diff options
| -rw-r--r-- | drivers/extcon/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/extcon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/extcon/extcon-adc-jack.c | 195 | ||||
| -rw-r--r-- | include/linux/extcon/extcon-adc-jack.h | 73 |
4 files changed, 0 insertions, 275 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index dd5b01b957aa..e175c8ed4ec4 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -21,12 +21,6 @@ config EXTCON_GPIO Say Y here to enable GPIO based extcon support. Note that GPIO extcon supports single state per extcon instance. -config EXTCON_ADC_JACK - tristate "ADC Jack extcon support" - depends on IIO - help - Say Y here to enable extcon device driver based on ADC values. - config EXTCON_MAX77693 tristate "MAX77693 EXTCON Support" depends on MFD_MAX77693 diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile index 53d88c1cce36..88961b332348 100644 --- a/drivers/extcon/Makefile +++ b/drivers/extcon/Makefile @@ -4,7 +4,6 @@ obj-$(CONFIG_EXTCON) += extcon_class.o obj-$(CONFIG_EXTCON_GPIO) += extcon_gpio.o -obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c deleted file mode 100644 index da058f7033ef..000000000000 --- 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); diff --git a/include/linux/extcon/extcon-adc-jack.h b/include/linux/extcon/extcon-adc-jack.h deleted file mode 100644 index a1603cfc504f..000000000000 --- a/include/linux/extcon/extcon-adc-jack.h +++ /dev/null @@ -1,73 +0,0 @@ -/* - * include/linux/extcon/extcon-adc-jack.h - * - * Analog Jack extcon driver with ADC-based detection capability. - * - * Copyright (C) 2012 Samsung Electronics - * MyungJoo Ham <myungjoo.ham@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. - * - */ - -#ifndef _EXTCON_ADC_JACK_H_ -#define _EXTCON_ADC_JACK_H_ __FILE__ - -#include <linux/module.h> -#include <linux/extcon.h> - -/** - * struct adc_jack_cond - condition to use an extcon state - * @state - the corresponding extcon state (if 0, this struct denotes - * the last adc_jack_cond element among the array) - * @min_adc - min adc value for this condition - * @max_adc - max adc value for this condition - * - * For example, if { .state = 0x3, .min_adc = 100, .max_adc = 200}, it means - * that if ADC value is between (inclusive) 100 and 200, than the cable 0 and - * 1 are attached (1<<0 | 1<<1 == 0x3) - * - * Note that you don't need to describe condition for "no cable attached" - * because when no adc_jack_cond is met, state = 0 is automatically chosen. - */ -struct adc_jack_cond { - u32 state; /* extcon state value. 0 if invalid */ - u32 min_adc; - u32 max_adc; -}; - -/** - * struct adc_jack_pdata - platform data for adc jack device. - * @name - name of the extcon device. If null, "adc-jack" is used. - * @consumer_channel - Unique name to identify the channel on the consumer - * side. This typically describes the channels used within - * the consumer. E.g. 'battery_voltage' - * @cable_names - array of cable names ending with null. If the array itself - * if null, extcon standard cable names are chosen. - * @adc_contitions - array of struct adc_jack_cond conditions ending - * with .state = 0 entry. This describes how to decode - * adc values into extcon state. - * @irq_flags - irq flags used for the @irq - * @handling_delay_ms - in some devices, we need to read ADC value some - * milli-seconds after the interrupt occurs. You may - * describe such delays with @handling_delay_ms, which - * is rounded-off by jiffies. - */ -struct adc_jack_pdata { - const char *name; - const char *consumer_channel; - /* - * NULL if standard extcon names are used. - * The last entry should be NULL - */ - const char **cable_names; - /* The last entry's state should be 0 */ - struct adc_jack_cond *adc_conditions; - - unsigned long irq_flags; - unsigned long handling_delay_ms; /* in ms */ -}; - -#endif /* _EXTCON_ADC_JACK_H */ |