/* * linux/drivers/mfd/ucb1x00-core.c * * Copyright (C) 2001 Russell King, All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License. * * The UCB1x00 core driver provides basic services for handling IO, * the ADC, interrupts, and accessing registers. It is designed * such that everything goes through this layer, thereby providing * a consistent locking methodology, as well as allowing the drivers * to be used on other non-MCP-enabled hardware platforms. * * Note that all locks are private to this file. Nothing else may * touch them. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/device.h> #include <linux/mutex.h> #include <linux/mfd/ucb1x00.h> #include <linux/pm.h> #include <linux/gpio.h> static DEFINE_MUTEX(ucb1x00_mutex); static LIST_HEAD(ucb1x00_drivers); static LIST_HEAD(ucb1x00_devices); /** * ucb1x00_io_set_dir - set IO direction * @ucb: UCB1x00 structure describing chip * @in: bitfield of IO pins to be set as inputs * @out: bitfield of IO pins to be set as outputs * * Set the IO direction of the ten general purpose IO pins on * the UCB1x00 chip. The @in bitfield has priority over the * @out bitfield, in that if you specify a pin as both input * and output, it will end up as an input. * * ucb1x00_enable must have been called to enable the comms * before using this function. * * This function takes a spinlock, disabling interrupts. */ void ucb1x00_io_set_dir(struct ucb1x00 *ucb, unsigned int in, unsigned int out) { unsigned long flags; spin_lock_irqsave(&ucb->io_lock, flags); ucb->io_dir |= out; ucb->io_dir &= ~in; ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); spin_unlock_irqrestore(&ucb->io_lock, flags); } /** * ucb1x00_io_write - set or clear IO outputs * @ucb: UCB1x00 structure describing chip * @set: bitfield of IO pins to set to logic '1' * @clear: bitfield of IO pins to set to logic '0' * * Set the IO output state of the specified IO pins. The value * is retained if the pins are subsequently configured as inputs. * The @clear bitfield has priority over the @set bitfield - * outputs will be cleared. * * ucb1x00_enable must have been called to enable the comms * before using this function. * * This function takes a spinlock, disabling interrupts. */ void ucb1x00_io_write(struct ucb1x00 *ucb, unsigned int set, unsigned int clear) { unsigned long flags; spin_lock_irqsave(&ucb->io_lock, flags); ucb->io_out |= set; ucb->io_out &= ~clear; ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); spin_unlock_irqrestore(&ucb->io_lock, flags); } /** * ucb1x00_io_read - read the current state of the IO pins * @ucb: UCB1x00 structure describing chip * * Return a bitfield describing the logic state of the ten * general purpose IO pins. * * ucb1x00_enable must have been called to enable the comms * before using this function. * * This function does not take any mutexes or spinlocks. */ unsigned int ucb1x00_io_read(struct ucb1x00 *ucb) { return ucb1x00_reg_read(ucb, UCB_IO_DATA); } static void ucb1x00_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio); unsigned long flags; spin_lock_irqsave(&ucb->io_lock, flags); if (value) ucb->io_out |= 1 << offset; else ucb->io_out &= ~(1 << offset); ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); ucb1x00_disable(ucb); spin_unlock_irqrestore(&ucb->io_lock, flags); } static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset) { struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio); unsigned val; ucb1x00_enable(ucb); val = ucb1x00_reg_read(ucb, UCB_IO_DATA); ucb1x00_disable(ucb); return val & (1 << offset); } static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio); unsigned long flags; spin_lock_irqsave(&ucb->io_lock, flags); ucb->io_dir &= ~(1 << offset); ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); ucb1x00_disable(ucb); spin_unlock_irqrestore(&ucb->io_lock, flags); return 0; } static int ucb1x00_gpio_direction_output(struct gpio_chip *chip, unsigned offset , int value) { struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio); unsigned long flags; unsigned old, mask = 1 << offset; spin_lock_irqsave(&ucb->io_lock, flags); old = ucb->io_out; if (value) ucb->io_out |= mask; else ucb->io_out &= ~mask; ucb1x00_enable(ucb); if (old != ucb->io_out) ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); if (!(ucb->io_dir & mask)) { ucb->io_dir |= mask; ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); } ucb1x00_disable(ucb); spin_unlock_irqrestore(&ucb->io_lock, flags); return 0; } static int ucb1x00_to_irq(struct gpio_chip *chip, unsigned offset) { struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio); return ucb->irq_base > 0 ? ucb->irq_base + offset : -ENXIO; } /* * UCB1300 data sheet says we must: * 1. enable ADC => 5us (including reference startup time) * 2. select input => 51*tsibclk => 4.3us * 3. start conversion => 102*tsibclk => 8.5us * (tsibclk = 1/11981000) * Period between SIB 128-bit frames = 10.7us */ /** * ucb1x00_adc_enable - enable the ADC converter * @ucb: UCB1x00 structure describing chip * * Enable the ucb1x00 and ADC converter on the UCB1x00 for use. * Any code wishing to use the ADC converter must call this * function prior to using it. * * This function takes the ADC mutex to prevent two or more * concurrent uses, and therefore may sleep. As a result, it * can only be called from process context, not interrupt * context. * * You should release the ADC as soon as possible using * ucb1x00_adc_disable. */ void ucb1x00_adc_enable(struct ucb1x00 *ucb) { mutex_lock(&ucb->adc_mutex); ucb->adc_cr |= UCB_ADC_ENA; ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr); } /** * ucb1x00_adc_read - read the specified ADC channel * @ucb: UCB1x00 structure describing chip * @adc_channel: ADC channel mask * @sync: wait for syncronisation pulse. * * Start an ADC conversion and wait for the result. Note that * synchronised ADC conversions (via the ADCSYNC pin) must wait * until the trigger is asserted and the conversion is finished. * * This function currently spins waiting for the conversion to * complete (2 frames max without sync). * * If called for a synchronised ADC conversion, it may sleep * with the ADC mutex held. */ unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync) { unsigned int val; if (sync) adc_channel |= UCB_ADC_SYNC_ENA; ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr | adc_channel); ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr | adc_channel | UCB_ADC_START); for (;;) { val = ucb1x00_reg_read(ucb, UCB_ADC_DATA); if (val & UCB_ADC_DAT_VAL) break; /* yield to other processes */ set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(1); } return UCB_ADC_DAT(val); } /** * ucb1x00_adc_disable - disable the ADC converter * @ucb: UCB1x00 structure describing chip * * Disable the ADC converter and release the ADC mutex. */ void ucb1x00_adc_disable(struct ucb1x00 *ucb) { ucb->adc_cr &= ~UCB_ADC_ENA; ucb1x00_reg_write(ucb, UCB_ADC_CR, ucb->adc_cr); ucb1x00_disable(ucb); mutex_unlock(&ucb->adc_mutex); } /* * UCB1x00 Interrupt handling. * * The UCB1x00 can generate interrupts when the SIBCLK is stopped. * Since we need to read an internal register, we must re-enable * SIBCLK to talk to the chip. We leave the clock running until * we have finished processing all interrupts from the chip. */ static void ucb1x00_irq(unsigned int irq, struct irq_desc *desc) { struct ucb1x00 *ucb = irq_desc_get_handler_data(desc); unsigned int isr, i; ucb1x00_enable(ucb); isr = ucb1x00_reg_read(ucb, UCB_IE_STATUS); ucb1x00_reg_write(ucb, UCB_IE_CLEAR, isr); ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0); for (i = 0; i < 16 && isr; i++, isr >>= 1, irq++) if (isr & 1) generic_handle_irq(ucb->irq_base + i); ucb1x00_disable(ucb); } static void ucb1x00_irq_update(struct ucb1x00 *ucb, unsigned mask) { ucb1x00_enable(ucb); if (ucb->irq_ris_enbl & mask) ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl & ucb->irq_mask); if (ucb->irq_fal_enbl & mask) ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl & ucb->irq_mask); ucb1x00_disable(ucb); } static void ucb1x00_irq_noop(struct irq_data *data) { } static void ucb1x00_irq_mask(struct irq_data *data) { struct ucb1x00 *ucb = irq_data_get_irq_chip_data(data); unsigned mask = 1 << (data->irq - ucb->irq_base); raw_spin_lock(&ucb->irq_lock); ucb->irq_mask &= ~mask; ucb1x00_irq_update(ucb, mask); raw_spin_unlock(&ucb->irq_lock); } static void ucb1x00_irq_unmask(struct irq_data *data) { struct ucb1x00 *ucb = irq_data_get_irq_chip_data(data); unsigned mask = 1 << (data->irq - ucb->irq_base); raw_spin_lock(&ucb->irq_lock); ucb->irq_mask |= mask; ucb1x00_irq_update(ucb, mask); raw_spin_unlock(&ucb->irq_lock); } static int ucb1x00_irq_set_type(struct irq_data *data, unsigned int type) { struct ucb1x00 *ucb = irq_data_get_irq_chip_data(data); unsigned mask = 1 << (data->irq - ucb->irq_base); raw_spin_lock(&ucb->irq_lock); if (type & IRQ_TYPE_EDGE_RISING) ucb->irq_ris_enbl |= mask; else ucb->irq_ris_enbl &= ~mask; if (type & IRQ_TYPE_EDGE_FALLING) ucb->irq_fal_enbl |= mask; else ucb->irq_fal_enbl &= ~mask; if (ucb->irq_mask & mask) { ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl & ucb->irq_mask); ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl & ucb->irq_mask); } raw_spin_unlock(&ucb->irq_lock); return 0; } static int ucb1x00_irq_set_wake(struct irq_data *data, unsigned int on) { struct ucb1x00 *ucb = irq_data_get_irq_chip_data(data); struct ucb1x00_plat_data *pdata = ucb->mcp->attached_device.platform_data; unsigned mask = 1 << (data->irq - ucb->irq_base); if (!pdata || !pdata->can_wakeup) return -EINVAL; raw_spin_lock(&ucb->irq_lock); if (on) ucb->irq_wake |= mask; else ucb->irq_wake &= ~mask; raw_spin_unlock(&ucb->irq_lock); return 0; } static struct irq_chip ucb1x00_irqchip = { .name = "ucb1x00", .irq_ack = ucb1x00_irq_noop, .irq_mask = ucb1x00_irq_mask, .irq_unmask = ucb1x00_irq_unmask, .irq_set_type = ucb1x00_irq_set_type, .irq_set_wake = ucb1x00_irq_set_wake, }; static int ucb1x00_add_dev(struct ucb1x00 *ucb, struct ucb1x00_driver *drv) { struct ucb1x00_dev *dev; int ret; dev = kmalloc(sizeof(struct ucb1x00_dev), GFP_KERNEL); if (!dev) return -ENOMEM; dev->ucb = ucb; dev->drv = drv; ret = drv->add(dev); if (ret) { kfree(dev); return ret; } list_add_tail(&dev->dev_node, &ucb->devs); list_add_tail(&dev->drv_node, &drv->devs); return ret; } static void ucb1x00_remove_dev(struct ucb1x00_dev *dev) { dev->drv->remove(dev); list_del(&dev->dev_node); list_del(&dev->drv_node); kfree(dev); } /* * Try to probe our interrupt, rather than relying on lots of * hard-coded machine dependencies. For reference, the expected * IRQ mappings are: * * Machine Default IRQ * adsbitsy IRQ_GPCIN4 * cerf IRQ_GPIO_UCB1200_IRQ * flexanet IRQ_GPIO_GUI * freebird IRQ_GPIO_FREEBIRD_UCB1300_IRQ * graphicsclient ADS_EXT_IRQ(8) * graphicsmaster ADS_EXT_IRQ(8) * lart LART_IRQ_UCB1200 * omnimeter IRQ_GPIO23 * pfs168 IRQ_GPIO_UCB1300_IRQ * simpad IRQ_GPIO_UCB1300_IRQ * shannon SHANNON_IRQ_GPIO_IRQ_CODEC * yopy IRQ_GPIO_UCB1200_IRQ */ static int ucb1x00_detect_irq(struct ucb1x00 *ucb) { unsigned long mask; mask = probe_irq_on(); if (!mask) { probe_irq_off(mask); return NO_IRQ; } /* * Enable the ADC interrupt. */ ucb1x00_reg_write(ucb, UCB_IE_RIS, UCB_IE_ADC); ucb1x00_reg_write(ucb, UCB_IE_FAL, UCB_IE_ADC); ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0xffff); ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0); /* * Cause an ADC interrupt. */ ucb1x00_reg_write(ucb, UCB_ADC_CR, UCB_ADC_ENA); ucb1x00_reg_write(ucb, UCB_ADC_CR, UCB_ADC_ENA | UCB_ADC_START); /* * Wait for the conversion to complete. */ while ((ucb1x00_reg_read(ucb, UCB_ADC_DATA) & UCB_ADC_DAT_VAL) == 0); ucb1x00_reg_write(ucb, UCB_ADC_CR, 0); /* * Disable and clear interrupt. */ ucb1x00_reg_write(ucb, UCB_IE_RIS, 0); ucb1x00_reg_write(ucb, UCB_IE_FAL, 0); ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0xffff); ucb1x00_reg_write(ucb, UCB_IE_CLEAR, 0); /* * Read triggered interrupt. */ return probe_irq_off(mask); } static void ucb1x00_release(struct device *dev) { struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); kfree(ucb); } static struct class ucb1x00_class = { .name = "ucb1x00", .dev_release = ucb1x00_release, }; static int ucb1x00_probe(struct mcp *mcp) { struct ucb1x00_plat_data *pdata = mcp->attached_device.platform_data; struct ucb1x00_driver *drv; struct ucb1x00 *ucb; unsigned id, i, irq_base; int ret = -ENODEV; /* Tell the platform to deassert the UCB1x00 reset */ if (pdata && pdata->reset) pdata->reset(UCB_RST_PROBE); mcp_enable(mcp); id = mcp_reg_read(mcp, UCB_ID); mcp_disable(mcp); if (id != UCB_ID_1200 && id != UCB_ID_1300 && id != UCB_ID_TC35143) { printk(KERN_WARNING "UCB1x00 ID not found: %04x\n", id); goto out; } ucb = kzalloc(sizeof(struct ucb1x00), GFP_KERNEL); ret = -ENOMEM; if (!ucb) goto out; device_initialize(&ucb->dev); ucb->dev.class = &ucb1x00_class; ucb->dev.parent = &mcp->attached_device; dev_set_name(&ucb->dev, "ucb1x00"); raw_spin_lock_init(&ucb->irq_lock); spin_lock_init(&ucb->io_lock); mutex_init(&ucb->adc_mutex); ucb->id = id; ucb->mcp = mcp; ret = device_add(&ucb->dev); if (ret) goto err_dev_add; ucb1x00_enable(ucb); ucb->irq = ucb1x00_detect_irq(ucb); ucb1x00_disable(ucb); if (ucb->irq == NO_IRQ) { dev_err(&ucb->dev, "IRQ probe failed\n"); ret = -ENODEV; goto err_no_irq; } ucb->gpio.base = -1; irq_base = pdata ? pdata->irq_base : 0; ucb->irq_base = irq_alloc_descs(-1, irq_base, 16, -1); if (ucb->irq_base < 0) { dev_err(&ucb->dev, "unable to allocate 16 irqs: %d\n", ucb->irq_base); ret = ucb->irq_base; goto err_irq_alloc; } for (i = 0; i < 16; i++) { unsigned irq = ucb->irq_base + i; irq_set_chip_and_handler(irq, &ucb1x00_irqchip, handle_edge_irq); irq_set_chip_data(irq, ucb); set_irq_flags(irq, IRQF_VALID | IRQ_NOREQUEST); } irq_set_irq_type(ucb->irq, IRQ_TYPE_EDGE_RISING); irq_set_handler_data(ucb->irq, ucb); irq_set_chained_handler(ucb->irq, ucb1x00_irq); if (pdata && pdata->gpio_base) { ucb->gpio.label = dev_name(&ucb->dev); ucb->gpio.dev = &ucb->dev; ucb->gpio.owner = THIS_MODULE; ucb->gpio.base = pdata->gpio_base; ucb->gpio.ngpio = 10; ucb->gpio.set = ucb1x00_gpio_set; ucb->gpio.get = ucb1x00_gpio_get; ucb->gpio.direction_input = ucb1x00_gpio_direction_input; ucb->gpio.direction_output = ucb1x00_gpio_direction_output; ucb->gpio.to_irq = ucb1x00_to_irq; ret = gpiochip_add(&ucb->gpio); if (ret) goto err_gpio_add; } else dev_info(&ucb->dev, "gpio_base not set so no gpiolib support"); mcp_set_drvdata(mcp, ucb); if (pdata) device_set_wakeup_capable(&ucb->dev, pdata->can_wakeup); INIT_LIST_HEAD(&ucb->devs); mutex_lock(&ucb1x00_mutex); list_add_tail(&ucb->node, &ucb1x00_devices); list_for_each_entry(drv, &ucb1x00_drivers, node) { ucb1x00_add_dev(ucb, drv); } mutex_unlock(&ucb1x00_mutex); return ret; err_gpio_add: irq_set_chained_handler(ucb->irq, NULL); err_irq_alloc: if (ucb->irq_base > 0) irq_free_descs(ucb->irq_base, 16); err_no_irq: device_del(&ucb->dev); err_dev_add: put_device(&ucb->dev); out: if (pdata && pdata->reset) pdata->reset(UCB_RST_PROBE_FAIL); return ret; } static void ucb1x00_remove(struct mcp *mcp) { struct ucb1x00_plat_data *pdata = mcp->attached_device.platform_data; struct ucb1x00 *ucb = mcp_get_drvdata(mcp); struct list_head *l, *n; int ret; mutex_lock(&ucb1x00_mutex); list_del(&ucb->node); list_for_each_safe(l, n, &ucb->devs) { struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, dev_node); ucb1x00_remove_dev(dev); } mutex_unlock(&ucb1x00_mutex); if (ucb->gpio.base != -1) { ret = gpiochip_remove(&ucb->gpio); if (ret) dev_err(&ucb->dev, "Can't remove gpio chip: %d\n", ret); } irq_set_chained_handler(ucb->irq, NULL); irq_free_descs(ucb->irq_base, 16); device_unregister(&ucb->dev); if (pdata && pdata->reset) pdata->reset(UCB_RST_REMOVE); } int ucb1x00_register_driver(struct ucb1x00_driver *drv) { struct ucb1x00 *ucb; INIT_LIST_HEAD(&drv->devs); mutex_lock(&ucb1x00_mutex); list_add_tail(&drv->node, &ucb1x00_drivers); list_for_each_entry(ucb, &ucb1x00_devices, node) { ucb1x00_add_dev(ucb, drv); } mutex_unlock(&ucb1x00_mutex); return 0; } void ucb1x00_unregister_driver(struct ucb1x00_driver *drv) { struct list_head *n, *l; mutex_lock(&ucb1x00_mutex); list_del(&drv->node); list_for_each_safe(l, n, &drv->devs) { struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, drv_node); ucb1x00_remove_dev(dev); } mutex_unlock(&ucb1x00_mutex); } #ifdef CONFIG_PM_SLEEP static int ucb1x00_suspend(struct device *dev) { struct ucb1x00_plat_data *pdata = dev_get_platdata(dev); struct ucb1x00 *ucb = dev_get_drvdata(dev); struct ucb1x00_dev *udev; mutex_lock(&ucb1x00_mutex); list_for_each_entry(udev, &ucb->devs, dev_node) { if (udev->drv->suspend) udev->drv->suspend(udev); } mutex_unlock(&ucb1x00_mutex); if (ucb->irq_wake) { unsigned long flags; raw_spin_lock_irqsave(&ucb->irq_lock, flags); ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl & ucb->irq_wake); ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl & ucb->irq_wake); ucb1x00_disable(ucb); raw_spin_unlock_irqrestore(&ucb->irq_lock, flags); enable_irq_wake(ucb->irq); } else if (pdata && pdata->reset) pdata->reset(UCB_RST_SUSPEND); return 0; } static int ucb1x00_resume(struct device *dev) { struct ucb1x00_plat_data *pdata = dev_get_platdata(dev); struct ucb1x00 *ucb = dev_get_drvdata(dev); struct ucb1x00_dev *udev; if (!ucb->irq_wake && pdata && pdata->reset) pdata->reset(UCB_RST_RESUME); ucb1x00_enable(ucb); ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out); ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir); if (ucb->irq_wake) { unsigned long flags; raw_spin_lock_irqsave(&ucb->irq_lock, flags); ucb1x00_reg_write(ucb, UCB_IE_RIS, ucb->irq_ris_enbl & ucb->irq_mask); ucb1x00_reg_write(ucb, UCB_IE_FAL, ucb->irq_fal_enbl & ucb->irq_mask); raw_spin_unlock_irqrestore(&ucb->irq_lock, flags); disable_irq_wake(ucb->irq); } ucb1x00_disable(ucb); mutex_lock(&ucb1x00_mutex); list_for_each_entry(udev, &ucb->devs, dev_node) { if (udev->drv->resume) udev->drv->resume(udev); } mutex_unlock(&ucb1x00_mutex); return 0; } #endif static const struct dev_pm_ops ucb1x00_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(ucb1x00_suspend, ucb1x00_resume) }; static struct mcp_driver ucb1x00_driver = { .drv = { .name = "ucb1x00", .owner = THIS_MODULE, .pm = &ucb1x00_pm_ops, }, .probe = ucb1x00_probe, .remove = ucb1x00_remove, }; static int __init ucb1x00_init(void) { int ret = class_register(&ucb1x00_class); if (ret == 0) { ret = mcp_driver_register(&ucb1x00_driver); if (ret) class_unregister(&ucb1x00_class); } return ret; } static void __exit ucb1x00_exit(void) { mcp_driver_unregister(&ucb1x00_driver); class_unregister(&ucb1x00_class); } module_init(ucb1x00_init); module_exit(ucb1x00_exit); EXPORT_SYMBOL(ucb1x00_io_set_dir); EXPORT_SYMBOL(ucb1x00_io_write); EXPORT_SYMBOL(ucb1x00_io_read); EXPORT_SYMBOL(ucb1x00_adc_enable); EXPORT_SYMBOL(ucb1x00_adc_read); EXPORT_SYMBOL(ucb1x00_adc_disable); EXPORT_SYMBOL(ucb1x00_register_driver); EXPORT_SYMBOL(ucb1x00_unregister_driver); MODULE_ALIAS("mcp:ucb1x00"); MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); MODULE_DESCRIPTION("UCB1x00 core driver"); MODULE_LICENSE("GPL");