gpio-tps65912.c (fcdcc79628a1919bde9acf239e364f65bab6327c) gpio-tps65912.c (ca801a22f465eae39fadc770e15b5b7e82595f81)
1/*
1/*
2 * Copyright 2011 Texas Instruments Inc.
2 * GPIO driver for TI TPS65912x PMICs
3 *
3 *
4 * Author: Margarita Olaya <magi@slimlogic.co.uk>
4 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
5 * Andrew F. Davis <afd@ti.com>
5 *
6 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
10 *
11 * This driver is based on wm8350 implementation.
11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12 * kind, whether expressed or implied; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License version 2 for more details.
15 *
16 * Based on the Arizona GPIO driver and the previous TPS65912 driver by
17 * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
12 */
13
18 */
19
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/errno.h>
17#include <linux/gpio.h>
20#include <linux/gpio.h>
18#include <linux/mfd/core.h>
21#include <linux/module.h>
19#include <linux/platform_device.h>
22#include <linux/platform_device.h>
20#include <linux/seq_file.h>
21#include <linux/slab.h>
23
22#include <linux/mfd/tps65912.h>
23
24#include <linux/mfd/tps65912.h>
25
24struct tps65912_gpio_data {
25 struct tps65912 *tps65912;
26struct tps65912_gpio {
26 struct gpio_chip gpio_chip;
27 struct gpio_chip gpio_chip;
28 struct tps65912 *tps;
27};
28
29};
30
29static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
31static int tps65912_gpio_get_direction(struct gpio_chip *gc,
32 unsigned offset)
30{
33{
31 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
32 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
33 int val;
34 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
34
35
35 val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
36 int ret, val;
36
37
37 if (val & GPIO_STS_MASK)
38 return 1;
38 ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
39 if (ret)
40 return ret;
39
41
40 return 0;
42 if (val & GPIO_CFG_MASK)
43 return GPIOF_DIR_OUT;
44 else
45 return GPIOF_DIR_IN;
41}
42
46}
47
43static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
44 int value)
48static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
45{
49{
46 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
47 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
50 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
48
51
49 if (value)
50 tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
51 GPIO_SET_MASK);
52 else
53 tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
54 GPIO_SET_MASK);
52 return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
53 GPIO_CFG_MASK, 0);
55}
56
54}
55
57static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
58 int value)
56static int tps65912_gpio_direction_output(struct gpio_chip *gc,
57 unsigned offset, int value)
59{
58{
60 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
61 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
59 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
62
63 /* Set the initial value */
60
61 /* Set the initial value */
64 tps65912_gpio_set(gc, offset, value);
62 regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
63 GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
65
64
66 return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
67 GPIO_CFG_MASK);
65 return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
66 GPIO_CFG_MASK, GPIO_CFG_MASK);
68}
69
67}
68
70static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
69static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
71{
70{
72 struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
73 struct tps65912 *tps65912 = tps65912_gpio->tps65912;
71 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
72 int ret, val;
74
73
75 return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
76 GPIO_CFG_MASK);
74 ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
75 if (ret)
76 return ret;
77
78 if (val & GPIO_STS_MASK)
79 return 1;
80
81 return 0;
77}
78
82}
83
84static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
85 int value)
86{
87 struct tps65912_gpio *gpio = gpiochip_get_data(gc);
88
89 regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
90 GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
91}
92
79static struct gpio_chip template_chip = {
93static struct gpio_chip template_chip = {
80 .label = "tps65912",
94 .label = "tps65912-gpio",
81 .owner = THIS_MODULE,
95 .owner = THIS_MODULE,
82 .direction_input = tps65912_gpio_input,
83 .direction_output = tps65912_gpio_output,
96 .get_direction = tps65912_gpio_get_direction,
97 .direction_input = tps65912_gpio_direction_input,
98 .direction_output = tps65912_gpio_direction_output,
84 .get = tps65912_gpio_get,
85 .set = tps65912_gpio_set,
99 .get = tps65912_gpio_get,
100 .set = tps65912_gpio_set,
86 .can_sleep = true,
87 .ngpio = 5,
88 .base = -1,
101 .base = -1,
102 .ngpio = 5,
103 .can_sleep = true,
89};
90
91static int tps65912_gpio_probe(struct platform_device *pdev)
92{
104};
105
106static int tps65912_gpio_probe(struct platform_device *pdev)
107{
93 struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
94 struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
95 struct tps65912_gpio_data *tps65912_gpio;
108 struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
109 struct tps65912_gpio *gpio;
96 int ret;
97
110 int ret;
111
98 tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
99 GFP_KERNEL);
100 if (tps65912_gpio == NULL)
112 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
113 if (!gpio)
101 return -ENOMEM;
102
114 return -ENOMEM;
115
103 tps65912_gpio->tps65912 = tps65912;
104 tps65912_gpio->gpio_chip = template_chip;
105 tps65912_gpio->gpio_chip.parent = &pdev->dev;
106 if (pdata && pdata->gpio_base)
107 tps65912_gpio->gpio_chip.base = pdata->gpio_base;
116 gpio->tps = dev_get_drvdata(pdev->dev.parent);
117 gpio->gpio_chip = template_chip;
118 gpio->gpio_chip.parent = tps->dev;
108
119
109 ret = gpiochip_add_data(&tps65912_gpio->gpio_chip, tps65912_gpio);
120 ret = gpiochip_add_data(&gpio->gpio_chip, gpio);
110 if (ret < 0) {
121 if (ret < 0) {
111 dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
122 dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
112 return ret;
113 }
114
123 return ret;
124 }
125
115 platform_set_drvdata(pdev, tps65912_gpio);
126 platform_set_drvdata(pdev, gpio);
116
127
117 return ret;
128 return 0;
118}
119
120static int tps65912_gpio_remove(struct platform_device *pdev)
121{
129}
130
131static int tps65912_gpio_remove(struct platform_device *pdev)
132{
122 struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
133 struct tps65912_gpio *gpio = platform_get_drvdata(pdev);
123
134
124 gpiochip_remove(&tps65912_gpio->gpio_chip);
135 gpiochip_remove(&gpio->gpio_chip);
136
125 return 0;
126}
127
137 return 0;
138}
139
140static const struct platform_device_id tps65912_gpio_id_table[] = {
141 { "tps65912-gpio", },
142 { /* sentinel */ }
143};
144MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);
145
128static struct platform_driver tps65912_gpio_driver = {
129 .driver = {
130 .name = "tps65912-gpio",
131 },
132 .probe = tps65912_gpio_probe,
133 .remove = tps65912_gpio_remove,
146static struct platform_driver tps65912_gpio_driver = {
147 .driver = {
148 .name = "tps65912-gpio",
149 },
150 .probe = tps65912_gpio_probe,
151 .remove = tps65912_gpio_remove,
152 .id_table = tps65912_gpio_id_table,
134};
153};
154module_platform_driver(tps65912_gpio_driver);
135
155
136static int __init tps65912_gpio_init(void)
137{
138 return platform_driver_register(&tps65912_gpio_driver);
139}
140subsys_initcall(tps65912_gpio_init);
141
142static void __exit tps65912_gpio_exit(void)
143{
144 platform_driver_unregister(&tps65912_gpio_driver);
145}
146module_exit(tps65912_gpio_exit);
147
148MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
149MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
156MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
157MODULE_DESCRIPTION("TPS65912 GPIO driver");
150MODULE_LICENSE("GPL v2");
158MODULE_LICENSE("GPL v2");
151MODULE_ALIAS("platform:tps65912-gpio");