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54292a4649
Add support for UCB1x00 GPIO buttons found on the Assabet platform. We can now trivially support these buttons as we have standardized gpiolib, genirq and gpio keyboard support in place for this device. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
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* linux/drivers/mfd/ucb1x00-assabet.c
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*
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* Copyright (C) 2001-2003 Russell King, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*
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* We handle the machine-specific bits of the UCB1x00 driver here.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/gpio_keys.h>
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#include <linux/input.h>
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#include <linux/platform_device.h>
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#include <linux/proc_fs.h>
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#include <linux/mfd/ucb1x00.h>
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#define UCB1X00_ATTR(name,input)\
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static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \
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int val; \
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ucb1x00_adc_enable(ucb); \
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val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \
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ucb1x00_adc_disable(ucb); \
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return sprintf(buf, "%d\n", val); \
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} \
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static DEVICE_ATTR(name,0444,name##_show,NULL)
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UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
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UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
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UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
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static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
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{
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struct ucb1x00 *ucb = dev->ucb;
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struct platform_device *pdev;
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struct gpio_keys_platform_data keys;
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static struct gpio_keys_button buttons[6];
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unsigned i;
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memset(buttons, 0, sizeof(buttons));
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memset(&keys, 0, sizeof(keys));
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for (i = 0; i < ARRAY_SIZE(buttons); i++) {
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buttons[i].code = BTN_0 + i;
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buttons[i].gpio = ucb->gpio.base + i;
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buttons[i].type = EV_KEY;
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buttons[i].can_disable = true;
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}
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keys.buttons = buttons;
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keys.nbuttons = ARRAY_SIZE(buttons);
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keys.poll_interval = 50;
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keys.name = "ucb1x00";
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pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1,
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&keys, sizeof(keys));
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device_create_file(&ucb->dev, &dev_attr_vbatt);
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device_create_file(&ucb->dev, &dev_attr_vcharger);
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device_create_file(&ucb->dev, &dev_attr_batt_temp);
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dev->priv = pdev;
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return 0;
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}
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static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
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{
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struct platform_device *pdev = dev->priv;
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if (!IS_ERR(pdev))
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platform_device_unregister(pdev);
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device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp);
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device_remove_file(&dev->ucb->dev, &dev_attr_vcharger);
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device_remove_file(&dev->ucb->dev, &dev_attr_vbatt);
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}
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static struct ucb1x00_driver ucb1x00_assabet_driver = {
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.add = ucb1x00_assabet_add,
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.remove = ucb1x00_assabet_remove,
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};
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static int __init ucb1x00_assabet_init(void)
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{
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return ucb1x00_register_driver(&ucb1x00_assabet_driver);
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}
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static void __exit ucb1x00_assabet_exit(void)
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{
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ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
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}
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module_init(ucb1x00_assabet_init);
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module_exit(ucb1x00_assabet_exit);
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MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
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MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
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MODULE_LICENSE("GPL");
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