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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * GPIO Driver for Dialog DA9052 PMICs.
4 *
5 * Copyright(c) 2011 Dialog Semiconductor Ltd.
6 *
7 * Author: David Dajun Chen <dchen@diasemi.com>
8 */
9#include <linux/fs.h>
10#include <linux/gpio/driver.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/syscalls.h>
14#include <linux/uaccess.h>
15
16#include <linux/mfd/da9052/da9052.h>
17#include <linux/mfd/da9052/pdata.h>
18#include <linux/mfd/da9052/reg.h>
19
20#define DA9052_INPUT 1
21#define DA9052_OUTPUT_OPENDRAIN 2
22#define DA9052_OUTPUT_PUSHPULL 3
23
24#define DA9052_SUPPLY_VDD_IO1 0
25
26#define DA9052_DEBOUNCING_OFF 0
27#define DA9052_DEBOUNCING_ON 1
28
29#define DA9052_OUTPUT_LOWLEVEL 0
30
31#define DA9052_ACTIVE_LOW 0
32#define DA9052_ACTIVE_HIGH 1
33
34#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8
35#define DA9052_GPIO_SHIFT_COUNT(no) (no%8)
36#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0
37#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F
38#define DA9052_GPIO_NIBBLE_SHIFT 4
39#define DA9052_IRQ_GPI0 16
40#define DA9052_GPIO_ODD_SHIFT 7
41#define DA9052_GPIO_EVEN_SHIFT 3
42
43struct da9052_gpio {
44 struct da9052 *da9052;
45 struct gpio_chip gp;
46};
47
48static unsigned char da9052_gpio_port_odd(unsigned offset)
49{
50 return offset % 2;
51}
52
53static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset)
54{
55 struct da9052_gpio *gpio = gpiochip_get_data(gc);
56 int da9052_port_direction = 0;
57 int ret;
58
59 ret = da9052_reg_read(gpio->da9052,
60 DA9052_GPIO_0_1_REG + (offset >> 1));
61 if (ret < 0)
62 return ret;
63
64 if (da9052_gpio_port_odd(offset)) {
65 da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN;
66 da9052_port_direction >>= 4;
67 } else {
68 da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN;
69 }
70
71 switch (da9052_port_direction) {
72 case DA9052_INPUT:
73 if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER)
74 ret = da9052_reg_read(gpio->da9052,
75 DA9052_STATUS_C_REG);
76 else
77 ret = da9052_reg_read(gpio->da9052,
78 DA9052_STATUS_D_REG);
79 if (ret < 0)
80 return ret;
81 return !!(ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)));
82 case DA9052_OUTPUT_PUSHPULL:
83 if (da9052_gpio_port_odd(offset))
84 return !!(ret & DA9052_GPIO_ODD_PORT_MODE);
85 else
86 return !!(ret & DA9052_GPIO_EVEN_PORT_MODE);
87 default:
88 return -EINVAL;
89 }
90}
91
92static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
93{
94 struct da9052_gpio *gpio = gpiochip_get_data(gc);
95 int ret;
96
97 if (da9052_gpio_port_odd(offset)) {
98 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
99 DA9052_GPIO_0_1_REG,
100 DA9052_GPIO_ODD_PORT_MODE,
101 value << DA9052_GPIO_ODD_SHIFT);
102 if (ret != 0)
103 dev_err(gpio->da9052->dev,
104 "Failed to updated gpio odd reg,%d",
105 ret);
106 } else {
107 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
108 DA9052_GPIO_0_1_REG,
109 DA9052_GPIO_EVEN_PORT_MODE,
110 value << DA9052_GPIO_EVEN_SHIFT);
111 if (ret != 0)
112 dev_err(gpio->da9052->dev,
113 "Failed to updated gpio even reg,%d",
114 ret);
115 }
116}
117
118static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
119{
120 struct da9052_gpio *gpio = gpiochip_get_data(gc);
121 unsigned char register_value;
122 int ret;
123
124 /* Format: function - 2 bits type - 1 bit mode - 1 bit */
125 register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 |
126 DA9052_DEBOUNCING_ON << 3;
127
128 if (da9052_gpio_port_odd(offset))
129 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
130 DA9052_GPIO_0_1_REG,
131 DA9052_GPIO_MASK_UPPER_NIBBLE,
132 (register_value <<
133 DA9052_GPIO_NIBBLE_SHIFT));
134 else
135 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
136 DA9052_GPIO_0_1_REG,
137 DA9052_GPIO_MASK_LOWER_NIBBLE,
138 register_value);
139
140 return ret;
141}
142
143static int da9052_gpio_direction_output(struct gpio_chip *gc,
144 unsigned offset, int value)
145{
146 struct da9052_gpio *gpio = gpiochip_get_data(gc);
147 unsigned char register_value;
148 int ret;
149
150 /* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */
151 register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 |
152 value << 3;
153
154 if (da9052_gpio_port_odd(offset))
155 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
156 DA9052_GPIO_0_1_REG,
157 DA9052_GPIO_MASK_UPPER_NIBBLE,
158 (register_value <<
159 DA9052_GPIO_NIBBLE_SHIFT));
160 else
161 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
162 DA9052_GPIO_0_1_REG,
163 DA9052_GPIO_MASK_LOWER_NIBBLE,
164 register_value);
165
166 return ret;
167}
168
169static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset)
170{
171 struct da9052_gpio *gpio = gpiochip_get_data(gc);
172 struct da9052 *da9052 = gpio->da9052;
173
174 int irq;
175
176 irq = regmap_irq_get_virq(da9052->irq_data, DA9052_IRQ_GPI0 + offset);
177
178 return irq;
179}
180
181static const struct gpio_chip reference_gp = {
182 .label = "da9052-gpio",
183 .owner = THIS_MODULE,
184 .get = da9052_gpio_get,
185 .set = da9052_gpio_set,
186 .direction_input = da9052_gpio_direction_input,
187 .direction_output = da9052_gpio_direction_output,
188 .to_irq = da9052_gpio_to_irq,
189 .can_sleep = true,
190 .ngpio = 16,
191 .base = -1,
192};
193
194static int da9052_gpio_probe(struct platform_device *pdev)
195{
196 struct da9052_gpio *gpio;
197 struct da9052_pdata *pdata;
198
199 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
200 if (!gpio)
201 return -ENOMEM;
202
203 gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
204 pdata = dev_get_platdata(gpio->da9052->dev);
205
206 gpio->gp = reference_gp;
207 if (pdata && pdata->gpio_base)
208 gpio->gp.base = pdata->gpio_base;
209
210 return devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
211}
212
213static struct platform_driver da9052_gpio_driver = {
214 .probe = da9052_gpio_probe,
215 .driver = {
216 .name = "da9052-gpio",
217 },
218};
219
220module_platform_driver(da9052_gpio_driver);
221
222MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
223MODULE_DESCRIPTION("DA9052 GPIO Device Driver");
224MODULE_LICENSE("GPL");
225MODULE_ALIAS("platform:da9052-gpio");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * GPIO Driver for Dialog DA9052 PMICs.
4 *
5 * Copyright(c) 2011 Dialog Semiconductor Ltd.
6 *
7 * Author: David Dajun Chen <dchen@diasemi.com>
8 */
9#include <linux/fs.h>
10#include <linux/gpio/driver.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/syscalls.h>
14#include <linux/uaccess.h>
15
16#include <linux/mfd/da9052/da9052.h>
17#include <linux/mfd/da9052/pdata.h>
18#include <linux/mfd/da9052/reg.h>
19
20#define DA9052_INPUT 1
21#define DA9052_OUTPUT_OPENDRAIN 2
22#define DA9052_OUTPUT_PUSHPULL 3
23
24#define DA9052_SUPPLY_VDD_IO1 0
25
26#define DA9052_DEBOUNCING_OFF 0
27#define DA9052_DEBOUNCING_ON 1
28
29#define DA9052_OUTPUT_LOWLEVEL 0
30
31#define DA9052_ACTIVE_LOW 0
32#define DA9052_ACTIVE_HIGH 1
33
34#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8
35#define DA9052_GPIO_SHIFT_COUNT(no) (no%8)
36#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0
37#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F
38#define DA9052_GPIO_NIBBLE_SHIFT 4
39#define DA9052_IRQ_GPI0 16
40#define DA9052_GPIO_ODD_SHIFT 7
41#define DA9052_GPIO_EVEN_SHIFT 3
42
43struct da9052_gpio {
44 struct da9052 *da9052;
45 struct gpio_chip gp;
46};
47
48static unsigned char da9052_gpio_port_odd(unsigned offset)
49{
50 return offset % 2;
51}
52
53static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset)
54{
55 struct da9052_gpio *gpio = gpiochip_get_data(gc);
56 int da9052_port_direction = 0;
57 int ret;
58
59 ret = da9052_reg_read(gpio->da9052,
60 DA9052_GPIO_0_1_REG + (offset >> 1));
61 if (ret < 0)
62 return ret;
63
64 if (da9052_gpio_port_odd(offset)) {
65 da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN;
66 da9052_port_direction >>= 4;
67 } else {
68 da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN;
69 }
70
71 switch (da9052_port_direction) {
72 case DA9052_INPUT:
73 if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER)
74 ret = da9052_reg_read(gpio->da9052,
75 DA9052_STATUS_C_REG);
76 else
77 ret = da9052_reg_read(gpio->da9052,
78 DA9052_STATUS_D_REG);
79 if (ret < 0)
80 return ret;
81 return !!(ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)));
82 case DA9052_OUTPUT_PUSHPULL:
83 if (da9052_gpio_port_odd(offset))
84 return !!(ret & DA9052_GPIO_ODD_PORT_MODE);
85 else
86 return !!(ret & DA9052_GPIO_EVEN_PORT_MODE);
87 default:
88 return -EINVAL;
89 }
90}
91
92static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
93{
94 struct da9052_gpio *gpio = gpiochip_get_data(gc);
95 int ret;
96
97 if (da9052_gpio_port_odd(offset)) {
98 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
99 DA9052_GPIO_0_1_REG,
100 DA9052_GPIO_ODD_PORT_MODE,
101 value << DA9052_GPIO_ODD_SHIFT);
102 if (ret != 0)
103 dev_err(gpio->da9052->dev,
104 "Failed to updated gpio odd reg,%d",
105 ret);
106 } else {
107 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
108 DA9052_GPIO_0_1_REG,
109 DA9052_GPIO_EVEN_PORT_MODE,
110 value << DA9052_GPIO_EVEN_SHIFT);
111 if (ret != 0)
112 dev_err(gpio->da9052->dev,
113 "Failed to updated gpio even reg,%d",
114 ret);
115 }
116}
117
118static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
119{
120 struct da9052_gpio *gpio = gpiochip_get_data(gc);
121 unsigned char register_value;
122 int ret;
123
124 /* Format: function - 2 bits type - 1 bit mode - 1 bit */
125 register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 |
126 DA9052_DEBOUNCING_ON << 3;
127
128 if (da9052_gpio_port_odd(offset))
129 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
130 DA9052_GPIO_0_1_REG,
131 DA9052_GPIO_MASK_UPPER_NIBBLE,
132 (register_value <<
133 DA9052_GPIO_NIBBLE_SHIFT));
134 else
135 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
136 DA9052_GPIO_0_1_REG,
137 DA9052_GPIO_MASK_LOWER_NIBBLE,
138 register_value);
139
140 return ret;
141}
142
143static int da9052_gpio_direction_output(struct gpio_chip *gc,
144 unsigned offset, int value)
145{
146 struct da9052_gpio *gpio = gpiochip_get_data(gc);
147 unsigned char register_value;
148 int ret;
149
150 /* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */
151 register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 |
152 value << 3;
153
154 if (da9052_gpio_port_odd(offset))
155 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
156 DA9052_GPIO_0_1_REG,
157 DA9052_GPIO_MASK_UPPER_NIBBLE,
158 (register_value <<
159 DA9052_GPIO_NIBBLE_SHIFT));
160 else
161 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
162 DA9052_GPIO_0_1_REG,
163 DA9052_GPIO_MASK_LOWER_NIBBLE,
164 register_value);
165
166 return ret;
167}
168
169static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset)
170{
171 struct da9052_gpio *gpio = gpiochip_get_data(gc);
172 struct da9052 *da9052 = gpio->da9052;
173
174 int irq;
175
176 irq = regmap_irq_get_virq(da9052->irq_data, DA9052_IRQ_GPI0 + offset);
177
178 return irq;
179}
180
181static const struct gpio_chip reference_gp = {
182 .label = "da9052-gpio",
183 .owner = THIS_MODULE,
184 .get = da9052_gpio_get,
185 .set = da9052_gpio_set,
186 .direction_input = da9052_gpio_direction_input,
187 .direction_output = da9052_gpio_direction_output,
188 .to_irq = da9052_gpio_to_irq,
189 .can_sleep = true,
190 .ngpio = 16,
191 .base = -1,
192};
193
194static int da9052_gpio_probe(struct platform_device *pdev)
195{
196 struct da9052_gpio *gpio;
197 struct da9052_pdata *pdata;
198
199 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
200 if (!gpio)
201 return -ENOMEM;
202
203 gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
204 pdata = dev_get_platdata(gpio->da9052->dev);
205
206 gpio->gp = reference_gp;
207 if (pdata && pdata->gpio_base)
208 gpio->gp.base = pdata->gpio_base;
209
210 return devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
211}
212
213static struct platform_driver da9052_gpio_driver = {
214 .probe = da9052_gpio_probe,
215 .driver = {
216 .name = "da9052-gpio",
217 },
218};
219
220module_platform_driver(da9052_gpio_driver);
221
222MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
223MODULE_DESCRIPTION("DA9052 GPIO Device Driver");
224MODULE_LICENSE("GPL");
225MODULE_ALIAS("platform:da9052-gpio");