diff options
| author | David Fries <david@fries.net> | 2008-10-15 22:05:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:51 -0700 |
| commit | 19e7184f75354c50bc196d856ff903b2add5ff5a (patch) | |
| tree | 803c74bdb9b81b0122afb3ffdc59262233349bc0 /drivers | |
| parent | e464af24734c40853dd68ec694d83a82e3930d66 (diff) | |
| download | linux-19e7184f75354c50bc196d856ff903b2add5ff5a.tar.gz linux-19e7184f75354c50bc196d856ff903b2add5ff5a.tar.bz2 linux-19e7184f75354c50bc196d856ff903b2add5ff5a.zip | |
W1: ds2490.c magic number work
This replaces some magic numbers with marcos and corrects one marco.
Signed-off-by: David Fries <david@fries.net>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/w1/masters/ds2490.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c index 0f356939b349..29df1d2998b2 100644 --- a/drivers/w1/masters/ds2490.c +++ b/drivers/w1/masters/ds2490.c @@ -88,7 +88,7 @@ #define COMM_DT 0x2000 #define COMM_SPU 0x1000 #define COMM_F 0x0800 -#define COMM_NTP 0x0400 +#define COMM_NTF 0x0400 #define COMM_ICP 0x0200 #define COMM_RST 0x0100 @@ -440,7 +440,7 @@ static int ds_wait_status(struct ds_device *dev, struct ds_status *st) printk("\n"); } #endif - } while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100); + } while (!(buf[0x08] & ST_IDLE) && !(err < 0) && ++count < 100); if (err >= 16 && st->status & ST_EPOF) { printk(KERN_INFO "Resetting device after ST_EPOF.\n"); @@ -470,8 +470,16 @@ static int ds_reset(struct ds_device *dev) { int err; - //err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE, SPEED_FLEXIBLE); - err = ds_send_control(dev, 0x43, SPEED_NORMAL); + /* Other potentionally interesting flags for reset. + * + * COMM_NTF: Return result register feedback. This could be used to + * detect some conditions such as short, alarming presence, or + * detect if a new device was detected. + * + * COMM_SE which allows SPEED_NORMAL, SPEED_FLEXIBLE, SPEED_OVERDRIVE: + * Select the data transfer rate. + */ + err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_IM, SPEED_NORMAL); if (err) return err; |