diff options
Diffstat (limited to 'drivers/mfd/twl6040-irq.c')
| -rw-r--r-- | drivers/mfd/twl6040-irq.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/drivers/mfd/twl6040-irq.c b/drivers/mfd/twl6040-irq.c deleted file mode 100644 index 4b42543..0000000 --- a/drivers/mfd/twl6040-irq.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Interrupt controller support for TWL6040 - * - * Author: Misael Lopez Cruz <misael.lopez@ti.com> - * - * Copyright: (C) 2011 Texas Instruments, Inc. - * - * 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. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/err.h> -#include <linux/irq.h> -#include <linux/of.h> -#include <linux/irqdomain.h> -#include <linux/interrupt.h> -#include <linux/mfd/core.h> -#include <linux/mfd/twl6040.h> - -struct twl6040_irq_data { - int mask; - int status; -}; - -static struct twl6040_irq_data twl6040_irqs[] = { - { - .mask = TWL6040_THMSK, - .status = TWL6040_THINT, - }, - { - .mask = TWL6040_PLUGMSK, - .status = TWL6040_PLUGINT | TWL6040_UNPLUGINT, - }, - { - .mask = TWL6040_HOOKMSK, - .status = TWL6040_HOOKINT, - }, - { - .mask = TWL6040_HFMSK, - .status = TWL6040_HFINT, - }, - { - .mask = TWL6040_VIBMSK, - .status = TWL6040_VIBINT, - }, - { - .mask = TWL6040_READYMSK, - .status = TWL6040_READYINT, - }, -}; - -static inline -struct twl6040_irq_data *irq_to_twl6040_irq(struct twl6040 *twl6040, - int irq) -{ - return &twl6040_irqs[irq - twl6040->irq_base]; -} - -static void twl6040_irq_lock(struct irq_data *data) -{ - struct twl6040 *twl6040 = irq_data_get_irq_chip_data(data); - - mutex_lock(&twl6040->irq_mutex); -} - -static void twl6040_irq_sync_unlock(struct irq_data *data) -{ - struct twl6040 *twl6040 = irq_data_get_irq_chip_data(data); - - /* write back to hardware any change in irq mask */ - if (twl6040->irq_masks_cur != twl6040->irq_masks_cache) { - twl6040->irq_masks_cache = twl6040->irq_masks_cur; - twl6040_reg_write(twl6040, TWL6040_REG_INTMR, - twl6040->irq_masks_cur); - } - - mutex_unlock(&twl6040->irq_mutex); -} - -static void twl6040_irq_enable(struct irq_data *data) -{ - struct twl6040 *twl6040 = irq_data_get_irq_chip_data(data); - struct twl6040_irq_data *irq_data = irq_to_twl6040_irq(twl6040, - data->irq); - - twl6040->irq_masks_cur &= ~irq_data->mask; -} - -static void twl6040_irq_disable(struct irq_data *data) -{ - struct twl6040 *twl6040 = irq_data_get_irq_chip_data(data); - struct twl6040_irq_data *irq_data = irq_to_twl6040_irq(twl6040, - data->irq); - - twl6040->irq_masks_cur |= irq_data->mask; -} - -static struct irq_chip twl6040_irq_chip = { - .name = "twl6040", - .irq_bus_lock = twl6040_irq_lock, - .irq_bus_sync_unlock = twl6040_irq_sync_unlock, - .irq_enable = twl6040_irq_enable, - .irq_disable = twl6040_irq_disable, -}; - -static irqreturn_t twl6040_irq_thread(int irq, void *data) -{ - struct twl6040 *twl6040 = data; - u8 intid; - int i; - - intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); - - /* apply masking and report (backwards to handle READYINT first) */ - for (i = ARRAY_SIZE(twl6040_irqs) - 1; i >= 0; i--) { - if (twl6040->irq_masks_cur & twl6040_irqs[i].mask) - intid &= ~twl6040_irqs[i].status; - if (intid & twl6040_irqs[i].status) - handle_nested_irq(twl6040->irq_base + i); - } - - /* ack unmasked irqs */ - twl6040_reg_write(twl6040, TWL6040_REG_INTID, intid); - - return IRQ_HANDLED; -} - -int twl6040_irq_init(struct twl6040 *twl6040) -{ - struct device_node *node = twl6040->dev->of_node; - int i, nr_irqs, irq_base, ret; - u8 val; - - mutex_init(&twl6040->irq_mutex); - - /* mask the individual interrupt sources */ - twl6040->irq_masks_cur = TWL6040_ALLINT_MSK; - twl6040->irq_masks_cache = TWL6040_ALLINT_MSK; - twl6040_reg_write(twl6040, TWL6040_REG_INTMR, TWL6040_ALLINT_MSK); - - nr_irqs = ARRAY_SIZE(twl6040_irqs); - - irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0); - if (IS_ERR_VALUE(irq_base)) { - dev_err(twl6040->dev, "Fail to allocate IRQ descs\n"); - return irq_base; - } - twl6040->irq_base = irq_base; - - irq_domain_add_legacy(node, ARRAY_SIZE(twl6040_irqs), irq_base, 0, - &irq_domain_simple_ops, NULL); - - /* Register them with genirq */ - for (i = irq_base; i < irq_base + nr_irqs; i++) { - irq_set_chip_data(i, twl6040); - irq_set_chip_and_handler(i, &twl6040_irq_chip, - handle_level_irq); - irq_set_nested_thread(i, 1); - - /* ARM needs us to explicitly flag the IRQ as valid - * and will set them noprobe when we do so. */ -#ifdef CONFIG_ARM - set_irq_flags(i, IRQF_VALID); -#else - irq_set_noprobe(i); -#endif - } - - ret = request_threaded_irq(twl6040->irq, NULL, twl6040_irq_thread, - IRQF_ONESHOT, "twl6040", twl6040); - if (ret) { - dev_err(twl6040->dev, "failed to request IRQ %d: %d\n", - twl6040->irq, ret); - return ret; - } - - /* reset interrupts */ - val = twl6040_reg_read(twl6040, TWL6040_REG_INTID); - - /* interrupts cleared on write */ - twl6040_clear_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_INTCLRMODE); - - return 0; -} -EXPORT_SYMBOL(twl6040_irq_init); - -void twl6040_irq_exit(struct twl6040 *twl6040) -{ - free_irq(twl6040->irq, twl6040); -} -EXPORT_SYMBOL(twl6040_irq_exit); |