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authorChris Verges <chrisv@cyberswitching.com>2009-09-23 03:46:22 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 18:39:45 +0400
commitf3d2570a1482a6d897ba29276964965f6fe970d8 (patch)
tree33d2652cd0ebd753b997addff0ed1c4a9460c971 /drivers/rtc/rtc-pcf2123.c
parent7f3923a184bb8e7ede5e5f58f1114bf7b8c611ea (diff)
downloadlinux-f3d2570a1482a6d897ba29276964965f6fe970d8.tar.xz
rtc-philips-pcf2123-rtc-spi-driver-updates
Signed-off: Chris Verges <chrisv@cyberswitching.com> Cc: Christian Pellegrin <chripell@fsfe.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-pcf2123.c')
-rw-r--r--drivers/rtc/rtc-pcf2123.c44
1 files changed, 32 insertions, 12 deletions
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index d07b199a0c94..e75df9d50e27 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -42,7 +42,7 @@
#include <linux/rtc.h>
#include <linux/spi/spi.h>
-#define DRV_VERSION "0.5"
+#define DRV_VERSION "0.6"
#define PCF2123_REG_CTRL1 (0x00) /* Control Register 1 */
#define PCF2123_REG_CTRL2 (0x01) /* Control Register 2 */
@@ -61,7 +61,7 @@
static struct spi_driver pcf2123_driver;
struct pcf2123_sysfs_reg {
- struct device_attribute attr; /* must be first */
+ struct device_attribute attr;
char name[2];
};
@@ -84,27 +84,42 @@ static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr,
char *buffer)
{
struct spi_device *spi = to_spi_device(dev);
- struct pcf2123_sysfs_reg *r = (struct pcf2123_sysfs_reg *) attr;
+ struct pcf2123_sysfs_reg *r;
u8 txbuf[1], rxbuf[1];
+ unsigned long reg;
int ret;
- txbuf[0] = PCF2123_READ | simple_strtoul(r->name, NULL, 16);
+ r = container_of(attr, struct pcf2123_sysfs_reg, attr);
+
+ if (strict_strtoul(r->name, 16, &reg))
+ return -EINVAL;
+
+ txbuf[0] = PCF2123_READ | reg;
ret = spi_write_then_read(spi, txbuf, 1, rxbuf, 1);
if (ret < 0)
- return sprintf(buffer, "error: %d", ret);
+ return -EIO;
pcf2123_delay_trec();
- return sprintf(buffer, "0x%x", rxbuf[0]);
+ return sprintf(buffer, "0x%x\n", rxbuf[0]);
}
static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr,
const char *buffer, size_t count) {
struct spi_device *spi = to_spi_device(dev);
- struct pcf2123_sysfs_reg *r = (struct pcf2123_sysfs_reg *) attr;
+ struct pcf2123_sysfs_reg *r;
u8 txbuf[2];
+ unsigned long reg;
+ unsigned long val;
+
int ret;
- txbuf[0] = PCF2123_WRITE | simple_strtoul(r->name, NULL, 16);
- txbuf[1] = simple_strtoul(buffer, NULL, 0);
+ r = container_of(attr, struct pcf2123_sysfs_reg, attr);
+
+ if (strict_strtoul(r->name, 16, &reg)
+ || strict_strtoul(buffer, 10, &val))
+ return -EINVAL;
+
+ txbuf[0] = PCF2123_WRITE | reg;
+ txbuf[1] = val;
ret = spi_write(spi, txbuf, sizeof(txbuf));
if (ret < 0)
return -EIO;
@@ -220,7 +235,7 @@ static int __devinit pcf2123_probe(struct spi_device *spi)
txbuf[0], txbuf[1]);
ret = spi_write(spi, txbuf, 2 * sizeof(u8));
if (ret < 0)
- return ret;
+ goto kfree_exit;
pcf2123_delay_trec();
/* Stop the counter */
@@ -230,7 +245,7 @@ static int __devinit pcf2123_probe(struct spi_device *spi)
txbuf[0], txbuf[1]);
ret = spi_write(spi, txbuf, 2 * sizeof(u8));
if (ret < 0)
- return ret;
+ goto kfree_exit;
pcf2123_delay_trec();
/* See if the counter was actually stopped */
@@ -284,11 +299,16 @@ static int __devinit pcf2123_probe(struct spi_device *spi)
if (ret) {
dev_err(&spi->dev, "Unable to create sysfs %s\n",
pdata->regs[i].name);
- pdata->regs[i].name[0] = '\0';
+ goto sysfs_exit;
}
}
return 0;
+
+sysfs_exit:
+ for (i--; i >= 0; i--)
+ device_remove_file(&spi->dev, &pdata->regs[i].attr);
+
kfree_exit:
kfree(pdata);
spi->dev.platform_data = NULL;