Commit | Line | Data |
---|---|---|
84a14ae8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
48c92022 RK |
2 | /* |
3 | * linux/drivers/mfd/ucb1x00-assabet.c | |
4 | * | |
5 | * Copyright (C) 2001-2003 Russell King, All Rights Reserved. | |
6 | * | |
48c92022 RK |
7 | * We handle the machine-specific bits of the UCB1x00 driver here. |
8 | */ | |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
54292a46 RK |
11 | #include <linux/device.h> |
12 | #include <linux/err.h> | |
48c92022 | 13 | #include <linux/fs.h> |
54292a46 RK |
14 | #include <linux/gpio_keys.h> |
15 | #include <linux/input.h> | |
16 | #include <linux/platform_device.h> | |
48c92022 | 17 | #include <linux/proc_fs.h> |
c8602edf | 18 | #include <linux/mfd/ucb1x00.h> |
48c92022 | 19 | |
48c92022 | 20 | #define UCB1X00_ATTR(name,input)\ |
cd4c1eb5 | 21 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ |
0c55445f | 22 | char *buf) \ |
48c92022 RK |
23 | { \ |
24 | struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ | |
25 | int val; \ | |
26 | ucb1x00_adc_enable(ucb); \ | |
27 | val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ | |
28 | ucb1x00_adc_disable(ucb); \ | |
29 | return sprintf(buf, "%d\n", val); \ | |
30 | } \ | |
47ed390b | 31 | static DEVICE_ATTR_RO(name) |
48c92022 RK |
32 | |
33 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); | |
34 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); | |
35 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); | |
36 | ||
37 | static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) | |
38 | { | |
54292a46 RK |
39 | struct ucb1x00 *ucb = dev->ucb; |
40 | struct platform_device *pdev; | |
41 | struct gpio_keys_platform_data keys; | |
42 | static struct gpio_keys_button buttons[6]; | |
43 | unsigned i; | |
44 | ||
45 | memset(buttons, 0, sizeof(buttons)); | |
46 | memset(&keys, 0, sizeof(keys)); | |
47 | ||
48 | for (i = 0; i < ARRAY_SIZE(buttons); i++) { | |
49 | buttons[i].code = BTN_0 + i; | |
50 | buttons[i].gpio = ucb->gpio.base + i; | |
51 | buttons[i].type = EV_KEY; | |
52 | buttons[i].can_disable = true; | |
53 | } | |
54 | ||
55 | keys.buttons = buttons; | |
56 | keys.nbuttons = ARRAY_SIZE(buttons); | |
57 | keys.poll_interval = 50; | |
58 | keys.name = "ucb1x00"; | |
59 | ||
60 | pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1, | |
61 | &keys, sizeof(keys)); | |
62 | ||
63 | device_create_file(&ucb->dev, &dev_attr_vbatt); | |
64 | device_create_file(&ucb->dev, &dev_attr_vcharger); | |
65 | device_create_file(&ucb->dev, &dev_attr_batt_temp); | |
66 | ||
67 | dev->priv = pdev; | |
48c92022 RK |
68 | return 0; |
69 | } | |
70 | ||
71 | static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) | |
72 | { | |
54292a46 RK |
73 | struct platform_device *pdev = dev->priv; |
74 | ||
75 | if (!IS_ERR(pdev)) | |
76 | platform_device_unregister(pdev); | |
77 | ||
cd4c1eb5 RK |
78 | device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); |
79 | device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); | |
80 | device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); | |
48c92022 RK |
81 | } |
82 | ||
83 | static struct ucb1x00_driver ucb1x00_assabet_driver = { | |
84 | .add = ucb1x00_assabet_add, | |
85 | .remove = ucb1x00_assabet_remove, | |
86 | }; | |
87 | ||
88 | static int __init ucb1x00_assabet_init(void) | |
89 | { | |
90 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); | |
91 | } | |
92 | ||
93 | static void __exit ucb1x00_assabet_exit(void) | |
94 | { | |
95 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); | |
96 | } | |
97 | ||
98 | module_init(ucb1x00_assabet_init); | |
99 | module_exit(ucb1x00_assabet_exit); | |
100 | ||
101 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); | |
102 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); | |
103 | MODULE_LICENSE("GPL"); |