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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * TI Palma series PMIC's GPIO driver.
4 *
5 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
6 *
7 * Author: Laxman Dewangan <ldewangan@nvidia.com>
8 */
9
10#include <linux/gpio/driver.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/mfd/palmas.h>
14#include <linux/of.h>
15#include <linux/platform_device.h>
16
17struct palmas_gpio {
18 struct gpio_chip gpio_chip;
19 struct palmas *palmas;
20};
21
22struct palmas_device_data {
23 int ngpio;
24};
25
26static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset)
27{
28 struct palmas_gpio *pg = gpiochip_get_data(gc);
29 struct palmas *palmas = pg->palmas;
30 unsigned int val;
31 int ret;
32 unsigned int reg;
33 int gpio16 = (offset/8);
34
35 offset %= 8;
36 reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
37
38 ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
39 if (ret < 0) {
40 dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
41 return ret;
42 }
43
44 if (val & BIT(offset))
45 reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT;
46 else
47 reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN;
48
49 ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
50 if (ret < 0) {
51 dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
52 return ret;
53 }
54 return !!(val & BIT(offset));
55}
56
57static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset,
58 int value)
59{
60 struct palmas_gpio *pg = gpiochip_get_data(gc);
61 struct palmas *palmas = pg->palmas;
62 int ret;
63 unsigned int reg;
64 int gpio16 = (offset/8);
65
66 offset %= 8;
67 if (gpio16)
68 reg = (value) ?
69 PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2;
70 else
71 reg = (value) ?
72 PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT;
73
74 ret = palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset));
75 if (ret < 0)
76 dev_err(gc->parent, "Reg 0x%02x write failed, %d\n", reg, ret);
77}
78
79static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset,
80 int value)
81{
82 struct palmas_gpio *pg = gpiochip_get_data(gc);
83 struct palmas *palmas = pg->palmas;
84 int ret;
85 unsigned int reg;
86 int gpio16 = (offset/8);
87
88 offset %= 8;
89 reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
90
91 /* Set the initial value */
92 palmas_gpio_set(gc, offset, value);
93
94 ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg,
95 BIT(offset), BIT(offset));
96 if (ret < 0)
97 dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
98 ret);
99 return ret;
100}
101
102static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset)
103{
104 struct palmas_gpio *pg = gpiochip_get_data(gc);
105 struct palmas *palmas = pg->palmas;
106 int ret;
107 unsigned int reg;
108 int gpio16 = (offset/8);
109
110 offset %= 8;
111 reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
112
113 ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0);
114 if (ret < 0)
115 dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
116 ret);
117 return ret;
118}
119
120static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
121{
122 struct palmas_gpio *pg = gpiochip_get_data(gc);
123 struct palmas *palmas = pg->palmas;
124
125 return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset);
126}
127
128static const struct palmas_device_data palmas_dev_data = {
129 .ngpio = 8,
130};
131
132static const struct palmas_device_data tps80036_dev_data = {
133 .ngpio = 16,
134};
135
136static const struct of_device_id of_palmas_gpio_match[] = {
137 { .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,},
138 { .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,},
139 { .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,},
140 { .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,},
141 { },
142};
143
144static int palmas_gpio_probe(struct platform_device *pdev)
145{
146 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
147 struct palmas_platform_data *palmas_pdata;
148 struct palmas_gpio *palmas_gpio;
149 int ret;
150 const struct palmas_device_data *dev_data;
151
152 dev_data = of_device_get_match_data(&pdev->dev);
153 if (!dev_data)
154 dev_data = &palmas_dev_data;
155
156 palmas_gpio = devm_kzalloc(&pdev->dev,
157 sizeof(*palmas_gpio), GFP_KERNEL);
158 if (!palmas_gpio)
159 return -ENOMEM;
160
161 palmas_gpio->palmas = palmas;
162 palmas_gpio->gpio_chip.owner = THIS_MODULE;
163 palmas_gpio->gpio_chip.label = dev_name(&pdev->dev);
164 palmas_gpio->gpio_chip.ngpio = dev_data->ngpio;
165 palmas_gpio->gpio_chip.can_sleep = true;
166 palmas_gpio->gpio_chip.direction_input = palmas_gpio_input;
167 palmas_gpio->gpio_chip.direction_output = palmas_gpio_output;
168 palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq;
169 palmas_gpio->gpio_chip.set = palmas_gpio_set;
170 palmas_gpio->gpio_chip.get = palmas_gpio_get;
171 palmas_gpio->gpio_chip.parent = &pdev->dev;
172
173 palmas_pdata = dev_get_platdata(palmas->dev);
174 if (palmas_pdata && palmas_pdata->gpio_base)
175 palmas_gpio->gpio_chip.base = palmas_pdata->gpio_base;
176 else
177 palmas_gpio->gpio_chip.base = -1;
178
179 ret = devm_gpiochip_add_data(&pdev->dev, &palmas_gpio->gpio_chip,
180 palmas_gpio);
181 if (ret < 0) {
182 dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
183 return ret;
184 }
185
186 return ret;
187}
188
189static struct platform_driver palmas_gpio_driver = {
190 .driver.name = "palmas-gpio",
191 .driver.of_match_table = of_palmas_gpio_match,
192 .probe = palmas_gpio_probe,
193};
194
195static int __init palmas_gpio_init(void)
196{
197 return platform_driver_register(&palmas_gpio_driver);
198}
199subsys_initcall(palmas_gpio_init);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * TI Palma series PMIC's GPIO driver.
4 *
5 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
6 *
7 * Author: Laxman Dewangan <ldewangan@nvidia.com>
8 */
9
10#include <linux/gpio/driver.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/mfd/palmas.h>
14#include <linux/of.h>
15#include <linux/of_device.h>
16#include <linux/platform_device.h>
17
18struct palmas_gpio {
19 struct gpio_chip gpio_chip;
20 struct palmas *palmas;
21};
22
23struct palmas_device_data {
24 int ngpio;
25};
26
27static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset)
28{
29 struct palmas_gpio *pg = gpiochip_get_data(gc);
30 struct palmas *palmas = pg->palmas;
31 unsigned int val;
32 int ret;
33 unsigned int reg;
34 int gpio16 = (offset/8);
35
36 offset %= 8;
37 reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
38
39 ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
40 if (ret < 0) {
41 dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
42 return ret;
43 }
44
45 if (val & BIT(offset))
46 reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT;
47 else
48 reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN;
49
50 ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
51 if (ret < 0) {
52 dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
53 return ret;
54 }
55 return !!(val & BIT(offset));
56}
57
58static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset,
59 int value)
60{
61 struct palmas_gpio *pg = gpiochip_get_data(gc);
62 struct palmas *palmas = pg->palmas;
63 int ret;
64 unsigned int reg;
65 int gpio16 = (offset/8);
66
67 offset %= 8;
68 if (gpio16)
69 reg = (value) ?
70 PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2;
71 else
72 reg = (value) ?
73 PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT;
74
75 ret = palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset));
76 if (ret < 0)
77 dev_err(gc->parent, "Reg 0x%02x write failed, %d\n", reg, ret);
78}
79
80static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset,
81 int value)
82{
83 struct palmas_gpio *pg = gpiochip_get_data(gc);
84 struct palmas *palmas = pg->palmas;
85 int ret;
86 unsigned int reg;
87 int gpio16 = (offset/8);
88
89 offset %= 8;
90 reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
91
92 /* Set the initial value */
93 palmas_gpio_set(gc, offset, value);
94
95 ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg,
96 BIT(offset), BIT(offset));
97 if (ret < 0)
98 dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
99 ret);
100 return ret;
101}
102
103static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset)
104{
105 struct palmas_gpio *pg = gpiochip_get_data(gc);
106 struct palmas *palmas = pg->palmas;
107 int ret;
108 unsigned int reg;
109 int gpio16 = (offset/8);
110
111 offset %= 8;
112 reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
113
114 ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0);
115 if (ret < 0)
116 dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
117 ret);
118 return ret;
119}
120
121static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
122{
123 struct palmas_gpio *pg = gpiochip_get_data(gc);
124 struct palmas *palmas = pg->palmas;
125
126 return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset);
127}
128
129static const struct palmas_device_data palmas_dev_data = {
130 .ngpio = 8,
131};
132
133static const struct palmas_device_data tps80036_dev_data = {
134 .ngpio = 16,
135};
136
137static const struct of_device_id of_palmas_gpio_match[] = {
138 { .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,},
139 { .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,},
140 { .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,},
141 { .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,},
142 { },
143};
144
145static int palmas_gpio_probe(struct platform_device *pdev)
146{
147 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
148 struct palmas_platform_data *palmas_pdata;
149 struct palmas_gpio *palmas_gpio;
150 int ret;
151 const struct palmas_device_data *dev_data;
152
153 dev_data = of_device_get_match_data(&pdev->dev);
154 if (!dev_data)
155 dev_data = &palmas_dev_data;
156
157 palmas_gpio = devm_kzalloc(&pdev->dev,
158 sizeof(*palmas_gpio), GFP_KERNEL);
159 if (!palmas_gpio)
160 return -ENOMEM;
161
162 palmas_gpio->palmas = palmas;
163 palmas_gpio->gpio_chip.owner = THIS_MODULE;
164 palmas_gpio->gpio_chip.label = dev_name(&pdev->dev);
165 palmas_gpio->gpio_chip.ngpio = dev_data->ngpio;
166 palmas_gpio->gpio_chip.can_sleep = true;
167 palmas_gpio->gpio_chip.direction_input = palmas_gpio_input;
168 palmas_gpio->gpio_chip.direction_output = palmas_gpio_output;
169 palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq;
170 palmas_gpio->gpio_chip.set = palmas_gpio_set;
171 palmas_gpio->gpio_chip.get = palmas_gpio_get;
172 palmas_gpio->gpio_chip.parent = &pdev->dev;
173#ifdef CONFIG_OF_GPIO
174 palmas_gpio->gpio_chip.of_node = pdev->dev.of_node;
175#endif
176 palmas_pdata = dev_get_platdata(palmas->dev);
177 if (palmas_pdata && palmas_pdata->gpio_base)
178 palmas_gpio->gpio_chip.base = palmas_pdata->gpio_base;
179 else
180 palmas_gpio->gpio_chip.base = -1;
181
182 ret = devm_gpiochip_add_data(&pdev->dev, &palmas_gpio->gpio_chip,
183 palmas_gpio);
184 if (ret < 0) {
185 dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
186 return ret;
187 }
188
189 platform_set_drvdata(pdev, palmas_gpio);
190 return ret;
191}
192
193static struct platform_driver palmas_gpio_driver = {
194 .driver.name = "palmas-gpio",
195 .driver.of_match_table = of_palmas_gpio_match,
196 .probe = palmas_gpio_probe,
197};
198
199static int __init palmas_gpio_init(void)
200{
201 return platform_driver_register(&palmas_gpio_driver);
202}
203subsys_initcall(palmas_gpio_init);