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mfd: Use threaded irq for pcf50633

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Use threaded oneshot irq handler instead of normal irq handler and a workqueue.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Lars-Peter Clausen 2010-05-12 02:10:55 +02:00 committed by Samuel Ortiz
parent 6438a694b6
commit f7b2a77fe6
2 changed files with 10 additions and 49 deletions
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2
drivers/mfd/Makefile
View file

@ -57,7 +57,7 @@ obj-$(CONFIG_PMIC_DA903X) += da903x.o
max8925-objs := max8925-core.o max8925-i2c.o
obj-$(CONFIG_MFD_MAX8925) += max8925.o
obj-$(CONFIG_MFD_PCF50633) += pcf50633-core.o
obj-$(CONFIG_MFD_PCF50633) += pcf50633-core.o pcf50633-irq.o
obj-$(CONFIG_PCF50633_ADC) += pcf50633-adc.o
obj-$(CONFIG_PCF50633_GPIO) += pcf50633-gpio.o
obj-$(CONFIG_ABX500_CORE) += abx500-core.o

57
drivers/mfd/pcf50633-core.c
View file

@ -325,14 +325,12 @@ static void pcf50633_irq_call_handler(struct pcf50633 *pcf, int irq)
/* Maximum amount of time ONKEY is held before emergency action is taken */
#define PCF50633_ONKEY1S_TIMEOUT 8
static void pcf50633_irq_worker(struct work_struct *work)
static irqreturn_t pcf50633_irq(int irq, void *data)
{
struct pcf50633 *pcf;
struct pcf50633 *pcf = data;
int ret, i, j;
u8 pcf_int[5], chgstat;
pcf = container_of(work, struct pcf50633, irq_work);
/* Read the 5 INT regs in one transaction */
ret = pcf50633_read_block(pcf, PCF50633_REG_INT1,
ARRAY_SIZE(pcf_int), pcf_int);
@ -436,21 +434,7 @@ static void pcf50633_irq_worker(struct work_struct *work)
}
out:
put_device(pcf->dev);
enable_irq(pcf->irq);
}
static irqreturn_t pcf50633_irq(int irq, void *data)
{
struct pcf50633 *pcf = data;
dev_dbg(pcf->dev, "pcf50633_irq\n");
get_device(pcf->dev);
disable_irq_nosync(pcf->irq);
queue_work(pcf->work_queue, &pcf->irq_work);
return IRQ_HANDLED;
return IRQ_HANDLED
}
static void
@ -488,9 +472,6 @@ static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
* henceforth */
disable_irq(pcf->irq);
/* Make sure that any running IRQ worker has quit */
cancel_work_sync(&pcf->irq_work);
/* Save the masks */
ret = pcf50633_read_block(pcf, PCF50633_REG_INT1M,
ARRAY_SIZE(pcf->suspend_irq_masks),
@ -531,16 +512,7 @@ static int pcf50633_resume(struct i2c_client *client)
if (ret < 0)
dev_err(pcf->dev, "Error restoring saved suspend masks\n");
/* Restore regulators' state */
get_device(pcf->dev);
/*
* Clear any pending interrupts and set resume reason if any.
* This will leave with enable_irq()
*/
pcf50633_irq_worker(&pcf->irq_work);
enable_irq(pcf->irq);
return 0;
}
@ -574,22 +546,13 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
pcf->dev = &client->dev;
pcf->i2c_client = client;
pcf->irq = client->irq;
pcf->work_queue = create_singlethread_workqueue("pcf50633");
if (!pcf->work_queue) {
dev_err(&client->dev, "Failed to alloc workqueue\n");
ret = -ENOMEM;
goto err_free;
}
INIT_WORK(&pcf->irq_work, pcf50633_irq_worker);
version = pcf50633_reg_read(pcf, 0);
variant = pcf50633_reg_read(pcf, 1);
if (version < 0 || variant < 0) {
dev_err(pcf->dev, "Unable to probe pcf50633\n");
ret = -ENODEV;
goto err_destroy_workqueue;
goto err_free;
}
dev_info(pcf->dev, "Probed device version %d variant %d\n",
@ -603,12 +566,13 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00);
pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00);
ret = request_irq(client->irq, pcf50633_irq,
IRQF_TRIGGER_LOW, "pcf50633", pcf);
ret = request_threaded_irq(client->irq, NULL, pcf50633_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"pcf50633", pcf);
if (ret) {
dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
goto err_destroy_workqueue;
goto err_free;
}
/* Create sub devices */
@ -654,8 +618,6 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
return 0;
err_destroy_workqueue:
destroy_workqueue(pcf->work_queue);
err_free:
i2c_set_clientdata(client, NULL);
kfree(pcf);
@ -669,7 +631,6 @@ static int __devexit pcf50633_remove(struct i2c_client *client)
int i;
free_irq(pcf->irq, pcf);
destroy_workqueue(pcf->work_queue);
platform_device_unregister(pcf->input_pdev);
platform_device_unregister(pcf->rtc_pdev);