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Message-Id: <1273623056-1243-4-git-send-email-lars@metafoo.de>
Date: Wed, 12 May 2010 02:10:55 +0200
From: Lars-Peter Clausen <lars@...afoo.de>
To: sameo@...ux.intel.com
Cc: fercerpav@...il.com, linux-kernel@...r.kernel.org,
Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 3/4] MFD: pcf50633: Use threaded irq
Use threaded oneshot irq handler instead of normal irq handler and a workqueue.
Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
---
drivers/mfd/Makefile | 2 +-
drivers/mfd/pcf50633-core.c | 57 +++++++------------------------------------
2 files changed, 10 insertions(+), 49 deletions(-)
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 4c684c1..8593496 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -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
diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index 6f7fb60..fc5cd7f 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -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 */
@@ -651,8 +615,6 @@ 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);
@@ -666,7 +628,6 @@ 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);
--
1.5.6.5
--
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