diff options
Diffstat (limited to 'drivers/mfd/twl4030-irq.c')
| -rw-r--r-- | drivers/mfd/twl4030-irq.c | 94 |
1 files changed, 21 insertions, 73 deletions
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c index 291364c3943..e1e0944af2e 100644 --- a/drivers/mfd/twl4030-irq.c +++ b/drivers/mfd/twl4030-irq.c @@ -30,7 +30,6 @@ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> -#include <linux/kthread.h> #include <linux/slab.h> #include <linux/i2c/twl.h> @@ -278,59 +277,6 @@ static const struct sih sih_modules_twl5031[8] = { static unsigned twl4030_irq_base; -static struct completion irq_event; - -/* - * This thread processes interrupts reported by the Primary Interrupt Handler. - */ -static int twl4030_irq_thread(void *data) -{ - long irq = (long)data; - static unsigned i2c_errors; - static const unsigned max_i2c_errors = 100; - - - current->flags |= PF_NOFREEZE; - - while (!kthread_should_stop()) { - int ret; - int module_irq; - u8 pih_isr; - - /* Wait for IRQ, then read PIH irq status (also blocking) */ - wait_for_completion_interruptible(&irq_event); - - ret = twl_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr, - REG_PIH_ISR_P1); - if (ret) { - pr_warning("twl4030: I2C error %d reading PIH ISR\n", - ret); - if (++i2c_errors >= max_i2c_errors) { - printk(KERN_ERR "Maximum I2C error count" - " exceeded. Terminating %s.\n", - __func__); - break; - } - complete(&irq_event); - continue; - } - - /* these handlers deal with the relevant SIH irq status */ - local_irq_disable(); - for (module_irq = twl4030_irq_base; - pih_isr; - pih_isr >>= 1, module_irq++) { - if (pih_isr & 0x1) - generic_handle_irq(module_irq); - } - local_irq_enable(); - - enable_irq(irq); - } - - return 0; -} - /* * handle_twl4030_pih() is the desc->handle method for the twl4030 interrupt. * This is a chained interrupt, so there is no desc->action method for it. @@ -342,9 +288,25 @@ static int twl4030_irq_thread(void *data) */ static irqreturn_t handle_twl4030_pih(int irq, void *devid) { - /* Acknowledge, clear *AND* mask the interrupt... */ - disable_irq_nosync(irq); - complete(devid); + int module_irq; + irqreturn_t ret; + u8 pih_isr; + + ret = twl_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr, + REG_PIH_ISR_P1); + if (ret) { + pr_warning("twl4030: I2C error %d reading PIH ISR\n", ret); + return IRQ_NONE; + } + + /* these handlers deal with the relevant SIH irq status */ + for (module_irq = twl4030_irq_base; + pih_isr; + pih_isr >>= 1, module_irq++) { + if (pih_isr & 0x1) + generic_handle_irq(module_irq); + } + return IRQ_HANDLED; } /*----------------------------------------------------------------------*/ @@ -763,7 +725,6 @@ int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) int status; int i; - struct task_struct *task; /* * Mask and clear all TWL4030 interrupts since initially we do @@ -806,27 +767,14 @@ int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) } /* install an irq handler to demultiplex the TWL4030 interrupt */ - - - init_completion(&irq_event); - - status = request_irq(irq_num, handle_twl4030_pih, IRQF_DISABLED, - "TWL4030-PIH", &irq_event); + status = request_threaded_irq(irq_num, NULL, handle_twl4030_pih, + IRQF_DISABLED, "TWL4030-PIH", NULL); if (status < 0) { pr_err("twl4030: could not claim irq%d: %d\n", irq_num, status); goto fail_rqirq; } - task = kthread_run(twl4030_irq_thread, (void *)(long)irq_num, - "twl4030-irq"); - if (IS_ERR(task)) { - pr_err("twl4030: could not create irq %d thread!\n", irq_num); - status = PTR_ERR(task); - goto fail_kthread; - } return status; -fail_kthread: - free_irq(irq_num, &irq_event); fail_rqirq: /* clean up twl4030_sih_setup */ fail: |