t583_gpio_init);
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