[rtc-linux] [PATCH 02/15] rtc: rx8025: Convert to threaded IRQ
From: Alexandre Belloni <hidden>
Date: 2015-08-04 09:49:40
Also in:
lkml
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
The driver currently emulates the concept of threaded IRQ using a workqueue, switch to threaded IRQ instead. Signed-off-by: Alexandre Belloni <redacted> --- drivers/rtc/rtc-rx8025.c | 37 ++++--------------------------------- 1 file changed, 4 insertions(+), 33 deletions(-)
diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index a943e1c08263..d8737713135d 100644
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c@@ -71,9 +71,7 @@ MODULE_DEVICE_TABLE(i2c, rx8025_id); struct rx8025_data { struct i2c_client *client; struct rtc_device *rtc; - struct work_struct work; u8 ctrl1; - unsigned exiting:1; }; static int rx8025_read_reg(struct i2c_client *client, int number, u8 *value)
@@ -128,26 +126,12 @@ static int rx8025_write_regs(struct i2c_client *client, return ret; } -static irqreturn_t rx8025_irq(int irq, void *dev_id) +static irqreturn_t rx8025_handle_irq(int irq, void *dev_id) { struct i2c_client *client = dev_id; struct rx8025_data *rx8025 = i2c_get_clientdata(client); - - disable_irq_nosync(irq); - schedule_work(&rx8025->work); - return IRQ_HANDLED; -} - -static void rx8025_work(struct work_struct *work) -{ - struct rx8025_data *rx8025 = container_of(work, struct rx8025_data, - work); - struct i2c_client *client = rx8025->client; - struct mutex *lock = &rx8025->rtc->ops_lock; u8 status; - mutex_lock(lock); - if (rx8025_read_reg(client, RX8025_REG_CTRL2, &status)) goto out;
@@ -175,10 +159,7 @@ static void rx8025_work(struct work_struct *work) status | RX8025_BIT_CTRL2_XST); out: - if (!rx8025->exiting) - enable_irq(client->irq); - - mutex_unlock(lock); + return IRQ_HANDLED; } static int rx8025_get_time(struct device *dev, struct rtc_time *dt)
@@ -550,7 +531,6 @@ static int rx8025_probe(struct i2c_client *client, rx8025->client = client; i2c_set_clientdata(client, rx8025); - INIT_WORK(&rx8025->work, rx8025_work); err = rx8025_init_client(client, &need_reset); if (err)
@@ -574,7 +554,7 @@ static int rx8025_probe(struct i2c_client *client, if (client->irq > 0) { dev_info(&client->dev, "IRQ %d supplied\n", client->irq); - err = request_irq(client->irq, rx8025_irq, + err = request_threaded_irq(client->irq, NULL, rx8025_handle_irq, 0, "rx8025", client); if (err) { dev_err(&client->dev, "unable to request IRQ\n");
@@ -602,17 +582,8 @@ errout: static int rx8025_remove(struct i2c_client *client) { - struct rx8025_data *rx8025 = i2c_get_clientdata(client); - struct mutex *lock = &rx8025->rtc->ops_lock; - - if (client->irq > 0) { - mutex_lock(lock); - rx8025->exiting = 1; - mutex_unlock(lock); - + if (client->irq > 0) free_irq(client->irq, client); - cancel_work_sync(&rx8025->work); - } rx8025_sysfs_unregister(&client->dev); return 0;
--
2.1.4
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