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mfd: remove unused rk808-irq
Change-Id: I27138971c78d2ed9dae87e887b8804cdf499a69c Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
@@ -1,245 +0,0 @@
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/*
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* rk808-irq.c
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*
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* Author: zhangqing <zhangqing@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/bug.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/mfd/rk808.h>
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#include <linux/wakelock.h>
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#include <linux/kthread.h>
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#include <linux/irqdomain.h>
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#include <linux/regmap.h>
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static inline int irq_to_rk808_irq(struct rk808 *rk808,
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int irq)
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{
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return (irq - rk808->chip_irq);
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}
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/*
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* This is a threaded IRQ handler so can access I2C/SPI. Since all
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* interrupts are clear on read the IRQ line will be reasserted and
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* the physical IRQ will be handled again if another interrupt is
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* asserted while we run - in the normal course of events this is a
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* rare occurrence so we save I2C/SPI reads. We're also assuming that
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* it's rare to get lots of interrupts firing simultaneously so try to
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* minimise I/O.
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*/
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static irqreturn_t rk808_irq(int irq, void *irq_data)
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{
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struct rk808 *rk808 = irq_data;
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u32 irq_sts;
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u32 irq_mask;
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u8 reg;
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int i, cur_irq;
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// printk("%s,line=%d\n", __func__,__LINE__);
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wake_lock(&rk808->irq_wake);
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rk808_i2c_read(rk808, RK808_INT_STS_REG1, 1, ®);
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irq_sts = reg;
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rk808_i2c_read(rk808, RK808_INT_STS_REG2, 1, ®);
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irq_sts |= reg << 8;
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rk808_i2c_read(rk808, RK808_INT_STS_MSK_REG1, 1, ®);
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irq_mask = reg;
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rk808_i2c_read(rk808, RK808_INT_STS_MSK_REG2, 1, ®);
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irq_mask |= reg << 8;
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irq_sts &= ~irq_mask;
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if (!irq_sts)
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{
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wake_unlock(&rk808->irq_wake);
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return IRQ_NONE;
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}
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for (i = 0; i < rk808->irq_num; i++) {
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if (!(irq_sts & (1 << i)))
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continue;
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cur_irq = irq_find_mapping(rk808->irq_domain, i);
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if (cur_irq)
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handle_nested_irq(cur_irq);
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}
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/* Write the STS register back to clear IRQs we handled */
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reg = irq_sts & 0xFF;
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irq_sts >>= 8;
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rk808_i2c_write(rk808, RK808_INT_STS_REG1, 1, reg);
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reg = irq_sts & 0xFF;
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rk808_i2c_write(rk808, RK808_INT_STS_REG2, 1, reg);
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wake_unlock(&rk808->irq_wake);
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return IRQ_HANDLED;
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}
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static void rk808_irq_lock(struct irq_data *data)
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{
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struct rk808 *rk808 = irq_data_get_irq_chip_data(data);
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mutex_lock(&rk808->irq_lock);
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}
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static void rk808_irq_sync_unlock(struct irq_data *data)
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{
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struct rk808 *rk808 = irq_data_get_irq_chip_data(data);
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u32 reg_mask;
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u8 reg;
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rk808_i2c_read(rk808, RK808_INT_STS_MSK_REG1, 1, ®);
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reg_mask = reg;
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rk808_i2c_read(rk808, RK808_INT_STS_MSK_REG2, 1, ®);
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reg_mask |= reg << 8;
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if (rk808->irq_mask != reg_mask) {
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reg = rk808->irq_mask & 0xff;
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// rk808_i2c_write(rk808, RK808_INT_STS_MSK_REG1, 1, reg);
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reg = rk808->irq_mask >> 8 & 0xff;
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// rk808_i2c_write(rk808, RK808_INT_STS_MSK_REG2, 1, reg);
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}
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mutex_unlock(&rk808->irq_lock);
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}
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static void rk808_irq_enable(struct irq_data *data)
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{
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struct rk808 *rk808 = irq_data_get_irq_chip_data(data);
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rk808->irq_mask &= ~( 1 << irq_to_rk808_irq(rk808, data->irq));
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}
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static void rk808_irq_disable(struct irq_data *data)
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{
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struct rk808 *rk808 = irq_data_get_irq_chip_data(data);
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rk808->irq_mask |= ( 1 << irq_to_rk808_irq(rk808, data->irq));
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}
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#ifdef CONFIG_PM_SLEEP
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static int rk808_irq_set_wake(struct irq_data *data, unsigned int enable)
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{
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struct rk808 *rk808 = irq_data_get_irq_chip_data(data);
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return irq_set_irq_wake(rk808->chip_irq, enable);
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}
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#else
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#define rk808_irq_set_wake NULL
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#endif
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static struct irq_chip rk808_irq_chip = {
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.name = "rk808",
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.irq_bus_lock = rk808_irq_lock,
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.irq_bus_sync_unlock = rk808_irq_sync_unlock,
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.irq_disable = rk808_irq_disable,
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.irq_enable = rk808_irq_enable,
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.irq_set_wake = rk808_irq_set_wake,
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};
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static int rk808_irq_domain_map(struct irq_domain *d, unsigned int irq,
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irq_hw_number_t hw)
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{
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struct rk808 *rk808 = d->host_data;
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irq_set_chip_data(irq, rk808);
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irq_set_chip_and_handler(irq, &rk808_irq_chip, handle_edge_irq);
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irq_set_nested_thread(irq, 1);
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#ifdef CONFIG_ARM
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set_irq_flags(irq, IRQF_VALID);
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#else
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irq_set_noprobe(irq);
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#endif
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return 0;
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}
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static struct irq_domain_ops rk808_irq_domain_ops = {
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.map = rk808_irq_domain_map,
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};
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int rk808_irq_init(struct rk808 *rk808, int irq,struct rk808_board *pdata)
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{
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struct irq_domain *domain;
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int ret,val,irq_type,flags;
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u8 reg;
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// printk("%s,line=%d\n", __func__,__LINE__);
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if (!irq) {
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dev_warn(rk808->dev, "No interrupt support, no core IRQ\n");
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return 0;
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}
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/* Clear unattended interrupts */
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rk808_i2c_read(rk808, RK808_INT_STS_REG1, 1, ®);
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rk808_i2c_write(rk808, RK808_INT_STS_REG1, 1, reg);
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rk808_i2c_read(rk808, RK808_INT_STS_REG2, 1, ®);
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rk808_i2c_write(rk808, RK808_INT_STS_REG2, 1, reg);
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rk808_i2c_read(rk808, RK808_RTC_STATUS_REG, 1, ®);
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rk808_i2c_write(rk808, RK808_RTC_STATUS_REG, 1, reg);//clear alarm and timer interrupt
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/* Mask top level interrupts */
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rk808->irq_mask = 0xFFFFFF;
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mutex_init(&rk808->irq_lock);
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wake_lock_init(&rk808->irq_wake, WAKE_LOCK_SUSPEND, "rk808_irq_wake");
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rk808->irq_num = RK808_NUM_IRQ;
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rk808->irq_gpio = pdata->irq_gpio;
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if (rk808->irq_gpio && !rk808->chip_irq) {
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rk808->chip_irq = gpio_to_irq(rk808->irq_gpio);
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if (rk808->irq_gpio) {
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ret = gpio_request(rk808->irq_gpio, "rk808_pmic_irq");
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if (ret < 0) {
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dev_err(rk808->dev,
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"Failed to request gpio %d with ret:"
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"%d\n", rk808->irq_gpio, ret);
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return IRQ_NONE;
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}
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gpio_direction_input(rk808->irq_gpio);
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val = gpio_get_value(rk808->irq_gpio);
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if (val){
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irq_type = IRQ_TYPE_LEVEL_LOW;
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flags = IRQF_TRIGGER_FALLING;
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}
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else{
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irq_type = IRQ_TYPE_LEVEL_HIGH;
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flags = IRQF_TRIGGER_RISING;
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}
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gpio_free(rk808->irq_gpio);
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pr_info("%s: rk808_pmic_irq=%x\n", __func__, val);
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}
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}
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domain = irq_domain_add_linear(NULL, RK808_NUM_IRQ,
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&rk808_irq_domain_ops, rk808);
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if (!domain) {
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dev_err(rk808->dev, "could not create irq domain\n");
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return -ENODEV;
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}
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rk808->irq_domain = domain;
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ret = request_threaded_irq(rk808->chip_irq, NULL, rk808_irq, flags | IRQF_ONESHOT, "rk808", rk808);
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irq_set_irq_type(rk808->chip_irq, irq_type);
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enable_irq_wake(rk808->chip_irq);
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if (ret != 0)
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dev_err(rk808->dev, "Failed to request IRQ: %d\n", ret);
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return ret;
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}
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int rk808_irq_exit(struct rk808 *rk808)
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{
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if (rk808->chip_irq)
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free_irq(rk808->chip_irq, rk808);
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return 0;
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}
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