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-rw-r--r--drivers/gpio/Kconfig6
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-da9052.c278
3 files changed, 285 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 9f06e63fbc8e..a4ac78b6a0f8 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -68,6 +68,12 @@ config GPIO_GENERIC
68 68
69# put drivers in the right section, in alphabetical order 69# put drivers in the right section, in alphabetical order
70 70
71config GPIO_DA9052
72 tristate "Dialog DA9052 GPIO"
73 depends on PMIC_DA9052
74 help
75 Say yes here to enable the GPIO driver for the DA9052 chip.
76
71config GPIO_MAX730X 77config GPIO_MAX730X
72 tristate 78 tristate
73 79
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 0fbdd75996e3..b847fb5b847c 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
13obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o 13obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o
14obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o 14obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
15obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o 15obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
16obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o
16obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o 17obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
17obj-$(CONFIG_GPIO_EXYNOS4) += gpio-exynos4.o 18obj-$(CONFIG_GPIO_EXYNOS4) += gpio-exynos4.o
18obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o 19obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o
diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c
new file mode 100644
index 000000000000..c23761f42199
--- /dev/null
+++ b/drivers/gpio/gpio-da9052.c
@@ -0,0 +1,278 @@
1/*
2 * GPIO Driver for Dialog DA9052 PMICs.
3 *
4 * Copyright(c) 2011 Dialog Semiconductor Ltd.
5 *
6 * Author: David Dajun Chen <dchen@diasemi.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14#include <linux/module.h>
15#include <linux/fs.h>
16#include <linux/uaccess.h>
17#include <linux/platform_device.h>
18#include <linux/gpio.h>
19#include <linux/syscalls.h>
20#include <linux/seq_file.h>
21
22#include <linux/mfd/da9052/da9052.h>
23#include <linux/mfd/da9052/reg.h>
24#include <linux/mfd/da9052/pdata.h>
25#include <linux/mfd/da9052/gpio.h>
26
27#define DA9052_INPUT 1
28#define DA9052_OUTPUT_OPENDRAIN 2
29#define DA9052_OUTPUT_PUSHPULL 3
30
31#define DA9052_SUPPLY_VDD_IO1 0
32
33#define DA9052_DEBOUNCING_OFF 0
34#define DA9052_DEBOUNCING_ON 1
35
36#define DA9052_OUTPUT_LOWLEVEL 0
37
38#define DA9052_ACTIVE_LOW 0
39#define DA9052_ACTIVE_HIGH 1
40
41#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8
42#define DA9052_GPIO_SHIFT_COUNT(no) (no%8)
43#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0
44#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F
45#define DA9052_GPIO_NIBBLE_SHIFT 4
46
47struct da9052_gpio {
48 struct da9052 *da9052;
49 struct gpio_chip gp;
50};
51
52static inline struct da9052_gpio *to_da9052_gpio(struct gpio_chip *chip)
53{
54 return container_of(chip, struct da9052_gpio, gp);
55}
56
57static unsigned char da9052_gpio_port_odd(unsigned offset)
58{
59 return offset % 2;
60}
61
62static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset)
63{
64 struct da9052_gpio *gpio = to_da9052_gpio(gc);
65 int da9052_port_direction = 0;
66 int ret;
67
68 ret = da9052_reg_read(gpio->da9052,
69 DA9052_GPIO_0_1_REG + (offset >> 1));
70 if (ret < 0)
71 return ret;
72
73 if (da9052_gpio_port_odd(offset)) {
74 da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN;
75 da9052_port_direction >>= 4;
76 } else {
77 da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN;
78 }
79
80 switch (da9052_port_direction) {
81 case DA9052_INPUT:
82 if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER)
83 ret = da9052_reg_read(gpio->da9052,
84 DA9052_STATUS_C_REG);
85 else
86 ret = da9052_reg_read(gpio->da9052,
87 DA9052_STATUS_D_REG);
88 if (ret < 0)
89 return ret;
90 if (ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)))
91 return 1;
92 else
93 return 0;
94 case DA9052_OUTPUT_PUSHPULL:
95 if (da9052_gpio_port_odd(offset))
96 return ret & DA9052_GPIO_ODD_PORT_MODE;
97 else
98 return ret & DA9052_GPIO_EVEN_PORT_MODE;
99 default:
100 return -EINVAL;
101 }
102}
103
104static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
105{
106 struct da9052_gpio *gpio = to_da9052_gpio(gc);
107 unsigned char register_value = 0;
108 int ret;
109
110 if (da9052_gpio_port_odd(offset)) {
111 if (value) {
112 register_value = DA9052_GPIO_ODD_PORT_MODE;
113 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
114 DA9052_GPIO_0_1_REG,
115 DA9052_GPIO_ODD_PORT_MODE,
116 register_value);
117 if (ret != 0)
118 dev_err(gpio->da9052->dev,
119 "Failed to updated gpio odd reg,%d",
120 ret);
121 }
122 } else {
123 if (value) {
124 register_value = DA9052_GPIO_EVEN_PORT_MODE;
125 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
126 DA9052_GPIO_0_1_REG,
127 DA9052_GPIO_EVEN_PORT_MODE,
128 register_value);
129 if (ret != 0)
130 dev_err(gpio->da9052->dev,
131 "Failed to updated gpio even reg,%d",
132 ret);
133 }
134 }
135}
136
137static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
138{
139 struct da9052_gpio *gpio = to_da9052_gpio(gc);
140 unsigned char register_value;
141 int ret;
142
143 /* Format: function - 2 bits type - 1 bit mode - 1 bit */
144 register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 |
145 DA9052_DEBOUNCING_ON << 3;
146
147 if (da9052_gpio_port_odd(offset))
148 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
149 DA9052_GPIO_0_1_REG,
150 DA9052_GPIO_MASK_UPPER_NIBBLE,
151 (register_value <<
152 DA9052_GPIO_NIBBLE_SHIFT));
153 else
154 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
155 DA9052_GPIO_0_1_REG,
156 DA9052_GPIO_MASK_LOWER_NIBBLE,
157 register_value);
158
159 return ret;
160}
161
162static int da9052_gpio_direction_output(struct gpio_chip *gc,
163 unsigned offset, int value)
164{
165 struct da9052_gpio *gpio = to_da9052_gpio(gc);
166 unsigned char register_value;
167 int ret;
168
169 /* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */
170 register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 |
171 value << 3;
172
173 if (da9052_gpio_port_odd(offset))
174 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
175 DA9052_GPIO_0_1_REG,
176 DA9052_GPIO_MASK_UPPER_NIBBLE,
177 (register_value <<
178 DA9052_GPIO_NIBBLE_SHIFT));
179 else
180 ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
181 DA9052_GPIO_0_1_REG,
182 DA9052_GPIO_MASK_LOWER_NIBBLE,
183 register_value);
184
185 return ret;
186}
187
188static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset)
189{
190 struct da9052_gpio *gpio = to_da9052_gpio(gc);
191 struct da9052 *da9052 = gpio->da9052;
192
193 return da9052->irq_base + DA9052_IRQ_GPI0 + offset;
194}
195
196static struct gpio_chip reference_gp __devinitdata = {
197 .label = "da9052-gpio",
198 .owner = THIS_MODULE,
199 .get = da9052_gpio_get,
200 .set = da9052_gpio_set,
201 .direction_input = da9052_gpio_direction_input,
202 .direction_output = da9052_gpio_direction_output,
203 .to_irq = da9052_gpio_to_irq,
204 .can_sleep = 1;
205 .ngpio = 16;
206 .base = -1;
207};
208
209static int __devinit da9052_gpio_probe(struct platform_device *pdev)
210{
211 struct da9052_gpio *gpio;
212 struct da9052_pdata *pdata;
213 int ret;
214
215 gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);
216 if (gpio == NULL)
217 return -ENOMEM;
218
219 gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
220 pdata = gpio->da9052->dev->platform_data;
221
222 gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
223 gpio->gp = reference_gp;
224 if (pdata && pdata->gpio_base)
225 gpio->gp.base = pdata->gpio_base;
226
227 ret = gpiochip_add(&gpio->gp);
228 if (ret < 0) {
229 dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
230 goto err_mem;
231 }
232
233 platform_set_drvdata(pdev, gpio);
234
235 return 0;
236
237err_mem:
238 kfree(gpio);
239 return ret;
240}
241
242static int __devexit da9052_gpio_remove(struct platform_device *pdev)
243{
244 struct da9052_gpio *gpio = platform_get_drvdata(pdev);
245 int ret;
246
247 ret = gpiochip_remove(&gpio->gp);
248 if (ret == 0)
249 kfree(gpio);
250
251 return ret;
252}
253
254static struct platform_driver da9052_gpio_driver = {
255 .probe = da9052_gpio_probe,
256 .remove = __devexit_p(da9052_gpio_remove),
257 .driver = {
258 .name = "da9052-gpio",
259 .owner = THIS_MODULE,
260 },
261};
262
263static int __init da9052_gpio_init(void)
264{
265 return platform_driver_register(&da9052_gpio_driver);
266}
267module_init(da9052_gpio_init);
268
269static void __exit da9052_gpio_exit(void)
270{
271 return platform_driver_unregister(&da9052_gpio_driver);
272}
273module_exit(da9052_gpio_exit);
274
275MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
276MODULE_DESCRIPTION("DA9052 GPIO Device Driver");
277MODULE_LICENSE("GPL");
278MODULE_ALIAS("platform:da9052-gpio");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 11:04:11 -0500