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path: root/drivers/rtc/rtc-ds1305.c
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Diffstat (limited to 'drivers/rtc/rtc-ds1305.c')
-rw-r--r--drivers/rtc/rtc-ds1305.c102
1 files changed, 37 insertions, 65 deletions
diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c
index 3a33b1fdbe0..129add77065 100644
--- a/drivers/rtc/rtc-ds1305.c
+++ b/drivers/rtc/rtc-ds1305.c
@@ -158,7 +158,7 @@ static int ds1305_alarm_irq_enable(struct device *dev, unsigned int enabled)
goto done;
buf[1] &= ~DS1305_AEI0;
}
- err = spi_write_then_read(ds1305->spi, buf, sizeof buf, NULL, 0);
+ err = spi_write_then_read(ds1305->spi, buf, sizeof(buf), NULL, 0);
if (err >= 0)
ds1305->ctrl[0] = buf[1];
done:
@@ -181,8 +181,8 @@ static int ds1305_get_time(struct device *dev, struct rtc_time *time)
/* Use write-then-read to get all the date/time registers
* since dma from stack is nonportable
*/
- status = spi_write_then_read(ds1305->spi, &addr, sizeof addr,
- buf, sizeof buf);
+ status = spi_write_then_read(ds1305->spi, &addr, sizeof(addr),
+ buf, sizeof(buf));
if (status < 0)
return status;
@@ -237,7 +237,7 @@ static int ds1305_set_time(struct device *dev, struct rtc_time *time)
buf[4], buf[5], buf[6], buf[7]);
/* use write-then-read since dma from stack is nonportable */
- return spi_write_then_read(ds1305->spi, buf, sizeof buf,
+ return spi_write_then_read(ds1305->spi, buf, sizeof(buf),
NULL, 0);
}
@@ -286,8 +286,8 @@ static int ds1305_get_alarm(struct device *dev, struct rtc_wkalrm *alm)
* of EFI status is at best fragile anyway (given IRQ handlers).
*/
addr = DS1305_CONTROL;
- status = spi_write_then_read(spi, &addr, sizeof addr,
- ds1305->ctrl, sizeof ds1305->ctrl);
+ status = spi_write_then_read(spi, &addr, sizeof(addr),
+ ds1305->ctrl, sizeof(ds1305->ctrl));
if (status < 0)
return status;
@@ -296,8 +296,8 @@ static int ds1305_get_alarm(struct device *dev, struct rtc_wkalrm *alm)
/* get and check ALM0 registers */
addr = DS1305_ALM0(DS1305_SEC);
- status = spi_write_then_read(spi, &addr, sizeof addr,
- buf, sizeof buf);
+ status = spi_write_then_read(spi, &addr, sizeof(addr),
+ buf, sizeof(buf));
if (status < 0)
return status;
@@ -381,7 +381,7 @@ static int ds1305_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
"alm0 write", buf[1 + DS1305_SEC], buf[1 + DS1305_MIN],
buf[1 + DS1305_HOUR], buf[1 + DS1305_WDAY]);
- status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0);
+ status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0);
if (status < 0)
return status;
@@ -474,7 +474,7 @@ static void ds1305_work(struct work_struct *work)
buf[1] = ds1305->ctrl[0];
buf[2] = 0;
- status = spi_write_then_read(spi, buf, sizeof buf,
+ status = spi_write_then_read(spi, buf, sizeof(buf),
NULL, 0);
if (status < 0)
dev_dbg(&spi->dev, "clear irq --> %d\n", status);
@@ -601,12 +601,12 @@ static struct bin_attribute nvram = {
* Interface to SPI stack
*/
-static int __devinit ds1305_probe(struct spi_device *spi)
+static int ds1305_probe(struct spi_device *spi)
{
struct ds1305 *ds1305;
int status;
u8 addr, value;
- struct ds1305_platform_data *pdata = spi->dev.platform_data;
+ struct ds1305_platform_data *pdata = dev_get_platdata(&spi->dev);
bool write_ctrl = false;
/* Sanity check board setup data. This may be hooked up
@@ -619,7 +619,7 @@ static int __devinit ds1305_probe(struct spi_device *spi)
return -EINVAL;
/* set up driver data */
- ds1305 = kzalloc(sizeof *ds1305, GFP_KERNEL);
+ ds1305 = devm_kzalloc(&spi->dev, sizeof(*ds1305), GFP_KERNEL);
if (!ds1305)
return -ENOMEM;
ds1305->spi = spi;
@@ -627,17 +627,15 @@ static int __devinit ds1305_probe(struct spi_device *spi)
/* read and cache control registers */
addr = DS1305_CONTROL;
- status = spi_write_then_read(spi, &addr, sizeof addr,
- ds1305->ctrl, sizeof ds1305->ctrl);
+ status = spi_write_then_read(spi, &addr, sizeof(addr),
+ ds1305->ctrl, sizeof(ds1305->ctrl));
if (status < 0) {
dev_dbg(&spi->dev, "can't %s, %d\n",
"read", status);
- goto fail0;
+ return status;
}
- dev_dbg(&spi->dev, "ctrl %s: %02x %02x %02x\n",
- "read", ds1305->ctrl[0],
- ds1305->ctrl[1], ds1305->ctrl[2]);
+ dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "read", ds1305->ctrl);
/* Sanity check register values ... partially compensating for the
* fact that SPI has no device handshake. A pullup on MISO would
@@ -646,8 +644,7 @@ static int __devinit ds1305_probe(struct spi_device *spi)
*/
if ((ds1305->ctrl[0] & 0x38) != 0 || (ds1305->ctrl[1] & 0xfc) != 0) {
dev_dbg(&spi->dev, "RTC chip is not present\n");
- status = -ENODEV;
- goto fail0;
+ return -ENODEV;
}
if (ds1305->ctrl[2] == 0)
dev_dbg(&spi->dev, "chip may not be present\n");
@@ -662,11 +659,11 @@ static int __devinit ds1305_probe(struct spi_device *spi)
buf[0] = DS1305_WRITE | DS1305_CONTROL;
buf[1] = ds1305->ctrl[0];
- status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0);
+ status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0);
dev_dbg(&spi->dev, "clear WP --> %d\n", status);
if (status < 0)
- goto fail0;
+ return status;
}
/* on DS1305, maybe start oscillator; like most low power
@@ -716,25 +713,23 @@ static int __devinit ds1305_probe(struct spi_device *spi)
buf[1] = ds1305->ctrl[0];
buf[2] = ds1305->ctrl[1];
buf[3] = ds1305->ctrl[2];
- status = spi_write_then_read(spi, buf, sizeof buf, NULL, 0);
+ status = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0);
if (status < 0) {
dev_dbg(&spi->dev, "can't %s, %d\n",
"write", status);
- goto fail0;
+ return status;
}
- dev_dbg(&spi->dev, "ctrl %s: %02x %02x %02x\n",
- "write", ds1305->ctrl[0],
- ds1305->ctrl[1], ds1305->ctrl[2]);
+ dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "write", ds1305->ctrl);
}
/* see if non-Linux software set up AM/PM mode */
addr = DS1305_HOUR;
- status = spi_write_then_read(spi, &addr, sizeof addr,
- &value, sizeof value);
+ status = spi_write_then_read(spi, &addr, sizeof(addr),
+ &value, sizeof(value));
if (status < 0) {
dev_dbg(&spi->dev, "read HOUR --> %d\n", status);
- goto fail0;
+ return status;
}
ds1305->hr12 = (DS1305_HR_12 & value) != 0;
@@ -742,12 +737,12 @@ static int __devinit ds1305_probe(struct spi_device *spi)
dev_dbg(&spi->dev, "AM/PM\n");
/* register RTC ... from here on, ds1305->ctrl needs locking */
- ds1305->rtc = rtc_device_register("ds1305", &spi->dev,
+ ds1305->rtc = devm_rtc_device_register(&spi->dev, "ds1305",
&ds1305_ops, THIS_MODULE);
if (IS_ERR(ds1305->rtc)) {
status = PTR_ERR(ds1305->rtc);
dev_dbg(&spi->dev, "register rtc --> %d\n", status);
- goto fail0;
+ return status;
}
/* Maybe set up alarm IRQ; be ready to handle it triggering right
@@ -758,36 +753,26 @@ static int __devinit ds1305_probe(struct spi_device *spi)
*/
if (spi->irq) {
INIT_WORK(&ds1305->work, ds1305_work);
- status = request_irq(spi->irq, ds1305_irq,
+ status = devm_request_irq(&spi->dev, spi->irq, ds1305_irq,
0, dev_name(&ds1305->rtc->dev), ds1305);
if (status < 0) {
- dev_dbg(&spi->dev, "request_irq %d --> %d\n",
+ dev_err(&spi->dev, "request_irq %d --> %d\n",
spi->irq, status);
- goto fail1;
+ } else {
+ device_set_wakeup_capable(&spi->dev, 1);
}
-
- device_set_wakeup_capable(&spi->dev, 1);
}
/* export NVRAM */
status = sysfs_create_bin_file(&spi->dev.kobj, &nvram);
if (status < 0) {
- dev_dbg(&spi->dev, "register nvram --> %d\n", status);
- goto fail2;
+ dev_err(&spi->dev, "register nvram --> %d\n", status);
}
return 0;
-
-fail2:
- free_irq(spi->irq, ds1305);
-fail1:
- rtc_device_unregister(ds1305->rtc);
-fail0:
- kfree(ds1305);
- return status;
}
-static int __devexit ds1305_remove(struct spi_device *spi)
+static int ds1305_remove(struct spi_device *spi)
{
struct ds1305 *ds1305 = spi_get_drvdata(spi);
@@ -796,13 +781,10 @@ static int __devexit ds1305_remove(struct spi_device *spi)
/* carefully shut down irq and workqueue, if present */
if (spi->irq) {
set_bit(FLAG_EXITING, &ds1305->flags);
- free_irq(spi->irq, ds1305);
+ devm_free_irq(&spi->dev, spi->irq, ds1305);
cancel_work_sync(&ds1305->work);
}
- rtc_device_unregister(ds1305->rtc);
- spi_set_drvdata(spi, NULL);
- kfree(ds1305);
return 0;
}
@@ -810,21 +792,11 @@ static struct spi_driver ds1305_driver = {
.driver.name = "rtc-ds1305",
.driver.owner = THIS_MODULE,
.probe = ds1305_probe,
- .remove = __devexit_p(ds1305_remove),
+ .remove = ds1305_remove,
/* REVISIT add suspend/resume */
};
-static int __init ds1305_init(void)
-{
- return spi_register_driver(&ds1305_driver);
-}
-module_init(ds1305_init);
-
-static void __exit ds1305_exit(void)
-{
- spi_unregister_driver(&ds1305_driver);
-}
-module_exit(ds1305_exit);
+module_spi_driver(ds1305_driver);
MODULE_DESCRIPTION("RTC driver for DS1305 and DS1306 chips");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 22:43:30 +0000