diff options
Diffstat (limited to 'drivers/extcon/extcon-adc-jack.c')
| -rw-r--r-- | drivers/extcon/extcon-adc-jack.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c deleted file mode 100644 index da058f7033e..00000000000 --- a/drivers/extcon/extcon-adc-jack.c +++ /dev/null @@ -1,195 +0,0 @@ -/* - * drivers/extcon/extcon-adc-jack.c - * - * Analog Jack extcon driver with ADC-based detection capability. - * - * Copyright (C) 2012 Samsung Electronics - * MyungJoo Ham <myungjoo.ham@samsung.com> - * - * Modified for calling to IIO to get adc by <anish.singh@samsung.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/err.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/iio/consumer.h> -#include <linux/extcon/extcon-adc-jack.h> -#include <linux/extcon.h> - -/** - * struct adc_jack_data - internal data for adc_jack device driver - * @edev - extcon device. - * @cable_names - list of supported cables. - * @num_cables - size of cable_names. - * @adc_conditions - list of adc value conditions. - * @num_conditions - size of adc_conditions. - * @irq - irq number of attach/detach event (0 if not exist). - * @handling_delay - interrupt handler will schedule extcon event - * handling at handling_delay jiffies. - * @handler - extcon event handler called by interrupt handler. - * @chan - iio channel being queried. - */ -struct adc_jack_data { - struct extcon_dev edev; - - const char **cable_names; - int num_cables; - struct adc_jack_cond *adc_conditions; - int num_conditions; - - int irq; - unsigned long handling_delay; /* in jiffies */ - struct delayed_work handler; - - struct iio_channel *chan; -}; - -static void adc_jack_handler(struct work_struct *work) -{ - struct adc_jack_data *data = container_of(to_delayed_work(work), - struct adc_jack_data, - handler); - u32 state = 0; - int ret, adc_val; - int i; - - ret = iio_read_channel_raw(data->chan, &adc_val); - if (ret < 0) { - dev_err(data->edev.dev, "read channel() error: %d\n", ret); - return; - } - - /* Get state from adc value with adc_conditions */ - for (i = 0; i < data->num_conditions; i++) { - struct adc_jack_cond *def = &data->adc_conditions[i]; - if (!def->state) - break; - if (def->min_adc <= adc_val && def->max_adc >= adc_val) { - state = def->state; - break; - } - } - /* if no def has met, it means state = 0 (no cables attached) */ - - extcon_set_state(&data->edev, state); -} - -static irqreturn_t adc_jack_irq_thread(int irq, void *_data) -{ - struct adc_jack_data *data = _data; - - schedule_delayed_work(&data->handler, data->handling_delay); - return IRQ_HANDLED; -} - -static int __devinit adc_jack_probe(struct platform_device *pdev) -{ - struct adc_jack_data *data; - struct adc_jack_pdata *pdata = pdev->dev.platform_data; - int i, err = 0; - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - data->edev.name = pdata->name; - - if (pdata->cable_names) - data->edev.supported_cable = pdata->cable_names; - else - data->edev.supported_cable = extcon_cable_name; - - /* Check the length of array and set num_cables */ - for (i = 0; data->edev.supported_cable[i]; i++) - ; - if (i == 0 || i > SUPPORTED_CABLE_MAX) { - err = -EINVAL; - dev_err(&pdev->dev, "error: pdata->cable_names size = %d\n", - i - 1); - goto out; - } - data->num_cables = i; - - if (!pdata->adc_conditions || - !pdata->adc_conditions[0].state) { - err = -EINVAL; - dev_err(&pdev->dev, "error: adc_conditions not defined.\n"); - goto out; - } - data->adc_conditions = pdata->adc_conditions; - - /* Check the length of array and set num_conditions */ - for (i = 0; data->adc_conditions[i].state; i++) - ; - data->num_conditions = i; - - data->chan = iio_channel_get(dev_name(&pdev->dev), - pdata->consumer_channel); - if (IS_ERR(data->chan)) { - err = PTR_ERR(data->chan); - goto out; - } - - data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms); - - INIT_DELAYED_WORK_DEFERRABLE(&data->handler, adc_jack_handler); - - platform_set_drvdata(pdev, data); - - err = extcon_dev_register(&data->edev, &pdev->dev); - if (err) - goto out; - - data->irq = platform_get_irq(pdev, 0); - if (!data->irq) { - dev_err(&pdev->dev, "platform_get_irq failed\n"); - err = -ENODEV; - goto err_irq; - } - - err = request_any_context_irq(data->irq, adc_jack_irq_thread, - pdata->irq_flags, pdata->name, data); - - if (err) { - dev_err(&pdev->dev, "error: irq %d\n", data->irq); - err = -EINVAL; - goto err_irq; - } - - goto out; - -err_irq: - extcon_dev_unregister(&data->edev); -out: - return err; -} - -static int __devexit adc_jack_remove(struct platform_device *pdev) -{ - struct adc_jack_data *data = platform_get_drvdata(pdev); - - free_irq(data->irq, data); - cancel_work_sync(&data->handler.work); - extcon_dev_unregister(&data->edev); - - return 0; -} - -static struct platform_driver adc_jack_driver = { - .probe = adc_jack_probe, - .remove = __devexit_p(adc_jack_remove), - .driver = { - .name = "adc-jack", - .owner = THIS_MODULE, - }, -}; - -module_platform_driver(adc_jack_driver); |