Date: | 2010-04-24 12:29:31 (13 years 11 months ago) |
---|---|
Author: | Lars C. |
Commit: | 77c61e9d04daab74596cdf9b814c01fa57cd7ce6 |
Message: | Add gpio chager driver |
Files: |
drivers/power/Kconfig (1 diff) drivers/power/Makefile (1 diff) drivers/power/gpio-charger.c (1 diff) include/linux/power/gpio-charger.h (1 diff) |
Change Details
drivers/power/Kconfig | ||
---|---|---|
185 | 185 | help |
186 | 186 | Say Y here to enable support for TWL4030 Battery Charge Interface. |
187 | 187 | |
188 | config CHARGER_GPIO | |
189 | tristate "GPIO charger" | |
190 | depends on GPIOLIB | |
191 | help | |
192 | Say Y to include support for chargers indicating their status through | |
193 | a GPIO pin. | |
194 | ||
188 | 195 | endif # POWER_SUPPLY |
drivers/power/Makefile | ||
---|---|---|
32 | 32 | obj-$(CONFIG_BATTERY_INTEL_MID) += intel_mid_battery.o |
33 | 33 | obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o |
34 | 34 | obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o |
35 | obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o |
drivers/power/gpio-charger.c | ||
---|---|---|
1 | /* | |
2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> | |
3 | * Driver for chargers indicating their status through a GPIO pin | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | * | |
10 | * You should have received a copy of the GNU General Public License along | |
11 | * with this program; if not, write to the Free Software Foundation, Inc., | |
12 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/device.h> | |
17 | #include <linux/gpio.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/power_supply.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/types.h> | |
26 | ||
27 | #include <linux/power/gpio-charger.h> | |
28 | ||
29 | struct gpio_charger { | |
30 | const struct gpio_charger_platform_data *pdata; | |
31 | ||
32 | int irq; | |
33 | ||
34 | struct power_supply charger; | |
35 | }; | |
36 | ||
37 | static irqreturn_t gpio_charger_irq(int irq, void *devid) | |
38 | { | |
39 | struct power_supply *charger = devid; | |
40 | power_supply_changed(charger); | |
41 | ||
42 | return IRQ_HANDLED; | |
43 | } | |
44 | ||
45 | static inline struct gpio_charger *psy_to_gpio_charger(struct power_supply *psy) | |
46 | { | |
47 | return container_of(psy, struct gpio_charger, charger); | |
48 | } | |
49 | ||
50 | static int gpio_charger_get_property(struct power_supply *psy, | |
51 | enum power_supply_property psp, union power_supply_propval *val) | |
52 | { | |
53 | struct gpio_charger *gpio_charger = psy_to_gpio_charger(psy); | |
54 | const struct gpio_charger_platform_data *pdata = gpio_charger->pdata; | |
55 | ||
56 | switch (psp) { | |
57 | case POWER_SUPPLY_PROP_ONLINE: | |
58 | val->intval = gpio_get_value(pdata->gpio); | |
59 | val->intval ^= pdata->gpio_active_low; | |
60 | break; | |
61 | default: | |
62 | return -EINVAL; | |
63 | } | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static enum power_supply_property gpio_charger_properties[] = { | |
69 | POWER_SUPPLY_PROP_ONLINE, | |
70 | }; | |
71 | ||
72 | static int __devinit gpio_charger_probe(struct platform_device *pdev) | |
73 | { | |
74 | const struct gpio_charger_platform_data *pdata = pdev->dev.platform_data; | |
75 | struct gpio_charger *gpio_charger; | |
76 | struct power_supply *charger; | |
77 | int ret; | |
78 | ||
79 | if (!pdata) { | |
80 | dev_err(&pdev->dev, "No platform data"); | |
81 | return -EINVAL; | |
82 | } | |
83 | ||
84 | gpio_charger = kzalloc(sizeof(*gpio_charger), GFP_KERNEL); | |
85 | ||
86 | charger = &gpio_charger->charger; | |
87 | ||
88 | charger->name = pdata->name; | |
89 | charger->type = pdata->type; | |
90 | charger->properties = gpio_charger_properties; | |
91 | charger->num_properties = ARRAY_SIZE(gpio_charger_properties); | |
92 | charger->get_property = gpio_charger_get_property; | |
93 | charger->supplied_to = pdata->batteries; | |
94 | charger->num_supplicants = pdata->num_batteries; | |
95 | ||
96 | if (gpio_is_valid(pdata->gpio)) { | |
97 | ret = gpio_request(pdata->gpio, dev_name(&pdev->dev)); | |
98 | if (ret) { | |
99 | dev_err(&pdev->dev, "Failed to request gpio pin: %d\n", ret); | |
100 | goto err; | |
101 | } | |
102 | ret = gpio_direction_input(pdata->gpio); | |
103 | if (ret) { | |
104 | dev_err(&pdev->dev, "Failed to set gpio to input: %d\n", ret); | |
105 | goto err_gpio_free; | |
106 | } | |
107 | ||
108 | gpio_charger->irq = gpio_to_irq(pdata->gpio); | |
109 | if (gpio_charger->irq >= 0) { | |
110 | ret = request_irq(gpio_charger->irq, gpio_charger_irq, | |
111 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
112 | dev_name(&pdev->dev), charger); | |
113 | if (ret) { | |
114 | dev_warn(&pdev->dev, "Failed to request online gpio irq: %d\n", ret); | |
115 | gpio_charger->irq = -1; | |
116 | } | |
117 | } | |
118 | } | |
119 | ||
120 | gpio_charger->pdata = pdata; | |
121 | ||
122 | ret = power_supply_register(&pdev->dev, charger); | |
123 | if (ret < 0) { | |
124 | dev_err(&pdev->dev, "Failed to register power supply: %d\n", ret); | |
125 | goto err_gpio_free; | |
126 | } | |
127 | ||
128 | platform_set_drvdata(pdev, gpio_charger); | |
129 | ||
130 | return 0; | |
131 | ||
132 | err_gpio_free: | |
133 | if (gpio_is_valid(pdata->gpio)) { | |
134 | if (gpio_charger->irq >= 0) | |
135 | free_irq(gpio_charger->irq, charger); | |
136 | gpio_free(pdata->gpio); | |
137 | } | |
138 | err: | |
139 | return ret; | |
140 | } | |
141 | ||
142 | static int __devexit gpio_charger_remove(struct platform_device *pdev) | |
143 | { | |
144 | struct gpio_charger *gpio_charger = platform_get_drvdata(pdev); | |
145 | const struct gpio_charger_platform_data *pdata = gpio_charger->pdata; | |
146 | ||
147 | power_supply_unregister(&gpio_charger->charger); | |
148 | ||
149 | if (gpio_is_valid(pdata->gpio)) { | |
150 | if (gpio_charger->irq >= 0) | |
151 | free_irq(gpio_charger->irq, &gpio_charger->charger); | |
152 | gpio_free(pdata->gpio); | |
153 | } | |
154 | ||
155 | platform_set_drvdata(pdev, NULL); | |
156 | kfree(gpio_charger); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static struct platform_driver gpio_charger_driver = { | |
162 | .probe = gpio_charger_probe, | |
163 | .remove = __devexit_p(gpio_charger_remove), | |
164 | .driver = { | |
165 | .name = "gpio-charger", | |
166 | .owner = THIS_MODULE, | |
167 | }, | |
168 | }; | |
169 | ||
170 | static int __init gpio_charger_init(void) | |
171 | { | |
172 | return platform_driver_register(&gpio_charger_driver); | |
173 | } | |
174 | module_init(gpio_charger_init); | |
175 | ||
176 | static void __exit gpio_charger_exit(void) | |
177 | { | |
178 | platform_driver_unregister(&gpio_charger_driver); | |
179 | } | |
180 | module_exit(gpio_charger_exit); | |
181 | ||
182 | MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); | |
183 | MODULE_DESCRIPTION("Driver for chargers indicating their status through a gpio"); | |
184 | MODULE_LICENSE("GPL"); | |
185 | MODULE_ALIAS("platform:gpio-charger"); |
include/linux/power/gpio-charger.h | ||
---|---|---|
1 | /* | |
2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * You should have received a copy of the GNU General Public License along | |
10 | * with this program; if not, write to the Free Software Foundation, Inc., | |
11 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
12 | * | |
13 | */ | |
14 | ||
15 | #ifndef __LINUX_POWER_GPIO_CHARGER_H__ | |
16 | #define __LINUX_POWER_GPIO_CHARGER_H__ | |
17 | ||
18 | struct gpio_charger_platform_data { | |
19 | const char *name; | |
20 | enum power_supply_type type; | |
21 | int gpio; | |
22 | int gpio_active_low; | |
23 | ||
24 | char **batteries; | |
25 | size_t num_batteries; | |
26 | }; | |
27 | ||
28 | #endif |
Branches:
ben-wpan
ben-wpan-stefan
5396a9238205f20f811ea57898980d3ca82df0b6
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9