| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mfd/ucb1x00-assabet.c |
| 3 | * |
| 4 | * Copyright (C) 2001-2003 Russell King, All Rights Reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License. |
| 9 | * |
| 10 | * We handle the machine-specific bits of the UCB1x00 driver here. |
| 11 | */ |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/fs.h> |
| 17 | #include <linux/gpio_keys.h> |
| 18 | #include <linux/input.h> |
| 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/proc_fs.h> |
| 21 | #include <linux/mfd/ucb1x00.h> |
| 22 | |
| 23 | #define UCB1X00_ATTR(name,input)\ |
| 24 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ |
| 25 | char *buf) \ |
| 26 | { \ |
| 27 | struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ |
| 28 | int val; \ |
| 29 | ucb1x00_adc_enable(ucb); \ |
| 30 | val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ |
| 31 | ucb1x00_adc_disable(ucb); \ |
| 32 | return sprintf(buf, "%d\n", val); \ |
| 33 | } \ |
| 34 | static DEVICE_ATTR(name,0444,name##_show,NULL) |
| 35 | |
| 36 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); |
| 37 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); |
| 38 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); |
| 39 | |
| 40 | static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) |
| 41 | { |
| 42 | struct ucb1x00 *ucb = dev->ucb; |
| 43 | struct platform_device *pdev; |
| 44 | struct gpio_keys_platform_data keys; |
| 45 | static struct gpio_keys_button buttons[6]; |
| 46 | unsigned i; |
| 47 | |
| 48 | memset(buttons, 0, sizeof(buttons)); |
| 49 | memset(&keys, 0, sizeof(keys)); |
| 50 | |
| 51 | for (i = 0; i < ARRAY_SIZE(buttons); i++) { |
| 52 | buttons[i].code = BTN_0 + i; |
| 53 | buttons[i].gpio = ucb->gpio.base + i; |
| 54 | buttons[i].type = EV_KEY; |
| 55 | buttons[i].can_disable = true; |
| 56 | } |
| 57 | |
| 58 | keys.buttons = buttons; |
| 59 | keys.nbuttons = ARRAY_SIZE(buttons); |
| 60 | keys.poll_interval = 50; |
| 61 | keys.name = "ucb1x00"; |
| 62 | |
| 63 | pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1, |
| 64 | &keys, sizeof(keys)); |
| 65 | |
| 66 | device_create_file(&ucb->dev, &dev_attr_vbatt); |
| 67 | device_create_file(&ucb->dev, &dev_attr_vcharger); |
| 68 | device_create_file(&ucb->dev, &dev_attr_batt_temp); |
| 69 | |
| 70 | dev->priv = pdev; |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) |
| 75 | { |
| 76 | struct platform_device *pdev = dev->priv; |
| 77 | |
| 78 | if (!IS_ERR(pdev)) |
| 79 | platform_device_unregister(pdev); |
| 80 | |
| 81 | device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); |
| 82 | device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); |
| 83 | device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); |
| 84 | } |
| 85 | |
| 86 | static struct ucb1x00_driver ucb1x00_assabet_driver = { |
| 87 | .add = ucb1x00_assabet_add, |
| 88 | .remove = ucb1x00_assabet_remove, |
| 89 | }; |
| 90 | |
| 91 | static int __init ucb1x00_assabet_init(void) |
| 92 | { |
| 93 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); |
| 94 | } |
| 95 | |
| 96 | static void __exit ucb1x00_assabet_exit(void) |
| 97 | { |
| 98 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); |
| 99 | } |
| 100 | |
| 101 | module_init(ucb1x00_assabet_init); |
| 102 | module_exit(ucb1x00_assabet_exit); |
| 103 | |
| 104 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); |
| 105 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); |
| 106 | MODULE_LICENSE("GPL"); |