diff options
Diffstat (limited to 'drivers/staging/iio/adc/adt7310.c')
-rw-r--r-- | drivers/staging/iio/adc/adt7310.c | 206 |
1 files changed, 84 insertions, 122 deletions
diff --git a/drivers/staging/iio/adc/adt7310.c b/drivers/staging/iio/adc/adt7310.c index 771a409ee94c..68eca0b99ac0 100644 --- a/drivers/staging/iio/adc/adt7310.c +++ b/drivers/staging/iio/adc/adt7310.c @@ -7,15 +7,12 @@ */ #include <linux/interrupt.h> -#include <linux/gpio.h> -#include <linux/workqueue.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/list.h> #include <linux/spi/spi.h> -#include <linux/rtc.h> #include "../iio.h" #include "../sysfs.h" @@ -82,11 +79,8 @@ */ struct adt7310_chip_info { - const char *name; struct spi_device *spi_dev; struct iio_dev *indio_dev; - struct work_struct thresh_work; - s64 last_timestamp; u8 config; }; @@ -380,24 +374,12 @@ static ssize_t adt7310_show_value(struct device *dev, static IIO_DEVICE_ATTR(value, S_IRUGO, adt7310_show_value, NULL, 0); -static ssize_t adt7310_show_name(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct adt7310_chip_info *chip = dev_info->dev_data; - return sprintf(buf, "%s\n", chip->name); -} - -static IIO_DEVICE_ATTR(name, S_IRUGO, adt7310_show_name, NULL, 0); - static struct attribute *adt7310_attributes[] = { &iio_dev_attr_available_modes.dev_attr.attr, &iio_dev_attr_mode.dev_attr.attr, &iio_dev_attr_resolution.dev_attr.attr, &iio_dev_attr_id.dev_attr.attr, &iio_dev_attr_value.dev_attr.attr, - &iio_dev_attr_name.dev_attr.attr, NULL, }; @@ -405,53 +387,39 @@ static const struct attribute_group adt7310_attribute_group = { .attrs = adt7310_attributes, }; -/* - * temperature bound events - */ - -#define IIO_EVENT_CODE_ADT7310_ABOVE_ALARM IIO_BUFFER_EVENT_CODE(0) -#define IIO_EVENT_CODE_ADT7310_BELLOW_ALARM IIO_BUFFER_EVENT_CODE(1) -#define IIO_EVENT_CODE_ADT7310_ABOVE_CRIT IIO_BUFFER_EVENT_CODE(2) - -static void adt7310_interrupt_bh(struct work_struct *work_s) +static irqreturn_t adt7310_event_handler(int irq, void *private) { - struct adt7310_chip_info *chip = - container_of(work_s, struct adt7310_chip_info, thresh_work); + struct iio_dev *indio_dev = private; + struct adt7310_chip_info *chip = iio_dev_get_devdata(indio_dev); + s64 timestamp = iio_get_time_ns(); u8 status; + int ret; - if (adt7310_spi_read_byte(chip, ADT7310_STATUS, &status)) - return; + ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); + if (ret) + return ret; if (status & ADT7310_STAT_T_HIGH) - iio_push_event(chip->indio_dev, 0, - IIO_EVENT_CODE_ADT7310_ABOVE_ALARM, - chip->last_timestamp); + iio_push_event(indio_dev, 0, + IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + timestamp); if (status & ADT7310_STAT_T_LOW) - iio_push_event(chip->indio_dev, 0, - IIO_EVENT_CODE_ADT7310_BELLOW_ALARM, - chip->last_timestamp); + iio_push_event(indio_dev, 0, + IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + timestamp); if (status & ADT7310_STAT_T_CRIT) - iio_push_event(chip->indio_dev, 0, - IIO_EVENT_CODE_ADT7310_ABOVE_CRIT, - chip->last_timestamp); + iio_push_event(indio_dev, 0, + IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + timestamp); + return IRQ_HANDLED; } -static int adt7310_interrupt(struct iio_dev *dev_info, - int index, - s64 timestamp, - int no_test) -{ - struct adt7310_chip_info *chip = dev_info->dev_data; - - chip->last_timestamp = timestamp; - schedule_work(&chip->thresh_work); - - return 0; -} - -IIO_EVENT_SH(adt7310, &adt7310_interrupt); -IIO_EVENT_SH(adt7310_ct, &adt7310_interrupt); - static ssize_t adt7310_show_event_mode(struct device *dev, struct device_attribute *attr, char *buf) @@ -729,49 +697,62 @@ static inline ssize_t adt7310_set_t_hyst(struct device *dev, return len; } -IIO_EVENT_ATTR_SH(event_mode, iio_event_adt7310, - adt7310_show_event_mode, adt7310_set_event_mode, 0); -IIO_EVENT_ATTR_SH(available_event_modes, iio_event_adt7310, - adt7310_show_available_event_modes, NULL, 0); -IIO_EVENT_ATTR_SH(fault_queue, iio_event_adt7310, - adt7310_show_fault_queue, adt7310_set_fault_queue, 0); -IIO_EVENT_ATTR_SH(t_alarm_high, iio_event_adt7310, - adt7310_show_t_alarm_high, adt7310_set_t_alarm_high, 0); -IIO_EVENT_ATTR_SH(t_alarm_low, iio_event_adt7310, - adt7310_show_t_alarm_low, adt7310_set_t_alarm_low, 0); -IIO_EVENT_ATTR_SH(t_crit, iio_event_adt7310_ct, - adt7310_show_t_crit, adt7310_set_t_crit, 0); -IIO_EVENT_ATTR_SH(t_hyst, iio_event_adt7310, - adt7310_show_t_hyst, adt7310_set_t_hyst, 0); +static IIO_DEVICE_ATTR(event_mode, + S_IRUGO | S_IWUSR, + adt7310_show_event_mode, adt7310_set_event_mode, 0); +static IIO_DEVICE_ATTR(available_event_modes, + S_IRUGO | S_IWUSR, + adt7310_show_available_event_modes, NULL, 0); +static IIO_DEVICE_ATTR(fault_queue, + S_IRUGO | S_IWUSR, + adt7310_show_fault_queue, adt7310_set_fault_queue, 0); +static IIO_DEVICE_ATTR(t_alarm_high, + S_IRUGO | S_IWUSR, + adt7310_show_t_alarm_high, adt7310_set_t_alarm_high, 0); +static IIO_DEVICE_ATTR(t_alarm_low, + S_IRUGO | S_IWUSR, + adt7310_show_t_alarm_low, adt7310_set_t_alarm_low, 0); +static IIO_DEVICE_ATTR(t_crit, + S_IRUGO | S_IWUSR, + adt7310_show_t_crit, adt7310_set_t_crit, 0); +static IIO_DEVICE_ATTR(t_hyst, + S_IRUGO | S_IWUSR, + adt7310_show_t_hyst, adt7310_set_t_hyst, 0); static struct attribute *adt7310_event_int_attributes[] = { - &iio_event_attr_event_mode.dev_attr.attr, - &iio_event_attr_available_event_modes.dev_attr.attr, - &iio_event_attr_fault_queue.dev_attr.attr, - &iio_event_attr_t_alarm_high.dev_attr.attr, - &iio_event_attr_t_alarm_low.dev_attr.attr, - &iio_event_attr_t_hyst.dev_attr.attr, + &iio_dev_attr_event_mode.dev_attr.attr, + &iio_dev_attr_available_event_modes.dev_attr.attr, + &iio_dev_attr_fault_queue.dev_attr.attr, + &iio_dev_attr_t_alarm_high.dev_attr.attr, + &iio_dev_attr_t_alarm_low.dev_attr.attr, + &iio_dev_attr_t_hyst.dev_attr.attr, NULL, }; static struct attribute *adt7310_event_ct_attributes[] = { - &iio_event_attr_event_mode.dev_attr.attr, - &iio_event_attr_available_event_modes.dev_attr.attr, - &iio_event_attr_fault_queue.dev_attr.attr, - &iio_event_attr_t_crit.dev_attr.attr, - &iio_event_attr_t_hyst.dev_attr.attr, + &iio_dev_attr_event_mode.dev_attr.attr, + &iio_dev_attr_available_event_modes.dev_attr.attr, + &iio_dev_attr_fault_queue.dev_attr.attr, + &iio_dev_attr_t_crit.dev_attr.attr, + &iio_dev_attr_t_hyst.dev_attr.attr, NULL, }; static struct attribute_group adt7310_event_attribute_group[ADT7310_IRQS] = { { .attrs = adt7310_event_int_attributes, - }, - { + }, { .attrs = adt7310_event_ct_attributes, } }; +static const struct iio_info adt7310_info = { + .attrs = &adt7310_attribute_group, + .num_interrupt_lines = ADT7310_IRQS, + .event_attrs = adt7310_event_attribute_group, + .driver_module = THIS_MODULE, +}; + /* * device probe and remove */ @@ -792,20 +773,17 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev) dev_set_drvdata(&spi_dev->dev, chip); chip->spi_dev = spi_dev; - chip->name = spi_dev->modalias; - chip->indio_dev = iio_allocate_device(); + chip->indio_dev = iio_allocate_device(0); if (chip->indio_dev == NULL) { ret = -ENOMEM; goto error_free_chip; } chip->indio_dev->dev.parent = &spi_dev->dev; - chip->indio_dev->attrs = &adt7310_attribute_group; - chip->indio_dev->event_attrs = adt7310_event_attribute_group; + chip->indio_dev->name = spi_get_device_id(spi_dev)->name; + chip->indio_dev->info = &adt7310_info; chip->indio_dev->dev_data = (void *)chip; - chip->indio_dev->driver_module = THIS_MODULE; - chip->indio_dev->num_interrupt_lines = ADT7310_IRQS; chip->indio_dev->modes = INDIO_DIRECT_MODE; ret = iio_device_register(chip->indio_dev); @@ -818,45 +796,29 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev) irq_flags = adt7310_platform_data[2]; else irq_flags = IRQF_TRIGGER_LOW; - ret = iio_register_interrupt_line(spi_dev->irq, - chip->indio_dev, - 0, - irq_flags, - chip->name); + ret = request_threaded_irq(spi_dev->irq, + NULL, + &adt7310_event_handler, + irq_flags, + chip->indio_dev->name, + chip->indio_dev); if (ret) goto error_unreg_dev; - - /* - * The event handler list element refer to iio_event_adt7310. - * All event attributes bind to the same event handler. - * One event handler can only be added to one event list. - */ - iio_add_event_to_list(&iio_event_adt7310, - &chip->indio_dev->interrupts[0]->ev_list); } /* INT bound temperature alarm event. line 1 */ if (adt7310_platform_data[0]) { - ret = iio_register_interrupt_line(adt7310_platform_data[0], - chip->indio_dev, - 1, - adt7310_platform_data[1], - chip->name); + ret = request_threaded_irq(adt7310_platform_data[0], + NULL, + &adt7310_event_handler, + adt7310_platform_data[1], + chip->indio_dev->name, + chip->indio_dev); if (ret) goto error_unreg_ct_irq; - - /* - * The event handler list element refer to iio_event_adt7310. - * All event attributes bind to the same event handler. - * One event handler can only be added to one event list. - */ - iio_add_event_to_list(&iio_event_adt7310_ct, - &chip->indio_dev->interrupts[1]->ev_list); } if (spi_dev->irq && adt7310_platform_data[0]) { - INIT_WORK(&chip->thresh_work, adt7310_interrupt_bh); - ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); if (ret) { ret = -EIO; @@ -879,14 +841,14 @@ static int __devinit adt7310_probe(struct spi_device *spi_dev) } dev_info(&spi_dev->dev, "%s temperature sensor registered.\n", - chip->name); + chip->indio_dev->name); return 0; error_unreg_int_irq: - iio_unregister_interrupt_line(chip->indio_dev, 1); + free_irq(adt7310_platform_data[0], chip->indio_dev); error_unreg_ct_irq: - iio_unregister_interrupt_line(chip->indio_dev, 0); + free_irq(spi_dev->irq, chip->indio_dev); error_unreg_dev: iio_device_unregister(chip->indio_dev); error_free_dev: @@ -905,9 +867,9 @@ static int __devexit adt7310_remove(struct spi_device *spi_dev) dev_set_drvdata(&spi_dev->dev, NULL); if (adt7310_platform_data[0]) - iio_unregister_interrupt_line(indio_dev, 1); + free_irq(adt7310_platform_data[0], chip->indio_dev); if (spi_dev->irq) - iio_unregister_interrupt_line(indio_dev, 0); + free_irq(spi_dev->irq, chip->indio_dev); iio_device_unregister(indio_dev); iio_free_device(chip->indio_dev); kfree(chip); |